Codeware | COMPRESS Change List

Unable to change the skirt base plate thickness in Build 6262
It was not possible to change the skirt base plate thickness (t_b) in Build 6262. [7645]
ASME B16.5/B16.47 flange rating error
Due to a tolerance issue, a deficiency was sometimes issued stating the ASME B16.5/B16.47 rating was not sufficient when the flange limited the nozzle's maximum pressure rating. [7652]
Nozzle iteration error message
For a nozzle with an internal projection, a reinforcing pad, and no groove weld through the vessel wall, the error message "The nozzle calculations have iterated more than 100 times. Contact Codeware for assistance" was issued in the nozzle dialog when the pad width was not wide enough to accommodate the required full penetration groove weld through the pad. Now, the groove weld is set to the maximum permissible, and a deficiency is reported to alert the designer of this problem. Note that the maximum permissible groove weld is determined assuming a 30 degree angle at the lower portion of the groove weld. [7647]
Surface area of double base plates
The reported surface area of a double base plate type base ring was significantly less than the actual surface area. [7649]
Surface area reported in weight summary
The option to report the surface area in the Weight Summary is now saved with the file. Previously, the reporting of the surface area was a global default only. This option is set from the Report Defaults dialog. [7648]
Total surface area for vessels with base rings
The total surface area reported in the Weight Summary was not correct when the vessel included a skirt base ring. The total surface area included the skirt area twice and did not include the base ring area. [7515]
User with standard rights gets an incorrect error message
A user with standard rights gets an registry error message on starting COMPRESS. The error message states that the CodewareDraw20.ocx control is not registered even though it has been registered properly. [7646]

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Build 6262 changes

New Features

ASME Section VIII, Division 2 2007 Edition and 2008 Addenda
The new ASME Section VIII, Division 2 2007 code is now available as well as the 2008 Addenda. Details on what has been added may be seen here. [7604]
Minimal Reports and PDF Report Settings menu items
The Minimal Reports and PDF Report Settings menu items have been added to the Report menu, which is visible while viewing a report. Previously these items were only available on the Reports sub-menu under the Action menu. [7603]
Base Ring anchor bolt corrosion allowance clarified
The corrosion allowance reported for anchor bolts on a base ring now specifies that it is applied to the radius of the bolt. [7512]
Circumferential stress in F&D heads acting as Saddle Stiffeners
The factor M for the tensile stresses on an F&D head, which acts as a stiffener for a saddle supported vessel, is now hard coded to 1.0. This essentially looks only at the pure tensile stress in the crown portion of the head while ignoring the tendency to buckle in the crown portion of the head. [7486]
COMPRESS does not run with network key model 250+
When COMPRESS is started on a client machine, the error message, "COMPRESS cannot find an active NetHASP License Manager running on key server - servername" was issued. This happens with a nethasp key model 250+ and is limited to COMPRESS Builds 6260 and 6261. COMPRESS on the key server did not exhibit this behavior. [7590]
Heavy barrel nozzles without flanges
COMPRESS now includes an option to exclude the flange portion of a heavy barrel nozzle. This applies to type 9 and 10 nozzles, with flange types HB, FVC / FCI and custom integral forgings. The flange class rating can still be selected which will set the nozzle diameter and thickness values. The xml data file includes this information so Coster can properly determine a cost. [7492]
Hydrostatic test report
For the field test, a statement is now reported indicating the vessel orientation. [7572]
Items in the Project Toolbar are sorted alphabetically
The alphabetical sorting of items in the Project Toolbar is no longer case-sensitive. [7511]
Lift lug report sketch notation
The notation for the length values, l1, l2 and l3 have been changed on the lift force sketch to match the notation used in the report and help file. Previously this sketch used uppercase notation, L1, L2, and L3. [7556]
New option to specify Merge Nodes Tolerance for FEA-Nozzles
A new option is available on the FEA Details dialog to manually specify the Merge Nodes Tolerance for nozzle FEA calculations. This input is useful for correcting the FEA model in the case when gaps or tears occur in the deformed state. [7602]
No UCS-66.1 MDMT Reduction option switch
When the option No UCS-66.1 MDMT Reduction in the ASME Codes dialog is active and the coincident ratio is less than the minimum coincident ratio of 0.35, the exemption per UCS-66(b)(3) is no longer permitted. [7566]
Saddle ring stress calculations for rings outside the plane of the saddle
The second stress term in the calculation of the stress in the shell and rings has been multiplied by negative one when there are two rings outside the plane of the saddle. This was done to match the new Division 2 rules as well as the BS 5500 code. [7487]
Skirt base plate deficiency
To further clarify when the base plate width of a skirt base ring is not sufficient, "Increase the base plate width" has been added to the existing base plate deficiency, "Concrete foundation bearing stress is too high." [7551]
Split Report view
When viewing the report in HTML format, there is a new option available in the Window menu to split the report window. This makes it possible to view two reports at the same time and is useful for comparing and checking values. [7599]
UCS-6 check
A check has been added for the lethal service restriction of UCS-6 (b)(1). The check for USC-6 (b)(3) has been extended to include SA/CSA-G40.21 38W. Errors are reported if either of these conditions is not satisfied. A warning has been added for USC-6 (b)(2) since COMPRESS does not know if the vessel service will be for an unfired steam boiler. [6697]
Unsupported length 'L' determination with loose type flanges
In determining the unsupported length L for external pressure calculations, lap joint loose and split loose type flanges are no longer considered as lines of support. [7269]
Weight Summary Insulation Support Note
When insulation is present on a vessel but its Include in Lift Weight option is not active, an informative note will now be present in the Weight Summary report. The note reads as follows: "Vessel lift weight includes weight of insulation supports as they are assumed to be shop installed." [6640]
WRC-107 analysis report
The formula for R_m / t in the WRC-107 report section now includes the numerical values used for R_m and t. [7545]

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Bug Fixes

Save As operation after opening a file that is already in use
While working with a file that was already in use by another user, if the Save As feature was used to save a copy of the file in another directory without changing the file name, an error message appeared, stating that the file was already in use and that the changes were unable to be saved. [7589]
Weight Summary operating liquid weight from an internal head
The operating liquid weight from an internal bottom head in the Weight Summary was also applied to the shell element below the internal head. This caused the total vessel weight in the Weight Summary to be larger than it should have been. This error did not effect calculations in other areas of the report. [7491]
2001 Edition ASME materials list was not available
The ASME materials list was not available for the 2001 Edition in builds 6259 thru 6261. When the ASME materials list was opened while using the 2001 Edition, an error message was displayed that said Invalid Operation. [7495]
Appendix 1-5 maximum pressure determination
The Appendix 1-5 analysis now de-rates the maximum pressure used in the juncture check if the required thickness of the shell exceeds the corroded shell thickness, or if the cone required thickness exceeds the corroded cone thickness. [7565]
Appendix 1-9 nozzle mean diameter
For variable thickness nozzles, the mean diameter of the nozzle is now always taken at the thin portion of the nozzle neck. [7616]
ASME Low Strength Bolting Materials warning
The ASME B16.5/16.47 flange dialog error message "ANSI Low Strength Bolt material limited to 300# class and under" now includes the appropriate paragraph reference to the standard. For example, with a class 400 or greater ASME B16.5 2003 flange, attempting to select a low strength bolt material now displays the error message "ASME Low Strength Bolt material limited to flanges of Class 300 and under per B16.5 paragraph 5.3.4." If COMPRESS is set to Rating Mode, the same message will be reported as a warning in the Deficiencies report. [7463]
ASME U1A form U Certificate Authorization Number expiration date
In the Certificate of Shop/Field Compliance section of the PDF version of the ASME U1A form, the U Certificate Authorization Number is now aligned with its expiration date. [7475]
Clicking Cancel on the ASME B16.5/16.47 Flange dialog
When editing a nozzle with an attached integral forging with nozzle diameter or thickness values changed from the look-up values, opening and canceling out of the ASME B16.5/16.47 Flange dialog no longer resets these values. [7518]
Cone juncture MAWP deficiency
A deficiency has been added in the Deficiencies Summary if a transition's MAWP was less than the internal design pressure. [7544]
Crash - multiple lift lugs on a top head
COMPRESS crashed for rare geometry values with four lugs on a top head of a vertical vessel. [7612]
Crash in rare cases when shutting down COMPRESS
A crash has been corrected that occurred in rare cases while shutting down COMPRESS. [7483]
Crash on the Shortcut Nozzle Design dialog
COMPRESS crashed while designing a nozzle via the Shortcut Nozzle Design dialog if the Offset (L) from the datum line was past the top of the vessel. [7479]
Crash when a vertical load had an extremely large eccentricity value
COMPRESS crashed when a vertical load had an extremely large eccentricity value. [7587]
Crash when adding a Rigging Analysis if CG is not between the Lift Lugs
Adding a Rigging Analysis to a vessel with a center of gravity elevation that is not located between the top and bottom lift lug elevations caused a crash. A new sanity check prevents this and will display a warning that the lift lug configuration is invalid. [7482]
Crash with trunnion and tail lug above center of gravity
COMPRESS crashed if a vertical vessel had trunnion lift lugs and a tail lug located above the center of gravity. [7593]
Default calculation for large opening nozzles
The default calculation procedure for large openings was always being set to Appendix 1-10 for new files even if the Use Appendix 1-7 for large openings option was set in the Set Mode - Nozzles 1 page. [7613]
Disabled FEA calculations for nozzles attached to bolted covers
The FEA calculations for nozzles attached to bolted covers were incorrect and have been disabled. [7591]
Dished Cover - Minimum thickness
During the design of a dished cover when the last design dialog is initially displayed, the head and flange design thicknesses are correctly increased to meet the design thickness. If the Back button was utilized to return to the fist design dialog and a design parameter was changed (e.g. corrosion or design pressure) that resulted in an increase in design thickness, the head and flange thickness values were not increased to meet the new design thickness values when the last dialog was re-displayed. The head and flange thicknesses are now correctly refreshed for this sequence. [6692]
Dished cover hydrotest stress
The hydrotest stress for dished portion of the dished cover was incorrectly calculated based on the European Convention for Constructional Steelwork (ECCS) formula that estimates the head plastic buckling pressure. The hydrotest stress is now based on the formula for the dished portion from Appendix 1-6. Note that currently the hydrotest stress for the flanged portion of the dished cover is not calculated by COMPRESS. [7584]
Editing support skirt elevation offset
The location of a support skirt could not be moved to another parent component if the offset value was greater than the length of the original parent component. A message stating that the offset was beyond the limits of the attached component was displayed even if the offset value entered was valid. [7502]
FEA calculations for nozzles on welded covers
The FEA calculations for nozzles attached to welded covers gave excessive stresses because the FEA model was not set up correctly. The cylinder or cone that the flat head is attached to is now included in the FEA model to properly constrain the flat head. [7528]
Flange hub outer corrosion
Custom flanges permit the user to specify a bore and flange corrosion. COMPRESS does not currently include an input for flange outer corrosion. The flange corrosion for a custom flange was being applied as outer corrosion to the flange hub. This could result in an increase in the required hub thickness. COMPRESS now uses the outer corrosion value from the attached component for the flange hub outer corrosion. [7606]
Hydrotest multiplier for support lugs
A check is made in the support lug calculations to evaluate whether the hydrotest pressure is less than the internal design pressure. This may occur if testing is performed at a design pressure less than the MAWP of the parent component while in rating mode, or at a user defined test pressure less than the design pressure. The hydrotest multiplier used to re-define the test pressure is now correct if the test pressure is less than the design pressure. [7468]
Internal head external static liquid head height and specific gravity
The specific gravity and static liquid height of the external static liquid head for internal heads were both reported as 0. This did not affect any calculated values. [7595]
In-use file deleted when attempting to overwrite
When attempting to overwrite an existing .CW6 file that was already in use by another user, it was mistakenly deleted after an error message appeared, stating that the file was already in use and that changes were unable to be saved. [7588]
Leg support calculations when no shear present
In the calculation of the axial end load (P₁) for the case where no shear acts on the leg supports, the weight at the top of the legs was incorrectly used instead of the total weight of the vessel. In this scenario, the maximum stress is assumed to be at the base of the leg support. [7456]
Material thickness limitation on vacuum charts
The thickness limit for vacuum chart HT-1 material has been set to 64 mm for metric units instead of 63.5 mm (2.5 inch). This warning is reported if a material thickness is outside of the vacuum chart's acceptable thickness range. [7583]
Minimum font size in ASME and NBIC forms
When an ASME or NBIC form is generated, if the text entered in any particular box is too long to fit, the font size was automatically reduced in order to keep the text within its special constraints. The minimum text size has been increased to approximately an 8-point font from the previous equivalent of a 6-point font. [7498]
Minimum test pressure
An erroneous deficiency was reported for the minimum test pressure if the chamber MAWP was not calculated and the test pressure was based on UG-99(c) or UG-100(b). When the test pressure is based on the calculated pressure, COMPRESS checks to ensure the test pressure is greater than the minimum test pressure per UG-99(b) or UG-100(b). [7504]
Minimum test pressure check
If the test pressure basis for a field test was set to the calculated test pressure per UG-99(c) and the pressure basis for the shop test was set to the design pressure, it was possible that an incorrect deficiency would be generated for the shop test. Changing the test pressure basis for the field test would prevent the error. [7472]
Nozzle calculation - Welded pipe factor
In the nozzle calculation if the parent component and/or the nozzle is specified as welded pipe and either Table 1A W14 or Table 1B W12 is applicable to the specified material specification, the allowable stress is no longer increased to account for the pipe tolerance factor of 0.85 typically applied to the welded pipe allowable stress values published in ASME II-D. Both notes indicate that the allowable stresses do not include a weld factor. For example, Table 1A W14 states, "These S values do not include a weld factor. For Section VIII, Division 1 and Section XII applications using welds made without filler metal, the tabulated tensile stress values shall be multiplied by 0.85. For welds made with filler metal, consult UW-12 for Section VIII, Division 1, or TW-130.4 for Section XII, as applicable." [7541]
Nozzle full penetration weld error
An incorrect deficiency was reported for nozzle to shell welds if the nozzle's coincident stress ratio was less than 0.35. Additionally, the deficiency was only reported when full penetration groove welds were not specified and the design MDMT was specified less than -550F (-480C). The deficiency stated, "Due to MDMT of -65 0F and material selection, a full penetration weld is required on Nozzle (A) Category D joints (UW-2(b)(4))." [7520]
Nozzle MDMT
When in rating mode, an incorrect nozzle MDMT rating was calculated if the Calculate MAWP option switch was not active in the Set Mode\Calculations dialog. In this instance, the chamber MAWP used in the coincident ratio determination was zero. This incorrectly resulted in the -1550F (-1050C) exemption from impact testing per UCS-66(b)(3). [7501]
Nozzle on a dished cover, A_a & A_r
The available and required areas shown in the nozzle details dialog for a nozzle on a dished cover were not always correct. This was caused from an incorrect diameter used in the intermediate design dialog calculation. The final reported values were not affected. [7466]
Nozzle pad default width
The default nozzle pad width (Set Mode\Nozzles 2 dialog) is now saved with the program defaults. The value will now be used as the initial nozzle pad width for any new files. Previously the value only applied to the current file. [6574]
Nozzle reinforcement deficiency reported when not necessary
In some rare instances, a deficiency was reported indicating that the nozzle reinforcement was not adequate for the iterated maximum pressure. Increased numerical precision is now used to prevent the erroneous deficiency. [7465]
Nozzle report in SI and MKS units
A metric conversion factor from mm² to cm² is now present for all of the UG-37 area detailed results. [7611]
Nozzle UG-41 weld path failure issue
In rare cases, the message "The nozzle calculations have iterated more than 100 times. Contact Codeware for assistance." was reported in the nozzle dialog. This occurred when a nozzle required a reinforcing pad fillet weld greater than the pad thickness due to the UG-41 weld path failure analysis. Now, the required pad fillet weld leg is limited to the pad thickness and a deficiency is reported if the weld path check fails. [7473]
Pressure iteration for nozzle on a welded cover
When a nozzle is attached to a welded cover that utilizes a certain weld configuration dependent on m = t_r / t_s, it was possible that the required thickness of the welded cover's parent component limited the MAWP used in the design calculations of the nozzle. A discrepancy between the pressure summary and the nozzle report MAWP occurred as a result of this limitation, but this did not affect the chamber MAWP. [7507]
Project Toolbar file names displayed in lower case
After files were added to a project, the next time the project was loaded the file names were displayed in lower case. This was a change within the Project Toolbar itself and did not alter the actual file names. This issue has been retroactively corrected for older projects as well. [7510]
Reduced ASME B16.5 flange pressure rating
When the option switch Consider external loadings on flange MAWP rating was active and either ASCE 7-98, 7-02, 7-05 or IBC 2000, 2003, 2005 was specified, the reduced ASME B16.5/B16.47 pressure rating reported in the flange dialog and the Pressure Summary did not include consideration of the 0.6 weight factor per ASCE load cases 7 and 8. [7569]
Rigging Analysis stress graph with conical skirts
The Rigging Analysis stress graph is now calculated and drawn correctly for vessels with conical skirts. [7535]
Saddle located under a transition
The saddle report used an incorrect Vessel Radius when the saddle was located under a transition. A deficiency is always issued stating that calculations may not be accurate when a saddle is located under a transition. [7596]
Seismic component response factor limit - Saddle design
In the saddle report for NBC 2005 seismic design, the report now clarifies that the Component Response Factor, S_p is limited to a maximum of 4.0 per paragraph 4.1.8.17. [7521]
Studding outlet type 12 no external projection
COMPRESS now permits a type 12 stud pad nozzle to be flush with the outside surface of the vessel. The reinforcement height, te, per Fig. UG-40 (a-2) is zero for this case. This results in A5 = 0 for UG-37. [7643]
The Export to Drafter function was automatically activated
Every time the Set Mode Options dialog was opened, the Export to Drafter option was automatically activated. This caused an additional Drafter file with a .dpf extension to be saved every time a COMPRESS file was saved. [7469]
Transition - Rated pressure in required thickness plus external loads table
In the rating mode, the pressure value was not reported for the top seismic load case in the Thickness Required Due to Press + External Loads. [7470]
Transition details dialog - t(ext. loads) value
The t(ext. loads) value shown on the transition details dialog was always zero. This was only a display error and did not affect the calculations. [7597]
Transition juncture integral reinforcement
If a Division 2 vessel has a transition with integral reinforcement and it is converted to a Division 1 vessel, the inputs for integral reinforcement were still available in the transition dialog. Division 1 does not consider integral reinforcement at transition junctures. These inputs are now hidden for Division 1. [7600]
Transition MAEP in rating mode
The MAEP calculated for a transition in rating mode may have incorrectly been limited to the external design pressure due to an option Use Design P and Design Pe only available in the design mode. This occurred if this option was activated in design mode and then the file was changed to rating mode. In this case, the setting was maintained and the MAEP was limited to the external design pressure. [7464]
Trunnion lift lugs - hole offset
A sanity check has been added for trunnion lift lugs to ensure the lift pin hole is external to the trunnion pipe. [7615]
UCS-66 MDMT rating for SA-738 B
The deficiency, "Figure UCS-66 limits SA-738 Gr B to -20 0F", is no longer reported when impact testing is specified for SA-738 B. [7453]
UG-29 stiffening ring moment of inertia - Metric reporting error
For metric units, a metric conversion factor is now included in the UG-29 moment of inertia calculation. Previously, the numerical values did not equate to the final answer. This was a reporting issue only and did not affect the final result. [7552]
UG-32(l) check - Required straight flange length
The requirements for UG-32(l) have been changed to use the straight flange nominal thickness for the t_h value in Fig. UW-13.1. Previously, the head minimum thickness was used. [6778]
User defined bolt material message during file load
When a file was loaded that contained a flange with a user defined bolt material, a message was displayed stating that the bolt material for that particular flange had been changed to same user defined bolt saved in the file. For example, during loading of the file, a message such as "The bolt material for Flange #3 was changed to Test (user defined)" was displayed in the Vessel File Load Assumptions dialog. This did not affect the model or calculations. [7581]
Web plate buckling check equation typo - Saddle report
The web plate buckling check equations in the saddle report had typographical errors in the formulas for S_c and F_b where t_w was used instead of t_s. This has been corrected per page 251 and 252 in 'Mechanical Design of Process Systems' by Keith Escoe. This is a typographical issue and does not affect the final results. [7540]
Weld strength calculation for Appendix 1-10 large openings
For large openings analyzed per Appendix 1-10, the groove weld t_w1 is now reduced by the parent component's pipe tolerance when calculating the average shear stress in the weld. [7452]
Welded cover circumferential seam radiography
The circumferential seam radiography section of the welded cover dialog is now hidden for welded covers with out butt joints because it is not applicable. Previously, the inputs for the welded cover circumferential seam radiography were not handled correctly and the radiography was reset to Full UW-11(a) Type 1 every time that the welded cover was edited. The circumferential seam radiography is now reported as N/A in the cylinder report for seams between adjoining welded covers. [7549]
WRC calculation for tail lugs
For tail lugs attached to skirts or base rings the shell mean radius and thickness were not set correctly for the WRC analysis. This affects the Rm / t ratio. [7543]
WRC-107 - Solve function error
In the WRC 107 Design dialog, the Solve function was not functioning properly in which it was working in terms of lb-ft rather than in terms of lb-in.. This is a dialog functionality issue only and does not affect the calculations. [7524]

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Build 6261 changes

New Features

ASME B16.47 Series A and Series B Flanges
The ability to specify between ASME B16.47 Series A and Series B flanges is now available. This feature will affect the physical geometry of B16.47 flanges in older files. [4446]
Ambient temperature input
COMPRESS now includes an ambient temperature input value. This value is located on the Set Mode -> Defaults page. The ambient temperature is used for the Empty design conditions. Previously the Empty design conditions used the test temperature when determining material properties. [5862]
UG-40 Limits of reinforcement
The "Limits of Reinforcement per UG-40" section of the Nozzle report now shows the limit of reinforcement calculations, both normal and parallel to the vessel wall. This was a reporting change only. [7093]
Vessel name and file name in the headers / footers of the PDF reports
New options have been added to the PDF Report Options dialog to use the vessel name or the file name in the header or footer of the PDF reports. [7412]
Appendix 1-10 option for nozzle calculation
The option switch to use Appendix 1-10 for large openings is no longer visible on the Nozzle Calculation Option dialog for addenda previous to 2007. This switch was visible but deactivated in previous builds. [7447]
Appendix 2 effective gasket seating width - Metric conversion factor
For metric units, the Appendix 2 effective gasket seating width calculation has been adjusted to account for the small difference in the rounded metric factor C_b of 2.5. The formula is also now reported with the 2.5 factor in the equation. [7360]
Clip / lug WRC warning
The WRC message Actual lug C1/C2 < 1/4, C1/C2 = 1/4 used as this is the minimum ratio covered by WRC 107. has been changed from an error to a warning. [7362]
New message box that indicates missing project files
A new message box has been added that alerts the user if any project files are missing when a project is loaded. [7373]
Rigging Analysis Preview dialog - Maximum shear
The Rigging Analysis Preview dialog now displays a numeric value for the shear diagram maximum. [7327]
Saddle uplift warning
A warning is now reported in the Deficiency Summary when uplift occurs at either of the saddle locations. For example, the warning states, "The right saddle is subject to uplift. The Zick analysis may not be valid in this case, nor does COMPRESS investigate uplift on the saddle and anchor bolts. Further investigation is required, or relocate saddle(s) to eliminate the uplift. (warning)" [7438]
Set Mode - Defaults 2 page
A new page has been added to the Set Mode options dialog (F7). The new page is called Defaults 2 and replaces the Platform Defaults page. The new page currently includes the platform default values as well as report default settings. [7393]

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Bug Fixes

Circumferential RT setting - ASME B16.5/16.47 flange
A circumferential RT setting is now available on the ASME B16.5 / 16.47 flange dialog when a weld neck flange is attached to the left (top) end of a head. This enables the RT setting to be set for the circumferential seam. Previously the RT value from the preceding cylinder was used for this joint. [7411]
MDMT for ASME B16.5/16.47 flanges
UHA-51(g) is now considered when determining the MDMT for ASME B16.5/16.47 flanges. [7390]
Minimum test pressure
COMPRESS now includes a check on the test pressure to ensure it meets the minimum requirement of UG-99(b) or UG-100(b). If the test pressure basis was set to UG-99 c) it was possible that the calculated test pressure would be less than the requirement in UG-99(b). An error is reported if the calculated test pressure does not meet the minimum requirement. [7399]
Nozzle reinforcement from ASME B16.5 weld neck flange
Area available for nozzle reinforcement no longer includes any area from an ASME B16.5 weld neck flange. Previously an option switch was available to exclude this area. The option switch Exclude the ASME B16.5/16.47 flange body from contributing to nozzle reinforcement on the Nozzle Calculation Options dialog and the ASME B16.5 dialog has been removed. [7400]
Appendix 2 hydrotest calculation error
For Appendix 2 flanges with external pressure and a corrosion allowance specified, the hydrotest stress reported in the Hydrostatic Test report was overly conservative. This issue was isolated to Build 6260. [7352]
Updated Barrel O.D. for ASME B16.5 Heavy Barrel Class 400 Flanges
The Barrel O.D. for ASME B16.5 Class 400 HB Flanges has been updated to be consistent with the online Forged Vessel Connections (FVC) catalog. Previously, COMPRESS used the Barrel O.D. values from an older FVC catalog. [7431]
Thick wall cylinder equations
For corroded cylinders that have dimensions near the App. 1-2 thick wall cylinder requirements COMPRESS was incorrectly using the thick wall cylinder equations for the required thickness and MAWP but reporting the App. 1-1 equations. This affected builds 6259 and 6260. [7369]
Appendix 1-10 limit of reinforcement normal to inside surface
In the calculation of the limit of reinforcement along the nozzle wall projecting inside the vessel surface (L_I), the vessel's internal corrosion was not properly removed from the nozzle's nominal thickness. [7451]
Additional Nozzles table for the ASME U-4 form
The column label Nozzle Thickness in the Additional Nozzles table for the ASME U-4 form attached to an ASME U-1A form has been changed to Nominal Thickness in order to be consistent with the ASME U-1A form. [7389]
Appendix 2 Flange - flange length error
The minimum flange length for a weld neck integral flange was not using the correct minimum requirement of 0.25 * g₁ when g₁ and g₀ were equal. [7382]
ASME B16.5/B16.47 Flange - Index out of bounds of array error
For metric units if an unusually high default temperature was input into the Set Mode\Defaults dialog, it was possible for the error Index was out of the bounds of the array to be displayed when editing an ASME B16.5/B16.47 flange. A work around was to reduce the default temperature in the Set Mode\Defaults dialog. [7415]
ASME B16.5/B16.47 flange limits hydrotest pressure calculated per UG-99(c)
In the determination of the hydrotest pressure per UG-99(c), an ASME B16.5/B16.47 flange rating is now allowed to limit the hydrotest pressure determination. Previously, the hydrotest pressure was determined excluding the flange rating, and an error was reported if the hydrotest pressure exceeded the flange hydrotest pressure permitted per ASME B16.5/16.47. [7450]
ASME B16.5/B16.47 MDMT deficiency
Additional tolerances are now included in comparison checks in order to prevent erroneous deficiencies such as, ASME B16.5: Flange MDMT is only -290C: -290C is required. This problem was isolated to Build 6260 and was the result of a floating point precision issue. [7402]
Base ring strut error
The error deficiency "A stiffener beam is required to prevent the base ring section from being over stressed from tail lug loading" was reported for the case where a stiffener beam has been added and is not overstressed. This has been changed to a warning message to alert the user that the calculations are based on a reinforcing stiffener beam. [7425]
Base ring strut reported for tail lug
If a tailing lug included a strut and was originally attached to a skirt or skirt base ring, the strut information continued to be included in the tail lug report when the lug was moved to a main vessel component where a strut was not applicable. [7416]
Blank Data Report Item Remark rows on ASME U-4 forms
When editing an ASME form, if multiple Data Report Item Remark rows were added to the ASME U-4 form and one was left completely blank, the PDF version of the form did not display any of the subsequent Data Report Item Remark rows. Once a blank row was inserted in the middle of this table, additional rows could not be added unless the subsequent rows were deleted. Blank Data Report Item Remark rows may now entered and displayed on the ASME U-4 form. [7372]
Cone extreme fiber elongation check
For cones specified by outer diameter when the slope of the cone angle resulted in a negative inner diameter, the message "Value was either too large or too small for a Decimal" was issued. An additional sanity check is now performed and an error deficiency is reported. A work around in Build 6260 was to correct the geometry by inputting the cone by inner diameter. [7403]
Cone juncture allowable stress
The yield stress value was not being considered in the determination of the allowable stress Sps. Sps was always being based on allowable stress, S. The 2*Sy value from UG-23(e) was not being considered. [7445]
Cone juncture reports in metric units
In the Appendix 1-5 and Appendix 1-8 report, the equations for the axial loads f₁ and f₂ have been modified to remove the US Customary moment conversion factor of 12. Previously, the equation included the factor to convert the moment from lbf-ft to lbf-in. For metric units, the moment reported was divided by 12 in order for the equation to evaluate to the correct final answer. Note that this change did not affect the final axial load result. [7419]
Crash when clicking Tube Layout button
If a required control was not properly registered then COMPRESS would crash when selecting the Tube Layout option or generating the general arrangement drawing. COMPRESS now tries to register the control and if it is unsuccessful the user is informed to register the control manually. [7370]
Crash when creating a new vessel
In rare cases, COMPRESS crashed when creating a new vessel. This was due to a problem with the vessel defaults in the registry, which has been corrected. [7348]
Cylinder dimension dialog - number to add
The input for Number to add on the cylinder dimension dialog is no longer included in the trial length section of the dialog. [7365]
Cylinder report - thick shell formula
The calculation for Z in the thick wall cylinder equation (App 1-2) did not show numeric values. The equation contained symbols such as %%Irad%%. This issue was isolated to Build 6260. [7387]
Design temperature for empty condition
The design temperature for the empty condition for cylinders, transitions and hemi heads has been changed to use the new ambient temperature input value. [7392]
Expansion joint exemption reference
An exemption from UG-27 calculations has been corrected where the reference to Appendix 5-3(g) was used instead of Appendix 5-3(f) for Code editions 2004 and later. [7081]
External MAWP on ASME U-Forms when no vacuum condition was specified
The External MAWP that was automatically filled in for ASME U-Forms was incorrectly set to an unrealistically high pressure when no vacuum condition was specified for the respective chamber. [7386]
Incorrect areas shown in nozzle dialog
Under rare circumstances when a nozzle was exempt from area replacement calculations for external pressure and not exempt for internal pressure calculations the Area available and required shown in the dialog status bar was incorrect. [7443]
Large opening calculated per Division 2 Part 4.5 - Opening limitation check
For a large opening analyzed per Division 2 Part 4.5, the applicability check performed to ensure that the ratio of the major axis diameter to the minor axis diameter of the finished opening is less than or equal to 1.5 incorrectly used the minor axis radius. This may have resulted in an erroneous deficiency. [7378]
Leg Bracing Summary report
For metric units, the total shear reported in the Leg Bracing Summary table under the column Loading was reported incorrectly. This was a reporting issue only. [7432]
MAWP displayed on ASME B16.5/16.47 body flange dialog
When editing or creating a new ASME B16.5/16.47 body flange, the MAWP displayed on the Select ASME B16.5/16.47 Flange dialog was not updated when the flange location was changed. When creating a new flange, the MAWP was initially calculated using the full static liquid head. This did not affect the calculations in the report. [7427]
Metric area dimensions in nozzle dimension dialog
The SI units for area available and area required shown in the bottom of the nozzle dimension dialog have been corrected to use cm². In build 6260 units of m² were shown. [7349]
New Appendix 2 flanges with the Automatically Copy Last option
If the Automatically Copy Last option on the Environment page of the Set Mode Options dialog was active, the values on the initial Flange dialog were not retained while creating a new Appendix 2 flange. Instead these values were set to match the last component. [7338]
Notes button in Appendix 2 dialog
The message that is displayed when clicking on the Notes button in the second Appendix 2 dialog would only display values for US Customary units even if the vessel was in metric units. The message now displays the values in the appropriate units. [7287]
Nozzle attached to another nozzle - Erroneous deficiency
For a nozzle attached to a nozzle, the parent nozzle's required thickness t_r is now always calculated using the inner diameter equation. This change was made as in some circumstances when the parent nozzle was specified by outer diameter, the deficiency, "Required thickness tr for the input nozzle pressure exceeds the component wall thickness" would be reported. [7361]
Nozzle details dialog status bar when running the Korean version of Windows
When running the Korean version of Windows, the status bar at the bottom of the dialog did not display the available and required areas correctly. The status bar displayed "Area available: m? Required: m" instead of the correct values. This did not effect any calculations. [7410]
Nozzle WRC 107 values
The input values for a nozzle WRC 107 analysis were being updated when the user canceled out of the dialog. This would result in incorrect values for the WRC 107 analysis if wrong values had been input and then the user canceled from the dialog. [7430]
Overall length on general arrangement drawing
In case of a vessel with open ended body flanges, the overall length of vessel in the general arrangement drawing did not extend all the way to the face of the top flange. This error occurred only if the top body flange was created before the bottom body flange. [7377]
Parent O.D. on Support Skirt Dimensions dialog
When creating a new support skirt, the Support Skirt Dimensions dialog indicated that the O.D of the component that the skirt was attached to was 0 if a bottom head was initially selected. [7394]
Position of hillside nozzles on ellipsoidal heads in the 3D model
In the 3D model, hillside nozzles on ellipsoidal heads did not extend all the way to the Offset (L) that was specified on the nozzle dialog. This error was only apparent with a large head thickness and had a very small effect on calculations when the nozzle governed the height of the static liquid head. [7371]
Pressure summary for isolated spherically dished cover
When a spherically dished cover was designed in isolation and the Calculate MAWP option on the Calculation page of the Set Mode Options dialog was not active, the Pressure Summary displayed the chamber rated MDMT at an unrealistically high pressure. This error did not affect any other area of the report. [7421]
Rigging Analysis - Ballerina skirt weight
Ballerina-type skirts are now properly accounted for in the Rigging Analysis as point shear and moment loads, instead of the formerly distributed load. Note that a skirt is considered a ballerina-type only if main vessel components extend below the lowest elevation of the skirt. [7324]
Rigging Analysis - Support Skirt with a Tailing Lug
The weight of a tailing lug on a skirt is no longer accounted for twice in the weight and center of gravity calculations for the Rigging Analysis. [7326]
Studding outlet projection
Studding outlet nozzles reported an incorrect value for Lpr. The reported value included the raised face height. Also, for Type 12 nozzles the Stud Pad Thickness value in the dialog was increased by the raised face height. [7442]
Transition lining weight included in empty condition
The weight of lining on a transition was included in the empty weight even though this condition was not checked as active for the lining. [7433]
Type 4 nozzles - full penetration weld size
The upper and lower groove weld size are now updated in the dialog when the Groove Welds are Full Penetration switch is selected. Previously these values were not updated until the dialog was closed. [7366]
UG-116(e) RT marking
The required radiography marking reported in the setting summary report may have been incorrect for vessels which included welded covers with corner joints. These joints do not have a circumferential seam and should not be considered in the determination of the vessel RT marking. [7404]
Warning when user specified limit of reinforcement used
COMPRESS issued a warning when a nozzles user specified limit of reinforcement was larger than the calculated limit of reinforcement, causing the limit of reinforcement to fall off of the parent component and on to a thinner or different type of component. [7446]
Wind code - empty condition temperature
The temperature used for the empty condition in the wind code calculations is now the ambient temperature instead of the test temperature. This can affect the modulus of elasticity for the empty condition if the test temperature is not equal to the ambient temperature. Note that there is now an input for ambient temperature on the Set Mode -> Defaults page. In build 6260, the ambient temperature was set to 700F. [6807]
Wind Code Report for vessels with no external pressure
The Wind Code Report no longer reports Fundamental Frequency and Damping Coefficient values for the Vacuum, Corroded case when the vessel has no external pressure specified. [6865]
XML reporting for ASME B16.5 flange material
The material reported for an ASME B16.5 nozzleFlange may have been incorrect. A default material may have been reported instead of the correct flange material. [7414]

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Build 6260 changes

New Features

Appendix 2 Flange - Confined Gasket Flange Facing
A new Appendix 2 flange facing type has been added for all applicable flanges (excluding full face gasketed, split loose, and lap joint flanges), but primarily for tubesheet flanges. The new facing type has a confined gasket facing design. The new flange facing will have the same effective gasket width calculations as flange facing sketch 1(a) right and 1(b) left in Appendix 2, Table 2-5.2. The new flange facing design will not affect any of the flange stress calculations, but will affect the flange geometry which may affect overall vessel length. [5732]
Appendix 2 Flange - Raised Face
COMPRESS now includes the ability to specify a raised face diameter and height for applicable Appendix 2 flanges. This option is available if a Sketch 1a Right, Sketch 1b Left, or Confined Gasket (Raised Face) facing sketch is specified. The raised face option is not available and does not apply to full face gasket or lap joint type flanges. [5734]
Appendix 2 Flange new Fig. 2-4 types
COMPRESS now provides an option to select the flange type from Appendix 2 Figure 2-4 (1) through (10), excluding (6a) and (6b). This adds flange types (9), (9a), (10) and (10a) as well as the new (4b) and (4c) types for the A08 addenda. [7220]
Appendix 2-5(e) - Full available bolt load consideration
Per the note in Appendix 2-5(e), the full available bolt load A_bS_a may be used where additional safety against abuse is desired. To enforce this in the flange design, activate the new option switch Appendix 2-5(e) Full Available Bolt Load in the flange dialog. [6718]
ASME B16.5 2003 metric pressure ratings
The ASME B16.5 2003 metric pressure ratings are now used for standard flanges for SI or MKS units. Previously, the US Customary pressure ratings converted to metric were utilized when designing ASME B16.5 standard flanges. [6573]
ASME Section VIII, Division 1 2008 Addenda
COMPRESS has been updated to include the 2008 Addenda of the ASME Code. The following additions and changes were made to COMPRESS:

(1) The materials database now includes all ASME Section II, Part D 2008 Addenda data for both Customary and Metric editions. This includes all materials from Tables 1A, 1B and 3. In addition, Table U (tensile strength), Table Y-1 (yield strength), Tables TE-1 through TE-5 (thermal expansion coefficients), Tables TM-1 through TM-5 (elastic moduli) and all vacuum charts have been updated.

(2) UG-120(e): Bolted covers and their attaching bolting are now listed in the Remarks section of the Manufacturer’s Data Report or on an attached Form U-4. The ability to specify the nut material and bolt thread designation is now present in the forms generation dialog.

(3) UW-16(g)(2): Bolting pads may now be attached to vessels by a fillet weld deposited on the outside only provided the limitations in UW-16(g)(2) are met. When the limitations are met, COMPRESS will show a lower groove minimum of zero for a Type 12 bolting pad and lower fillet weld of zero for a Type 11 bolting pad. If a zero is input for the respective weld, then the fillet weld deposited on the outside of the vessel is sized per UW-16(g)(2)(c). Note that for a Type 11 bolting pad, the shell opening diameter in the corroded condition must be less than or equal to the outside pipe diameter of the NPS associated with the bolting pad selected.

(4) Table UCS-23: The new plate material SA/GB 6654 16MnR is now available.

(5) Table UNF-23.3: New materials with UNS numbers N06210, N10665, and N05500 are now available.

(6) Table UHA-23: The new plate material SA/EN 10028-7 is now available. Per Table UHA-23 notes (1) and (2), X5 CrNi 18-10 and X5 CrNiMo 17-22-22 are treated as Type 309 and 316 respectively for the rules of Part UHA. In COMPRESS this affects both the UHA-44 fiber elongation and UHA-51 MDMT checks.

(7) Table UHA-44: For Grades 201-1, 201-2, and 204, the maximum strain limits and minimum heat treatment temperature are now included in the extreme fiber elongation check.

(8) Appendix 1-9: The new Appendix 1-9 alternative reinforcement rules are now available as a substitute to UG-37. Note that the Appendix 1-9 rules list a set of specific conditions for the range of applicable. For example, the rules are only applicable for radial nozzles in cylindrical and conical shells subjected to internal pressure. If any of the conditions of applicability are not met, COMPRESS will revert back to the UG-37 reinforcement rules and issue a warning in the Deficiencies Summary. Activation of the alternative reinforcement rules is accomplished in COMPRESS by selecting the option switch Use Appendix 1-9 in lieu of UG-37 located in the nozzle dialog under the Calculation Options push-button.

(9) Appendix 1-10(b)(3): These errata corrections to the Appendix 1-10 analysis were included in the original release of the Appendix 1-10 calculation option in COMPRESS.

(10) Appendix 2 Figure 2-4 sketches (4b) and (4c): The new weld configurations for a ring type loose and slip on loose flange design are now available.

(11) Appendix 2 Table 2-5.1: The references to asbestos now are listed as mineral fiber in the ASME Gasket Details dialog.

(12) Appendix 2-14(a): A new option No Rigidity calculations per App. 2-14(a) is now available in the Appendix 2 flange dialog. This option allows successful service experience to be used as an alternative to the flange rigidity calculations provided the service is nonlethal and nonflammable, the design temperature range is between -20°F (-29°C) and 366°F (186°C), and the design pressure does not exceed 150 psi (1035 kPa). If this option is active and the vessel design is outside the scope of limitations, the flange rigidity calculations will be performed and a warning deficiency will be reported.

(13) Appendix 2-14(c): For reverse integral and reverse loose flanges, the nomenclature in the rigidity equations was changed to report h_0r in lieu of h₀ and L_r in lieu of L. No changes were necessary in the rigidity calculation as COMPRESS already performed the calculation correctly. [7221]
Flange rigidity calculations for MAP condition
A new option is available to perform flange rigidity calculations for the MAP condition. This option may be activated by using the Perform Appendix 2 flange rigidity calculations for the MAP condition switch on the Calculations tab of the Set Mode dialog. In addition, the calculations for the MAP condition are now reported when in rating mode. [6054]
New "Project" feature is now available
The new "Project" feature allows users to organize, view, and backup files of any type from within COMPRESS. For example, multiple COMPRESS files, supporting MS Excel spreadsheets, technical specifications, pictures, etc. can all be grouped together under one project name. All of the files grouped in the project can be directly loaded from the project dialog. [7301]
Rigging Analysis Reactivated
The Rigging Analysis, disabled in previous builds, is available again with several improvements. The analysis includes shear, moment, and bending stress diagrams which describe the vessel during horizontal lift. To add Rigging Analysis to a vessel, select the option under the Attach -> Rigging / Lift Lug menu. Features include:
-- Lift points may be synchronized with Lift Lug locations. This is automatic when a valid lift lug configuration is present, but may be overridden by checking the "User defined lift point elevations" switch in the Rigging Analysis Preview dialog. Rigging analysis may still be added to vessels with no Lift Lugs.
-- While in the Rigging Analysis Preview dialog, Lift Lugs, if present, may be directly edited through the Edit Lift Lugs button.
-- The Rigging Analysis report includes a table summarizing shear, moment, and stress values at different elevations. Entries include main vessel components, platforms, lift points, shear/moment/stress maximums, the vessel center of gravity, and, if a support skirt is present, the skirt / vessel juncture. Entries are marked on the diagrams as well.
Note: Rigging Analysis is not yet available for vessels with intermediate skirts or internal heads. [5659]
Vessel surface area
The external surface area of a vessel can now be reported in the Weight Summary report. The surface area of each main components is reported in the Vessel Elements table. The surface area of all attachments on each component is reported in the Attachments table. A total surface area is reported below the vessel weight values. The option to include the surface area in the weight summary report can be turned on or off from the Report Defaults dialog. [7154]
Appendix 1-10 analysis - Areas not contributing
The option switches that remove areas from contributing to the nozzle's reinforcement are no longer considered for a nozzle designed per Appendix 1-10. A warning is reported if any of these option switches are active. [7183]
Appendix 1-10 analysis - Full area replacement
When a large opening is analyzed per Appendix 1-10 and the Full nozzle area replacement option switch located in the Set Mode\Nozzles 1 dialog is active, a warning message is now reported indicating that full area replacement was not performed on the nozzle in question as this design method is not applicable to Appendix 1-10. [7184]
Appendix 2 flange - TEMA Table D-5
For a vessel set to metric units, the metric TEMA Table D-5 values are now used for the Appendix 2 flange minimum bolt spacing, radial distance, and edge distance checks. [7262]
Appendix 2 flange defaults
COMPRESS now provides the ability to specify defaults for Appendix 2 flanges on the Defaults tab in Set Mode Options. The user can specify default values for Flange Type, Facing Sketch, Gasket Description, Gasket Factor m, Gasket Factor y, and Gasket Thick T. [7286]
Appendix 2 flange hydrotest stress
The Appendix 2 flange hydrotest stress is now calculated and reported when the hydrotest basis is set as design P and MAP calculations are de-activated. Previously, the flange hydrotest stress was not calculated and NI was reported in the Hydrostatic Test report when the Calculate MAP (excluding nozzles) option was not active. [6797]
ASME B16.5/B16.47 bolt material - ASME page number and line number
For ASME B16.5/B16.47 body flange, the bolt material's ASME page number and line number are now reported. [7251]
ASME Interpretation VIII-1-01-37
When the ASME Interpretation VIII-1-01-37 option is active, COMPRESS no longer checks the thickness of a separate reinforcing pad to decide whether the vessel's stress ratio should be used for the nozzle. Previously, the vessel's stress ratio was used if either the vessel or pad thickness was thinner than the nozzle neck thickness. [6994]
Circumferential RT available for Appendix 2 flanges on nozzles
A circumferential RT value can now be set for an appendix 2 flange attached to a nozzle. This affects the flange hub calculation. [6942]
Context sensitive help - FEA Options dialog
Context sensitive help is now available for the FEA Options dialog. [7333]
Elliptical manway deficiency
For an elliptical manway on a formed head when the limit of reinforcement along the short chord extends beyond the head's spherical limit, the deficiency stating the short chord plane required additional analysis is no longer reported when the long chord limit of reinforcement also extends beyond the head's spherical limit. In this case, the long chord will always govern the reinforcement calculation. [7175]
Elliptical manways on general arrangement drawing.
COMPRESS now generates correct drawing for an elliptical manway on general arrangement drawing. [7159]
Error reported for lethal service on cone angles greater than 30 degrees
For lethal service, an error is now reported in the Deficiency Summary for transitions with half apex angles greater than 30 degrees. For cone angles greater than 30 degrees, the circumferential joint is classified as an angle joint, Type No. (12). UW-2(a)(1)(b) requires all category B joints to be of Type No. (1) or No. (2). For this case, a knuckle and flare are required. [6283]
Formed heads - MDMT coincident stress ratio
In the calculation of the MDMT coincident stress ratio for formed heads, the reduction in allowable stress specified in UG-32(e) and Appendix 1-4 footnote 1 is no longer applied. This reduction is applied due to buckling concerns in the knuckle region. For the MDMT considerations, only primary membrane tensile stress should be evaluated. [7165]
Help Menu and Key Information Dialog updates
Under the Help menu, the About COMPRESS dialog was reorganized and a View License Agreement button was added. The Help menu now includes a Contact Information dialog, which contains helpful Codeware web links, email addresses, and phone numbers. In addition, the Network Key Usage option has been moved from the Action menu to the Help menu, and renamed Key Information. This option is now enabled for local key COMPRESS configurations and will display the key number and SUS expiration date. For network key COMPRESS configurations, the dialog now reports the SUS expiration date as well. [7167]
Large openings calculated per Division 2 Part 4.5
A note is now added in the detailed nozzle report when the Division 2 Part 4.4 rules are used in lieu of the Appendix 1-7 or Appendix 1-10 rules. The Division 2 Part 4.5 rules are performed as a U-2(g) analysis when the nozzle in question falls outside the limitations of the Appendix 1-7 and/or Appendix 1-10 rules. Note that the Division 2 Part 4.5 rules are the basis for the Appendix 1-10 rules. Previously, a warning was reported in the Deficiencies Summary explaining why the Division 2 Part 4.5 rules were used, but this could be overlooked when the option to omit warnings is active. [7277]
Material thickness limitation on vacuum charts
A new warning is reported if a material thickness is outside of a vacuum chart's acceptable thickness range. This warning applies to vacuum charts HT-1, CS-4, NFA-12, NFA-13 and NFN-19. [7219]
Maximum temperature limit deficiency for bolt materials
When the temperature of a flange exceeded the maximum temperature limit for its bolt material specified in ASME Section II Part D, COMPRESS did not report a deficiency if the temperature was not outside the temperature range for allowable stresses. [7285]
Minimum number of support lugs
COMPRESS now forces a minimum of two (2) support lugs on a vessel. Previously one support lug could be specified, but lug calculations were not performed and an error deficiency was reported. [6912]
New option to invert the mouse wheel zooming
A new switch has been added to the Environment page of the Mode Options dialog that allows the mouse wheel zooming direction to be inverted. [7292]
Nozzle 'Areas' dialog
The Nozzle Areas dialog has been renamed to Nozzle Calculation Options. [7158]
Support lug base plate thickness calculation
In the support lug base plate required thickness calculation, the bending moment in the radial direction (M_y) is now considered. Traditionally, the moment in this direction was assumed to not govern due to the additional stiffness provided by the lug gusset plates. [5697]
Vacuum chart temperature limit warning
For material vacuum charts that reference note (4) of subpart 3, a warning is now reported if the design temperature exceeds the temperature limit. [7218]
WRC-107 option for a tailing lug close to a skirt base ring
If a lift lug is attached to a skirt base ring or on a skirt close to a skirt base ring, COMPRESS now allows the WRC-107 analysis. An error message is reported for this case stating that the local stresses may be overly conservative as the stiffness of the base ring is not considered in the local stress analysis. A new option None is now also available to deactivate the local stress analysis when the designer opts to perform a detailed stress analysis outside of COMPRESS. [7308]
WRC-107 option for lift lugs on heads
If a lift lug is attached to a head, a WRC-107 analysis is not permitted as rectangular attachments to spherical shells are outside the scope of WRC-107. When a head is selected as the lug's parent component the WRC-107 radio button is now disabled. Previously, the WRC-107 analysis could not be selected, but the option button was not disabled. [7252]

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Bug Fixes

Elliptical manway on cylinder calculation error
For an integrally reinforced elliptical manway in a cylinder with the short chord parallel to the longitudinal axis of the vessel and the Groove Welds are Full Penetration option switch active, the short chord was incorrectly used in the UG-37 t_rn and UG-45(a) calculations. [7226]
3D model of elliptical manway attached to head
When an elliptical manway was located on a right or bottom head, the orientation of the major axis was not depicted correctly in the 3D model if the Angle (Theta), specified on the Nozzle dialog, was not set to 0 degrees or a multiple of 90 degrees. [7214]
Appendix 1-10 - Integrally reinforced nozzles
For large integrally reinforced nozzles (i.e. nozzles with full penetration groove welds and no reinforcing pad) calculated per Appendix 1-10, the UG-37 calculation check performed in the plane parallel with the shell's longitudinal axis was not properly deactivated. This conservative error could result in COMPRESS requiring more reinforcement than required and/or reduced maximum pressure ratings. This would only occur if the plane parallel to the shell's longitudinal axis governed per the UG-37 rules. [7283]
Appendix 1-10 nozzle calculation P_L value
When using the appendix 1-10 analysis for a normal or parallel nozzle located on a transition, the maximum local primary membrane stress (P_L) value shown in the nozzle detail dialog was not correct. The slight discrepancy was due to an approximated diameter for the transition at the nozzle elevation. [7228]
Appendix 1-10 reporting error
For a large opening designed per Appendix 1-10 when the nozzle is de-rated below the design pressure, the P_L stress reported in the summary table and the UG-45(a) nozzle neck design thickness were incorrectly reported at the design pressure instead of the de-rated pressure. [7227]
Appendix 2 flange - Excessive liquid weight used in calculation
For a vertical vessel with a liquid level above the support point and an Appendix 2 flange below the support point, the calculation performed during the detailed design of the Appendix 2 body flange may have been overly conservative due to an excessive weight from the specified liquid level. This issue occurred in the calculation performed while in the flange dialog and typically would only govern a flange calculation for very large vessels. A work around was to change to the rating mode, input the desired flange geometry, and then change back to the design mode. [7302]
Appendix 2 flange - Impact testing enforced for castings
For an Appendix 2 flanges made of one of the casting materials specifically listed in Figure UCS-66 notes (1) and (2), impact testing was automatically enforced when not required. [7244]
Appendix 2 flange - Minimum straight flange requirement
For weld neck flanges if the hub slope was exactly equal to 1:3, a floating point precision issue sometimes incorrectly enforced the minimum straight flange requirement of 1.5 times g_o. This was more prevalent when using metric units. [7169]
Appendix 2 flange - Shell thickness check
When a value of zero was entered as the Shell Thickness, ts on the Appendix 2 flange dimension dialog, a repetitive error message was displayed stating that there was an internal error. This was only possible when the flange was created in isolation or was attached to an invalid component. A check has been added to the Appendix 2 flange dimension dialog to prevent this. [7330]
Appendix 2 flange calculation
In Build 6259, an Appendix 2 flange calculation issue was possible if the option switch Constructed as per Fig. 2-4 sketch 4 was activated and then the flange was changed to a type where the option switch was not applicable. In this case, the option switch is now hidden but still active. A work around is to change the flange type to a Ring Type Loose, deactivate the option switch, and then change the flange back to the desired type. [7186]
Appendix 2 flange hub - static head
The report for an appendix 2 flange hub did not report the static head value. The report showed "Static liquid head: Not Considered". This was a reporting issue only. The correct static head was included in the calculations. [7235]
Appendix 2 flange rigidity calculations for full face gaskets
The rigidity factor K_L for full face gasket type flanges is no longer enforced to be 0.2. A user input value between 0 and 1.0 can now be used for this factor. [6946]
Appendix 2 reverse flange deficiency
The Appendix 2-13(a) deficiency issued when K > 2 was incorrectly reported for any flange type. This deficiency is now restricted to reverse flange types only. [7334]
ASME B16.5/16.47 bolt MDMT check
For ASME B16.5 or B16.47 high alloy bolting materials, the Division 2 MDMT requirements were incorrectly applied. This issue was isolated to Build 6259. [7181]
COMPRESS error for a shared client user with no administrative rights.
When a user with no administrative rights starts COMPRESS shared client, an error message comes up stating that hardware key cannot be found on your local computer. A shared client is configured to run on a network key which does not require a hardware key on a local computer. [7195]
COMPRESS error for a standard user with no administrative rights.
When COMPRESS build 6252 or earlier is updated to a newer build, some users with no administrative rights get an error message. This happens only if the setup type selected at the time of installing the older build did not match with the setup type selected at the time of installing the new build. [7191]
COMPRESS error for vessel names with special characters.
A problem has been corrected that resulted in an error message when loading a file and then a crash when the Perform Code Calculations (F3) option was selected. This occurred only if the general arrangement drawing was active for the design file and if the vessel name used in the report (Action\Reports\Set Vessel Name) contained special characters such as \, *, etc. [7196]
Copy last uses wrong diameter
When the Copy Last feature is active and a cylinder is added after a transition, the previous cylinder's diameter was used instead of the transition's diameter. [7223]
Crash due to invalid studding outlet bolt material
COMPRESS crashed during calculations in certain rare cases after a nozzle was changed to a studding outlet if the bolt material was never specified. [7198]
Crash on F3 for vertical vessels in rating mode with seismic
COMPRESS would crash if rating mode was used for a vertical vessel which had a support on a cylinder and had seismic loading applied but no wind loading. A work around was to add a user defined wind load with a very small wind pressure. This was isolated to Build 6259. [7215]
Crash when opening a file that requires a test condition
COMPRESS crashed while opening a file that required a test condition if the user selected “yes” when prompted to specify a hydrotest condition. Note that in the design mode, activation of a hydrotest is required. [7208]
Crash when using SB-247 T6 A96061 with ASME 1995 edition code
COMPRESS crashed while designing a component using the ASME 1995 Edition code if the material SB-247 T6 A96061 was selected and the thickness of the component designed did not fall within the material thickness range. [7239]
Crash while importing .VSL files
COMPRESS crashed in some rare cases while importing .VSL files. [7174]
Cylinder external pressure reporting error
When D_o / t < 10, the correct results for were not reported for the allowable stress S₂ and S in the UG-28(c) section. This was a reporting error only and was isolated to Build 6259. [7265]
Deleting or editing user defined bolts
In some cases, user defined bolts could not be edited or deleted once they were added to the database. This issue occurred in Builds 6258 and 6259 when the full installation was used and the option not to use an existing user defined materials database was chosen. [7263]
Elliptical manway attached to F&D head
For an elliptical manway attached to a F&D head when the option switch Major Axis is parallel to radial axis is not active and the manway is located in the center of the head, the UG-37 area reinforcement calculations were performed as if the limits of reinforcement were outside the spherical portion of the head. This conservative error was isolated to Build 6259. [7270]
Elliptical manway extreme fiber elongation check
For elliptical manways rolled from plate, the UCS-79 extreme fiber elongation calculation now conservatively uses the smaller outside radius. [7217]
Elliptical manway with a weight of zero on a saddle supported vessel
When an elliptical nozzle with a specified weight of zero was attached to a head at the end of a horizontal vessel supported by saddles, the calculated weight on the left and right saddles changed to an unreasonably large negative value. This resulted in incorrect saddle calculations and distorted saddle dimensions. This problem was isolated to Build 6259. [7176]
Erroneous lift angle warning
For standard lift lugs on a horizontal vessel COMPRESS will display a warning in the dialog if the lift angle, beta, points away from the center of gravity. This message was erroneously displayed if the vessel datum line was located close to the center of gravity. This message could be avoided by specifying the lift lug location relative to the datum line instead of from the right seam of the parent component. [7298]
F&D head with lining
For a vertical vessel with a F&D head with lining attached, the deflection calculation was un-necessarily repeated several times slowing down the calculation time. [7172]
Flat head details dialog - MAEP
For welded and bolted covers that are not designed for external pressure the details dialog showed a MAEP value of zero. This has been corrected to show Not computed. This change was implemented in Build 6259. [7135]
Full face gasket flanges - Flange facing sketch option disabled
As flange facing sketches and facing properties such as nubbin width are not applicable to full face gasket flanges, these items are now disabled in the dialog. These settings do not affect the calculations for flanges with full face gaskets. [5443]
General Arrangement Drawing - Temperature units
In Build 6259, the temperature units in the General Arrangement Drawing were incorrectly shown as °. [7178]
Insulation dialog - Erroneous error
When adding insulation to components, it was possible that an initial value of zero would be shown for certain components. This could result in the erroneous message The following components have either support spacing 0 or support weight 0 but not both when OK is clicked on the insulation dialog. This issue was isolated to build 6259. [7168]
Lap joint flange graphical error
For lap joint flanges, a graphical error has been corrected in the three dimensional model where the flange was offset more than the lap thickness. This resulted in too large of a gap between the flange and mating flange or bolting cover, which in turn resulted in the bolts not extending to the back side of the flange. [5787]
Leg bracing report
In the leg report for Axial stress in bracing, f_a, a reporting conversion error has been corrected for metric units where the final result was incorrectly shown in force units instead of stress units. This was a reporting error only and did not affect the calculation. In addition, a reporting error was corrected where the force unit was incorrectly substituted instead of the actual force value. [7293]
Lift lug location on top heads
Lift lugs can now be located at the top of a head. Previously a geometry check prevented the lugs from being located at or close to the crown. [7190]
Lock up during nozzle external pressure calculation
COMPRESS locked up when a nozzle's parent external pressure was set to zero and the nozzle was set to use a user defined external pressure. COMPRESS no longer performs external pressure calculations for nozzles that are attached to components without an external design pressure. [6203]
Longitudinal joint efficiency when cone half apex angle is greater than 30°
If a transition has a half apex angle greater than 30° and the circumferential joint does not have a knuckle or flare, then the Category B joint type is classified as a UW-12 Type 8 (angle joint). Per UW-11(a)(5) for full radiography, a joint efficiency of 1 can not be used for the longitudinal seam (circumferential stress calculation) unless the circumferential joint (Category B) is a Type 1 or 2. For the cone and adjoining cylinder if the longitudinal seam is Full Type 1 or 2, a joint efficiency of 0.85 or 0.8 respectively is now used in the circumferential stress calculation. In addition, a deficiency is now reported if the circumferential seam is not specified as a user defined joint. [7233]
Manway weight for Coster quantity greater than 1
The weight of additional manways, specified by using Quantity for Coster greater than one, were not being included in the vessel weight. [7192]
Material change for ASME B16.5/16.47 flanges during file open
When loading a file an erroneous message could be generated for ASME B16.5/B16.47 flanges if the flange material corresponded to an ASME Section II Part D material that had a thickness range limit. This message was added to the revision history and would continue to be generated every time the file was opened. COMPRESS was attempting to determine the flange's allowable stress values for the hydrostatic test analysis; however, the hydrostatic test stress is not determined for ASME B16.5/16.47 flanges. [7188]
Message displayed when material temperature is out of range
When the material temperature was out of range for the elasticity table used, the message displayed did not show the temperature correctly. The temperature was shown as a long string of random numbers. [7206]
Mill tolerance on shell for nozzle calculation
For cylinders made from tube material, a mill tolerance of 12.5% is now included in the shell thickness (t) used in the nozzle UG-37 reinforcement calculations. [6799]
Nozzle external pressure calculations fail
The external pressure nozzle calculations could fail if the option Consider longitudinal stress in the UG-37(a) shell 'tr' calculation was active and the nozzle's parent component D_o / t ratio exceeded 1000. This calculation failure, which could occur during the maximum pressure iteration, was a result of an inability to determine an allowable compressive stress for the nozzle's parent component when D_o / t exceeded 1000. When D_o / t exceeds 1000, the allowable compressive stress is now taken at D_o / t = 1000, and a warning is reported if the nozzle's design pressure or final iterated maximum pressure falls outside the limits of the vacuum charts. [7201]
Nozzle in bolted cover
For a nozzle in a bolted cover when the option Increase t for reinforcement per UG-39(d) is active, the calculation for t_r in the nozzle detailed report now correctly includes the factor of 2 in the equation. This was a reporting error only and did not affect the final result. [7276]
Nozzle in flat cover incorrectly exempted from reinforcement calculations
A nozzle in a flat cover that exceeded one-fourth of the flat head diameter and was exempt per UG-36(c)(3)(a) was incorrectly exempted from UG-39 reinforcement calculations. [7216]
Nozzle maximum pressure calculation in rating mode
Improvements have been made to the nozzle maximum pressure iteration. When in rating mode and the nozzle reinforcement and rated MDMT were inadequate at the design pressure specified, it was possible that the maximum pressure iteration routine would fail. The result was that the nozzle report would not show the calculations at a pressure that actually limited the nozzle design. [7200]
Nozzle maximum pressure ratings
The tolerance used in the nozzle maximum pressure iteration routine has been reduced to provide closer convergence in the final results (e.g. a required area that is closer to the available area). [7231]
Nozzle on bolted cover - Flange gasket seating bolt load W
For a nozzle on a bolted cover, the flange gasket seating bolt load (W) used in the nozzle UG-37 t_r calculation was typically too conservative due to an error in the bolt allowable stress utilized. This calculation error was isolated to Build 6259. [7234]
Nozzle UCS-66.1 stress ratio
When the Through a Category A Joint option is active and the vessel stress ratio is used due to the Apply Interpretation VIII-1-01-37 (nozzle UCS-66.1 stress ratio) option, the category A joint efficiency of the nozzle's parent component is now used in the determination of the stress ratio. [5092]
Operating liquid weight in nozzles on vertical vessels
The operating liquid weight for nozzles and their closures was not properly accounted for when the liquid level was below the bottom head. This arrangement typically occurs for drains or sump heads on the vessel's bottom head. [6706]
PDF reports with an illegal character in the user defined vessel name
COMPRESS was unable to generate reports in PDF format when the user defined vessel name contained a “, /, or \ character. The user defined vessel name is set by selected using the Set Vessel Name menu item. [7209]
Physical interference with nozzles located on a straight flange
In some cases when a nozzle was located on a straight flange COMPRESS would report a deficiency stating that there was physical interference between the nozzle on the straight flange and any other nozzles in the vicinity that were attached to neighboring cylinders. COMPRESS also issued a warning stating that the limits of reinforcement overlapped as well. This issue only affected build 6259. [7264]
Radiography for lethal service
If an existing vessel is changed to a Lethal Service then the radiography setting for butt joints is set to full per UW-2. Circumferential seams of joint type 1 were being set to Full Radiography Type 2, this has been corrected to Full Radiography Type 1. [7273]
Reverse loose type flange graphical error
The bolt holes for a reverse loose type flange were incorrectly drawn on the inside face of the vessel or nozzle instead of on the flange face. This is a three dimensional graphical issue only and does not affect the calculations. [5671]
Rigging Analysis -- Skirts with lining and insulation
Rigging analysis now properly handles support skirts with insulation and/or lining. Previously, the Rigging Analysis model did not include the weight of insulation supports on skirts, while the reaction force calculation did. In addition, skirt weight was calculated for the Operating case, instead of the Lift case, which resulted in the "Include in Lift Weight" insulation/lining dialog switch being ineffective. These inconsistencies resulted in Rigging Analysis diagram errors. [4807]
Rigging Analysis -- Skirts with platforms
Rigging analysis now properly accounts for the weight of platforms attached to skirts. Previously, the weight of platforms attached to skirts was included in the reaction force calculation, but not the Rigging Analysis model. [4891]
Rigging Analysis -- Vessels with skirt or leg supports
For vertical vessels with skirt supports, the Rigging Analysis now treats the portion of the main vessel overlapped by the support (such as a head) as a cantilevered load acting on the vessel at the support attachment point. For vessels with legs, the Rigging Analysis treats the legs as point loads acting at the elevation of the center of the leg attachment weld. The bending stress in the legs and local stress at the attachment to the vessel are not calculated. Previously, the shear, moment, and stress graphs incorrectly combined loading in the support with loading in the portions of overlapped components. This does not apply to vessels with ballerina-type skirts. [5258]
Skirt base ring vacuum condition after global external pressure change
After external pressure for a vessel was set to zero via the Global Change dialog, the skirt base ring report still showed calculations for the vacuum condition. A work around was to save and re-load the file, or edit a component and either proceed through the dialogs or select Cancel. [7253]
Static head for Appendix 2 flange hub calculation
For an Appendix 2 weld neck body flange attached to the top end of a cylinder in a vertical vessel, the static head used in the flange hub calculation is now taken at the lower elevation of the circumferential joint between the flange and cylinder. Previously, the static head was taken at the flange face. Note that the evaluation of the flange hub as a cylindrical section follows the Appendix 2 report section in the flange report. [7272]
USC-66 exemption curve assumptions
In determining the UCS-66 impact test exemption curve, a warning is now reported in the Deficiencies Summary if the curve assignment selected also requires tempering or water quenching. For example, if SA-182 Grade 21 is specified as normalized, COMPRESS uses Figure UCS-66 exemption curve C. But, this material must also be tempered in order to use this exemption curve; therefore, a warning is issued to alert the designer of the assumption. [7237]
USC-66 exemption curve for SA-182 Grade F21 or F22
For SA-182 Grade F21 or Grade F22, Figure UCS-66 curve C is now used when the Material Normalized option switch is active. A warning deficiency is reported that the Figure UCS-66 curve assignment is based on the assumption that the material is also tempered. [7238]
USC-66 exemption curve for SA-216
For SA-216 WCB & WCC, Fig UCS-66 curve B is now used when the thickness is less than or equal to 2 in. (50 mm) and material is produced to fine grain practice. In addition, a warning deficiency is now reported that the material is assumed to be water-quenched and tempered. Previously, Curve B was incorrectly applied for normalized instead of fine grain. [7236]
User defined structure look up failure
If a user defined structure included the character "#", then COMPRESS would not find the structure during the database lookup. This would result in COMPRESS continuing to ask if the structure should be added to the user database every time the file was opened. [7306]
Vertical hydrotest allowable stress for cylinders and cones
For a vessel with a vertical hydrotest specified and with a cylinder or cone below the vessel support point, it was possible for the allowable compressive stress to incorrectly be used as the hydrotest allowable for those components. This would only occur when the tensile stress due to weight was larger than the longitudinal pressure stress. [7212]
Vessel viewing angle after canceling out of the Set Datum dialog
In some cases, when the Set Datum dialog was opened and the Cancel button was selected, the viewing angle was flipped 180 degrees so that the opposite side of the vessel was displayed. [6870]
Weight Summary - Nozzle flange weight not reported
For nozzles attached to heads adjacent to an intermediate skirt, the Nozzles & Flanges weight in the Weight Summary report did not include the flange weight. [7180]
Weight Summary - Nozzle weight reported on intermediate skirts
For nozzles attached to heads adjacent to an intermediate skirt, the nozzle weight reported in the Weight summary was incorrectly listed on the row for the intermediate skirt instead of the head. [6411]
Weight summary - nozzles & flanges
The weight listed for nozzles & flanges in the Weight Summary Attachements table was not correct if a nozzle straddled a component seam and had a flange. [7171]
XML report - bolted cover
The attached to component for bolted cover closures is now reported as the bolted cover's body flange instead of the next main vessel component. [7339]

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Build 6259 changes

New Features

COMPRESS tabbed file view for multiple open files
A file tab feature is now available when multiple COMPRESS files are open. A tab for each open file is displayed at the bottom of the COMPRESS window. Clicking on a tab will immediately switch the view to the desired file. This feature may be activated or deactivated from the Options page of the Set Mode Options dialog. [6964]
Elliptical manways
COMPRESS now supports the design of elliptical manways. This option is available on the nozzle design dialog whenever the nozzle is specified as an Access opening. The orientation of the elliptical manway is limited to perpendicular or parallel to the longitudinal axis of the vessel. Common elliptical manway sizes can be saved using the Choose manway from list option. In addition, a user defined pressure rating and coincident temperature rating, supplied by the manufacturer, may be input. [3359]
Longitudinal loads and bolted covers
For vertical vessels, the equivalent pressure due to the weight and moment acting on the flanged joint is now included in the bolted cover bolt load determination. This affects both the bolted cover calculation and the calculation for a nozzle when attached to a bolted cover. [6314]
New MDMT rating options
Two new MDMT options are now available allowing greater flexibility in MDMT rating. It is now possible to deactivate consideration of the UCS-66.1 MDMT reduction and/or the UCS-68(c) MDMT reduction. These new option switches are located under the Codes\ASME menu. [7006]
Nozzle UG-37(a) - calculation of shell t_r
COMPRESS now includes an option to include longitudinal shell loadings in the calculation of shell required thickness tr per UG-37(a). This option is listed in the Action / Set Mode / Nozzle 1 dialog. Selecting the Consider longitudinal stress in UG-37(a) shell 'tr' calculation option will cause COMPRESS to perform additional tr calculations for windward and leeward loadings. The largest calculated tr value from circumferential stress or longitudinal loading will be used in the area calculations. [7050]
Wind report for saddle supported vessels
For horizontal vessels, the wind report now includes an echo of the wind inputs and the calculation for the wind pressure used in the saddle analysis. Previously, the wind report stated, "Wind calculations are reported in the saddle report." [4844]
ASME Materials dialog sorting improvements
The materials displayed in the ASME Materials dialog can now be sorted and reverse-sorted by each field. Previously, they could only be sorted by Nominal Composition, Spec. No., and Page No. [7035]
Knowledgebase Articles By Topic webpage link
The COMPRESS Help menu now includes a link to the Knowledgebase Articles By Topic webpage. [7126]
Add a Group of Stiffener Rings dialog - Added Spin Control
A spin control is now present in the Add a Group of Stiffener Rings dialog to specify the Number of Rings in this Group. [7039]
Alternate sketch view -external chairs dialog
COMPRESS now allows the user to click a button to change the dimensional sketch for an external chair skirt base ring. This additional sketch allows the user to distinguish between the compression plate length and width. [1522]
Appendix 1-10 check for variable thickness nozzles
For type 9 or 10 variable thickness nozzles classified as large openings per UG-36(b)(1) and analyzed per Appendix 1-10, the equations specific to variable thickness nozzles are no longer used if the same thickness is input for the heavy barrel and thin portion of the nozzle neck. [7099]
Appendix 1-10 large openings under external pressure
The Appendix 1-10 check for large openings under external pressure now takes the allowable stress for the primary local membrane stress (P_L) as 1.5 times the lesser of the allowable compressive stress per UG-23 or the allowable tensile stress. Previously, the allowable stress for the external pressure case did not include the 1.5 factor. [6954]
Appendix 2 pair of split ring flanges
COMPRESS now displays an additional split ring in the 3D graphic when Split Loose flanges "pair of split rings" option is selected. Previously, COMPRESS would one split ring even if the "pair of split rings" option was selected. [7037]
Appendix 2 reverse flanges
A warning is now reported for Appendix 2 reverse flanges when flange factor K = A / B' is greater than 2. The warning states, Appendix 2-13(a): Mandatory use of Appendix 2 for Reverse Flanges is limited to K ≤ 2. When K > 2, results become increasingly conservative and U-2(g) may be used. [7078]
Arithmetic operators now supported when entering data
COMPRESS now supports the use of arithmetic operators when entering numbers into input fields. Multiplication (*), division (/), addition (+) and subtraction (-) operators are supported. In addition, COMPRESS continues to support the feet (') and inches (") symbols for dimensional inputs. For instance, a length of 6 feet 8 inches (6'-8") may now be entered as inches in two ways: 6'8" or 6*12 + 8 [6966]
ASME B16.5/B16.47 MDMT rating
When impact tested material per UG-84 is specified for an ASME B16.5\B16.47 flange, the MDMT rating is now determined as the lower (colder) of the impact test temperature specified per the material specification or the rated MDMT determined per the Code rules (e.g. UCS-66 rules). [6999]
Auto nethasp.ini file configuration
COMPRESS now automatically configures the nethasp.ini file. After successfully logging onto a NetHASP License Manager for the first time, COMPRESS will record the network key server IP address/name in the nethasp.ini file in an effort to enhance network performance. In cases where there are multiple NetHASP License Managers running on a network, nethasp.ini configuration is necessary to ensure reliable COMPRESS operation. [7150]
Bolted cover - Figure UG-34 sketch (k)
For bolted covers with grooves for peripheral gaskets, a thickness check is now performed under the groove or between the groove and the outer edge of the bolted cover. [7070]
Clip warning - WRC-107 limitation exceeded
A warning deficiency is now reported if the clip length to width ratio exceeds the WRC-107 limitation of 1:4 or 4:1. When the WRC-107 limitation is exceeded the ratio used in the analysis is limited to 1:4 or 4:1 as applicable. [7076]
COMPRESS Help menu
The COMPRESS Help menu has been rearranged to provide easier access to the various help tools. [6707]
Context sensitive help - relevant section
Pressing the 'F1' key will now open the COMPRESS manual to the relevant section of the component that is being designed or modified. Previously, for several components, the COMPRESS manual would open to the Cylinder section of the COMPRESS manual for different components such as transitions, ellipsoidal heads, F & D heads, hemi heads, bolted covers, welded covers and Appendix 2 flanges. [5517]
Dished cover report
ASME Section II Part D page and line numbers are now reported for the flanged portion of the dished cover. [7003]
Ear lug hole diameter check
A dialog warning is now presented if the ear lug hole diameter exceeds 1/3 the lug diameter. Previously, the designer could not proceed with the design until this check, intended to prevent shear tear out, was satisfied. [7056]
FEA - nozzles attached to dished covers
FEA is no longer permitted for nozzles attached to dished covers. Previously, the analysis was incorrectly performed using a cylinder as the parent component. [7138]
Figure UG-34 sketch (d) welded cover
A deficiency is now issued if the dimensional limitations in UG-34(d) sketch (d) are not met. [6790]
Flanges subject to lethal service
A deficiency is now generated when the user attempts to utilize a slip-on, ring type loose, ring type integral, threaded or socket weld type flange on a vessel operating under lethal service as noted in UW-2(a)(1)(b). [6922]
Full metric report for flat bolted covers
The bolted cover calculations now report all equations in consistent metric units instead of the previous dual unit reporting. [6952]
Full metric report for support lugs
The support lug calculations now report values in consistent metric units instead of the previous dual unit reporting. [6953]
Full metric report for transition juncture calculations
The cone juncture calculations for transitions now report all values in consistent metric units instead of the previous dual unit reporting. [5838]
Full metric report for welded covers
The welded cover calculations now report all values in consistent metric units instead of the previous dual unit reporting. [6951]
Liquid level access button on main screen
A liquid level button, that appears when a liquid level is defined, has been added to the main vessel screen. This provides a quick way to access the liquid level dialog consistent with the method used for linings, insulation, packed beds and trays. [6756]
Metric reporting issue for supports
For metric units, the skirt, leg, lug, and base plate equations have been modified so the moment value matches the units listed in the wind and/or seismic report. Previously, the moment value was adjusted to account for a factor that was built into the equation for to provide an English conversion of lb-ft to lb-in. This is a reporting change only and does not affect the final results. [7065]
NBC wind and seismic code location synchronization
The Wind and Seismic dialogs will now offer to automatically set the NBC Location for a new NBC Wind (or Seismic) code if a corresponding NBC Seismic (or Wind) code is already present on the vessel. The NBC edition years must match between the Wind and Seismic codes for the synchronization to proceed. [7026]
New warning deficiency for Appendix 2 flange
The Deficiencies Report now includes a warning for any Appendix 2 Flanges on a vertical vessel with no support component. The warning states, "The hydrostatic end force on this Appendix 2 flange cannot be determined until a vessel support component is specified." [7011]
Nozzle detailed report
The user specified radial limits of reinforcement and local vessel thickness are now echoed in the nozzle detailed report if input. [7004]
Nozzle internal fillet weld warning
A warning deficiency is now reported if the internal fillet weld throat dimension is less than the internal corrosion allowance specified. [7073]
Nozzle Plan View Dialog changes
The nozzle Plan View Dialog, accessible through the Nozzle Details Dialog for nozzles located on heads, now more accurately displays nozzle pads. In addition, the dialog now displays the outer nozzle diameter. Previously, nozzle pads were always shown to be circular, even in cases where they were elliptical in shape, such as for a nozzle in the Perpendicular configuration. [7140]
Nozzle Report - Figure UG-40 reference for variable thickness nozzles
For variable thickness nozzles, Figure UG-40 dictates how the value t_e is determined for the limits of reinforcement calculation. The nozzle detailed report now indicates which sketch was used in the section title. For example, Limits of reinforcement per UG-40 and Fig. UG-40 sketch (e-1) is now reported. [7107]
Nozzle report - internal projection
An additional line detailing the nozzle internal projection is now listed in the input echo section of the report in order to clarify that the h_new variable is the internal projection value. [7105]
Nozzle report - UG-41 reference
The detailed nozzle report now includes the phrase "UG-41" in the Weld Failure Path Analysis Summary report title. [7101]
NozzlePRO manual now included
The NozzlePRO manual is now installed with COMPRESS and can be accessed through the Help menu. FEA Nozzles, now included in COMPRESS, is a subset of the PRG NozzlePRO program and so shares common calculation methods and reports. [7015]
Numeric precision in metric reports
The metric reports for cylinders, transitions and hemi heads have been changed to show two significant digits for calculated thickness values. Reported values also no longer include trailing zeros. [6905]
Pressure summary - impact test
The Impact Test column title in the Pressure Summary has been changed to Impact Tested. This was done to clarify that the column indicates whether or not impact testing has been specified not if it is required per Code rules. [7029]
Pressure summary - pad impact test
The Pressure Summary report has been reorganized to provide information for nozzles and nozzle pads separately. The MDMT Exemption notes for nozzles and pads have been separated. The report now explicitly lists if the pad material has been impact tested. [7028]
Saddle reporting - NBC Canada seismic code
Added a clarification to the Seismic section of the Saddle report that states "W_p" is the weight of the vessel and not the width of the wear plate. [7027]
Seismic report V_Accel table note
A new note now appears below the V_Accel table in the Seismic Report when lateral forces are present on a vessel. Note that the "Consider Vertical Accelerations" option in the Seismic Dialog must be checked for the table to appear. The text of the note reads, "Seismic base shears used in calculation of V_Accel Term do not include lateral forces." This is an informative reminder only; no calculation changes were made. [6340]
Skirt base ring dialog addition
A spin control is now present in the skirt base ring dialog when specifying the number of bolts. [7042]
Stainless steel pipe look up
Schedule 40S and 80S pipe designations are now available in the nozzle Standard Size Look Up option for NPS 14" to 30" excluding NPS 22" and 30". Schedules 40S and 80S are not list in ASME B36.19M 2004 for NPS 22" and 30". [7090]
Support lugs input error
Entering a value of zero (or less) for the support lug Lug Length and exiting the dialog would cause an overflow error in COMPRESS. COMPRESS now prevents users from entering a Lug Length less than or equal to zero. [6135]
Thickness summary corrosion allowance
The Total Corrosion Allowance column from the Pressure Summary table was relocated to the Thickness Summary table. [6396]
Torispherical head center of gravity location
The calculation of the center of gravity for an F&D head has been improved. [7054]
UBC 1997 Seismic Code Soil Profile S_F
The UBC 1997 Seismic code dialogs now allow the input of site-specific C_a and C_v values for soil profile S_F. The inputs are present in the Vessel Wizard and Vessel Wizard Defaults dialogs as well. [7045]
UCS-66 impact test requirement for castings
Impact testing is now enforced for castings not listed in Figure UCS-66 Notes (1) and (2). This requirement is listed in Figure UCS-66 note (f). [6958]
UG-116(e) marking - RT4 for welded pipe
Per ASME Interpretation VIII-1-07-10, the UG-116(e) marking is now designated as RT-4 for a shell made from ERW pipe that is welded to seamless dished heads where the head-to-shell circumferential seams are radiographed in accordance with UW-11(a) (FULL). [6698]
UG-41 strength of reinforcement - nozzle in a pipe cylinder
The lower groove weld size used in the UG-41 weld strength calculation is now reduced by 12.5% when the nozzle is attached to a cylinder constructed from pipe. This change is consistent with the ASME Code's conservative assumption that the nozzle is located in the thinned portion of the pipe for the UG-37 nozzle reinforcement and UG-41 weld load calculations. Note that the pipe tolerance of 12.5% is not deducted if the option switch Cylindrical shells made from pipe are entered as minimum thickness is active in the Set Mode\Options dialog. [7132]
UHA-51 rating of reinforcing pads
In determining the UHA MDMT rating for nozzle reinforcing pads, the pad's coincident stress ratio is now assumed to be the same as the parent component's coincident stress ratio. This will allow the exemption from impact testing per UHA-51(g) of some reinforcing pads that previously required impact testing. The pad's coincident stress ratio was previously assumed to be 1.0 in this case. [7016]
User defined bolts now reported
Appendix 2 Flange, Skirt Base Ring, Saddle and Leg Support reports now indicate whether a standard or user-defined bolt is being utilized. [6989]
Vacuum stiffening rings - new Details Dialog
For stiffening rings, a Details window is now available in the Ring Structural Member dialog that reports the final results for required and available moment of inertia as well as the maximum allowable external pressure (MAEP). [6969]
Welded covers - minimum required dimensions
The input dialog for welded covers now includes values for the inside corner radius (r) and flange thickness (t_f) as applicable. See figure UG-34 for requirements based on sketch type. [7119]
Wind and seismic code quick buttons
Quick-access buttons now appear at the top of the main vessel view when Wind or Seismic Codes are present in a vessel file. The buttons are similar in function to those that appear when linings or insulation are present. Clicking the 'Wind' or 'Seismic' button will bring up the associated dialog. [5967]

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Bug Fixes

Thick hemispherical heads per Appendix 1-3
For thick hemispherical heads falling under Appendix 1-3 that were also specified by outer diameter, the design thickness was calculated using the inner instead of the outer radius. The resulting design thickness was less than the Code required thickness. This issue has been corrected. [6774]
Component Commentary link for Appendix 2 and nozzle reports
The Appendix 2 flange and nozzle reports now contain a link to the Component Commentary report, when applicable. [6918]
Set Vessel Name values not retained
When the Set Vessel Name option was used, the vessel name and option to use the vessel name for the vessel window were not retained. This has been corrected. [7010]
Thickness Summary - transition governing load
In rating mode for the governing load for transitions (cones) was reported as Unknown in the Thickness Summary. This has been corrected. [7111]
UNS number not found error message
A UNS number not found error was displayed when opening a file for a small number of materials. This has been corrected. [7088]
Appendix 2 flange calculation issue
For a Ring Type Loose or Slip On Loose Appendix 2 flange with the option Constructed per Fig. 2-4 sketch 4 active, the calculation was not being completed due to an incorrect dimensional check. The sanity check now uses the shell, not the flange, corroded inner diameter for this type of construction. Note that an erroneous deficiency was reported indicating that the Flange corroded inner diameter is greater than or equal to the gasket outer diameter. [7000]
Appendix 2 flange MDMT error
For an Appendix 2 flange constructed from a UHA or UNF material, a deficiency was not reported if the rated MDMT was greater than the design MDMT. This has been corrected. [7142]
Appendix 2 flange metric reporting error
The metric conversion of factor e reported in the Hub and Flange Factors section of the Appendix 2 report was not performed when using metric units. This was a reporting error only and did not affect the calculated result. [7102]
ASME Section II-D Tables U and Y-1
A small number of materials were not correctly linked to the matching material specification in Tables U and/or Y-1. This resulted in missing yield and ultimate strength material properties which required the designer to input the missing information manually. This has been corrected. [7044]
Bolted cover gasket seating bolt load
The bolted cover gasket seating bolt load is now solved independent of the flange maximum pressure. This corrects an issue for nozzles on bolted covers where the maximum pressure determined was too low. In addition, it enables the maximum pressure rating of the bolted cover to be determined independent of the mating flange. [7080]
Clip WRC-107 deficiency issue
A reporting error has been corrected where the excessive stress deficiency indicated the location to be the pad edge instead of the lug edge. [6975]
Cover page image issue
While viewing the report, if anything was edited on the Cover Page Settings dialog the cover page image would appear distorted after clicking OK. This would correct itself the next time the calculations were run. [7020]
Crash after entering an Appendix 2 flange hub length of zero
For Appendix 2 reverse integral and slip on integral flanges, COMPRESS crashed if zero was input for the flange hub length h'. [7074]
Crash after moving an ASME B16.5/16.47 blind flange
When attempting to move an ASME B16.5/16.47 blind flange from the end of the vessel to an intermediate component, an error message was displayed indicating that the blind must be removed in order to proceed. After the blind was removed and the flange was relocated, the graphics still displayed the blind and COMPRESS crashed the next time that the calculations were run. [7038]
Crash in Seismic Dialog for UBC 1997
COMPRESS no longer crashes when an invalid value (less than 1) is entered into the Near Source Factors N_a or N_v in the UBC 1997 Seismic Code dialog. Note that the inputs are only available for Seismic Zone 4. [7047]
Crash when calculating minimum nozzle Distance (r)
COMPRESS crashed in certain rare cases when the Calculate Minimum r from desired External Projection Length button was clicked on the nozzle design dialog if the nozzle was not located over a valid component. [6992]
Crash when deleting Orphan Components
COMPRESS crashed while deleting the Orphan Components branch on the Tree tab of Delete Component dialog if the only Orphan Components available were linings and/or insulation. [7049]
Crash when using MKS units with the Thai or Korean version of Windows
COMPRESS crashed regularly for some configurations of the Thai and Korean versions of Windows if the MKS unit system was used and Kg/cm² pressure units were specified. This issue has been corrected. [7121]
Crash while editing a standard lift lug
COMPRESS crashed if an existing standard lift lug was edited, a pad was added and then the Local Stress Procedure was set to EN 13445. [7059]
Crash while editing a studding outlet in an invalid location
COMPRESS crashed after selecting the Standard Size Look-Up option for a studding outlet that was in an invalid location, such as over a body flange or off the vessel. This has been corrected. [7001]
Ear type lifting lug - length to brace plate, L₁ sanity check
The sanity check for Brace Plate location (L₁) in the Ear Type Lifting Lug dialog now allows the brace plate to be located against the collar (allowing space for collar and brace plate welds) or up against the bottom edge of the lug hole (allowing space for the brace plate weld) if no collar is present. Previously, the sanity check incorrectly required L₁ to be greater than one half of the lug diameter, D. [7064]
Equation evaluator - regional settings using comma in place of decimal
The HTML report equation evaluator now properly handles regional settings that use a decimal in place of a comma. Note that the equation evaluator is a built in COMPRESS report verification tool used to evaluate the results of equations in the HTML report. [7066]
Erroneous ASME B16.5/B16.47 MDMT message
For an ASME B16.5/B16.47 flange attached to a nozzle where the nozzle limits the vessel chamber MAWP, there was a possibility that an erroneous deficiency could be reported indicating the flange's rated MDMT was greater than the design MDMT. This has been corrected. [6997]
FEA - Allowable stress for nozzle external pressure condition
When performing FEA analysis on a nozzle under external pressure, the allowable compressive stress from the ASME vacuum charts is now used instead of the allowable tensile stress. [6970]
Flat head static test pressure
For horizontal vessels the static test pressure used for welded covers and bolted covers has been corrected. [6789]
Full X-ray check error
The error Calculate() failed! [Conversion from string "5A" to type 'Double' is not valid.] occurred when generating reports for any formed head, welded cover or bolted cover when all of the following conditions existed:

(1) X-Ray other than Full or Seamless specified
(2) Material Pno of 5A, 5B, or 5C
(3) Addenda A06 or before
(4) Running Build 6253 or after
[7048]
Hemi head radiography - UW-11(a)(5)(b)
An additional sanity check is now performed for hemispherical heads to ensure that a circumferential radiography setting of UW-11(a)(5)(b) has not been inadvertently specified. [7128]
Hillside nozzle deficiencies reporting issue
For integrally reinforced hillside nozzles, any deficiencies generated for the long chord direction check were not reported. In addition, for large openings designed per Appendix 1-10, any deficiencies generated from Code sections other than Appendix 1-10 were not reported. This affected the Deficiencies Summary only. This affected Builds 6255 through 6258 and has been corrected. [6971]
Hillside nozzles in spherically dished covers
The chord length calculation for hillside nozzles in dished covers incorrectly used the diameter at the connection of the head portion to the flange resulting in a conservative answer. This also affected other checks performed, such as the WRC 107 calculation, the UG-36(a)(1) check and the adjacent nozzle check. The UG-37 and UG-45 checks were not affected by this error. [6991]
Hydrotest overstress deficiency
For cones, cylinders and hemispherical heads where the hydrotest stress exceeded the allowable, the deficiency reported a minimum recommended thickness based on a hydrotest pressure of zero in some situations. For example, Cylinder #1: Stress (Pm=23,919 psi) during the shop hydro test exceeds 90% of yield. (0 psi), minimum recommended thickness is 0.001 in. This message has been corrected. [7036]
Hydrotest reporting deficiency error
When a component exceeded the hydrotest stress limit, the deficiency reported incorrectly listed the percentage of yield as zero instead of the actual allowable stress. This has been corrected. [7014]
Lift lug locations below center of gravity crash
If changes were made to a vertical vessel that caused the center of gravity to move above the lift lugs COMPRESS would cause a crash. [7072]
Lift lug reporting with non-US regional settings
The constants used in the equations (such as 0,707) now use the correct decimal separator based on the Windows regional setting. [7058]
Lift lug weak axis bending warning
A correction has been made to prevent an erroneous warning message from being displayed regarding lift lugs being out of plane with the vessel's center of gravity. An example of the message is Lift lugs are out of plane with center of gravity. Vessel may tilt during lift and lugs may experience weak axis bending. Lugs should be at 51.530 and 231.530. [7113]
Lock up when using the Shortcut Nozzle Design
COMPRESS locked up when using the Shortcut Nozzle Design if a nominal pipe size of 0.375 was selected and a flange type was selected on the Nozzles 2 page of the Set Mode Options dialog. When this happened, a message box titled Illegal Flange Type was displayed that could not be exited. [6965]
Material selections reset on the ASME Materials dialog
When selecting materials from the ASME Materials dialog, selections made after the dialog was first opened were reset when any of the Display Options were adjusted. This has been corrected. [6800]
Maximum stiffener ring temperature
An erroneous error message, stating that the temperature for external pressure was too high for the stiffener ring material, was sometimes displayed by COMPRESS. This did not occur for single stiffener rings and has been corrected. [7009]
MDMT stress ratio for ellipsoidal heads
For ellipsoidal heads with a head ratio other than 2:1, the required thickness t_r used in the MDMT stress ratio determination was incorrectly based on a K factor of 1. [7164]
Missing vessel snapshot on cover page
The vessel snapshot on the report cover page was not included when the vessel file name began with the # character. This has been corrected. [6948]
NBC 2005 location data look up
Several corrections were made to transcription errors in the NBC 2005 wind and seismic location data, found in the NBC Look Up dialog. [7023]
NBC 2005 minimum wind pressure check issue
The NBC 2005 Reference Wind Pressure input check has been corrected to allow a minimum value of 0.12 kPa. This check previously required the input to be greater than 0.19 kPa, which was the minimum value present in older versions of the NBC code. [7094]
NBC 2005 seismic report - metric base shear
The correct metric base shear value is now reported in the Base Shear Calculations section of the seismic report for vessels designed using the NBC 2005 seismic code with metric units. Previously, the metric base shear value (V) was incorrectly reported as the calculated base shear when either the minimum or maximum shear limits governed. This was a reporting error only and did not affect the calculations performed. [7130]
NBC look up dialog Syntax Error for certain locations
When using the National Building Code of Canada, the locations St. Mary's (Ontario), Val-d'Or (Quebec), and Campbell's Bay (Quebec) no longer cause a syntax error message in the NBC Look Up dialog. [7024]
NBC wind code pressure units
The saddle report now displays the correct wind pressure units when using the National Building Code of Canada (NBC). [6943]
Nozzle location incorrectly adjusted when loading files
In certain situations, the locations of nozzles were incorrectly adjusted when loading files. This could happen if the nozzle was initially set to an invalid location, the datum line was set from the far left shell seam, and the nozzle Offset (L) was set from the left seam of its parent component. [6973]
Nozzle on bolted cover - external pressure reports
The nozzle maximum allowable external pressure (MAEP) calculation is now reported for nozzles on bolted covers. The inability to solve for the nozzle MAEP was due to fact that the gasket seating bolt load used was at the Appendix 2 flange MAEP. The bolted cover gasket seating bolt is now solved for independent of the flange maximum pressure. [7079]
Nozzle on bolted cover calculation
A problem was corrected where it was possible for the bolted cover sketch option selected to not be synchronized properly with the attached Appendix 2 flange gasket configuration. This could cause an incorrect diameter to be used in the UG-37 t_r calculation for any nozzles attached to the bolted cover. In previous builds, this could be corrected manually by selecting the proper bolted cover sketch option. [4995]
Nozzle on flat cover thickness change issue
When a nozzle was placed on a welded or bolted cover designed for external pressure, the cover thickness could be un-necessarily increased due to the nozzle MAEP calculation. A correction has been made to prevent the thickness from changing during the nozzle MAEP calculation. [6925]
Nozzle on welded cover - factor C for required thickness
For a nozzle on a Fig. UG-34 (b-2) welded cover, the UG-37 and UG-45(b)(1) required thickness for the welded head used an incorrect C factor if the welded cover was not attached to another component. Note that for a stand alone welded cover of this type, the C factor is now conservatively assumed to be 0.33 as the calculation for the actual C factor can not be completed until an adjoining cylinder is attached. [7127]
Nozzle required thickness for external pressure
In design mode, the nozzle thickness is now increased automatically to meet the external pressure requirements of UG-45. Previously, if the nozzle neck thickness was not adequate the nozzle's maximum allowable external pressure was de-rated and a deficiency was reported. [6988]
Nozzle through a Category A joint
For a nozzle specified as Through a Category A Joint located on a component having a Category A joint efficiency less than one, the available area shown in the dialog was not correct. This issue was isolated to the intermediate dialog result and did not affect the final reported values. [7123]
Opening COMPRESS files from Windows Explorer
COMPRESS files did not open as expected when double clicked from within Windows Explorer. This issue has been corrected. [7040]
Pressure summary - MAEP value N/A
The pressure summary now reports N/A for MAEP instead of 0 for heads and Appendix 2 flanges when a maximum allowable external pressure is not applicable. This change applies to design mode only. For vessel chambers containing components that do not have an external design pressure specified, the chamber MAEP is not reported in the pressure summary. [7139]
Pressure summary note
For transitions and hemi heads made from high alloy material the Notes for MDMT Rating in the Pressure Summary included a note stating "Not a UCS-66 material". This note is unnecessary and has been removed. [7018]
Program crash when general arrangement drawing is active
Additional sanity checking is now performed in order to prevent a possible crash when the general arrangement drawing is active. [7131]
Rated MDMT for bolted and welded covers using user defined material
The rated MDMT is now calculated for bolted and welded covers specified with a user defined carbon steel material. Previously, the rated MDMT was set equal to the design MDMT even though the MDMT rating was not determined. [6993]
Reporting with non-US regional settings
If the Regional Options setting in the Windows control panel uses a decimal separator other than a period certain reported values displayed the units twice. [7057]
Reports - Save Report As
When saving a report using the File->Save Report As menu option, the title for the dialog window would display "Save As", causing confusion as to whether the file or report was being saved. The title for the dialog window now displays "Save Report As". [4923]
RT3 (UG-116(e)) marking issue
Per UG-116(e)(3) and Hartford Pressure Points Newsletter Volume 5 No. 1 November 2001, a vessel with a combination of spot radiography per UW-11(b) and full radiography per UW-11(a) should receive an RT 4 marking not RT 3 as was being listed. The radiography setting is reported in the Settings Summary and General Arrangement Drawing. [7118]
Saddle report formatting issue
When either the bending stress at the saddle or between the saddles was excessive, the warning produced in the saddle report included the text ###,###,###,##0 instead of the appropriate units. This reporting error occurred in Build 6255 and later and has been corrected. [6963]
Seismic code reliability/redundancy factor rho for horizontal vessels
The ASCE/IBC seismic code dialog input for the Reliability/Redundancy Factor, rho, is now hidden for horizontal vessels, as it is not used. For more information, see ASCE 7-98/02 section 9.6.1.3: "the reliability/redundancy factor, rho, is permitted to be taken equal to 1." [7067]
Sloshing damping coefficient
The default value of the damping coefficient used in the Vortex shedding calculation no longer includes the liquid sloshing contribution (0.005) when the operating liquid has a specific gravity of 0. [7043]
Thick hemispherical head MAP report
The maximum allowable pressure (MAP) calculation for thick hemispherical heads per Appendix 1-3 was always reported based on the inner radius. For an outer diameter design, the MAP calculation is now based on the outer radius. [6775]
Transition corroded weight and capacity
The corroded weight and capacity for a transition designed using the outer diameter has been corrected to account for the thickness and cone angle. [7051]
Transition weight - knuckles and flares
The estimated weight calculated for transitions with a knuckle or flare has been improved. Previously, the estimated weight was a little too high. [7053]
UCS-66 bolt impact test exemption paragraph reference
In the detailed Appendix 2 flange report and the Pressure Summary, the Figure UCS-66 paragraph reference has been corrected for the 2007 ASME VIII-1 Edition. [7082]
UCS-66(d) impact test exemption for NPS 4 and smaller
When using metric units the UCS-66(d) impact test exemption was sometimes not taken when permitted for cases where the material's minimum yield was exactly equal to one of the yield criteria. This issue was the result of a floating point comparison error and has been corrected. [7100]
User defined bolts
Newly defined bolts could not be selected until COMPRESS was closed and restarted. This issue was present in Builds 6253 and later. [6990]
Welded cover report - shell limits maximum pressure rating
For welded covers per Figure UG-34 sketches (b-1), (e), (f) or (g), the report now includes text to indicate if the attached shell limits the pressure rating. The shell's maximum pressure rating may govern as the C factor is based on the ratio of the shell required over nominal thickness. Previously, the maximum pressure rating per UG-34 was reported with values substituted into the equation, but the final maximum pressure rating did not match if the shell governed. [7143]
Wind code option Enforce Minimum Design Wind Loading of 10 psf
The wind code option Enforce Minimum Design Wind Loading of 10 psf is now functional for horizontal vessels for ASCE and IBC wind code selections. Previously, the minimum 10 psf wind load was not enforced for horizontal vessel wind calculations even if the dialog switch was active. [7108]
Wind pressure calculations for vessels on saddles
Corrections have been made to the formulae used to calculate the wind pressure used in the saddle calculations. The K_d factor of 0.95 was removed from ASCE 7-88, 7-93 and 7-95 calculations for q_z. In addition, the correct wind pressure formula, P = C_e C_q q_s I, is now used for all UBC wind codes. [6995]

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Build 6258 changes

Bug Fixes

Adjacent nozzle check error - Nozzles on head straight flange
For multiple nozzles in a head straight flange, an internal error has been corrected in the adjacent nozzle check that determines if nozzle reinforcement limits overlap or actual interference occurs. This could have resulted in an erroneous deficiency, such as Physical interference between nozzles A and B detected. Or, for nozzles that should be exempt per UG-36(c)(3)(a) this could have resulted in an overly conservative design as the reinforcement exemption was not permitted. [6950]

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Build 6257 changes

New Features

NBC 2005 Revisions and Errata
The first Revisions and Errata to the NBC 2005 Building Codes, issued December 2007, is now incorporated into COMPRESS. The changes are limited to data in the NBC Look Up dialog. In the New Brunswick province, Chatham was renamed Miramichi. Also, Whitehorse, Yukon had its Sa(1.0) value changed from 0.01 to 0.1. [6908]
Perpendicular nozzles on nozzle heads
COMPRESS now allows perpendicular nozzles to be placed on heads located on nozzles. Previously, an error message was displayed when attempting to choose this configuration. [6187]
Design Factor input for Support Lugs
The Support Lug Design Factor input has been moved from the Support Lugs / Ring Girder Support Design: WRC-107 dialog to the Support Lugs / Ring Girder Support dialog. This change allows the Design Factor to be specified for all Support Lugs, not just those with User-Defined Loads. As before, the factor may range from 1 to 3, inclusive. Note that the Design Factor input will be disabled when the Continuous Rings option is active as the factor is only used in the local stress analysis. [5864]
Heads attached to nozzles in Thickness Summary
Heads attached to nozzles are now included in the Thickness Summary. [6887]
Reports - Internal head indication
The head report now indicates if a head is an internal head. [6914]
Saddle allowable stress
The allowable stress for ring compression in the shell, S₅, is now taken as the minimum of 1/2 * (user input saddle yield stress or the shell yield stress). The shell yield stress at temperature is now taken from the appropriate table Y-1 in ASME II-D. If it is not found in table Y-1 it is taken from ASME II-D tables 1A or 1B. [6917]
Thread series removed from bolt description on ASME U-Forms
The bolt description that is generated automatically on the ASME U-Forms no longer includes the thread series. This information can still be entered manually. [6577]

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Bug Fixes

Crash when a nozzle was located on a spherically dished cover
A crash has been corrected that occurred when a nozzle was located on a spherically dished cover. This bug was present in builds 6255 and 6256 and affected new and existing files. [6903]
Latest ASME Addenda option disabled
In some cases, customers were not able to update COMPRESS files to the latest ASME addenda. This occurred when a file was created in Build 6252 or later with a protection key with an expired support and update (SUS) contract. After the SUS is renewed any COMPRESS files saved using that key should be able to use the newer ASME addenda options if opened using the same key, but an internal error preventing this from occurring. [6929]
Wind Code dialog - Topographic factor K_zt
The ASCE specific topographic factor, K_zt, is now properly hidden when User Defined is selected in the Wind Code dialog. [6872]
ASCE Wind Code Report: Equivalent Static Loading FL equation
A reporting error in the Vortex Shedding section of ASCE 1998 through 2005 Wind Code Reports was corrected. The equation for the Equivalent Static Loading, FL in the Vacuum, Corroded case now correctly reports the value of Beta. Previously, the Beta value for the Operating, Corroded case was reported, though the final value of FL was correct. This was a reporting error only and did not affect the calculations. [6924]
ASME B16.47 error message
For ASME B16.47 flanges, the error deficiency stating the flange rating is insufficient now correctly references ASME B16.47 instead of ASME B16.5. [6945]
ASME B16.5/16.47 body flange inadequate pressure-temperature rating warning
While an ASME B16.5 / B16.47 body flange was being edited in design mode, no warning was presented if the pressure rating was inadequate. [6819]
Blind ASME B16.5 flange limits maximum design temperature
Blind ASME B16.5 flanges limited the maximum design temperature for external pressure of their parent component. This prevented the desired design temperature for external pressure from being input while editing the parent component. [6461]
COMPRESS Manual - Bolt load equation
Equation 12.3 from Structural Analysis & Design Of Process Equipment by Jawad and Farr found on the Anchor Bolt and Base Plate Design page of the COMPRESS Manual previously did not include the "minus" sign for the weight W. The COMPRESS Manual now correctly displays the equation including the "minus" sign for the weight W. [6910]
Crash on vessels with both a vertical load and saddles
In certain rare cases, a crash was caused when the shell length was adjusted on a vessel with both saddles and a vertical load. This only happened when one saddle was placed near the edge of the vessel and the vertical load not located along the vessel length. [6949]
Crash when loading a file with a missing ASME B16.5 flange bolt material
COMPRESS crashed when loading files with a missing ASME B16.5/16.47 flange bolt material. This could happen in some cases if the code edition was changed after the model was created to an edition that the bolt material did not exist in. [6933]
Crash while creating a nozzle
COMPRESS crashed in a rare case when creating a nozzle if the nozzle's offset was set From the datum line and the Offset (L) placed the nozzle over a head. [6902]
Cylinder seamless longitudinal seam RT message
When editing a cylinder that had a seamless longitudinal seam RT and was made of tube material, a message was displayed that stated that the longitudinal seam RT should be seamless only for pipe, tube, or forging despite the cylinder being made of tube material. [6798]
Error looking up an allowable stress for user defined material
The error message An error has occurred while looking up an allowable stress value. Please contact Codeware for assistance. is repeatedly displayed if a component used a user defined material that was not entered into the main database, then one of the components design condition temperatures was changed. This could cause the wrong stress value to be used in the calculations in some cases. [6926]
Help file entry - UBC 1997 Seismic
The COMPRESS help file entry for UBC Seismic Codes now includes previously omitted information specific to the 1997 edition of the code. [6921]
Lock up when illegal slip on ASME B16.5 flange weight class was selected
When a slip on ASME B16.5 flange was edited, COMPRESS locked up in some cases if a weight class was selected that did not exist. [6793]
Long weld neck nozzle size in ASME U-Forms
The text placed in the nozzle Diameter or Size field on ASME U-Forms displayed a pipe size instead of the inner diameter in some cases for long weld neck nozzles. [6920]
Platforms without railing in Weight Summary report
The weight of platforms without a railing specified will now appear in the row of the component it is attached to in the Weight Contributed by Attachments table in the Weight Summary report. Previously the weight of such platforms would only be reported in the Total row. [5802]
Saddles - Metric reporting
An issue displaying the proper units for a section of the saddles report has been corrected. The head stresses section will now properly report in Metric units. [6935]
Saving User Defined Material Allowable Stress to user database
An error message was displayed when the Save this in the main database checkbox was active on the User Defined Material Allowable Stress dialog if the material did not initially exist in the user database. This dialog is used to prompt for allowable stresses at certain design condition temperatures if one of them changes. [6938]
Skirt reporting issue for SI and MKS units
The misspellings that occurred in the Skirt Report's listing of input variables no longer occur when the user selects SI or MKS unit systems. This bug was only an issue with build 6255 and 6256. [6937]
Vertical Load report for horizontal vessels
The entry Elevation above datum in the Vertical Load Report for horizontal vessels has been changed to read Distance above datum. [6881]

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Build 6256 changes

Bug Fixes

ASME B16.5/16.47 flange material
For nozzles with an integral flange, the selected material was changed for a small sub-set of the ASME B16.5/16.47 materials. A different material was assigned to the flange when the file was opened or calculated. This affected Build 6255 only. [6897]
COMPRESS Vista issue
COMPRESS users with a single user key and administrative privileges get a Access is denied (2). COMPRESS will now be shut down error message during start-up. A work around was to start COMPRESS by right clicking the shortcut and selecting Run as administrator. Non-administrator users were not affected by this issue. This was only an issue in Build 6255. [6898]
Creating new nozzles using metric units
For vessel designs using metric units, an issue has been corrected that occurred when creating a nozzle. The issue could result in a crash or in the reinforcing pad material, if present, changing. This affected Build 6255 only. [6895]
Appendix 2 flange on nozzle - Erroneous radiography warning
For an Appendix 2 flange attached to a nozzle an erroneous radiography warning, Full radiography required on Flange circumferential seam (UHA-33(a)), may have been displayed . This affected Build 6255 only. [6899]
Appendix 2 flange report
A formatting error has been corrected in the Appendix 2 flange report for loose flange types with a hub. In the flange report immediately after the statement SH does not exceed 1.5*S_fo, the remainder of the report was subscripted. This affected Build 6255 only. [6893]

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Build 6255 changes

New Features

ASME Section VIII, Division 1 2007 Edition
COMPRESS has been updated to include the 2007 Edition of the ASME Code. The following additions and changes were made to COMPRESS:

(1) The materials database now includes all ASME Section II, Part D 2007 Edition data for both Customary and Metric editions. This includes all materials from Tables 1A, 1B and 3. In addition, Table U (tensile strength), Table Y-1 (yield strength), Tables TE-1 through TE-5 (thermal expansion coefficients), Tables TM-1 through TM-5 (elastic moduli) and all vacuum charts have been updated.

(2) Tables 1A, 1B, 3, U, and Y-1: Values interpolated from the tables are now rounded per the rules specified by the applicable General Notes. The new rounding rules set the number of decimals to agree with the decimal places used for the higher temperature value. When the trailing digit is above 5 values are rounded up otherwise they are rounded down. COMPRESS applies these rounding rules only to designs done to the 2007 Edition. For a vessel component that was adequately designed per the 2004 A06 Edition Code, this change could result in an inadequate design per the 2007 Edition Code rules.

(3) Table U-3: DN numbers are now listed for all pipe schedules taken from the 2004 ASME B36.10M Welded and Seamless Wrought Steel Pipe standard. When using metric units, DN numbers are listed in the Standard Size Look-Up dialog.

(4) UG-36(b)(1): The rules of Appendix 1-7 are now permitted for large radial openings in conical shells. Appendix 1-10 has been added as an alternative to Appendix 1-7 for large openings in cylinders and cones. COMPRESS can be directed to use either Appendix 1-7 or 1-10 by selecting the desired analysis from the Action\Set Mode Options\Nozzles 1 dialog.

(5) UG-37(a): For nozzles located in a welded pipe or tube, a joint efficiency E₁ = 0.85 is used unless it can be shown that the opening does not pass through the longitudinal weld seam. When this circumstance is detected, COMPRESS displays a warning message as a reminder to the designer. If the nozzle dialog option Through a Category A Joint has been selected, COMPRESS automatically sets E₁ to 0.85. If the option has not been selected, the following warning is added to the Deficiencies Summary: This nozzle is attached to a component made from welded pipe or tube. Calculations are based on the nozzle not passing through the weld seam.

(6) Figure UW-13.1: The paragraph references for the minimum head straight flange length checks have been updated to reflect the sketch numbering change.

(7) UW-16(f)(3)(a)(6): The Code now states that the minimum wall thickness for UW-16(f) standard fittings is that of a Class 3000 ASME B16.11 fitting for the nearest equivalent nominal pipe size. For Type 5 nozzles, a deficiency is now reported if a nominal thickness below this minimum is used.

(8) Table UCS-23: The following new materials are now designated as UCS-23 materials: Grade 3VCb for SA-182, SA-336, SA-508, SA-541, SA-542 E Cl. 4a, and SA-832 23V.

(9) Figure UCS-66.2: Note (2) now lists metric values for the Figure UCS-66.2 reduction temperature limit and the reduction in MDMT equation. For metric units, the MDMT reduction is now calculated as (1 Ratio)*560C for reductions in MDMT up to and including 220C.

(10) Tables UNF-23.1 and UHA-23: The COMPRESS ASME database has been updated to reflect the required corrections and additions.

(11) UNF-79: UNS N06600 has been added to Table UNF-79. The forming strain\design temperature limitations listed in Table UNF-79 are now used when checking if post fabrication heat treatment is required.

(12) Table UHA-44: Corrections have been made to metric values for the limitation in lower temperature range and minimum heat treatment temperature. For metric design, these new metric temperatures are now used in the check for postfabrication heat treatment due to straining.

(13) Appendix 1-7: Large radial openings in a conical shell a with half apex angle equal to or less than 300, that do not have internal projections, and do not include a stress analysis from externally applied mechanical loads are now permitted. For openings in cylinders or conical shells that fall outside the scope of Appendix 1-7, Appendix 1-10 or Division 2 Part 4.5 is utilized as a U-2(g) analysis.

(14) Appendix 1-10: A new alternative method is now available to evaluate large openings in cylinders and cones. The designer can designate the analysis method globally on the Nozzles 1 tab of the Set Mode dialog or on an individual nozzle basis under the Areas option button in the nozzle dialog. The new method provides a direct calculation of the maximum local primary membrane stress at the nozzle intersection (P_L) by using a modified pressure area method to determine the magnitude of the discontinuity force resisted locally. Division 2 Part 4.5 is utilized to evaluate the strength of attachment welds as the UW-41 analysis is not applicable. It should be noted that the 2007 Edition of Division 2 uses this method for the design of all nozzles (all R_n/R ratios and nozzle configurations). For nozzle configurations that are not covered under Appendix 1-10 (e.g. hillside nozzles in cylinders), Division 2 Part 4.5 is used as a U-2(g) analysis.

(15) U Forms: The units of measure are no longer included in the base forms. Any quantity to which units apply is entered using the chosen units.

(16) Vacuum Chart Table Note 13: For vacuum charts NFT and NFZ, the option to apply a factor of 1.1 to the 'A' value is now available for stiffening rings constructed of unidirectional bar material. When a bar material assigned to one these vacuum charts is specified, the option switch Unidirectional bar product apply external pressure chart note (13) is available in the stiffening ring dialog.

[6827]
National Building Code of Canada 2005
The NBC 2005 building code is now available for wind and seismic design. Highlights of the changes implemented into COMPRESS follow:

While NBC 2005 has phased out the use of allowable (working) stress design (ASD) in favor of limit states design (LSD), ASME Section VIII remains an ASD code. As such, the LSD Load Combinations given in Table 4.1.3.2 are incompatible with ASME Section VIII pressure vessel design. NBC 2005 A-4.1.1.5.(2) allows for the use of "alternative solutions" provided they are proven to be of equivalent safety and performance. COMPRESS continues to use the NBC 1995 ASD Load Combinations from section 4.1.4.1.(1).

Wind

(1) A new NBC Look-Up dialog incorporates the revised location data from Table C-2. This data includes the recently separated territory, Nunavut.

(2) The reference wind pressure, q, is now based on a 50 year return period instead of the previously used q10, q30, and q100.

(3) Wind pressure calculations include a new Importance Factor, I_W.

Seismic

(1) The NBC 2005 seismic dialog contains many new inputs as well as a button for the new NBC Look Up dialog.

(2) The 5% damped spectral response accelerations, S_a(x) for periods of T = 0.2, 0.5, 1.0, and 2.0, are automatically filled in when a location is set in the NBC Look Up dialog.

(3) The Importance Factor, I_E (formerly I), is defined in 4.1.8.5.

(4) The Site Classification, similar to the like-named input in ASCE seismic codes, is found in Table 4.1.8.4.A.

(5) Velocity- and Acceleration-based site coefficients F_v and F_a, respectively, are automatically filled in with the appropriate values from Tables 4.1.8.4.B. and 4.1.8.4.C for Site Classes A through E. F_v and F_a must be manually entered for Site Class F.

(6) Ductility- and Overstrength-related force modification factors R_d and R_o, respectively, are found in table 4.1.8.9.

(7) Component response modification factor, R_p, is a new input for saddle supported horizontal vessels, and comes from Table 4.1.8.17.

(8) Vessel fundamental lateral period, T_a is now calculated only by the Rayleigh method, an "established method", as required by 4.1.8.11.(3). NBC 1995 used either the Rayleigh period or a diameter-based equation; the latter was removed from the 2005 edition.

(9) The Higher Mode factor, M_v, is taken from Table 4.1.8.11, and is based on values of S_a(0.2), S_a(2.0), and T_a.

(10) Seismic base shear, V, is calculated according to the Equivalent Static Force Procedure in section 4.1.8.11, and is subject to the minimum and maximum value constraints found in that section. A probability-based factor of 2/3 is applied to all seismic base shear values according to the NBC 1995 Load Combinations. Note that the V_max equation also includes a separate experience-based 2/3 factor. For more information, see Commentaries page J-45.

The NBC 2005 Wind and Seismic codes are available for use in the Vessel Wizard and Vessel Wizard Defaults Dialogs as well.

[6003]
Appendix 2 Flange rigidity calculations
A switch has been added to the first dialog screen for Appendix 2 flanges. This switch allows the user to suppress the Appendix 2 flange rigidity calculations for the seismic load case. Enforcing flange rigidity requirements in conjunction with seismic loading may be overly conservative. A general default setting for this option can be set on the Set Mode (F7) calculation dialog. [6858]
Appendix 2 Flanges - Longitudinal hub stress S_H reporting issue
For Ring Type Integral, Slip On Integral, and Weld Neck Integral flanges, the longitudinal hub stress S_H is set according to the provisions in Appendix 2-8(a)(1)(a) & (b). The report now clearly indicates how the allowable longitudinal hub stress is determined. [6862]

ASME B16.5\B16.47 Fitness for Service Materials
The following materials are now available for all ASME B16.5/B16.47 Editions. These materials should only be used in a Fitness for Service (FFS) evaluation of existing vessels when permissible per the governing ANSI document applicable to the initial design of the vessel.

New Flange Material Specification	ASME B16.5/B16.47 Material Group Assignment
A 181-I (FFS rating only)	1.4
A 181-II (FFS rating only)	1.1
A 181-60 (FFS rating only)	1.4
A 181-70 (FFS rating only)	1.1

[6846]

Error looking up allowable stress value for Appendix 2 flange bolt material
A message was displayed stating that an error occurred while looking up an allowable stress when a user-defined material with no allowable stress defined at 00F (-17.780C) was used for the bolt material of an appendix 2 flange that had no external pressure. [6843]
F&D and Ellipsoidal head report
For the case when the head minimum thickness is less than that required by the design condition(s), the resulting deficiency report now shows numerical values for the minimum head and design thicknesses. [5729]
Full Metric Reporting
The following reports now present the analysis and results in full metric formatting instead of the previous dual unit reporting : Ellipsoidal and F&D Heads, Saddles, Support Legs, Skirt Base Rings, Vacuum Rings, Appendix 2 Flanges, and Skirt Supports. [5842]
Nozzle report - Available projection from vessel outside surface
In the detailed nozzle report, the nozzle projection from the outside surface of the vessel to the flange face, if present, has been added back to the report. In Build 6253, the nozzle projection that was traditionally reported was reduced by the flange thickness, when applicable, to satisfy the requirements of UG-40(e). The nozzle projection available from reinforcement is reported as Lpr and the projection to the flange face is reported as Lf. If these two values are the same, then only one external projection is reported. [6808]
Process Industry Practices (PIP) - Vortex shedding warning
Wind calculations will add a Warning to the Deficiencies Report when vessel h/D ratio is greater than 15 but Vortex Shedding calculations are not enabled. PIP VECV1001 5.5.3 (February 2007) requires investigation for dynamic wind response when h/D is greater than or equal to 15 unless the vessel possesses "sufficient external appurtenances or wind spoilers...." Vortex Shedding calculations may be enabled by selecting the button on the Wind Code dialog. [6777]
Revisions dialog
The description box in the revision history dialog has been changed to wrap long lines of text which eliminates the need to manually scroll horizontally. [6824]
Vessel Wizard - NBC Look Up added for Wind and Seismic
The NBC Look Up feature present in the normal Wind and Seismic dialogs is now available in the Vessel Wizard and Vessel Wizard Defaults dialogs for all NBC building codes. In addition, Vessel Wizard Defaults files now store the selected Province and Location information. [6839]
XML Output: NBC Seismic Saddle Inputs now included
When an NBC Seismic Code is selected for a saddle supported vessel, the XML Output File now includes the NBC Saddle Input values Ar, hx, hn, and Rp (NBC 2005 only). [6854]

[Back to Top]

Bug Fixes

Standard Saddle Details dialog crash with Korean version of Windows
COMPRESS crashed when the Standard Saddle Details dialog was opened if it was being run on the Korean version of Windows. [6834]
Appendix 1-2 thick cylinder equations
COMPRESS now consistently uses the corroded dimensions when determining if the thick cylinder equations from Appendix 1-2 equations should be used. [6801]
Appendix 2 Flanges
The Required Bolt area in the Appendix 2 Flange report now displays the proper units in all cases. [6555]
Appendix 2 flanges attached to heads
A check has been added to ensure the geometry requirements of Figure 1-6(a) are met for Appendix 2 flanges attached to heads. [6810]
Appendix 2 split loose flanges - External pressure moment reporting error
For split loose flanges designed for external pressure, the equation reported for the operating moment (M_o) did not include the increase or decrease as specified in Appendix 2-9(a) and (b) as applicable. The final result was correct. [6781]
ASME B16.5/B16.47 Flange nomenclature change
The reference to the flange standard ASME B16.5/B16.47 has replaced the old reference of ANSI in the deficiency summary report. [6818]
Background color temporarily switched to white
When the Always Use White Background for Vessel Snapshot option was used and calculations were halted because of a problem with the model, the background was temporarily changed to white until the problem with the model was corrected and the calculations were re-run. [6782]
Bolted covers constructed of UNF materials
An issue has been corrected that could result in the error Public Function Get_Material_UNS_Number: UNS number not found - internal error when designing a bolted cover with a Table UNF material. [6823]
Cover page snapshot image after pressing F3 while viewing the report
If the calculations were run while viewing the report, the cover page snapshot image was an image of the report instead of an image of the vessel. [6768]
Crash for vessels with more than three pressure chambers
Vessel files that contained more than three pressure chambers crashed upon opening in Build 6254. [6837]
Crash on opening due to an invalid nozzle location
COMPRESS crashed due to an invalid nozzle location that caused the nozzle to be relocated to an intermediate skirt. This could happen when the dimensions of a nozzles parent component were changed to the point that the nozzle falls off of it and on to an intermediate skirt. [6825]
Crash when designing a studding outlet
COMPRESS crashed when the projection of a studding outlet was adjusted if it was placed over an invalid component, such as a body flange. [6769]
Crash when exporting model with a right or bottom internal head to XML
COMPRESS crashed while exporting a model that contained a right or bottom internal head to XML. [6767]
Crash when test liquid specific gravity was zero
COMPRESS crashed in some cases when the test liquid specific gravity was set to zero. This could prevent some files created in earlier builds from being opened in builds 6253 and 6254. [6849]
Crash when the automatic file backup feature was active
When the automatic file backup feature was active, COMPRESS crashed when canceling out of a dialog if an attempt was made to save a backup copy of the file while the dialog was open. [6859]
Crash when using the Nozzle Area Dialog
COMPRESS crashed when the Nozzle Area Dialog was opened if the nozzle was placed over an invalid component, such as a body flange. [6773]
Lift lug WRC 107 deficiency
When a WRC 107 analysis was performed on a lift lug, a deficiency may have reported an overstressed condition when the local stresses were acceptable. This could happen if the WRC 107 design factor was less than or equal to 1.5. [6889]
Lining and insulation buttons shown in vessel snapshot picture
If lining or insulation was present, their buttons were shown in the vessel snapshot picture found on the cover page of the report. [6806]
MDMT deficiency for UHT materials
MDMT does not need to be checked for UHT materials, however an MDMT check was still being applied to ellipsoidal and torispherical heads. A typical deficiency example was The Rated MDMT of -17.780C is warmer than the Design MDMT of -1150C. [6813]
MDMT for duplex stainless steels
The incorrect paragraph was specified to exempt duplex stainless steels from MDMT testing. Duplex stainless steels are covered under UHA-51(d)(3) not UHA-(d)(1)(b). [6820]
NBC Seismic Importance Factor for Lethal Service Vessels
COMPRESS will now display a reminder message in the NBC Seismic Dialog for both horizontal and vertical Lethal Service vessels when the Importance Factor is less than 1.5. Codeware recommends an Importance Factor of 1.5 or greater for conservatism in base shear calculations. In addition, COMPRESS now posts a warning to the Deficiencies Summary for vertical lethal service vessels with any NBC Seismic Code which states that, according to NBC Commentary, the vessel may require additional analysis beyond the use of Importance Factor = 1.5. [6842]
NBC Seismic Saddle Analysis Factor Cp
When the "Lethal Service" option is activated under the ASME Codes menu, the factor Cp used in Saddle Seismic Base Shear calculations for all NBC building codes is now taken as 1.5. Table 4.1.9.1.E in NBC 95, 4.1.8.17 in NBC 05, and 4.1.9.E in NBC 90 specify a Cp value of 1.5 in cases where the structure contains "toxic or explosive materials, materials having a flash point below 38C, or firefighting fluids." [6840]
Nozzle calculations Vessel constructed of welded pipe or tube
When a nozzle is attached to a vessel section constructed of welded pipe or tube, the vessel allowable stress used throughout the nozzle calculation is now based on the seamless allowable tensile stress. This is accomplished by dividing the allowable tensile stress from ASME II-D by 0.85 to account for the fact that the tabulated value already includes a 0.85 factor. This change provides a more economical analysis and a consistent calculation method regardless of the vessel material product form. For example, when a nozzle is attached to a cylinder constructed of rolled plate, the vessel allowable stress used does not include consideration of the level of radiography performed on the longitudinal weld seam. The only calculation which considers the vessel's longitudinal weld seam joint efficiency is UG-37, and this is only done when the nozzle or the nozzle's limits of reinforcement passes through the weld seam. For the case where a nozzle passes through a Category A weld seam, activate the Through a Category A Joint option located on the nozzle dialog. [6856]
Nozzle report - Weld sizing
For nozzle types 1, 3, 7, 9, or 10 when partial penetration groove welds are specified, it was possible for the nozzle detailed report to incorrectly indicate that the upper, lower, or combined (t₁ + t₂) fillet welds were unacceptable. For example, the statement, "** The weld size t₁ is NOT satisfactory. **" would be listed in the detailed report when not necessary. This would only occur when the actual fillet was equal to the required fillet weld and was due to a round off issue. [6770]
Pad reinforced nozzles - Creep range warning
For pad reinforced nozzles, a warning is issued if the vessel material or pad material allowable stress values are based on time dependent properties (creep range). The warning states, Reinforcing pads are not recommended for temperatures where time dependent material properties govern. (creep regime). A problem has been corrected with this check where the nozzle material was used instead of the vessel material. [6845]
PDF report format of experimental basin formula
The PDF report formatting of the experimental basin formula section in the cylinder or transition report has been improved. [6869]
Program crash - Adding ear type lift lug
A crash has been corrected when ear type lift lugs were applied to a vessel with a datum line offset from the bottom vessel seam. The crash would only occur for certain geometries where the datum offset was greater than the distance from the center of gravity to the top head seam. [6830]
Program crash - Lift lugs below center of gravity
If trunnion lugs are attached below the center of gravity and a tail lug is added then COMPRESS would crash due to all the lugs being below the center of gravity. A check has been added to prevent the program crash and an error is reported in the deficiency summary stating that the lift configuration is not valid. [6731]
Ring type integral flange dimension check
The dimension check for the thickness 'g1' to be greater than 'g0' was not being performed if the 'g0' value was read only in the dialog. [6847]
Saddle primary plus axial and secondary plus axial checks
For the saddle Primary bending + axial stress in the saddle due to end loads (assumes one saddle slotted) and Secondary bending + axial stress in the saddle due to end loads (includes thermal expansion, assumes one saddle slotted) checks, the governing condition was not always determined correctly. [6832]
Saddle report - ASCE 7-88 seismic load
The Saddle Report with the ASCE 7-88 Seismic Code applied now reports the proper base shear from Section 9.4, Equation 7. Previously, only the final base shear was reported. This did not affect the final base shear used in the saddle analysis. [6752]
Seismic Base Shear Calculations for the Operating, Corroded Case
The Base Shear Calculations: Operating, Corroded section of the Seismic Report is now reported correctly. In UBC 1997GS, for example, this issue manifested as a report that the vessel was rigid in the Operating, Corroded condition when it was in fact non-rigid. Reported Base Shear values are correct, however. This issue affects only reporting of the Operating, Corroded base shear calculations for certain seismic codes in builds 6252-6254; internal calculations as well as the Seismic Shear Report: Operating, Corroded and other sections of the report are not affected. [6838]
Seismic Code Report for vessels without external pressure
The Seismic detailed report no longer displays weight and fundamental period of vibration values for the Vacuum, Corroded case when there is no external pressure. [6860]
Studding outlet UCS-66 error
In rare instances it was possible that a "UCS-66 internal error" could be generated for studding outlet type nozzles. This would only happen if the nozzle material was not a UCS-66 material. The problem could be corrected by editing the nozzle. COMPRESS will now correct this problem automatically when a file is loaded. [6868]
Support leg bending stress
If the value of alpha is greater than 90 degrees then the cosine alpha term should be taken as the absolute value in order to prevent an incorrect negative term. This was only a reporting error in the detail equation, the final answer was correct. [6764]
t_r for nozzle parent
Due to the numerical iteration used to determine the MAWP or MAP for a nozzle, it was possible that a deficiency would be reported when not applicable. The deficiency was "Required thickness tr for the input nozzle pressure exceeds the component wall thickness". The numerical precision of the routine has been improved to prevent this deficiency from being reported when it does not apply. [6815]
Tail lug base ring stress calculations without a strut
An overstressed error is now reported for tail lugs attached to base rings where the strut option has not been selected. Previously, this condition was listed as a warning. Also. the Base Ring Strut Detail option button is now available on the tail lug dialog even when the strut option has not been specified on the Calculation tab of the Set Mode dialog. [6817]
Test liquid weight for F&D heads
The test liquid weight reported in the Weight Summary for torispherical heads on the right or bottom of a vessel was slightly low. The reported capacity for such heads was low as well. [6875]
Trunnion report -Load eccentricity
For trunnion reports the eccentricity value in the geometry input section now lists Load Eccentricity, E, previously it indicated Load eccentricity, a1 which is the variable for a standard type lug. [6883]
UCS-66.1 stress ratio - Formed heads
In the calculation of the UCS-66.1 stress ratio for formed heads, a calculation error has been corrected where the operating liquid head was applied twice. This conservative error only occurred when the Calculate MAWP option, located on the Calculation page of the Set Mode dialog, was turned off and when an operating liquid level was present. [6828]
UHA-51 nozzle rating issue - Changing materials
An issue has been corrected where the UHA-51 MDMT rating was not properly refreshed until the file was saved and reopened when a nozzle material was changed to another UHA material. [6836]
UNF-56(e) - PWHT requirement
For components fabricated from UNS No. N08800, N08810, N08811, PWHT was incorrectly enforced regardless of design temperature. Now, PWHT will not be enforced unless the internal or external design temperature is greater than 10000F (5400C). [6784]
Vacuum chart NFT-4
External pressure calculations were not available for materials requiring vacuum chart NFT-4. COMPRESS would freeze up if external pressure was applied to a component that had a material requiring vacuum chart NFT-4. [6779]
Vessel Wizard Wind and Seismic Dialog refresh issue fixed
The Vessel Wizard Wind and Seismic dialog now retains updated values when the enter key is used to go to the next page. Previously, a changed input value was not saved if the enter key was used while the cursor was still in the input box. [6857]
Wind Year selection now stored for NBC Look Up dialog
COMPRESS now stores the wind return year set in the NBC Look Up dialog for NBC 1995 and 1990 wind codes. Vessel Wizard defaults save wind year selection as well. Previously, the dialog would default to a 30 year return period each time it was opened, regardless of what was previously selected. [6405]

[Back to Top]

Build 6254 changes

New Features

Custom headers and footers for PDF reports
Custom headers and footers may now be set for PDF reports. This is available on the PDF Report Options dialog. [6618]
Cover Page - Background color for vessel image
For the cover page report, the vessel image background now defaults to white in order to enhance its appearance when printed. This setting may be changed by changing the Always Use White Background for Vessel Snapshot setting on the Cover Page Settings dialog. [6733]
Default vessel directory
When a COMPRESS file is opened from a directory, COMPRESS saves it as the default directory for the next time a file is opened. The default directory was not set correctly when a file was opened from the root of a drive, such as C:\. [6727]
Forms toolbar button
The ASME Forms toolbar button is now located to the right of the PDF reports toolbar button. This toolbar button is used to create\view an ASME Form or to return to the vessel design window when viewing an ASME Form. [6749]
Hot key for Show Internals
The main tool bar includes a button to show the vessel internals. This command is now also available by pressing 'F11'. [6705]
Nozzle report - UG-37 reference for nozzle on flat cover
In the nozzle detailed report for a nozzle attached to a welded or bolted cover, the Code reference for the calculation of t_r per UG-37 is now listed as UG-34. [6732]

[Back to Top]

Bug Fixes

Print margin settings for html reports corrupted
In Build 6253, the print margin settings for html reports were corrupted when COMPRESS was run. This caused the printed version of the html reports to fall off the side of the page. In some cases, this also affected printer margins in other applications that use html based printing such as Outlook and Internet Explorer. [6725]
Studding outlet type 12 calculation error
For type 12 studding outlets in the corroded A₅ available area calculation, the studding outlet inner diameter (Pad ID) was incorrectly increased by the inner corrosion two times. This resulted in a design that is more conservative than the Code rules require. [6759]
ANSI flange size auto-select
When adding an ASME B16.5\B16.47 flange to a nozzle, the initial flange size was not automatically set to match the nozzle nominal pipe size (NPS). [6722]
Appendix 2 flange hub cylinder report
In Build 6253, the hub cylinder report for a weld neck or reverse integral Appendix 2 flange contained unreplaced tags, such as %INT DES T%. The first time the report was generated the tags were properly replaced; however, if the report was regenerated the tags were not properly replaced. Note that the flange hub cylinder report is located after the Appendix 2 flange calculations. [6726]
Blank cone juncture deficiency
Under rare circumstances a blank deficiency would be listed for a transition that included cone juncture calculations. [6721]
Calculation integration
On the Calculation page of the Set Mode dialog (F7), three numerical integration options are available that allow control of calculation accuracy versus calculation speed. The Best setting provides the greatest calculation accuracy and the slowest calculation time while the Draft selection provides the fastest calculation time at the sacrifice of calculation accuracy. For most vessels, this setting does not affect the final results, but in rare instances changes in the design may occur. In previous builds, the Draft setting was always used in the calculation performed when opening vessels and when editing components. In order to maintain calculation consistency, this has been changed to always use the numerical integration selection in all calculation operations. [6730]
Corroded F&D head weight
The weight for an F&D head in the corroded condition was slightly excessive. [6763]
Crash while creating a nozzle with Shortcut Nozzle Design
When a nozzle was designed using the Shortcut Nozzle Design dialog, a crash occurred in some cases when the vessel was incomplete and the nozzle was placed above the top of the vessel. [6737]
Dimension error while using M.K.S. units on foreign operating systems
For some foreign Windows operating systems, it was not possible to design components using the M.K.S. unit system with Kg/cm^2 as the pressure units. This caused a message box to appear which stated that there was a conversion error. [6724]
East Asian locale COMPRESS crash
COMPRESS build 6253 crashes in some East Asian locales such as Korea. This has now been corrected. [6762]
Error when opening files containing foreign characters in the file name
When a file was opened that contained unknown characters in the file name such as "g", an error message was displayed that stated that it was an Unknown error and instructed the user to contact Codeware. [6728]
F&D head capacity
The capacity for F&D heads was slightly excessive. [6755]
Form pressure units when using M.K.S unit system with Kg/cm2 units
When a form was created for a vessel that was using the M.K.S. unit system with Kg/cm^2 as the pressure units, kg/cm² was displayed in some of the form edit boxes instead of Kg/cm2. [6747]
NetHASP.ini Error Message Text
COMPRESS now displays informative text in the previously blank error message when the NetHASP.ini file has incorrect syntax. This affected Build 6253 only. [6760]
Nozzle FEA PDF reports - Customizing PDF reports
Nozzle FEA reports were not included in the PDF report when it was created using the Customize PDF Report option. [6632]
Nozzle FEA PDF reports - Graphical results not present
The Nozzle FEA graphical results are now included in the PDF version of the report. In FEA PDF results are included in one report when viewing and printing. [6748]
Perpendicular nozzle on ellipsoidal head
For perpendicular nozzles in bottom\right ellipsoidal heads, the distance from the nozzle center line to the spherical limit was calculated incorrectly. This could result in the incorrect determination that the nozzle's parallel limit of reinforcement was inside the head's spherical limit, which in turn would yield an unconservative UG-37 required thickness t_r. [6751]
Program crash - Applying lining or insulation to an empty document
A crash has been corrected that occurred if lining or insulation was applied to an open document with no vessel components. The crash occurred after the OK button was selected on the lining or insulation dialog. [6696]
Text size - Internet Explorer
The html report text size selected in COMPRESS is no longer linked to the text size set for Internet Explorer. This allows the text size for COMPRESS reports to be unaffected by text size changes made when using Internet Explorer. [6735]
Transition apex angle with a flare
A minor correction has been made to the calculation of the cone apex angle for cones that include a flared end. [6754]
UCS-66 exemption curve for SA-537 class 3
SA-537 class 3 is now correctly using UCS-66 curve D. Previously, only classes 1 and 2 were being assigned to curve D. This change applies to all addenda since A97. [6703]

[Back to Top]

Build 6253 changes

New Features

ASME U-4 form available as standalone
The ASME U-4 form is now available as a standalone form. It has optional sections for nozzles, shell courses, replacement parts, remarks, and data items. All of these sections have editable titles. [6510]
Brace plate for ear type lifting lugs
A new option is now available for ear type lifting lugs to include a bracing plate from the lug to the top head. This brace plate increases the permissible weak axis bending angle. Consideration of the brace plate weld in the ear lug weld calculations may be turned on or off with the option switch located on the Set Mode Calculation dialog. Currently, no calculations are performed for the brace plate or the loads imposed locally at the brace to head attachment point. It is recommended that the brace plate be removed before the vessel is put in service. [5658]
Collars for lift lugs
All available types of lift lugs now offer the option of specifying a collar to reinforce the lug hole. And, a new weld shear stress calculation for the collar to lug weld is now performed. Previously, collars were only available for ear type lugs. [6533]
Ear type lift lug - Extended weld area
The ear type lift lug now includes an option to increase the weld area. This option provides more weld strength for the same size lift lug. To utilize this lug weld configuration, activate the option switch Has Extended Weld Area and specify the additional weld lengths (b1 and d2). [6196]
Ear type lift lugs - selection of parent component
A new option is now available in the ear lug dialog that permits the selection of the parent component. Any cylinder or head with a sufficiently long straight flange is permitted as long as the attachment elevation is above the vessel center of gravity. Previously, ear type lift lugs were always attached to the top most cylinder. [6494]
Extended functionality for the ASME U-4 and NBIC R-4 forms
The functionality of the supplementary forms has been enhanced.

(1) Header and footer information may now be specified for the supplementary forms.

(2) Data item entries are now available for each form.

(3) Additional shell course and nozzle table entries may be added to the ASME U-4 and ASME A-3 forms, regardless of the vessel geometry.

(4) The title of each section on the supplementary form is editable.

[6454]
Improvements made to the Undo/Redo feature
The Undo/Redo feature is now more robust. Changes made to the design code, design mode, seismic code, platforms, piping, insulation, and linings are now handled. In addition, all changes to vessel geometry can now be undone\redone. Previously, Undo/Redo was not available for a small subset of vessel geometry changes. [6367]
Lift lug - Tail lug base ring weld
The weld considered for tailing lugs welded to skirt base rings now includes the weld between the lift lug and the base ring(s). This additional weld increases the total weld area and the polar moment of inertia allowing for a more economical design. Previously, only the weld between the lug and the skirt was considered. [6197]
Lift lug - Trunnions
COMPRESS now provides the option of specifying trunnion type lift lugs for vertical vessels. Both fixed plate and turning plate trunnion types are available. [6090]
Metric versions of all forms are now available
Metric versions of all forms are now available. These include the ASME A-1, A-2, U-1, U-1A, U-2, U-2A, U-3 U-4 and NBIC R-1 forms. [6552]
Nozzle - Limits of reinforcement check
A warning is now reported if a nozzle's parallel limit of reinforcement falls onto a another component that is thinner or a different type than the parent component. [3591]
Nozzle calculation - Type 12 studding outlet
For type 12 studding outlets, the pad outer diameter minus pad inner diameter is now taken as t_n in the area required (A_r) and area available in vessel (A₁). This change will account for the case where the strength reduction factor f_r1 less than 1. [5876]
Nozzles located on straight flanges
Nozzles located on head straight flanges are now supported. To attach a nozzle to a head straight flange, use the Perpendicular option on the nozzle dialog and specify the Offset (L) dimension where the nozzle is located on the head straight flange. Previously, it was possible to locate a nozzle on a head straight flange, but the nozzle was calculated as if it was attached to the head, using the dimensions of the head and not the straight flange. [6535]
Set nozzle corrosion equal to parent's corrosion
A new option, Nozzle corrosion allowance same as parent, is now available that will automatically set the corrosion allowance of every nozzle equal to that of it’s parent component. This option may be found in the Set Mode Options dialog under the Nozzles 2 tab in the Nozzle Design Preferences section. [5966]
Tail lug location
Tailing lug location can now be specified on any acceptable component of the vessel that is below the vessel center of gravity. Previously, tailing lugs were only permitted on the lowest cylinder or the skirt. [6493]
Tail lugs on skirt double ring base rings
It is now possible to specify a tailing lug that extends beyond the top ring of a double base ring. The additional weld area and polar moment of inertia are included in the weld stress calculations. [6502]
UG-40(e) - Nozzle available reinforcement
Per UG-40(e), available reinforcement in bolted flange material that falls within the limits of reinforcement may not be considered. COMPRESS now automatically excludes the flange thickness from contributing as available reinforcement. Previously, manual adjustment of the nozzle projection was required in the rare circumstances where the limit normal to vessel wall extended into the flange thickness region.

The flange thickness is no longer available as potential reinforcement for the following:
(1) integral nozzles (long weld neck, heavy barrel, custom forging)
(2) nozzles with integral Appendix 2 flanges attached
(3) nozzles with ASME B16.5\B16.47 welding neck flanges attached.

Credit is no longer taken for available reinforcement beyond the end of the nozzle pipe for the following:

(1) nozzles with ASME B16.5/16.47 Slip-on or Socket type flanges
(2) nozzles with Appendix 2 loose type flanges attached [6669]
UNF-56 PWHT check
Post weld heat treatment is now enforced per UNF-56(d) & (e) when required. [6601]
Variable thickness nozzle calculation
For variable thickness nozzles (Type 9 and 10), the t_e and t_n dimensions defined in Figure UG-40 sketches (e-1) and (e-2) are now only used in the determination of the UG-40 limits of reinforcement. Previously, these were used through out the nozzle calculations (UG-37, UG-41, Appendix 1-7). For a nozzle implanted into the vessel wall with a strength reduction factor f_r1 less than 1, this interpretation of the Code could result in a slightly unconservative result as a smaller area required and a slightly larger area available in vessel wall (A₁) were calculated. [5485]
Windows Vista Compatibility
COMPRESS now supports the Windows Vista operating system. Administrator privileges are required to install COMPRESS as well as to run the automatic update feature. By default, the automatic update feature is turned off when installed on Vista. [6688]
Appendix 2 flange note
The note "Negative values of Pm + Pr are conservatively ignored" in the Appendix 2 Flange Report was changed to read "When the sum of equivalent pressures due to external loads (Pm + Pr) is a negative value, it is conservatively ignored." [6637]
Appendix 2 flange report headings
Appendix 2 Flange report headings now have a larger font size to allow easier identification of the start of a calculation section. The headings also include either 'Internal Pressure' or 'External Pressure' in the Design Mode and either "MAWP" or "MAEP" in the Rating Mode as appropriate to indicate the pressure case. [6636]
Baffle color
The color of baffles may now be set on the Drawing page of the Set Mode Options dialog. [6628]
Build number in PDF report headers and footers
An option has been added that allows the build number to be placed in the headers and footers of the PDF report. This has been added to the list of available headers and footers on the PDF Report Options dialog. [6629]
Code Case 2055 - Pneumatic testing and UG-20(f) exemptions
A warning, indicating that the additional requirements of Code Case 2055 must be met, is now reported if a pneumatic test is specified and the No UG-20(f) exemptions option located on the ASME Codes dialog is not active. Code Case 2055 permits UG-20(f) exemptions for a vessel that is pneumatically tested provided the limits on maximum test pressure, MAWP, and maximum weld joint sizes are not exceeded. [6610]
Comment added to XML files to avoid Internet Explorer security bar
An HTML comment has been added to the top of XML files exported from COMPRESS. The comment, " <!-- saved from url=(0024)http://www.codeware.com/ -- > ", prevents the yellow security bar from appearing when the XML file is opened from a local drive in Internet Explorer. The XML files pose no security threat, but Internet Explorer takes extra precautions when the files are stored on your local hard drive. [6390]
COMPRESS manual - WRC 107 rigid insert assumption
The COMPRESS manual has been updated to clarify the fact that the rigid insert check is only applicable to nozzles in heads. [6571]
Crash when opening an empty file
A new check is now present that prevents a crash that occurred when a file was opened that had a file size of 0 kb. Note that the crash only occurred when the file was opened by double clicking or dragging into the COMPRESS window from another application such as Windows Explorer. [5562]
Default background color
A default background color may now be set. Previously, default colors could be set for every part of the vessel drawing except the background on the Drawing page of the Set Mode Options dialog. [6627]
Default color scheme updated
A new default vessel component color scheme with more realistic colors is now available. If you have ever modified your default color scheme, it will not be replaced. To use this new color scheme, open the Set Mode Options dialog, choose the Drawing tab, click Load Scheme, choose CODEWARE.CSS from the COMPRESS executable directory, and click Save Scheme. To revert to the old color scheme, follow the same steps but select the file CODEWARE_OLD.CSS. [6490]
Dished Cover dialog sketch dimension labels
The sketch dimension labels in the Dished Cover dialog have been changed from numerical values to characters matching the dialog inputs. [6505]
Flange maximum pressure error deficiency
For Appendix 2 flanges, an error deficiency is now displayed if the maximum pressure rating is less than the specified design pressure. [6668]
Forms - selection boxes added
Selection boxes are now used on certain form inputs, making it easier to enter data for especially tedious fields such as the How Attached field for nozzle entries. Most of the inputs that were limited to a particular set of options now use the selection boxes now so that any value may be entered. [6525]
Improved ring placement checks
Improved sanity checks are now present in the ring dialog that warn when any ring in a group is not positioned on a valid component (cylinder, transition, or head straight flange). The warning may be ignored, but this and any further invalid locations are added to the Deficiencies Summary report as an error.

(1) If any rings are located off the vessel ("floating" rings), a similar dialog warning and deficiency is issued. Previously, this check applied only to the first ring in a group.

(2) For files created with previous builds that have floating\invalid ring locations, a deficiency instead of a warning is now generated.

(3) Floating rings that are positioned beyond a top or bottom head are now visible in the 3D graphical representation. [6279]
Lift lug - Allowable stresses per ASME B30.20
A new option is now available that sets the allowable stress values as specified in ASME B30.20. This option sets the lift lug allowable tensile stress to 1/3 of the yield strength and ratios the bearing, shear, and bending allowables based on the allowable tensile stress. This option can be set as an application default from the Calculation page of the Set Mode dialog or independently for individual lugs from the Lift Lug Allowable Stresses dialog. The lift lug report echoes the status of this setting along with the allowable stress values. [6257]
Lift lug - New shear stress at lug hole calculation
A new shear stress at the lug hole calculation is now performed for lift lugs. [6647]
Lift lug - Offset to hole centerline
For standard and ear type lugs, the offset dimension that defines a lift lug's elevation is now taken as the distance to the hole centerline. For the new trunnion type lift lugs, the offset dimension refers to the pipe centerline elevation. Lug locations are maintained for files created in previous builds by automatically updating the input to the distance to the lug hole instead of to the lowest elevation of the lug. A sketch is now present in the lift lug dialogs to clarify this input. [5655]
Lift lug - Second lug for balanced lift
Some refinements have been made to the option that automatically generates a second lift lug for a balanced lift. Previously, the second lug was always located at an equal distance from the center of gravity. Now, the second lug will be placed, if possible, on the same component type as the initial lug even if this results in one lug taking more of the load. For example, if the initial lug is on a cylinder, the new lug is also placed on a cylinder. [5669]
Lift lug - Thickness in rating mode
COMPRESS no longer increases the thickness of lifting lugs to exceed the required thickness when in rating mode. A deficiency is reported if the lug thickness is less than the required lug thickness. [5950]
Lift lug - WRC 107 design factor
Lift lugs that use WRC 107 for local stress analysis now have an input for the design factor. This provides the ability to adjust the allowable combined stress. [6060]
Lift lugs on heads - Local stress analysis
As WRC 107 bulletin is not applicable for rectangular attachments on heads, this option may no longer be selected when a lift lug is attached to a head. In previous builds, the WRC 107 option could be selected but the deficiency 'The local stresses for the lug have not been calculated' was reported. [6587]
Maximum allowable bolt material temperature error
When the design temperature of an ASME B16.5/16.47 flange exceeds the ASME Section II Part D maximum bolt material temperature, the deficiency issued is now reported as an error instead of a warning. ASME B16.5\B16.47 Table 1B general note (a) states, "Bolting material shall not be used beyond temperature limits specified in the governing code." This affects both Division 1 and Division 2 vessels. [6658]
Maximum temperature limit for ASME B16.5 flanges
For builds previous to 6250 COMPRESS could display a message box erroneously indicating that the design temperature was too high when an ASME B16.5/16.47 flange was attached to a nozzle. This would only occur for certain limited flange materials. Temperature limits are now determined from ASME B16.5/16.47 instead of ASME Section II Part D. [5666]
Minimal reports dialog
Buttons have been added to the Minimal Reports dialog which will select or deselect all of the options for the component and heat exchanger categories. [5759]
Nozzle sanity check
A deficiency is now reported if a nozzle corrosion allowance is input that is greater than or equal to the nozzle neck minimum thickness. [6604]
Opening COMPRESS read-only files
An issue has been corrected where the check performed to see if a COMPRESS file is read-only did not function properly unless the read-only and archive attributes were both set. Now, COMPRESS identifies a file as read-only based solely on the read-only attribute. [6622]
Option to set color of text tags in 3-D model
Text tag color in the 3-D view may now be set on the Drawing page of the Set Mode Options dialog. There are three new items available on the Drawing page: Dimension Tag - Component Elevations, Dimension Tag - Component Identifiers, and Dimension Tag - General Vessel. Note that Nozzle Tag settings are found under the Nozzle group. [6645]
PDF report display option
The Report Display option in the PDF Report Options dialog now retains the value selected. Previously, the buttons on the main toolbar had to be used to choose the report format. [6671]
Revision history
When creating a new vessel, the revision history now includes the text Section VIII in the new vessel created item. For example, New vessel created ASME Section VIII Division 1 [Build 6253] is now listed. [6673]
Set Mode Calculation Tab: ASCE option caption
The ASCE Load Combinations text on the Calculation tab of the Set Mode Options dialog has been revised to "Do Not Consider ASCE 2.4.1 Basic Load Combinations 7 and 8." This change was made to clarify that ASCE 7-02 and 7-05 Basic Load Combinations 7 and 8 (in ASCE 7-98, combinations 4 and 5) come from section 2.4.1 as opposed to section 2.3. [6581]
Shell and hemispherical head diameter specification on ASME Forms
Previously, the diameter of shells and hemispherical heads was always specified on ASME Forms using the inner diameter or radius. Now either inner or outer is reported, depending on which was used while designing the component. For example, if a cylinder is created and an Outer Diameter of 30” is specified on the Cylinder Dimensions dialog, 30” OD is reported. [6379]
Tail lug base ring stress calculations with a strut
For tail lugs attached to base rings, a new option is now available to specify whether a strut should be considered when the base ring is overstressed. This option Consider strut in tail lug / base ring calculation may be set as a global default on the Set Mode Options dialog on the Calculation tab or in individual files by selecting the Base Ring Strut Detail button on the Lifting Lugs dialog. When active, the strut description and cross sectional area are may be input by activating the relevant option switch. Previously, strut calculations were automatically performed if the base ring was overstressed and the required cross sectional area was determined. [6534]
Toolbar configuration
A menu listing the available toolbars is now shown when the blank area next to toolbars is right clicked. Toolbars may be turned on and off from this menu. [6560]
Vacuum ring - Rating mode deficiency
In the rating mode, a deficiency is now reported for vacuum rings that do not meet the specified external design pressure. [6570]
Welded covers per Figure UG-34 sketch (h)
A deficiency is now reported for welded covers designed per Figure UG-34 sketch (h) when the nominal thickness of the attached shell (t_s is less than the 1.25 times the required thickness of a seamless shell (t_r) due to internal pressure. [6634]
XML file - Limiting component
The XML output file now reports the name of the component that governs the MAWP, MAP, and MAEP for each pressure chamber. If multiple components exist with the same governing value, only one name is reported. In addition, if the option to calculate MAWP or MAP is deactivated under the Calculation tab of the Set Mode dialog, the corresponding "compGoverningChamber…" tag will not be reported in the XML file. [6679]
XML file - Static head
The XML output file now includes static head data for vessel components when operating liquid levels are present. New tags were added to output operating static head, operating static head plus design pressure, external static head, and external static head plus external design pressure. The external tags will appear only for certain components, such as exchanger tubes, internal heads, and the rear channel components in a Type (a) exchanger. [6666]

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Bug Fixes

Appendix 2 Flange hub cylinder calculation
The following corrections have been made to the Appendix 2 hub cylinder calculation:

(1) The longitudinal radiography is now reported as Seamless No RT instead of N/A.

(2) Only one circumferential joint radiography is reported since one end of the hub is integrally attached to the flange. The radiography for the integral end of the hub is now reported as N/A.

(3) In the circumferential stress calculations, the joint efficiency is now based on UW-12(d).

(4) In the longitudinal stress calculations, the circumferential joint efficiency at the weld joint is now always used. Previously when the support point was above an Appendix 2 flange, the circumferential joint efficiency was always taken as 1 as the location investigated was the bottom of the hub and no joint existed at this point. [6483]
ASME B16.5 long weld neck - Nozzle neck material
When designing a long weld neck, the nozzle neck material was incorrectly set to the default forging material specified in the Set Mode dialog on the Nozzles 2 page. This could result in a 'Temperature…is too high' error, or calculations based on the incorrect nozzle neck material. In previous builds, this problem could typically be corrected by editing the nozzle again. [6005]
Clip / Lug WRC-107 analysis
The WRC-107 analysis was not considering the 12.5% mill tolerance for clips attached to a component constructed from pipe material. This affected the R_m / t ratio. [6408]
Concrete Compressive Strength
The concrete compressive strength used for foundation bearing stress acceptance now defaults to 1658 psi (11.4 MPa) per PIP VESV1002 February 2007 paragraph 5.12.5. Previously, the default value was 750 psi. [6613]
3D model - Nozzle angular position on bottom head
Nozzles attached to a bottom\right heads are now located and drawn in the 3D model with the same coordinate system used for locating nozzles in top\left heads. Previously, the coordinate system was reversed. For example, for an angular input of 450, a nozzle in top head would be 2700 from a nozzle in the bottom head. [6070]
Appendix 2 flange hub material Produced to Fine Grain Practice
For an Appendix 2 flange with an integral hub acting as a cylinder (e.g. weld neck), the Produced to Fine Grain Practice option was not properly applied to the hub cylinder calculation. Consequently, different UCS-66 curves were applied for the flange and flange hub. This only affects flanges with hubs designed per the A06 Addenda. [6585]
Appendix 2 invalid bore corrosion deficiency
For ring type loose and ring type full face Appendix 2 flanges, the deficiency "Bore corrosion allowance (0.125 in) is greater than or equal to the flange hub thickness (g1 = 0.0625 in)" was incorrectly reported if a flange bore corrosion allowance was specified. [6654]
ASME form U-1A joint efficiency and seam RT
In some cases, incorrect values were listed for the joint efficiency and seam RT on line 7 of ASME form U-1A. [6578]
ASME Forms - Inch symbol (“) missing on saved forms
When a file containing a form was reloaded, the inch symbols (“) was missing on any relevant data on the form. Forms saved in previous builds will load correctly into build 6253. [6378]
ASME Section II Part D - Table 1A note G35
The reference for Table 1A note G35 has been corrected to read Appendix A. In the 2004 Edition, this note was changed from Appendix 6 to Appendix A. [6566]
ASME Section II Part D material page reference
The page reference for materials listed on page 65.1 has been corrected for II-D A06 and A05 for both the Customary and Metric editions. Previously, the page reference was reported as 65.001. [6541]
ASME Section II Part D Metric - Table 1A Note T11
The creep range note T11 incorporated in the A06 II-D Metric was not properly implemented. This could result in an erroneous deficiency for applicable materials. [6514]
Browse for file error
If a file, which no longer exists or has been moved, is selected from the recent file list on the File menu, then an option to browse to the file is provided. In this instance, the error Unknown error trying to check the version … was displayed when either the file was selected from a new location or if No was selected to not browse for the file. [6674]
Code Case 2260 deficiency
For formed heads designed per Code Case 2260, the deficiency produced when the design temperature exceeds the maximum permissible temperature incorrectly referenced Appendix 1-4. [6540]
COMPRESS Manual - Compression plate length
The definition for the Compression Plate Length on the External Chairs Dialog page incorrectly states that the length of the plate must at least be equal to w + 2h. This has been corrected to w + 2*tg. [6480]
COMPRESS Manual - Skirt base ring
COMPRESS manual has been corrected to state that a deficiency is reported if the actual anchor bolt spacing is less than the minimum spacing. [6420]
Cone juncture MAP deficiency
When the vessel Calculate MAP (excluding nozzles) option is turned off, it was possible for an erroneous deficiency to be reported that the cone juncture MAP is less than the internal design pressure. [6466]
Corrections made to the U1A form
Corrections were made to the ASME U-1A form in order to reflect the original ASME U-1A form exactly. The label “Year” was added to the input in section 5. An additional line for remarks was added to section 12. And, in the "CERTIFICATE OF SHOP/FIELD INSPECTION" section "pressure vessel part" was replaced with "component". [6512]
Cover page report in PDF format
The PDF version of the cover page is now updated when cover page settings are customized. [6092]
Crash after saddles were added to cones
A crash has been corrected that occurred in some cases when saddles were added to a vessel and when at least one saddle was placed on a cone with an additional cone between the two saddles. [6386]
Crash when adding a blind to an ANSI flange
A crash has been corrected that happened in some rare cases when a blind was added to an ANSI flange that was attached to a nozzle, a temperature too high message was issued, and then the dialog changes were canceled. [6447]
Crash when editing a nozzle with a bolted cover closure
A crash has been corrected when a nozzle was edited that had another nozzle attached to the parent nozzle's bolted cover closure. [6091]
Crash when editing skirt dimensions
Additional sanity checking is now present in the skirt dialog to prevent a program crash. For skirt designs based on outer diameter, the intermediate skirt calculation is now aborted if dimensions are entered that result in a skirt thickness that yields a negative inner radius (i.e. skirt thickness is larger than skirt outer radius). The dialog can not be closed and the skirt design thickness will not be reported in the dialog until the dimensional issues is addressed. [6436]
Crash when placing a head on a nozzle
A crash has been corrected that occurred while a head was being placed on a nozzle. On the Head Dimensions dialog if the Attached To component was changed from a nozzle to any other component, it caused a crash. [6554]
Crash when saving default Set Mode Options
A crash has been corrected that occurred when the Save Defaults option in the Set Mode Options dialog was selected and the test pressure on the Testing page was set at 0 psi. This crash only happened in files created in builds older than 6214. [6528]
Crash while editing nozzle flange
COMPRESS crashed when a nozzle flange was edited and the nozzle offset reference was set to either From top seam of component or From bottom seam of component while no valid parent component existed. [5548]
Deficiency caused by negative ring spacing value
The erroneous deficiency, "The rings in group XXXX interfere with each other because the ring spacing is too small", is no longer reported if a ring group is input with a negative ring spacing. [6500]
Dished cover bolt size in rating mode
When in rating mode the bolt size for dished covers was forced to meet the required bolt size. This could prevent the evaluation of an existing dished cover. [6445]
Dished cover PWHT setting - Apply to vessel
For a dished cover when the post weld heat treatment (PWHT) is activated, the option to apply PWHT for the entire vessel is now available. This option is already available for other vessel components. [6599]
Excessive required thickness due to lining
When a file is first opened, an excessive lining weight could be calculated for variable radius components. This could result in an unnecessary thickness increase due to weight, wind or seismic loading. The cause of the thickness increase was difficult to trace as corrected weight values were determined and reported when the vessel was calculated. This issue was corrected in Build 6250 released in September 2006. [6261]
Flange operating liquid weight
The operating liquid weight calculated for Appendix 2 weld neck flanges on vertical vessels did not account for the specific gravity of the operating liquid. The specific gravity for the test condition was incorrectly used to determine the liquid weight for the operating case. [6623]
Formed heads - Maximize MDMT / No MAWP option switch
For formed heads, the Maximize MDMT / No MAWP option switch now correctly uses the design pressure plus any static liquid head when determining the UCS-66.1 stress ratio. When this option is active, the MAWP is set to the design pressure to maximize the MDMT rating. Previously, this option was not reducing the head MAWP to the design pressure; therefore, there was no change in the rated MDMT. [6482]
Formed heads report - Insulation and lining
The appropriate section is no longer reported when insulation and\or lining is not attached. Previously, each section was reported with zero values. [6568]
Forming strain paragraph reference UHA-44 / UNF-79
The forming strain reference in head reports was incorrectly referring to paragraph UHA-44(a)(2)(a) or UNF-79(a)(2)(a). The correct paragraph reference is UHA-44(a)(2)(b) or UNF-79(a)(2)(b). This has been corrected for all head types. [6478]
General Arrangement Drawing crash
An internal error has been corrected that would cause a program crash in rare instances when the GA drawing was created. [6553]
Home page button on the Browser toolbar
Previously, the button labeled Index on the Browser toolbar navigated the browser to the homepage set in Internet Explorer. The Index button now navigates to the report cover page. [6391]
Hydrostatic test summary report error
An error has been corrected where the allowable compressive stress was reported instead of the allowable tensile stress. This could result in a stress excessive indication. This problem would only occur in isolated circumstances and was limited to a small subset of components, such as head straight flanges or sump heads. [6497]
Incorrect top seam elevation displayed in 3d view
A problem has been corrected that caused the top seam elevation in the vessel 3d view to be displayed incorrectly. The dimension previously showed the wrong sign when the Datum Line was se to the top\left seam and a non zero Offset from datum seam was specified. [6503]
Leg bracing report in metric units
For braced legs in metric units, a reporting issue has been corrected where the metric and English units were transposed. In addition, the metric conversion for the radius gyration was incorrect. [6615]
Lift lug - Location from hole centerline
The lift lug offset value is now input to the hole centerline instead of to the right / bottom side of the lug. This makes locating lugs much easier particularly on heads and simplifies the task of obtaining symmetrically located lugs. [6166]
Lift lug - Rotational lift WRC-107 calculation
For vertical vessels that have a rotational lift calculation, the WRC-107 lug attachment stresses are now performed for every lift angle from 0 degrees to 90 degrees. Note that only the governing case is reported. Previously, the lug attachment stresses were only analyzed at the lift angle coincident with the maximum lug stress. [6496]
Lift lug - Sanity check on maximum load angle Beta
A new dialog check is now present that prevents the input of a maximum load angle (β) that has no positive vertical component. Previously, this type of input could result in a crash. [6154]
Lift lug rotational lift - Distance to center of gravity
For a rotational lift calculation with a tailing lug on a flared skirt, the distance from the center of gravity to the lower lift point (l₂) was reported with a slightly different value in the tail lug report versus the top lug report. [6385]
Lift lug stress dialog - MKS units
In the Lift Lug Allowable Stresses dialog for MKS units, an issue has been corrected where an input stress value incremented slightly each time the focus was changed to a new input (i.e. each time the Tab key was selected or the mouse was used to select another input field). For some Windows locale settings, this resulted in a conversion error and prevented exiting of the dialog. [6506]
Lifting lug sketch - Scaling and centering
To prevent off-center or outside of the bounds sketch issues, a more robust solution is now present in the scaling and centering of ear type lifting lug dialog and report sketches. [6169]
Longitudinal MAWP calculations due to seismic
For the longitudinal MAWP calculation for the seismic condition, the required thickness due to weight (t_w) term did not properly account for the vertical acceleration term. This applies to cylinders and cones. [6504]
Maximum allowable bolt material temperature check
When initially creating a nozzle with an ASME B16.5/16.47 flange, the maximum bolt material temperature is now checked before exiting the flange dialog. Previously, a warning deficiency was reported, and the bolt temperature check was performed the next time the flange dialog was accessed. [6655]
Minor text errors in the ASME U-1 form
Various minor text and punctuation errors have been corrected in the ASME U-1 form. [6562]
No thicker tubes… deficiency
For a cylinder specified as a tube material with a thickness that exceeds the values in TEMA Table D-7, the deficiency, "No thicker tubes for the specified diameter could be found. The thickness has been set to the governing design thickness with pipe undertolerance added, if applicable", was reported although no change in the cylinder design thickness was made. A warning is now issued in the Deficiencies Summary instead of the previous error. The warning states, "The thickness exceeds standard tube thickness values per TEMA Table D-7." [6572]
Nozzle dialog status bar
While editing or creating a nozzle, Invalid Component instead of Top of Vessel is now shown in the nozzle dialog status bar if the nozzle is positioned over an invalid component such as a body flange. [6113]
Nozzle flange updated on dialog cancel
If an ASME B16.5\B16.47 flange on a nozzle was edited, an error occurred when the OK button was clicked, and the Cancel button was selected, the flange was incorrectly updated with the changes instead of reverting back to the original values. This problem only occurred if an error message was displayed when the OK button was selected. [6449]
Nozzle maximum rated pressure of zero
In rare circumstances, the rating of a nozzle's MDMT erroneously resulted in a de-rate of the nozzle's MAWP to zero. [6388]
PDF report header / footer font size
The Header / Footer Font Size value on the PDF Report Options dialog now functions correctly. Previously, it was not affecting the font size. [6630]
Piping Detailed Geometry report - Spelling error
A spelling error in the piping report line "Present during hydrotest" has been corrected to read "Present during hydrotest." [6580]
Seismic Code UBC 1991 and 1994 Soil Profile input
A Soil Profile input of S4 is now allowed in the UBC 1991 and 1994 seismic dialog. Note that this does not affect the calculations as the Site Coefficient (S) is input independently and the Soil Profile is only output in the XML file. [6567]
Set Mode Options - Deactivating calculate MAWP or MAP options
The Set Mode Options dialog prevented disabling the Calculate MAWP switch on the Calculation page without closing and reopening the dialog after changing the test pressure basis from vessel MAWP. A similar issue existed for the Calculate MAP switch when the test pressure basis was set to calculated test pressure per UG-99(c). [6612]
Skirt vortex shedding moments
The bending moment used in skirt calculations for vortex shedding was always from the operating case. This has been corrected to use the appropriate moment for the operating, vacuum, and empty conditions as applicable. [6476]
Studding outlet interference with rings deficiency.
In some cases when a studding outlet was close to a ring, an unnecessary deficiency was generated. This happened when the distance between the edge of the studding outlet and the ring was less than the studding outlet thickness. [6452]
Support lugs - Metric reporting error
In the detailed support lug report, the weight (W) reported was in kg instead of Newtons. This was a reporting error only and did not affect the calculations. [6469]
Tailing lug on an internal head crash
Improvements to the tailing lug location options corrected a crash that occurred when a tailing lug was added to a vessel with an internal head located below the center of gravity. [6423]
Text size adjustment with Internet Explorer 7
The ability to adjust the report text size using the Ctrl key plus the mouse scroll wheel has been enabled with Internet Explorer 7. In previous builds, this functionality was broken if Internet Explorer 7 was installed. [6595]
Transition "not adequate to resist compressive stress" deficiency removed
For transitions while in the Rating Mode, a compressive stress sanity check has been removed that sometimes resulted in the deficiency

"This transition is not adequate to resist compressive stress due to weight+bending. It is overstressed in the un-pressurized condition"

This check was unnecessary as it was replaced several years ago by detailed required thickness calculations. [6488]
UCS-68(b) error message text
The error message box, UCS-68(b): MDMT is colder than -550F and the coincident ratio is >= 0.35 so PWHT is mandatory, now shows the correct degree symbol instead of the HTML code (°). [6430]
UG-84 Impact test exemption temperature
For any vessel files designed with ASME 1998 Edition A98 or before, the UG-84 impact test temperature exemption was not applied to any applicable carbon steel components. This affected both Division 1 and Division 2 designs. [6648]
Vacuum modulus error for HT-1
A typographical error has been corrected in the ASME.MDB for the vacuum chart modulus at 6500F for chart HT-1. This error resulted in the error message "Vacuum modulus information missing in ASME.MDB in table HT-1" when opening a file with a material assigned to vacuum chart HT-1. [6446]
VDP file export error
When saving a COMPRESS file with IBC 2006 specified for wind and/or seismic and the Export to Drafter option active, the error "Specs in VDP_File_Save needs to be updated-internal error" occurred. [6477]
Welded flat cover between an ellipsoidal head and cylinder
A crash has been corrected that occurred in rare cases after inserting a welded flat cover between a head closure and cylinder. This crash prevented the file from being re-opened if it was saved in this state. Note that this type of model is not supported by COMPRESS and results in improper pressure chamber identification. [6556]
XML file - Chamber MAWP
In the XML output file, an issue has been corrected where the chamber MAWP reported could be incorrect. This issue was isolated to the following conditions:
XML file - Flange required thickness
A XML file correction is available for Appendix 2 flanges where the value reported for <requiredThickness> no longer deducts the flange bore corrosion allowance. In addition, the design and required thickness values for internal and external pressure are no longer reported for flanges. [6678]
XML file - Saddle rings
The XML data file now includes information about saddle stiffener rings. The ring data is only listed once, regardless of the number of saddle rings. [6559]

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Build 6252 changes

New Features

ASME Section VIII, Division 1 2006 Addenda
COMPRESS has been updated to include the 2006 Addenda of the ASME Code. The following additions and changes were made to COMPRESS:
(1) The materials database now includes all applicable ASME Section II, Part D 2006 Addenda data for both Customary and Metric editions. This includes all materials from Tables 1A, 1B and 3. In addition, Table U (tensile strength), Table Y-1 (yield strength), Tables TE-1 through TE-5 (thermal expansion coefficients), Tables TM-1 through TM-5 (elastic moduli) and all vacuum charts have been updated. A change in philosophy has been made concerning how Tables TE-1 through TE-5, TM-1 through TM-5, and vacuum charts are maintained. Starting with the A06 addenda, these charts will be maintained on an Addenda basis. Previously, all changes were retroactive (i.e. most recent data was used for previous Addendas).

(2) Table U-3: ASME B16.5 2003 Pipe Flanges and Flange Fittings is now used for designs with A06 Addenda or later. All pressure-temperature ratings and material groups have been updated to reflect the 2003 Edition.

(3) UW-2(a): A warning is now issued in the Deficiencies Summary if lethal service is specified and welded pipe or tube is used in the design. ERW pipe or tube is not permitted for lethal service applications.

(4) UCS-79: For Table UCS-23 P-No. 1 and Group No. 1 or 2 materials, the extreme fiber elongation is allowed up to 40% when none of conditions (1) through (5) exist. Condition (2) now prohibits this allowance if the material specification requires impact testing. For nozzles and formed heads, COMPRESS checks to see if impact testing is required per the specification by using the materials listed in Figure UG-84.1.

(5) Part UHX Rules for Shell-and-Tube Heat Exchangers have been revised. An overview of the changes follows:

- Rules for the design of hemispherical channels are now present. This channel configuration will be implemented in a future release of COMPRESS.

- For differential pressure, UHX now mandates P_s and P_t to be assigned based on a differential design pressure. A new differential design pressure input is now available when the Use Differential Pressure option switch is activated. A deficiency is reported if the differential design pressure input is less than the ABS(P_s - P_t) or if it exceeds the greater of P_s or P_t. In addition, components that are exposed to both the shell side and tube side pressures are now designed with the differential design pressure specified.

- For an integral tubesheet in a fixed or floating exchanger, the equation used to calculated the axial membrane stress in the channel and shell have been modified.

(6) Appendix 2-1(a): A mandatory statement is now present that requires the hub thickness of weld neck flanges to meet the minimum thickness requirements in Sub-section A. The hub on weld neck and reverse integral flanges are now calculated as cylinders in COMPRESS. The design thickness is presented in the dialog and enforced while in the design mode. The maximum pressure capabilities of the hub are listed in the Pressure Summary and detailed hub calculations are presented at the end of the Appendix 2 flange report.

(7) Appendix 34: A new mandatory appendix provides additional requirements for the use of high silicon stainless steel materials. The following changes have been implemented in COMPRESS:

- The minimum design metal temperature is limited to -500F and warmer.

- For S30600 materials, the plate material shall not exceed 2 in. (50 mm) and bars and tube material shall not exceed 4 in. (100 mm) diameter. These restrictions are enforced by the size limitations present in ASME Section II-D.

- For S32615 materials, a deficiency is reported if the maximum thickness of the weld exceeds 1/2 in. (13 mm).

- For S30601 materials, a deficiency is reported if the maximum thickness of the material at the weld exceeds 1 in. (25 mm). [6341]
IBC 2006 Wind and Seismic calculations
The IBC 2006 building code is now available for wind and seismic design. The calculations performed are those required by ASCE 7-05, which is adopted in the IBC 2006 by reference. [6324]
Pressure Summary Notes for MDMT Rating
For nozzles with ASME B16.5\B16.47 flanges when the bolts govern the nozzle MDMT rating, the Notes for MDMT Rating in the Pressure Summary now include both the flange rated MDMT and the bolt rated MDMT. [6351]
ASME B16.5/B16.47 Flange nomenclature change
The nomenclature used to designate the class rating for ASME B16.5/B16.47 flanges has been changed from '#' to 'Class'. [6353]
Code Case 2547 - Appendix 2 flange rigidity
Code Case 2547 can now be invoked as an alternative to the Appendix 2-14 flange rigidity calculations for the A05 addenda or after. Either successful experience with a specific design or any method meeting the requirements of U-2(g) is an acceptable alternative. To invoke this Code Case, activate the option switch in the Codes\ASME dialog. [6309]
New Edit toolbar available
A new Edit toolbar is available that contains the Undo, Redo, Edit, Edit Last, Delete, and Insert buttons. This toolbar may be turned on or off on the Toolbar Configuration dialog located in the Window menu under the Toolbars... selection. [6319]
New option to customize PDF reports
A new option is available allowing control over which report sections are included in the PDF report. This new option is activated from the report view by clicking the drop down menu on the PDF report toolbar button or from the menu by selecting Report\Customize PDF Report. [6306]
New undo/redo functionality
COMPRESS now supports undo/redo functionality. While editing a vessel, any previous change to the vessel may be un-done or re-done. This new feature may be activated with the short cut keys Ctrl+Z or Ctrl+Y, selecting Undo or Redo from the Action menu, or by using the quick buttons on the new Edit toolbar. The number of changes stored is defaulted to 90 and may be adjusted on the Environment tab of the Set Mode Options dialog. [6318]
Print commands on the File menu while viewing a PDF report
When Print Report, Print Page, or Page Setup were selected from the File menu while viewing a PDF report, these actions were performed on the HTML report version. These commands are now performed on the PDF version of the report. [6344]
Saddle seismic analysis
For building codes that use the spectral response acceleration at short periods, S_s, the value as input is now used in the saddle seismic analysis. Previously, the value was rounded to zero decimal places. [6355]
Table of contents in PDF format
A table of contents is now available when reports are printed or saved in PDF format. To include a table of contents when saving to PDF format, the Customize PDF Report must be utilized first. [5962]
Vertical acceleration table added to seismic report
A new table titled User Defined Vertical Acceleration Term, VAccel is now available in the seismic report that lists VAccel factors on a condition basis. Previously, VAccel was reported only for the operating and corroded condition. This new table is reported when Consider User Defined Vertical Accelerations is selected for ASCE 7-98 or after and when Consider Vertical Accelerations is selected for building codes previous to ASCE 7-98. Note that for building codes previous to ASCE 7-98, the table title is changed to Consider Vertical Accelerations. [6287]
XML file - Appendix 2 Flange face direction data
The xml data file has been extended to include the face direction for all Appendix 2 flanges. The element tag is 'faceDirection'. [6321]
XML file - flange nominal size U.S. customary units
A new data element is now present in the XML output file for ASME B16.5/16.47 flanges. This new element gives the nominal flange size in U.S. customary units regardless of the unit system selected for the file. [6333]
XML file - Nozzle location data
The XML data file has been extended to include the coordinates of the nozzle end point and intersection point. The new elements are labeled 'intersectionPointX', 'intersectionPointY', 'intersectionPointZ', 'endPointX', 'endPointY', and 'endPointZ'. [6322]
XML file - required nozzle thickness value
The required thickness for nozzles reported in the XML file, 'requiredTn', now excludes pipe tolerance and corrosion. [6348]

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Bug Fixes

Appendix 2 flange - g0 value when attached to nozzle
For an Appendix 2 flange attached to a variable thickness nozzle, the hub thickness (g0) was incorrectly assigned as the thickness at the base of nozzle instead of the thinner thickness at the attachment point. For ring type and slip-on flanges, the hub thickness (g0) is read only so manual correction was not possible. [6337]
Appendix 2 flange report - nomenclature correction
For Slip On Loose, Slip On Integral, and Slip On Full Face Gasket, the lower fillet weld nomenclature has been corrected in the detailed flange report to read h2 instead of h. [6356]
Area available for studding outlets when WRC-107 option utilized
For type 11 and 12 studding outlet nozzles, an incorrect Area available was reported in the nozzle dialog after selecting the WRC 107 option. This error occurred in the dialog only and did not affect the final reported values. [6361]
ASME B16.5\B16.47 flange creation - design temperature
When adding an ASME B16.5\B16.47 flange, the design temperature(s) were initially set to the program defaults (Set Mode\Defaults dialog). This could result in a temperature error if a bolt material was selected that was not acceptable for the default design temperature(s). The flange design temperatures now are initialized to the component to which the flange is attached. [6338]
ASME II-D Metric material notes
When using metric units, the material notes from ASME II-D reported in the deficiencies summary were incorrectly from the U.S. Customary edition instead of the Metric edition.

For example,

Table 1A, note G12: At temperatures above 10000F, these stress values apply only when the carbon is 0.04% or higher on heat analysis. (warning)

was reported when the following note should have been reported;

Table 1A, note G12: At temperatures above 5500C, these stress values apply only when the carbon is 0.04% or higher on heat analysis. (warning) [6352]
Crash when resizing the main toolbar
A crash has been corrected that occurred in certain cases when the main toolbar was undocked and resized. [6339]
Empty rigging analysis report
In Builds 6250 & 6251 the print report dialog may show a rigging analysis item but the report is actually blank. The rigging analysis feature is not currently active in COMPRESS and this was an internal error. [6334]
Importance Factor for Seismic Saddle Calculations
A bug has been corrected that caused the Importance Factor, I, to always be set to 1 in seismic calculations for saddles. This bug only affected builds 6250 and 6251. [6308]
Invalid Province entry available on the NBC Look Up dialog
The NBC Look Up dialog, available for NBC Canada building code selections, contained an invalid Province entry labeled Click Go!. This entry has been removed. [6358]
Lift lug - excessive pad weld stress error
The Deficiencies Summary now includes an error for the case of overstressed lift lug pad welds. Previously, the detailed report indicated the pad weld stress calculation was overstressed, but a deficiency was not reported. [6332]
Longitudinal Seam RT warning - SA-333 Pipe
In the cylinder dialog a check is performed if the selected longitudinal seam RT is Seamless No RT and the material is not a pipe or tube material. This check was not recognizing SA-333 Grades 3, 4, 7 and 9 as being pipe material and was warning about the longitudinal RT setting. [6369]
Material specification impact test temperature in metric units
For SA-333, SA-334, and SA-420 the metric material specification impact test temperature has been corrected. This was a result of COMPRESS's use of a single equivalent metric temperature whereas in ASME II-A there are inconsistencies in the material impact test temperature conversion from English to metric. For example in ASME II-A, the material specification impact test temperature for SA-350 LF2 Class 1 is listed as -500F (-460C) and SA-420 WPL6 is listed as -500F (-450C). [6360]
Materials impact tested per Figure UG-84.1 note (c)
A problem has been corrected that could result in an incorrect impact test temperature for materials produced and impact tested in accordance with the specifications listed in Figure UG-84.1 note (c). This error was uncommon and was due to a match occurring between the ASME page number or line number with another grade. For example, SA-333 Gr 5 happened to be on page 10 in ASME II-D. The 10 in the page number confused the routine used into matching it with SA-333 Gr 10. [6331]
MAWP and Hydrotest pressure on PDF version of ASME U-1A and U-2A forms
Hydrotest pressure in section nine of the ASME form U-1A was not displayed in the PDF version of the form. For ASME U-2A forms, the MAWP information in section 8 and the Hydrotest information is section 9 was not displayed in the PDF version of the form. This has been corrected. [6365]
Relocation of nozzles attached to internal heads
This change corrects an issue that affected nozzles attached to an internal head not marked as an Internal Head with the switch in its dialog. Previously, such a nozzle would be relocated the next time the file was loaded, or the nozzle's dialog was exited via the Cancel button. Nozzles will now maintain their position on these heads. [6372]
Temperature out of range of elasticity tables in ASME II-D
For the case where an elasticity value is not available at the specified temperature from ASME II-D, the last tabulated value is used. In this instance, the following issues have been corrected:
- An elasticity of zero was used in the interim calculation before the report was generated. This could result in an error message, such as, Flange modulus of elasticity not set (internal error) -- Contact Codeware. This did not affect the final calculation when the reports were generated.
- The message box indicating that the given temperature is outside the range of elasticity values would appear numerous times during component editing and report generation. The message box has been removed. A deficiency is still reported in the Deficiencies Summary documenting the elasticity value used in the calculation. [6347]
XML file - Appendix 2 flange slotted design
The xml data file now includes data that indicates if the flange uses a slotted bolt hole design. The new element tag is 'slottedDesign'. [6320]
XML file - base ring chair depth
For Center Bolt Chair type base rings the XML file now includes a value for 'gussetDepth' referred to as Chair Depth in the base ring dialog. [6330]
XML file - Required thickness values
The values reported in the XML file for 'requiredThicknessInternalPressure', 'requiredThicknessInternalPressure' and 'requiredThickness' included any specified corrosion allowance. This has been changed such that 'requiredThickness' values exclude corrosion. New elements have been added for 'designThickness' which is the required thickness plus any specified corrosion. [6303]

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Build 6251 changes

New Features

XML file - nozzle required thickness
Nozzle required thickness per UG-45/UG-16 listed in the Nozzle Summary is now exported to the XML file (See the 'requiredTn' tag in the 'Nozzle' element). [6291]

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Bug Fixes

Nozzle relocation crash
A problem has been corrected that occurred when a nozzle is located from the datum line and the length of a vessel component is modified in a manner that results in the nozzle's attachment point no longer falling on the original parent component. In this situation, COMPRESS automatically relocates the nozzle to a new vessel component maintaining the position from datum line. In Build 6250, this resulted in a corruption of the file and a program crash when performing various functions such as selecting the Cancel option when in an attachment (e.g. nozzle or ring) dialog. [6289]
Tail lug location
A problem was introduced in build 6250 that prevented a tailing lug from being attached to the skirt and allowed attachment to components other than the bottom cylinder. For tailing lugs, the Attached to drop down should include only the bottom shell and skirt. [6292]
Appendix 2-14 flange rigidity deficiency
A problem has been corrected where Appendix 2 flange rigidity check deficiencies were not listed in the Deficiencies Summary. The deficiency was listed in the detailed flange report. This problem was limited to Build 6250. [6290]
Nozzle dialog - Offset L image
The bitmap image in the nozzle dialog for Offset L input was not displayed in build 6250. [6296]
Nozzle relocation crash when loading a file or canceling a dialog
A crash has been corrected that was caused when a nozzle was located over an invalid component such as a body flange or empty space. The file would crash the next time it was loaded or a dialog was canceled out of. Nozzles were placed in invalid locations by length changes or the addition of root components other than the nozzle’s parent component. [6301]
Vessel Wizard defaults - Seismic redundancy factor, rho
A problem has been corrected where the seismic Redundancy Factor, Rho was set to zero when the option switch Use settings from defaults file was selected. This bug affected build 6250 only. [6288]

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Build 6250 changes

New Features

ASCE 7-05 building code added
The ASCE 7-05 building code is now available for wind and seismic design. Highlights of the changes implemented into COMPRESS follow.

2.4.1 Basic Combinations - Load combinations 7 (wind) and 8 (seismic) are now investigated. They specifically apply to the tensile side of the vessel where the uplift forces oppose the vessel weight. These 2 load combinations affect ASCE 7-98 and later as well as IBC 2000 and 2003 and are automatically disabled for vessels created in previous builds. A new option switch Do Not Consider ASCE Load Combinations 7 and 8, located in the Set Mode\Calculation tab, disables consideration of these new load combinations.

Wind

The ASCE 7-05 wind provisions are un-changed from the ASCE 7-02.

Seismic - Ground Supported

11.4.5 Design Response Spectrum - The long-period transition period (T_L) must now be input to determine the design spectral response acceleration (S_a). T_L is determined from ASCE figures 22-15 through 22-20 based on geographic location.

12.4 Seismic Load Effects And Combinations - The horizontal and vertical seismic load effect, E_h and E_v, are now determined per 12.4.2.1 and 12.4.2.2 respectively. The redundancy factor (r) used in the determination of E_h is now an input in the seismic dialog. These changes affect ASCE 7-98 and later as well as IBC 2000 and 2003. The option to continue to use the previous method for determining the vertical acceleration component is still available by activating the Consider User Defined Vertical Accelerations option in the seismic dialog. To maintain calculation consistency for files created in previous builds, user defined vertical accelerations are automatically enabled and a default value of 1 is set for r.

12.8.1.1 Calculation of Seismic Response Coefficient - The lower and upper bounds for C_s have changed. There are now two cases in determining lower bound. C_s can not be less than 0.01 or in the case where S₁ >= 0.6g, C_s can not be less than 0.5*S₁ / (R / I). The upper bound is the same as the previous ASCE edition when T <= T_L. When T > T_L, C_s need not exceed S_D1*T_L / ( T²*(R / I)).

15.4.4 Fundamental Period - The fundamental period determination is only by the Raleigh approximation, as taking the lesser of T and T_a is no longer applicable.

Seismic - Building Mounted

E_h and redundancy factor r implemented as described above. All other changes are to paragraph references only. [6106]
ASME U and NBIC R forms
COMPRESS build 6250 includes a new option for automatically generating and filling out ASME U-1, U-1A, U-2, U-2A, U-3 and U-4 forms. NBIC R-1 forms (repair and alteration) are also included. This new feature supports the National Board's EDT (Electronic Data Transmission) facility allowing you to submit forms to the National Board electronically saving both time and money. Additionally, COMPRESS generated ASME and NBIC forms may be archived using the built in forms database management utility. The COMPRESS forms management utility supports network access and can be used to store all forms and necessary support files as well as generate a National Board Log. The COMPRESS forms capability is accessed from the new Forms option located on the COMPRESS Main Menu. [6280]
Integral forgings - nut relief OD
COMPRESS now includes an option to consider nut relief OD for forged nozzles. This switch is located in the Select ASME B16.5/16.47 Flange dialog and is available for variable thickness nozzle Types 9 and 10. Previously, a nut stop OD was always assumed by COMPRESS. [6152]
Split reinforcing pad option
COMPRESS now offers the option of specifying split reinforcement pads for nozzle types 2, 4 and 8. This new feature functions as outlined in ABSA Information Bulletins IB-05-004 and IB-05-005. To use this option, select the "Pad is Split" checkbox in the nozzle cross section dialog and input the appropriate pad joint efficiency in the input provided. [5810]
User-defined material for skirts
COMPRESS now supports the use of user-defined material for skirts. [4420]
COMPRESS change list
The COMPRESS program date is now present in the COMPRESS history file index. This document can be viewed at any time by selected Help\View History from the COMPRESS help menu. [5897]
Context sensitive help - Effective OD Increments dialog
Context sensitive help is now available for the Effective OD Increments wind dialog. [5384]
Context sensitive help - Nozzle Areas dialog
Context sensitive help is now available for the Nozzle Areas dialog. [6049]
Deficiency dialog
A new option has been added to the Environment tab of the Set Mode options dialog. This new switch, Suppress deficiency dialog, allows the user to suppress the display of the deficiency dialog when the reports are calculated. [6221]
Formed heads - force UG-32 formulas option
The functionality of the Force 2:1 ID heads to use UG-32 formulas and Force F&D heads to use UG-32 formulas options have been changed. The UG-32 equations are now used when the formed head is specified by inner diameter and the requirements of UG-32 are met for the new condition. Previously, the UG-32 equations were also used for formed heads that were specified by outer diameter. [6182]
Full radiographic check for formed heads, welded and bolted covers
Welded and bolted covers are now checked per UCS-57, UNF-57(b) and (c) as required. A full RT check is now performed for formed heads for the longitudinal seam and for the circumferential seam if a straight flange is not present. [6171]
Help Files - license agreement
The Codeware software license agreement is now present in the COMPRESS and Tube Layout help files. [6130]
Lift lug report - distance to datum
The distance from the lift lug to the datum line is now reported in the input section of the lift lug report. [6056]
Packed bed dialog
To further clarify that the Liquid holdup input in the packed bed dialog is the percentage of the packed bed's dry weight, the text of Dry Weight is now included to the right of the input. [6132]
Saddle design using MAWP
The saddles design default is now based on the vessel maximum allowable working pressure. Previously, the design pressure was used as the default setting for new designs. [5689]
Seismic dialog functionality changes
The following changes have been made to the seismic dialogs for ASCE and IBC building codes:

- The Vessel Wizards default file, VesselWizardDefaults.CWD, that is included in a new install now defaults to ASCE 7-05 for both wind and seismic.
- For building mounted building code selections, an upper bound limit warning is now present for R_p. The maximum recommended R_p is 12 for ASCE 7-05 per 13.3.1, and 5 for ASCE 7-98 and 7-02 per 9.6.1.3.
- The importance factor (I and I_p) is now limited to 1.5.
- For horizontal vessels, inputs that are not required are now hidden. [6228]
Seismic vertical acceleration
Seismic vertical accelerations are now included in the cone juncture analysis, Appendix 2 flange equivalent longitudinal loading and ASME B16.5/B16.47 pressure ratings when the Consider external loadings on flange MAWP rating option is active. [6275]
Support leg report clarification
The support leg detailed report heading Axial end load, P₁ now reads Axial end load, P1 (Based on vessel total bending moment acting at leg attachment elevation). [6117]
Support lugs dialog
The nomenclature in the support lugs dialog has been changed to match the report as follows:

- Gusset Separation from S to L_g
- Base Plate Width from W_b to b
- Top Plate Thickness from t to t_a [5694]
User Defined Material context sensitive help
Context sensitive help (F1) is now available for the User Defined Material dialog. [5572]
Warning added for saddle angles less than 120 degrees
COMPRESS will now report a warning when a saddle contact angle less than 120 degrees is specified. Paragraph 6 in Nonmandatory Appendix G of ASME VIII-1states that saddles must afford bearing over "at least one-third of the circumference of the shell." [6212]
Weight summary - vessel center of gravity location
The title for the vessel center of gravity location now includes a lift condition to clarify that this location was calculated for this specific condition (uncorroded with no operating liquid). [6179]
Wind Code and Seismic Code selection lists rearranged
The lists of available wind and seismic codes in the Wind Code and Seismic Code dialogs have been rearranged to group the codes by building code. This change affects the Vessel Wizard Defaults and Vessel Wizard Building Code Loads dialogs as well. [5968]
XML file - nozzle blind covers
The XML output file now includes details for bolted covers on nozzle flanges. This data is contained in the 'boltedCover' element within the 'nozzleFlange' element. [6274]
XML file - stiffener ring orientation
A 'rollOrientation' element has been added to the XML output file to indicate the roll orientation of angle stiffener rings, either 'hard way' or 'easy way'. For other structural shapes the roll orientation is not applicable and N/A is reported in the XML file. [6282]
XML file - support lug data
Additional data items for support lugs are now included in the XML output file. A new Boolean value indicates if the support has a continuous ring (girder) and if not the lug length is included. Also the 'distance to load' value has been added to the XML file. [6161]
XML file - support skirt base ring value
The "Compression Plate Length" value for external chair type skirt base rings has been added to the XML output file (See 'compressionRingLength' in the 'BaseRingData' element). [6098]

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Bug Fixes

Full RT Joint type 2 - circumferential joint efficiency correction
For the case where full radiographic examination is specified on a type 2 longitudinal joint and full or spot per UW-11(a)(5)(b) is not specified on the circumferential seam(s), a joint efficiency of 0.8 is now used in the required thickness (circumferential stress) determination. Previously, a joint efficiency of 0.85 was incorrectly used. [6189]
Limit MAWP to input in Set Mode Options units issue
The units used for the Limit MAWP to input in Set Mode Options were inconsistent with the values found in the reports when using metric units. In SI, the input units were MPa when kPa were required. In MKS, the input units would always use kg/cm² no matter which system of units had been selected. [5656]
User t in Nozzle Summary PDF report
The value in the User t column of the Nozzle Summary PDF report was being set to “&nbsp” when it was supposed to be empty. This has been corrected. [5963]
Anchor bolt check in new condition
In sizing the anchor bolt for a new condition, the area provided by the specified bolt was conservatively taken in the corroded condition. The bolt corrosion is no longer included for checks performed in the new\uncorroded condition (e.g. operating, New + Weight)). [6139]
Appendix 2 flanges - erroneous pipe thickness
A pipe material thickness check was being applied to Appendix 2 flanges which could generate an erroneous message "The nominal thickness minus the pipe/tube tolerance deduction is less than the required thickness". This check has been removed for Appendix 2 flanges. [6269]
Appendix 2 flanges - Minimum weld and maximum offset dimension
For Appendix 2 flanges calculated as loose, the minimum weld and maximum offset dimension (e) are based on t_x which is two times the thickness of the shell nozzle wall required for internal pressure. COMPRESS now includes the operating static liquid head when calculating t_x. [6162]
Appendix 2 flanges - rating mating pairs
The Appendix 2 maximum allowable pressure algorithm has been improved for the case of rating pairs of mating flanges. Adjustments were made to properly account for the maximum pressure ratings when multiple external loads are present (e.g. wind & seismic). Previously, in this situation it was possible that the MAWP/MAP/MAEP value listed in the Pressure Summary would not match the value listed in the detailed flange report. [6211]
Appendix 2 flanges - sporadic crash during F3
A sporadic crash has been corrected that occurred when a bolt was specified that was less than the Appendix 2-2(e) minimum recommended size of 0.5 in (13 mm). [6096]
Appendix 2 loose flange - Minimum weld and maximum offset dimensions
In some circumstances for Appendix 2 loose flanges, an incorrect joint efficiency was used in the calculation of t_x. This could result in incorrect minimum weld size(s) and maximum offset dimension as these are based on t_x which is two times the thickness of the shell nozzle wall required for internal pressure. [6232]
ASCE - seismic A_a default value
The default acceleration coefficient A_a has been changed from 2.0 to 0.1 for the following seismic ASCE selections:

- 7-93 and 7-95 ground supported
- 7-95 building mounted.

An upper limit check is now performed that warns if A_a or A_v exceeds 0.4, the maximum value found on ASCE Maps 9-1 and 9-2. [5624]
ASME B16.47 flange bolts look up
A round off error would cause COMPRESS to select the wrong bolt size in some cases when using the Look up ASME B16.5/B16.47 Dimensions button to enter dimensions for an Appendix 2 flange. [6265]
ASME B16.5/16.47 flange material over written
Some materials used for ASME B16.5/16.47 flanges do not have equivalent ASME Section II-D materials. Examples are A352 LCC, A240 S32750 (some Addenda) and A240 348H.
Cone juncture - units conversion problem in stiffener ring deficiency
Deficiencies reported for cone junctures requiring stiffener are now reported using the correct metric conversion. [6254]
Cone U-2(g) reporting error for external pressure
A reporting error has been corrected for the Cone U-2(g) analysis for the external pressure case where the summary table reported all the final results as zero. Typically, this would only occur when a cone juncture ring was not present. In addition, the title for the detailed calculations has been corrected to indicate that the check is for the corroded, not new, condition. [6276]
Export Model dialog
The Export Model dialog no longer shows the 'Coster' or 'Drafter' selections. To export files for these programs use the Set Mode Options \ Environment dialog. [6141]
General arrangement drawing - blank report
The general arrangement drawing was blank when in html report mode for cases where a new file was created and a report was generated before the file was saved. [6258]
General arrangement drawing - lift lug location
For longitudinal and circumferential lift lugs with reinforcing pads, the dimension to the bolt centerline shown in the General Arrangement Drawing has been corrected. This was only an issue when a lug reinforcing pad was present. [6233]
General arrangement drawing - nozzles on nozzles crash
Some vessels with a nozzle on nozzle crash in the general arrangement drawing module. This is only caused when the parent nozzle is a tilted nozzle on a cylinder or a radial or parallel nozzle on a transition. [6256]
Hemi head weight distribution
The weight distribution algorithm for hemi heads has been improved. This will improve the fundamental frequency calculation and result in more accurate wind and seismic calculations. [6227]
Increase in seismic base shear under lethal service
An error has been corrected for the Seismic Base Shear Calculations for ASCE and IBC Ground Supported codes used in combination with the Lethal Service option. The error resulted in an un-necessary 50% increase in seismic base shear for all ASCE/IBC codes from 1995 on, which was reflected in the report's final result but not shown in the report formula. The ASCE 7-95 Ground Supported with Lethal Service seismic base shear calculation requires the 50% increase per 9.2.7.2.1, and the report has been modified to include the 1.5 factor in the formula. ASCE 7-98, ASCE 7-02, IBC2000, and IBC2003 Ground Supported with Lethal Service seismic base shear calculations now no longer apply the 1.5 factor twice in this case. [6089]
Lift lug material added to report
The material input for the lift lugs is now shown in the lift lug report. [5712]
Mandatory impact test for UHA and UNF bolted covers and Appendix 2 flanges
When impact testing is required per UHA-51 or UNF-65, the impact test switch is now automatically activated for bolted covers and Appendix 2 flanges. Previously, mandatory impact testing was indicated in the Pressure Summary Notes for MDMT Rating but the Impact Tested option switch was not automatically activated in the component dialogs. In this case No impact test performed was reported in the individual component reports and in the Pressure Summary Impact Test column. [6099]
Nozzle deficiency - erroneous UG-37 not adequately reinforced message
For nozzles with attached Appendix 2 flanges where the nozzle is designed for chamber MAWP an erroneous error message could be generated for the nozzle if the attached flange governs the chamber MAWP. In order to generate the error the user would have to cancel out of the nozzle edit dialog. [6148]
Nozzle on bolted cover - reporting error
The Required thickness t_r from UG-37(a) in the detailed nozzle report now shows the correct values for W and t_r including cases where MKS units are used.. This was a reporting error only and did not affect the nozzle calculations. [6131]
Nozzle report - UW-16 weld size summary table
The column heading Required Weld Throat Size is now listed as Required Weld Size when a groove weld is present in the summary table. This was changed as the leg, not throat, size is listed for the case of groove welds. [6168]
Nozzle shear check due to external loads
The vector sum of the external shear loads V_L and V_C is now taken when checking the shear due to external loads on nozzles. In addition, the absolute value of M_t is now used in the torsional shear component. [6185]
Platform wind shear applied below support attachment point
For platforms attached to support skirts, the platform wind shear was being applied to the skirt and the components within the skirt (such as heads). This value is indicated in the "Platform wind shear at bottom" column in the wind report tables. [5373]
Program crash if the platform weight input is zero
Entering a total platform grating, railing and ladder weight as zero could cause COMPRESS to crash. A check has been added to prevent zero weight inputs in the platform / ladder dialog. [6094]
Program crash when adding a bolting material
A crash would occur when adding a bolt product form to the available materials list of a component where a bolt product form is not applicable. Materials with bolting as their product form are now only available when selecting bolt material specifications. [6151]
Program crash with ASME B16.5 flange on type 9 or 10 nozzle
A crash has been corrected that occurred when adding an ASME B16.5/16.47 blind flange to a type 9 or 10 nozzle. [6093]
Regional settings affecting margins in PDF reports
The margins in the PDF reports were being set to zero when the Windows regional setting was set to any region that does not use a period as a decimal separator. [5929]
Render error
In some cases when resuming a Windows session from the login screen, a message stating "Render Error: Cannot get a D3D device for rendering" was displayed. This problem has been corrected. [6160]
Report Index - Cover page and GAD
The cover page and general arrangement drawing report links are now only displayed when the Everything report index is selected. Previously, these were displayed for every report index selection, such as Cylinders & Transitions, Summaries, etc. [6081]
Saddle reporting - governing longitudinal stress at saddle
A more rigorous solution has been implemented to determine which saddle location (right or left) to report for the longitudinal stress at the saddle. COMPRESS now determines the governing location based on the highest ratio of stress over allowable for both tensile and compressive stress. Previously, the governing saddle location was determined from the tensile stress only. This was a reporting error only. [6224]
Seismic base shear distribution
For UBC, NBC and User defined building codes a portion of the seismic base shear is applied to the top of a vessel. COMPRESS was also applying this to the lowest elevation of the main vessel (head). This has been changed and COMPRESS no longer applies a portion of the seismic base shear to the bottom vessel component. [6210]
Seismic shear at support
Under very rare circumstances the weight distribution at the support location was incorrect. This would result in incorrect fundamental period and seismic shear\moment values. A work around was to relocate the support attachment point by a very small value. [6253]
Studding outlet - tapped hole area loss reporting error
In cases where the studding outlet outer radius was greater than the parallel limit of reinforcement and a nozzle inner corrosion allowance was specified, the tapped hole area loss reported in the equation for area available (A) was incorrect. This reporting error has been corrected. [6229]
Support lug test pressure
When specifying a user defined shop test pressure the sum of the horizontal shop test pressure plus vertical field test static pressure was incorrectly applied at the support lug for the test condition. This resulted in an overly conservative design load for the support lugs in this circumstance. [6245]
Support moment due to eccentric loads
The bending moment below the support point could be unconservative if an eccentric loading was applied below the support elevation. The eccentric loading could be due to vertical or lateral loading or the weight of platforms, nozzles or piping being applied below the support point elevation. The support point elevation is considered to be the elevation where the support component is attached to the main vessel. [5796]
Transition weight distribution
The weight distribution algorithm for transitions has been improved. This will improve the fundamental frequency calculation and result in more accurate wind and seismic calculations. [6226]
UG-116 RT marking - No Radiography
The UG-116 RT marking in the Settings Summary now reports None if no radiography is specified on the entire vessel. Previously, RT4 was reported. [6164]
UG-116 RT marking - RT3
In certain cases, RT4 instead of RT3 was reported in the Settings Summary and in the General Arrangement Drawing. Typically, this occurred when Spot per UW-11(b) was applied to an entire vessel with seamless heads. [6138]
User defined wind code warning message
An error message is displayed when the highest elevation specified for a user defined wind code zone is below the top of the vessel. The vessel height shown in this message was reported in inches even when metric units were specified. This message now considers metric units as expected. [6100]
Weld strength reported when exempt
Nozzles exempt from weld strength calculations per UW-15(b)(2) had detailed weld strength calculations reported. The un-necessary text has been removed from the reports. [6103]

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Build 6249 changes

New Features

Appendix 1-6 dished cover - gasket seating condition
The gasket seating condition is now treated as a separate condition when determining design thickness and maximum pressure rating of dished covers. Previously, the larger of the operating or gasket seating moments was used as the basis for M_o in the Appendix 1-6 equations. [5604]
Required UG-116 markings now reported
A section for required name plate markings has been added to the settings summary report. It indicates the radiography (RT1, RT2, RT3 or RT4) and postweld heat treatment required per UG-116. For Division 2 vessels, the postweld heat treatment required per AS-100 is now indicated. [4941]
Standard saddle details dialog - metric units
Metric units may now be specified when creating or editing Standard Saddle Detail records. This option is enabled by selecting the new Use Metric Units checkbox in the "Edit" or "New" Standard Saddle Details dialogs.
Appendix 2 flange - gasket column report
A check has been added to prevent the reporting of an Appendix 2-.5.2 Column II designation for a ring type gasket selection (Sketch 6). [6027]
Appendix 2 flange - rigidity factor
COMPRESS now uses the flange rigidity factors specified in Appendix 2-14 when using the A05 and later Addenda. For Addenda previous to A05 where rigidity calculations where non-mandatory, COMPRESS still provides the option of a user specified rigidity factor. Previously, COMPRESS allowed a user defined rigidity factor to be input for the A05 Addenda which could result in an incorrect factor being specified. [5954]
Appendix 2-14 and full face gasketed flanges
COMPRESS calculates full face gasketed flanges per U-2(g) using the analysis presented in the Taylor Forge Bulletin 502. COMPRESS now offers Appendix 2-14 flange rigidity calculations as a user specified option when calculating full face gasketed flanges. [5989]
ASME B16.5/16.47 flange bolt deficiency
An ASME B16.5/16.47 flange deficiency will now be reported when the design temperature specified exceeds the maximum temperature permitted for the stated bolt material specification. [6045]
Cone juncture deficiencies - rating mode
When in the rating mode, error deficiencies are now reported if the cone juncture rated pressure is less than the input design pressure. [6009]
Cover page settings
The Cover Page Settings can now be accessed through the Actions \ Reports menu. Previously, the Cover Page Settings previously could only be accessed when in report view from the Reports menu. [6072]
Elasticity deficiency clarification
The material deficiency reported when a required elasticity value falls outside of the ASME II-D tabulated range has been reworded. This message is typically displayed when using the Metric Edition of ASME II-D. For example:
FEA-Nozzle results are now included in PDF reports
All FEA-Nozzle results are now included in the PDF reports. Previously, the FEA-Nozzle reports were available in HTML format only. [5931]
Forged nozzles - types 9 and 10
Forged nozzle designations now include the Forged Components Inc. (FCI) designations as well as the Forged Vessel Connections (FVC) designation. [5914]
Full penetration groove weld - nozzles on variable thickness nozzle
Nozzles attached to the thick end of a Type 9 and 10 nozzles were incorrectly limiting the lower groove weld to the thin section of the parent nozzle. A side effect was that both the Groove Welds are Full Penetration and Draw Lower Groove Weld Bevel Out option switches were automatically deactivated when the file was run. [6077]
General arrangement drawing - test pressure
The gauge test pressures and "shop" or "field" are now reported on the general arrangement drawing in the title block test pressure column. Previously, the maximum component local test pressure was reported. [6086]
General arrangement drawing - extended nozzle schedule
The general arrangement drawing now accommodates vessels having up to 130 nozzles. If more than 18 nozzles are present, COMPRESS now generates a second sheet for the additional nozzle schedule entries. To switch between sheets click on the next\last page buttons found on status bar at bottom of the general arrangement drawing window. [6061]
General arrangement drawing - heads on sumps
Heads located on sumps are now shown in the general arrangement drawing. [5798]
General arrangement drawing - radiography and PWHT
The General Arrangement Drawing Design Data section now displays the UG-116 RT marking and heat treatment requirements based on the COMPRESS model. By entering values in the Set Mode => General Arrangement dialog the user can override these values. [5913]
Nozzle MDMT when attached to non-Ferrous components
Nozzles attached to components made of non-ferrous material were assigned design MDMT values from the set mode defaults. Nozzles will now inherit the design MDMT from their parent component regardless of the parent component material. [6080]
Pipe thickness check while in rating mode
When in rating mode, a warning deficiency will now be shown when a pipe cylinder's minimum wall thickness is less than the thickness required by the design condition(s). [5735]
Save changes to Print Report Dialog warning
If changes are made to the print report settings within the Print Report Dialog and the user attempts to close the COMPRESS document without saving, a Save Changes To File? dialog will now appear to prevent the inadvertent loss of those settings. [5703]
Section II-D page and line references
Section II-D material specification page and line number references now include the text "Metric" if the material properties originate from the Metric Edition of II-D. [5911]
Separate Tan-Tan dimensions for multiple chamber vessels
If a vessel has more than one chamber, COMPRESS will now display separate Tan-Tan dimensions for each chamber. The overall vessel Tan-Tan dimension will be displayed as well. The Tan-Tan dimensions can be activated with the "show dimensions" and/or the "overall dimensions" buttons in the main toolbar. [5055]
Standard base plate details look up
The standard base plate detail highlighted will now match the current anchor bolt size when using the 'Standard Base Plate Details look up feature. [5918]
Vessel Wizard - general information default
Default entries for the General Information section on the main Vessel Wizard dialog have been added to the Vessel Wizard Defaults file. The default values can be set by using the Set Vessel Wizard Defaults button on the main vessel wizard dialog and inputting values on the Vessel Info tab. [5813]
XML export file - revision history is now included
The file revision history text has been added to the XML output file. See the <revisions> element near the beginning of the XML file. [5920]
XML export file - saddle foundation load
The operating and test weights supported by each saddle base plate have been added to the XML output file. [5983]
XML output file - hydrotest values
The XML output file now includes both shop and field hydrotest values if applicable. [5987]

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Bug Fixes

Nozzle Schedule and Nozzle Summary Reporting Change
COMPRESS previously listed studding outlet properties under the pad section of the Nozzle Schedule and Nozzle Summary reports. This made it impossible to distinguish between nozzles with reinforcement pads and studding outlets. The studding outlet properties are now replaced with "N/A" under the pad section of the Nozzle Schedule and Nozzle Summary reports. [5432]
Appendix 1-6 dished cover -maximum pressure calculation
When calculating a dished cover's MAWP for cases where it is a function of the flange moment, the operating static liquid head was incorrectly deducted from the maximum iterated pressure. The result was a slightly conservative MAWP and/or MAEP. [5958]
Appendix 1-6 dished cover - operating liquid static head
In the calculation of a dished cover's MAWP and/or MAEP for the case where the value is not a function of the flange moment, the operating liquid static pressure was incorrectly deducted when the vessel support point was located below the dished cover flange location. In this case, the operating liquid is carried directly by the support and does not cause flange separation. [5959]
Appendix 1-6 dished cover - reporting error
For Figure 1-6, sketch (d) dished covers, a reporting error has been corrected where the moment calculated per Appendix 2 was incorrectly reported in the detailed equation M_o = M_o,App2 - H_r*h_r. This reporting error occurred when the result for M_o was negative. [5945]
Appendix 2 - rating pairs of mating flanges
The maximum pressure determination routine has been improved when determining the maximum allowable pressure of pairs of mating Appendix 2 flanges. Previously, the bolt load from the mating flange was taken at the specified design pressure. This prevented the proper de-rating of the mating flange if the flange was not capable of supporting the specified design pressure. [6006]
Appendix 2 flange - design thickness calculation
The tolerance on the Appendix 2 flange design thickness iteration has been reduced to improve the repeatability of the result in most cases. Previously, the design thickness converged on slightly different results depending on the input flange nominal thickness (e.g. 1.9648" versus 1.9651"). This tightening of the tolerance may not provide the improvement for some flange geometries due to the nature of the Appendix 2 equations. [6024]
Appendix 2 flange - error and warning deficiencies
The Ap