Pressure Vessel Internals, Attachments, Clips and LugsPaul Daniel2019-03-14T14:01:40-04:00
Pressure Vessel Internals and Attachments
The COMPRESS Attach Menu allows designers to quickly include the mechanical effects of pressure vessel internals and attachments in their designs. It is also used to analyze common pressure vessel details such as clips and lugs. How COMPRESS deals with individual attachments varies depending on its type and location as described below.
Platforms, Ladders, Insulation and Piping
Adding attachments directly to a pressure vessel, including platforms, ladders, piping and insulation, adds weight and increases the vessel’s projected area and wind loads. In these cases, COMPRESS takes the attachment’s details and calculates its contribution to the vessel’s mass distribution, horizontal shears and overturning moments. The attachment loads are then combined with all other specified loads due to pressure, weight, wind and seismic in the final COMPRESS design report.
Trays, Packed Beds and Linings
Adding pressure vessel internals such as trays, beds and linings adds weight but does not increase the vessel’s projected exterior cross sectional area. COMPRESS uses the specified internals to calculate their contribution to the vessel’s mass distribution and period of vibration. This in turns flows through the combined weight, wind and seismic horizontal shears and overturning moment calculations as required.
Clips and Lugs
A very handy option on the COMPRESS Attach Menu is the ability to perform a local stress analysis on small attachments such as clips and lugs. The local loads and geometries specified are analyzed using WRC 107 / WRC 537.
The COMPRESS Attach Menu feature:
Lets you add as many attachments and internals as you want
Allows you to specify if attachments and internals are present in the empty, test, lift and shipping cases
Calculates the effects of the load combinations on pressure components such as cylinders and transitions
Determines the attachment’s and internal’s effects on pressure vessel supports including skirts, legs and lugs
Calculates the attachment’s and internal’s effects on skirt base rings, leg base plates, anchor bolts and foundations
Performs WRC 107 / WRC 537 local stress analysis on clips and lugs
A new feature that speeds up the process of pressure vessel modeling.
Software packages like COMPRESS exist to increase productivity and save Engineering hours.
Perform ASME UHX and TEMA calculations and transfers these designs to your estimating and drafting departments.
Many companies use the alternative rules of Division 2 because of the cost savings, versus Division 1.
MDMT Rules of UCS-66
The rules of UCS-66 guard against vessel failure by brittle fracture, a low probability high consequence event.
Pressure vessel FEA is more accurate than the methods of WRC-107, WRC-297 or WRC-537.
The Vessel Wizard speeds pressure vessel design by creating complete pressure vessel models with minimal input.
Import files from COMPRESS and create user customizable pressure vessel cost estimates in spreadsheet format.
Create optimized Appendix 2 (custom or body) flange designs with minimal time and effort.
Designers can visually confirm good practices such as staggered longitudinal seams.
Lifting & Rigging
Use an accurate weight, the correct center of gravity, and apply the actual section properties.
Modeling + Drawings
The Codeware Interface includes Drafter 3D, a feature that auto-generates 2D pressure vessel drawings.
COMPRESS implements a wide range of related engineering methods, codes and standards.
Save time by reducing the trial and error iterations that would otherwise be required when designing pressure vessels.
Rating (Analysis) Mode
The COMPRESS Rating Mode takes your design and determines the vessel’s MAWP, MAEP and MDMT.
Performing hydrotest stress calculations in the design stage prevents equipment damage during hydrotesting.
COMPRESS saves time by calculating chord openings and governing planes of reinforcement automatically.
Older ASME Codes are retained in all COMPRESS releases so you can always use the latest software.
Automatic Liquid Levels
COMPRESS eliminates the need to manually calculate each vessel component’s liquid static head.
Global External Loads
The Loads Menu allows designers to easily consider global external loads when sizing pressure vessel supports.
Clips and Lugs
Designers can quickly include the mechanical effects of pressure vessel internals and attachments in their designs.
Certain industrial processes require pressure vessels with multiple chambers operating under different design conditions.
Produce more economical Div 1 pressure vessel designs with increased accuracy from the Div 2 design by rule equations.
Manufacturer's Data Reports
Simplify the creation, submission and management of ASME Manufacturer’s Data Reports and NBIC Repair and Alteration Forms.
Support Skirt Openings
Specify piping connections to vertical vessels that require additional piping and openings cut out of the support skirt.
Foundation Loads Summary
Break down the loads for the specified vessel operating conditions including weight, wind, seismic, and vortex shedding.
UG-80 and UG-81
COMPRESS automatically provides out-of-roundness tolerances that must be maintained during pressure vessel fabrication.