Find a Pressure Vessel’s MAWP and MDMTPaul Daniel2022-08-29T10:38:21-04:00
Maximum Allowable Working Pressure (MAWP)
The COMPRESS Rating Mode takes your pressure vessel or heat exchanger and determines its MAWP, MAEP and MDMT. Rating Mode is often used when performing post construction calculations such as de-rating in-service pressure vessels and heat exchangers. Some pressure vessel designers like to use it to input different pressure / temperature combinations and let COMPRESS tell them where the ASME® Code errors are. COMPRESS also offers a true Design Mode where you input design data and COMPRESS selects component thicknesses, sizes, placements and optionally also determines MAWP, MAEP and MDMT. You can switch between Rating and Design Modes in COMPRESS at any time.
In Rating Mode COMPRESS calculates the maximum allowable working pressure (MAWP) and maximum allowable external pressure (MAEP) for the given temperatures, materials, equipment geometry, liquid level and other UG-22 loadings.
If the data entered does not meet ASME code requirements, COMPRESS will display the appropriate errors in the deficiencies dialog and identify the affected component(s). In other selected circumstances warnings and good engineering practice reminders are presented.
Some programs refer to this input mode as “analysis” because the software takes your input data and analyses but does not change it.
Simplify the detailing of nozzle attachments with flexible and intuitive nozzle design capabilities.
Speed up the process of pressure vessel modeling with Quick Design mode.
Software packages like COMPRESS exist to increase productivity and save Engineering hours.
Perform ASME UHX and TEMA calculations and transfer 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.
External Pressure Design
Simplify the complexity of
UG-28 rules for external pressure of 15psig and greater.
Design both conventional and half pipe jacketed vessels as a standard feature in COMPRESS.
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/ASME B16.5/16.47 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.
True SOLIDWORKS Models
Sketches, operations and drawings can be manipulated as if the model had been created manually in SOLIDWORKS.
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.
COMPRESS provides a shipping saddle option based on the industry standard Zick Analysis.
UG-80 and UG-81
COMPRESS automatically provides out-of-roundness tolerances that must be maintained during pressure vessel fabrication.
Every pressure vessel is required by Code to have a nameplate. COMPRESS handles this by including a convenient nameplate option.
Quickly enter fatigue data and make performing VIII-2 or Appendix 46 Fatigue Assessments simple.
WRC 537 Nozzle Loads
Check stresses on nozzles using WRC 107 and WRC 537 stress analysis for spherical and cylindrical shells.
Drag-and-drop vacuum rings and quickly see how the external pressure rating changes.