Calculate ASME B31.3 process piping design pressure for low pressure steel pipe (Table A-1), high pressure steel pipe (Table K-1), and plastic piping.
The design pressure is calculated from the pipe diameter, wall thickness, wall thickness tolerance and allowable stress (Table A-1 and Table K-1 US values : US units govern). The hoop stress is equal to the design stress at the design pressure. Change units on the setup page. Stress values can be extrapolated for temperatures above the data range (care is required when using extrapolated values). For combined internal and external pressure, the design pressure equals the pressure difference.
Use the Result Table option to display a table of design pressure versus wall thickness or design pressure versus material type. Use the Data Plot option to plot the design stress versus temperature for the selected material. Use the Data Table option to display the data table in the popup window (Table A-1, or Table K-1). Refer to the help pages for notes on the data tables (click the resources button on the data bar). Use the workbook ASME B31.3 data tables to look up allowable stress data.
Note : The choice of high pressure versus low pressure service is at the discretion of the owner (section FK300). The ASME B16.5 Class 2500 pressure temperature rating for the material group is often used as a criteria.
Reference : ANSI/ASME B31.3 : Process Piping (2018)
Change Module :