Note : The choice of high pressure versus low pressure service is at the discretion of the owner (section FK300). Use the workbook ASME B31.3 data tables to look up allowable stress data. Refer to the help pages for notes on the data tables. Use the Result Table option to display a table of allowable stress versus material type. Use the Data Table option to display the data table in the popup window (Table A-1 or K-1). Use the Data Plot option to plot the allowable stress versus temperature for the selected material. Engineering judgement is required to use extrapolated values above the data range. For temperatures above the data range the stress values can either be constant value from the end point, constant slope from the end point, or zero from the end point. For temperatures below the data range, the stress value is constant (fracture toughness should also be considered for low temperature operation). Stress values are interpolated from the US data tables (US units govern). ASME B31.3 Process Piping Basic Allowable StressĬalculate ASME B31.3 process piping allowable stress (S), yield stress (SYT) and tensile stress (SUT) from temperature for low pressure piping (ASME B31.3 Table A-1) and high pressure piping (ASME B31.3 Table K-1).
