Which reference provides the primary data for piping material allowable stresses?

Which reference provides the primary data for piping material allowable stresses?

• A. ASME B31.3 Process Piping
• B. ASME Sec VIII Pressure Vessel Code
• C. ASME material stress tables (Appendix A)
• D. ASME B16.34 Valves — pressure-temperature ratings

Answer: (C)

The numbers used to check piping components under pressure come from the material stress tables. These tables list allowable stresses for each material at different temperatures, based on the material’s strength properties and the code’s safety factors. They provide the primary data used to determine what stress values are permissible in design. The piping design code uses those values to perform calculations, but it does not generate them. Other references address different roles: the vessel code governs pressure vessels and has its own data, and valve standards give valve ratings rather than general material allowable stresses for piping. So the source of the actual allowable-stress data for piping materials is the ASME material stress tables, Appendix A.

The numbers used to check piping components under pressure come from the material stress tables. These tables list allowable stresses for each material at different temperatures, based on the material’s strength properties and the code’s safety factors. They provide the primary data used to determine what stress values are permissible in design. The piping design code uses those values to perform calculations, but it does not generate them. Other references address different roles: the vessel code governs pressure vessels and has its own data, and valve standards give valve ratings rather than general material allowable stresses for piping. So the source of the actual allowable-stress data for piping materials is the ASME material stress tables, Appendix A.