thread292-487444
ASME B31.12 [2023], Foreward :
"Material performance factors have been included to account for adverse effect of hydrogen gas on the mechanical properties of carbon and low alloy steels operating within the hydrogen embrittlement range".
"Many material included in ASME B31.3 have been omitted from ASME B31.12 table due to their unsuitability for hydrogen service".
Table IX-5B and 5C (Mf, performance factor):
"(d) For material not covered by Tables IX-5A, IX-5B, and IX-5C, use the allowable stresses in Table IX-1A"
ASME B31.12 [2023], Foreward :
"Material performance factors have been included to account for adverse effect of hydrogen gas on the mechanical properties of carbon and low alloy steels operating within the hydrogen embrittlement range".
"Many material included in ASME B31.3 have been omitted from ASME B31.12 table due to their unsuitability for hydrogen service".
Table IX-5B and 5C (Mf, performance factor):
"(d) For material not covered by Tables IX-5A, IX-5B, and IX-5C, use the allowable stresses in Table IX-1A"