PWHT time ASME 1 versus B31.1
PWHT time ASME 1 versus B31.1
(OP)
According ASME 1 the minimum PWHT time for materials P15E (like SA-335 P91) with thickness over 5 inch is 5 hours.
For ASME B31.1 the minimum 5 hours is required already over 2 inch thickness.
Does anybody know why this difference or could this be a typo in B31.1?
For ASME B31.1 the minimum 5 hours is required already over 2 inch thickness.
Does anybody know why this difference or could this be a typo in B31.1?





RE: PWHT time ASME 1 versus B31.1
If there is a typo, it is normally caught early and an errata is issued.