Dear all
Pls what is the current thickness requirements for PWHT as per ASME B31.3?
I came across old version of the code, it specifies that PWHT not required for all P1 materials, provided min preheat is maintained at 95deg'C.
We intend welding; 18" sch 80(23.83mm) to ASTM A 106, 24" sch 80(30.8mm), is PWHT required? Cite relevant Code sections Please.
Regards,
Andrew.
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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