PP stamp and National Pipe Bureau WPS
PP stamp and National Pipe Bureau WPS
(OP)
Can you use a Nat'l Pipe Bureau WPS for ASME PP welding? Normally every ASME certificate holder must qualify their own WPS or purchase AWS Standard Welding Procedure referenced in Section IX App. E. Today I heard of a shop that uses pipe bureau procedures only with a PP stamp.





RE: PP stamp and National Pipe Bureau WPS
Technical requirements for a PP stamp fall under ASME B31.1, where Jurisdictional authority falls under ASME Section I for a PP stamp.
RE: PP stamp and National Pipe Bureau WPS
RE: PP stamp and National Pipe Bureau WPS
This is one of those areas where ASME Section I SC had control for many years on PP until enough resistance from B31.1 came along and a compromise resulted in ASME B31.1 having technical responsibility for piping under Section I, and Section I having authority responsibility in terms of Inspector involvement, stamping requirements and data reports.