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  1. Steelersrule

    Welder qualification with no P number??

    I would like to certify my welders with pipe that I already have in the shop. It has no P no. It does have an S no. though. Does it matter for welder quals? My rookie understanding is a p no. will cover an s no. but not the reverse. We are just getting our feet wet with ASME work and want the...

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