Welder qualification with no P number??
Welder qualification with no P number??
(OP)
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 t's crossed and i's dotted. Any help is appreciated.





RE: Welder qualification with no P number??
RE: Welder qualification with no P number??
RE: Welder qualification with no P number??
RE: Welder qualification with no P number??
Is this my problem then??
I dont have my book with me to check QW-423.1 but will check as soon as I do.
Thanks for input.
RE: Welder qualification with no P number??
A WPS qualified for P-Number base metal is also qualified for the corresponding S-Number base metals, but not vice versa (see QW-420.2 third paragraph). And, if the base metal used for welder qualification conforms to a national or international specification or standard, and it conforms to the mechanical properties and chemical composition of a material that has a P- or S-Number, it may be considered as having the same P- or S-Number (see QW-423.2). That means you can use it and you don't have to revise the WPS to use it. So, you can use S-Number for welder qualification, or even an unlisted base metal if it meets those requirements.
RE: Welder qualification with no P number??
RE: Welder qualification with no P number??
RE: Welder qualification with no P number??