ASME IX WPS Qualification - Does qualifying P to S qualify P to P?
ASME IX WPS Qualification - Does qualifying P to S qualify P to P?
(OP)
I have a WPS procedure and the PQR was done using P to S material. What does this combination qualify? Does it qualify P to P material specifically?
The code only discusses what P to P qualifies and what S to S qualifies, but not a P to S combination.
Thanks.
The code only discusses what P to P qualifies and what S to S qualifies, but not a P to S combination.
Thanks.





RE: ASME IX WPS Qualification - Does qualifying P to S qualify P to P?
You must not be working with the latest Code Ed.
RE: ASME IX WPS Qualification - Does qualifying P to S qualify P to P?
RE: ASME IX WPS Qualification - Does qualifying P to S qualify P to P?
In some cases former S number materials were assigned a different P number. If you have an existing procedure qualified using Sx which is now Sy, you can still use these procedures within certain limitations. It's important to note that materials must have a specified minimum tensile strength to be used for procedure qualification. I highly recommend you spring for a current edition of Sec IX and carefully review QW 420.