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P44 PQR / WPS Qualification

P44 PQR / WPS Qualification

P44 PQR / WPS Qualification

I have a question I would like to have cleared up.
         A PQR qualified ASME SB-619 UNS N06022 to itself. The WPS reads P44 to P44 with no UNS number specified. The production material is ASME SB-619 UNS N10276. ASME IX section QW-420 provides instruction for P numbers of the same UNS grouping across the different ASME Spec. numbers but does not clarify having different UNS numbers as being the same P number.Intrepretation : IX-90-36 Question 2 appears to provde a partial answer in that a different UNS number was not allowed to be considered as the same P number to reduce PQRs. This material is being used for a lethal service and we need proper verification of the WPS.

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