The company I work for has a WPS that is for P-1, Group 1 to P-1, Group 1 materials. The WPS was qualified using SA53/ SA106 Gr. B / API 5L X42 materials (all P-1,Gr. 1). We have been asked to fabricate several piping spools that will be of the SA106 Gr. C material which is a P-1, Gr. 2 material. After reading QW-403.5(b), it is my understanding the Gr. 2 material would require a separate WPS because the current WPS is limited to P-1, Gr. 1 materials. Is my understanding correct?
On a side note: The welding process (SMAW) and other variables(e.g., filler metals, thicknesses, etc.) in the current WPS would not change.
If I need to supply additional information let me know.
Thanks,
Todd