American Welding Society Forum
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.
Does QW-403.5(b) apply to the welding you will be doing. Is it listed as a "supplementary essential" variable for your process in the code? If yes, do supplementary essential variables apply to the qualification of your procedure?
If QW-403.5(b)is listed as an "essential variable" then it applies always.
Though I could have answered your question more directly, looking at it like this may help.
Thanks for your response and approach in your answer, it did help. Yes, it is listed as a "supplementary essential" in the welding process (SMAW). However, notch-toughness testing is not required which, as I am now understanding, would allow us to proceed with the current WPS.
If you have the variable listed on your WPS then you have to comply. Though being a supplementary essential variable it does not require listing unless you are required to do to a CVN regime. You cannot have it on your WPS and ignore it. You need to rewrite your WPS.
This variable is not listed on the WPS and notch-toughness testing was not applicable in the qualification of this procedure.
My answer of "Yes, it is listed as a "supplementary essential" in the welding process" in the previous response was from reading the welding variables table(QW-253) for SMAW.
This is where my confusion actually began as it shows group numbers as a supplementary essential variable. Being new to the inspection world and really trying to understand Sec.IX, the "P numbers and group numbers" got me side tracked. Our WPS/PQR does not list the variable and through your response and pipewelder1999's response, I have been able to determine (and comprehend) the right course of action moving forward.
And I also agree,You cannot have it on your WPS and ignore it.
Sounds like you have it figured out. Just to be clear about what others have already said, if your WPS specifies it is for P-No. 1 Gr. 1 base metals, then that is all it can be used on. If you want to weld P-No. 1 Gr. 1 and Gr. 2, and notch toughness requirements do not apply, then all you need to do is revise the WPS to include Group 2 or delete the reference to Group Numbers (i.e. mark Group No. as "N/A" on the WPS).
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