ASME B31.1 Pipe Joint Combined WPS Question 1

[tc7]

Wasn't sure whether to post this here or on the ASME site, but, since it is a weld question here goes:

This relates to a B31.1 pipe joint for shop fabricated manifolds:
We have a qualified WPS for SMAW on A106 pipe(P-1)with removable backing ring. Now would like to do the root passes with GTAW. We have a seperate qualified GTAW weld procedure for groove butt welds which was qualified on ASTM A515 and A516 plate, and this is also listed as a P-1 in B31.1.
Is it permissable to use my A515 GTAW procedure for a root pass on the A106 Pipe and finish off with my SMAW procedure?

A Code reference would be helpful and thanks.
Tom

 

[metengr]

tc7;
Yes. However, why don't you use the PQR's from each separate WPS and write a new WPS for GTAW (root)/SMAW (fill)?

 

[tc7]

Met-
You're always quick to respond and I thank you very much for your help.

I do intend to write that new WPS for the combination, but I wanted to be sure that the seperate PQR's can "legally" support a two-process procedure without need for qualifying as a new entity.

Can you direct me to a paragraph number in any Code section that will help me convince my naysayers?

Thanks again,
V/VR
Tom

 

[metengr]

Tom;
Review the 2004 Edition of ASME Section IX, Article 2,
QW-200.4

For that matter you should review QW-200.