Combining 2 PQR's for WPS

What does your client say the problem is?

Remarks from client are not clear either.Their point of view is that 1st PQR was with GTAW+SMAW and other one GTAW+SAW so might be the layers for welding sequence have been changed which I have not understood at all.Anyway their concern was that if it would have been in combination of GTAW+SMAW & SAW or GTAW & SMAW+SAW then it would have no issue to use it for GTAW+SMAW+SAW.

It might be simpler to get the specific objection and requirement per customer, and then do what you think is necessary to satisfy the request...

"The customer is always right" / The customer is sometimes wrong.

Choices, choices....

But how hard is it to write a second procedure (just plug in some different numbers), thereby satisfying the customer?

Your Client may have their own Specification that is more stringent that ASME IX essential Variable limits.

The ranges you have specified (maximum 9.6mm for GTAW, 17mm for SMAW and 21 for SAW) are in compliance with QW-200.4 and also QW-451.1 where supplementary essential variables are not applicable. A concern I would have is placing a SAW pass over the 3.5mm GTAW pass - possible burn through. This may have been achieved during PQR test, but production welding variables will need good controls.

If your Client is ExxonMobil, Chevron etc, then a new qualification relevant to scope of welding will resolve this issue.

Michael, comment was given with the reference of QW-200.4 not any specification.Anyway I discussed with my AI and he has different opinion which was new for me.As per his interpretation, the range shall be 5-26.9mm not 5-28 mm.Advantage of using max. base metal cannot be taken because both PQR have GTAW in common, so to avail max. deposit of GTAW ,max. base metal qualification cannot be taken.The range of 5-28 would have been possible if 1 PQR had GTAW+SMAW and other would have only SAW.

For depositing SAW over 3.5 mm, I fully agree that it would have good chances of burn through.After discussion with the client it was agreed that if AI have no problem about this combination then it would be accepted which was in the end easy one.