Combining PQRs - Same Welding Process, Different PQR, Different A-No.

[YMech]

Hello Everyone,

I know similar topics have been discussed but looking for some insight on my particular case.

I have two PQRs

PQR A: Groove weld, GTAW ER70S(deposited thickness: 1/4"), SMAW (Deposited thickness: 5/16"). Base metal: 9/16".

PQR B: Groove weld, GTAW ER80S (deposited thickness: 1/8"), FCAW (deposited thickness: 1-1/8"). Base metal: 1-1/4"

Per QW-200.4, can I combine these two PQRs to make a WPS using only the GTAW process? The filler metals have different A numbers, which is an essential variable. I would take these two processes separately to determine deposited thickness.

Basically, I need to weld a partial penetration groove weld with a cover fillet using only GTAW, but need my base metal thickness range up to 2.25" thick and my total weld deposit thickness range up to 3/8" thick.

 

[DVWE]

Have a read of QW-202.2(c) and see if you can apply that to your situation.

Sorry, I re-read that and understand what you're asking now. Can you clarify though, the title says the filler metals have different F-No.s, but your post says A-No.s.

 

No

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[gtaw]

Too many unknowns to say with any certainty. Using E70S-X filler metal you can weld up to 1/2-inch using just GTAW, so why are you trying to combine the two PQRs? Are the base metals within the same P-number group? Are you going to perform PWHT (even if it isn't required? The F-numbers for both the E80S-X and the E70S-X are the same. Can't tell a thing about the A-numbers without knowing whether there are alloy additions to the E80S-X. What A-numbers are assigned to the filler metals by the manufacturer. What is the chemistry of the base metals, i.e., are you welding dissimilar base metals?

Details man, we need details.

Best regards - Al

 

[YMech]

DVWE and gtaw,

My title was incorrect - I meant A-numbers (it's fixed now).

I need to do a repair, replacing a 3/4" couplet onto a 2.25" thick vessel. PWHT would not apply. Same p-numbers on the material. PQR A uses ER70S-2(A #1), PQR B uses ER80S-D2 (A#11)

The reason I am looking to combine the procedures, and use both filler metals in the same weld, is so I am covered on the base metal thickness and weld deposit thickness.

Also - I'm a lady

 

[r6155]

Why a replacement? What happened? Are you sure that now it will be done well?

Why partial penetration weld?

More details ? ASME VIII Div.1 was the original code?

Regards

 

[DVWE]

Per QW-200.4, can I combine these two PQRs to make a WPS using only the GTAW process?

I don't think so. Because of the different A-No.s, each A-No. is only qualified for the weld metal thickness and base metal thickness for each.

The devil is in the details; she also wears prada.