Hardfacing overlay welding - Procedure qualification

[ilkerdburhan]

I have a WPQR for GMAW overlay welding, filler mat AWS/ASME SFA - 5.21 ERCCoCr-A and base material WCB. and I have welder qualifications of this WPQR. However, customer needs filler material to be AWS/ASME SFA - 5.21 ERCCoCr-E.

If every essetial variables are same and only change is the filler material, do I need a new WPQR and welder qualifications for new filler material.

F-no of the filler material's are same (72) acc. to Table QW-432 (ASME BPVC.IX 2023). SFA no is same.
Base material and all other parameters will be the same on WPSes.

Additionally, totally different question, if I do this overlay weld by non-stop automatic welding on a circular pattern, does it count as 1 run, or does every complete turn counts as +1 run. So, for the seat welding of a valve, If I am welding the seat surface on 3 turns, weld height increases on every turn, does it count as 3 runs or 1 run?

 

[EdStainless]

as to your second question, if you are building this up then it is still a 3 pass weld.
All of the rules about interpass temperatures and inspection will still apply.

 

[David3399]

See Table QW-255.1 and subsequently QW-404.12 for the first question.

 

[ilkerdburhan]

See Table QW-255.1 and subsequently QW-404.12 for the first question.

Accordingto Table QW-255.1 "Classification" is essential variable. As I understand classification changes from ERCCoCr-A to ERCCoCr-E. That means procedure qualification is required, am I right?

However for welder qualification "Classification" is not an essential variable according to Table QW-355. I assume that we don't need to qualify welder for the new filler material in this case. Also QW-382.1 (g) tells that qualification one AWS classification within same SFA classification enough, right?

 

[David3399]

Correct.