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Does Repeating of PWHT require new PQR?

Does Repeating of PWHT require new PQR?

Does Repeating of PWHT require new PQR?

Dear all,
We are erecting a heater for a refinery, complying to the EN norms. The materials to be welded are P9 (pipe) to P22(forging). My PQR is with PWHT at 730 for 2 hours holding time. After hardness testing, one weld found to have high values of hardness. We decided and proceeded to repeat the PWHT (again 730 for 2 hours). Now the supervision requires that I should supply a new PQR with the 2 cycles. As far as my knowledge reaches, and given all the time spent for searching within ALL codes (applicable or not including ASME, API etc), I couldn't manage to find out where this requirement is based. All codes are refering to MINIMUM holding time. Also, whenever I have seen this requirement for more than 1 cycles, this has always been a specific requirement of the material requisition, not code's.

Does anyone have an idea about it?

PS - the statement of EN 15614-1 for the PWHT range of qualification is a bit odd and for lawyers: "par. 8.4.12: ... Where required, heating rates, cooling rates, and holding time shall be related to the product". This, according to my opinion, does not help.

Only best result in absolutely necessary time

RE: Does Repeating of PWHT require new PQR?

I cannot answer your question but I doubt that you will get the necessary feedback in this forum. It is not the wrong forum you selected but I think it is just not the best forum. I recommend to start your thread again on one of the other sub-forums on this site. Your issue is a EN issue but you are looking for any code/standard recommendation. So, I think you get more valuable answers somewhere else here. Just my guess.

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