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  1. arvindshakya

    Supplementary coupon of PQR

    You are right Mr. DekDee, but my confusion is whether 12.7mm impact coupon can support 33.32mm not impact coupon. If yes, what will be the qualification range of material thickness with impact.
  2. arvindshakya

    Supplementary coupon of PQR

    But in impact required WPS, thickness range will be T/2 to T+1/4". So, I am confused and i am unable to get any reference which can give higher thickness with impact toughness (as per main PQR with the help of supplementary PQR).
  3. arvindshakya

    Supplementary coupon of PQR

    Dear All, I am having a PQR with PWHT performed on 33.32mm pipe A106 Gr.B (Without impact), can I make a additional test coupon of lower thickness say 12.70 mm with keeping all the essential variable same as earlier PQR. And on basis of these PQR and its supplementary coupon, WPS may get the...

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