Using API 1104, if welding from group b (x52) to group c (x70) the welding procedure for the higher strength is to be used. My question is about the PQR. The PQR is only for X70 but do I need a PQR specifically designed for:
1. welding x52 to x70?
2. Or is the PQR for x70 good enough to...
Using API 1104, if welding from group b (x52) to group c (x70) the welding procedure for the higher strength is to be used. My question is about the PQR. The PQR is only for X70 but do I need a PQR specifically designed for:
1. welding x52 to x70?
2. Or is the PQR for x70 good enough to...