multiple PQR's- API 1104
multiple PQR's- API 1104
(OP)
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 cover both grade
groups?
3. Or do I just need to attach seperate PQR's one for the
x52 and one for x70?
1. welding x52 to x70?
2. Or is the PQR for x70 good enough to cover both grade
groups?
3. Or do I just need to attach seperate PQR's one for the
x52 and one for x70?





RE: multiple PQR's- API 1104