It is a client requirment that we verify all alloy field welds with PMI to be performed by a third party.Our subcontract performing the PMI has asked for required values for Cr and Mo.The joint is a v - groove sch.80 welded with GTAW/SMAW process so the SMAW cap is the only part being tested.
I...
We will be varifying weld deposit.I know the requirments for P91 are Cr 8.00 to 9.50 % / Mo .85 to 1.05.
With half of the joint being P22 I wonder if there will be dilution that will lower the values?
We have a joint consisting of dissimilar materials being welded together.The material's are SA335 P91 to SA335 P22.The joint is welded with E 9015 B9 electrode
What would be the chemical requirments criteria be for PMI on this joint?
Thanks
QC12