PostWeld Heat Treatment (PWHT) dissimilar materials
PostWeld Heat Treatment (PWHT) dissimilar materials
(OP)
Hello,
i'm an engineer working on the piping department of on a power generation EPC contractor company. i'm doing a study on postweld heat treatments (PWHT) possibilities between alloy steel (A335-P91, P22 and P11)and carbon (A106) or stainless steel.
I have not yet found practical information on procedures for performing the PWHT in these joints, either the ASME B31.1(or .3) or AWS D1.5.
Does anyone know how PWHT are conducted in these cases? or, where can i find this information?
Thanks in advance
i'm an engineer working on the piping department of on a power generation EPC contractor company. i'm doing a study on postweld heat treatments (PWHT) possibilities between alloy steel (A335-P91, P22 and P11)and carbon (A106) or stainless steel.
I have not yet found practical information on procedures for performing the PWHT in these joints, either the ASME B31.1(or .3) or AWS D1.5.
Does anyone know how PWHT are conducted in these cases? or, where can i find this information?
Thanks in advance





RE: PostWeld Heat Treatment (PWHT) dissimilar materials
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
so, if i have understood well, it's no possible to weld carbon steel and P91 grade alloy because PWHT "shall be that specified for the material requiring the higher PWHT temperature", so, how is the better way in the practice to weld (or to join -maybe with a flanged union-) these materials?
i'm so lost
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
In this case, buttering can be done on P91 Pipe by using SA335Gr.P11 & P22 Electrodes and conduct PWHT at 760 Deg on Buttering surface.
Then follow the procedure for SA335GR.P11/P22 material welding.
For Stainless steel Welding,Use ENicrFe-3 and conduct PWHT as per P91 Materials.
During welding the Dis-similar materials, Use the filler metal on higher grade side. Sure, the mechanical test will be qualified on PQR.
I Hope Mr.BIGINCH will give us valuable comments on this subject
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
RE: PostWeld Heat Treatment (PWHT) dissimilar materials
We are more connected to everyone in the world than we've ever been before, except to the person sitting next to us. Lisa Gansky
RE: PostWeld Heat Treatment (PWHT) dissimilar materials