Dissimilar Metal Welding
Dissimilar Metal Welding
(OP)
We need to weld a P22 Fitting with 35Ni-25Cr material. DO
we need a buttering layer to have a good quality weld.
Can any one sugest the WPS for this weld?
we need a buttering layer to have a good quality weld.
Can any one sugest the WPS for this weld?





RE: Dissimilar Metal Welding
The typical approach for high temp service would be to butter the P22 fitting with high Ni filler and then PWHT as required.
Then you can make the weld with matching (or suggested) filler and no need to PWHT.
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Plymouth Tube
RE: Dissimilar Metal Welding
RE: Dissimilar Metal Welding
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Plymouth Tube
RE: Dissimilar Metal Welding
Yes, it is a filler metal developed by EPRI and is an upgrade over conventional Ni-base wire for DMW's. The only problem has been limited availability.
RE: Dissimilar Metal Welding
RE: Dissimilar Metal Welding
Do you have access to EPRI documents?
Development of a New Nickel Filler
for Dissimilar Metal Welds and
Repair
1018991
Final Report, July 2009
I can provide further information if you can contact me via ET management.
RE: Dissimilar Metal Welding
14018 - GUIDELINES FOR WELDING DISSIMILAR METALS (1991)
htt
hope this help
S
Corrosion & Rust Prevention Control
RE: Dissimilar Metal Welding
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Plymouth Tube