Flanges to Replace DMW
Flanges to Replace DMW
(OP)
I see that on thread 794-330216 davefitz was involved in replacing a dissimilar material weld for Alstom's HP OTC with flanges. I have been asked to look at the same issue. Has a solution been found?
Thanks,
Jack
Thanks,
Jack





RE: Flanges to Replace DMW
Others are using NORSOK 2500 HT flanges, but used F91 for one flange face and inconel 625 mating flange with an inconel 625 seal ring , with forged pipe extensions provided on both flanges. This allows the field weld to be distant from the flange face. They used higher strength bolts that are not in asme sect II.
"Nobody expects the Spanish Inquisition! "
RE: Flanges to Replace DMW