Welding up and re-machining an RTJ ring groove
Welding up and re-machining an RTJ ring groove
(OP)
We have some Incoloy 800H RTJ flanges that we typically order without the ring groove to make thermowells with. Our thermowells have a full-penetration weld between the bar and the flange which inputs enough heat to draw in the flange enough that a ring groove (if already present) will pull out of tolerance. We machine the groove into the flange face after the full penetration weld is complete.
We received an order of flanges that already have the groove machined into the face. Is there a prohibition against welding up the groove, welding the thermowell, and then re-machining the groove into the flange?
Our weld procedure for this material does not require PWHT and the filler is ERNiCrMo-3.
We received an order of flanges that already have the groove machined into the face. Is there a prohibition against welding up the groove, welding the thermowell, and then re-machining the groove into the flange?
Our weld procedure for this material does not require PWHT and the filler is ERNiCrMo-3.





RE: Welding up and re-machining an RTJ ring groove
Simply from code point of view, you can proceed with your proposal.
Cheers,
gr2vessels
RE: Welding up and re-machining an RTJ ring groove