Welding After Hydro
Welding After Hydro
(OP)
Quick question, is it permissible to weld insulation pins onto 2205 or 904L after hydro test on Section VIII Div. 1 equipment? What are the restrictions on types of welds, tig, mig, resistance, etc. The pins are 3.5" long and the equipment has a long trip to job site and may require us to put on insulation pins depending on where the code stands. Any help is appreciated.





RE: Welding After Hydro
Simple answer is no, not for Section VIII because of impact concerns and the loss of benefit from a hydrostatic test (local yielding of material and work hardening), for new fabrication. There was a request for code revision regarding Sect I on this same issue and the folks from Section VIII shot it down in flames.
RE: Welding After Hydro
How many times have we hear this request from fabricators who try to induce/trick the owner/EPC responsible equipment engineer to "interpret" the code meaning? LOL.
RE: Welding After Hydro
RE: Welding After Hydro
RE: Welding After Hydro
Joe Tank
RE: Welding After Hydro
I am looking for information on this as well for a utility boiler. Does anyone have the specific line in Section 8 that says this?