Root weld repair directly from the inside
Root weld repair directly from the inside
(OP)
I want know if there is any prohibition against making a repair on header to nozzle weld (8" dia. header x 6" dia. nozzle) to the root side of a butt weld that was made from one side when a flaw, such as incomplete penetration, is discovered? Can anyone give a supporting documents base on code? Our client request us to do repair from the outside. Thank you.





RE: Root weld repair directly from the inside
Pretty sure you will find nothing prohibiting it in any codes but generally you have to have a qualified repair procedure for it.
Small repairs (internal touch ups) can sometimes cause the most metallurgical problems if dealing with certain materials.
Regards,
DD
RE: Root weld repair directly from the inside
If SAFE access permits. (FME (exclusion of the welding grit and debris from the clean areas upstream and downstream of the repair, ventilation for the welder, harness and retrieval (or other method in the confined space), continuous monitoring of the air supply, room to operate and weld and grind and inspect ....)
May need scaffolding or support - or might be able to just climb in the PV.
All that being accomplished, it is a dangerous place. Preheat/PWHT, interpass temperatures may be fatally too hot for work.
RE: Root weld repair directly from the inside
RE: Root weld repair directly from the inside
RE: Root weld repair directly from the inside
If SAFE access permits. (FME (exclusion of the welding grit and debris from the clean areas upstream and downstream of the repair, ventilation for the welder, harness and retrieval (or other method in the confined space), continuous monitoring of the air supply, room to operate and weld and grind and inspect ....)"
racookpe1978,
If a welder got shoved up an 8" dia. header I think ventilation would be the least of his worries !
RE: Root weld repair directly from the inside
Might need a little bitty DotCo grinder and burr bit though.