ASME PCC-2 6in welding distance requirement
ASME PCC-2 6in welding distance requirement
(OP)
As per the 3.8 Article 2.1 in ASME PCC-2, it requires to maintain a minimum distance of 6 in between the nozzle attachment weld and the nearest edge of the insert plate butt weld. I am wondering what is basis to select the 6” spacing, not 8 in or 4 in. It seems not to include this requirement in ASME VIII Div 1 code.
Thanks
Abraham
Thanks
Abraham





RE: ASME PCC-2 6in welding distance requirement
A little more info: the nozzle being patched is a 1-1/2" pipe and the other close nozzle is a 6" pipe. The vessel was originally built to the 1977 edition of ASME Code for Unfired Pressure Vessels Division I.
Perhaps someone could recommend another repair method?
RE: ASME PCC-2 6in welding distance requirement
RE: ASME PCC-2 6in welding distance requirement
We had the weld between the nozzle and the shell crack. The crack really turned into a hole as it was more than 1/4" wide in some parts. A weld repair was made but our policy classified it as a temporary repair so now I have to go back and get it fixed. I have questioned why the existing repair cannot be permanent but I suppose those decisions are made above my pay grade.
RE: ASME PCC-2 6in welding distance requirement
RE: ASME PCC-2 6in welding distance requirement
However, having said that, I do not see any reason why a "patch" would be - or even could be! - safer or more correct.
RE: ASME PCC-2 6in welding distance requirement
Repairs, in this case, the patch, made according to ASME PCC-2 are considered safe solutions and the majority are considered permanent repairs.
...
The patch in this case, is a solution if the problem was wall loss. Not a crack, as it turned out not to be. Grinding out the defect and rewelding is an acceptable repair. I also don't understand why Danth3man's company doesn't consider it permanent.