Is there a procedure for single pass Mig welding schedule 40 socket welds for steam pipe? We will see up to 100 psi saturated steam pressure on this line.
I work for a small food manufacturer and our engineer brought in a contractor to install a new stainless boiler for our process. The pipe fitter assembled the associated piping in sch 40 stainless pipe with socket weld fittings. He seemed to have to chase a lot of leaks in a relatively small run of pipe with a lot of weld looking cold lapped. Is this an actual procedure that he just failed to perform properly (he never feathered his starts/stops so I believe that's most of his issue) or did they just throw this together?
I can't seem to find anything about GMAW on socket fittings and even came across a site where the process was not permitted. What's the deal? I feel like a lot more leaks are gonna arise in the coming months once we see some hot and cold cycling. They say they offer a lifetime warranty of the work but I wonder at what cost to our production schedule.
This is the worst joint but you can see others in the picture which I believe are also worrisome.
Welder and settings it was left at.