Hi, I'm having my 3 kegs welded to put couplers and fittings for heater element on. Luckily a neighbor that likes my beer works at a fabrication/repair facility. I have seen some really nasty welded kegs on here and it gets me nervous. His shop goes on site to repair stainless medical and pharmaceudical equiptment. So I kinda feel better but have never seen his work and feel bad asking for a sample since he is doing it for free. If it's good enough for a lab I'm guessing it should be fine for a keg, right? Do I need to rdwhahb?