Welding tips and tricksStainless Steel Pipe Root & Purge Tips | Welding Tips & Tricks #Welding #TIG #WeldingTechnique March 10, 2021 - Leave a Comment weldingtipsandtricksWed, March 10, 2021 1:02amURL:Embed:This video demonstrates a laywire technique for a root pass on 3″ pipe. I am using er309 stainless 1/8″ wire because the flange is stainless and the pipe is …