309 tig wire


Old 02-11-05, 09:40 PM
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309 tig wire

i'm working with 309 tig wire on carbon steel pipe,an open butt weld.finding it very difficult getting a good root in.any advice would be welcomed.i'm also using a back purge throughout the procedure.thanks.
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Old 03-29-05, 06:24 PM
Join Date: Mar 2005
Location: Minnesota
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If you have the end of your pipe taped shut and a hole at the other end the size of your argon supply you should be doing things right there. At your butt joint that should be taped shut 3/4 way around and you should have about 5 cubic feet per minute on your flow meter going to your back purge.As you put in tacks move your tape around. After all your tacks are in do a root between tacks with the rest of the pipe taped. After your root is in and you are on a second pass poke a small pin hole in your tape that is on the opposite end of your argon supply. If your butt joint is not beveled you should open up the joint a little if that does not work then bevel the pipe some. Try this and see if you have any better luck.
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