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Albert666
Posted on Thursday, June 27, 2013 - 01:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

a customer had a set of headers off me, he then bought a torque hammer silencer, which didn't match up to my collector, he took the the exhaust to a local stainless exhaust specialist, their version is on the right, proof you can polish a turd, they wrecked my collector and bodged some bends on, needless to say he wasn't too impressed, so he had me make a new collector and pipe that fits, and looks a sight better, also it's the inside of the pipe you pay your money for, they don't purge their pipes, i purge all my welds

theirs

mine
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Natexlh1000
Posted on Thursday, June 27, 2013 - 06:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does purge mean putting inert gas inside while welding?
I guess it would make sense since it's every bit as hot as the outside.
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D_adams
Posted on Thursday, June 27, 2013 - 07:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Stainless steel "sugars" or bubbles if you don't purge the back side of the weld with full penetration. Looks like black sugar is the best explanation, so yes, purging the inside with argon is recommended. Some guys can get away with not purging, really depends on who's doing the welding.
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Albert666
Posted on Friday, June 28, 2013 - 06:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

if you are welding thin gauge stainless tube and want full penetration and want it to last you need to purge it
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Ducbsa
Posted on Friday, June 28, 2013 - 07:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am used to seeing purged welding for dairy and food sanitary tubing and that looks as good inside as outside.
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Albert666
Posted on Friday, June 28, 2013 - 09:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

exactly. you pay for what you don't normally see
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