Getting water in TIG welds. Help!

[dumbcat2]

I Often Tig Weld 3/4 To 2 Inch Stainless Steel Tubing At My Work Place. Most Of These Lines Have Residual Condensate In Them (they Are Steam Lines). When Breaking A Line And Placing A Coupling On It Water Seeps Out Making It Very Difficult To Weld. Does Anyone Know Of A Sealant Of Some Kind, Which Is Both Heat Resistant And Water Resistant, That Could Be Placed In The Area Where Coupling And Line Meet? Just Long Enough To Run A Bead.

[Sberry]

I dont know if this would help but guys used to jam bread in them, it will flush out later.

[SuperchargedS10]

how about using O/A to heat the piece till it doesn't seep ?

[david_r]

Sberry,
It's gotta be Wonder bread, ha. Reminds me of racing a leaking valve while soldering pipes. Blow out the water, jam everything together, solder it and then spit out the flux you got in your mouth from the first step.

[Mike W]

Bread is a common trick to use.

[MACH4]

I Often Tig Weld 3/4 To 2 Inch Stainless Steel Tubing At My Work Place. Most Of These Lines Have Residual Condensate In Them (they Are Steam Lines). When Breaking A Line And Placing A Coupling On It Water Seeps Out Making It Very Difficult To Weld. Does Anyone Know Of A Sealant Of Some Kind, Which Is Both Heat Resistant And Water Resistant, That Could Be Placed In The Area Where Coupling And Line Meet? Just Long Enough To Run A Bead.

I weld process piping at ADM in Decatur and have used the "bread" method on smaller pipe and I have also made rubber "dams" that can be inserted into larger pipes to stop leaking liguids from getting on the weld area.Hope this helps.
Mike
MACH4

[Rocky D]

Sberry,
It's gotta be Wonder bread, ha. Reminds me of racing a leaking valve while soldering pipes. Blow out the water, jam everything together, solder it and then spit out the flux you got in your mouth from the first step.

Yeah, Wonder Bread....ya wonder why any one would eat it...no food value whatsoever. I've seen time where a couple of loaves were used to stop a leak!