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Thread: Stainless tube

  1. #1

    Default Stainless tube

    Done with school. Starting my first project. I have a set of stainless turbo headers to build anyone have any tips on back purging? Dos dont's tips on cheap tube adapters for sealing and introducing the gas for back purge.

  2. #2
    Join Date
    Dec 2008
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    Arizona
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    812

    Default

    You can buy some relatively inexpensive, but there's no need to unless you just want a new toy. Tape some cardboard over an end, punch a hole in it for your argon hose to enter, put another piece on the opposite end with a small purge hole in it and weld away.
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  3. #3
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    Apr 2010
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    Newport News, VA/Fremont, OH
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    Default

    I've never used anything fancy, either. I do sometimes tape an old clear lens on one end so I can look inside and check for penetration w/o peeling the tape off all the time

  4. #4
    Join Date
    Jun 2006
    Location
    Calgary, Alberta
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    Aluminum foil works well for capping tubes for purging, It conforms around the bends well. I also use aluminum tape quite often.
    Jonny

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  5. #5

    Default

    I love the clear lense idea! No more re-taping for me to check penetration!

    Ur a genius hockey guy nick!

  6. #6

    Default

    Stainless Steel Wool works good to!

    I usaully tape out in the field, foil and steel wool can be easily lost inside a pipe.

    Turn your main piece of tape sticky side out,then add a few small strips to hold it. Else you'll have a mad fitter cleaning off glue.

  7. #7
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    Apr 2010
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    western colo/southeast wisc
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    Default

    cool something i always wanted to do. can you post some pics

  8. #8
    Join Date
    Nov 2006
    Location
    Auckland, New Zealand
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    Default

    Bring your purge hose in the bottom and vent out the top. I purge with about 5 or 6 litres /minute on the flowmetre. Guessing yours reads in cubic feet/hour???, but anyway, if you have too much gas inside, it'll push your weld out, and even if not too that extent, you just use more gas than you need too.

  9. #9
    Join Date
    Jul 2008
    Location
    East Tennessee
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    614

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    Quote Originally Posted by kelzweld View Post
    Bring your purge hose in the bottom and vent out the top. I purge with about 5 or 6 litres /minute on the flowmetre. Guessing yours reads in cubic feet/hour???, but anyway, if you have too much gas inside, it'll push your weld out, and even if not too that extent, you just use more gas than you need too.
    I do the opposite , purge top vent bottom. Argon is heavier than air.
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  10. #10
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    Nov 2006
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    Quote Originally Posted by Showdog75 View Post
    I do the opposite , purge top vent bottom. Argon is heavier than air.
    I've never tried it that way. Was taught many years ago to do it my way, and the welds comply with NZ dairy industry standards, so thats the way I do it. If you follow this link, on page 1, the paragraph titled 'purging procedure' lists the same reason as I was taught. I'm not saying your way doesn't work, just that myself, and many others were taught to do the opposite.

    http://files.aws.org/wj/2006/12/wj200612/wj1206-38.pdf

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