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X-pando used on pipe 10 years ago...

aircooled81
aircooled81 Member Posts: 205
in Strictly Steam
Anyone have any experience breaking loose pipe 6" to 1/4" that x-pando was used to seal the threads.. No teflon.
I'm not a fan of it, as it does very well at sealing pipemjoints, but I find the nipple will colapse before the joint breaks loose.
You think torching it might break it up, or is something like aerokroil needed? Btw, dont use aero kroil then torch without wiping the aero kroil up first, lol

Comments

  • hvacfreak2
    hvacfreak2 Member Posts: 500
    The instructions on the can say to use a hammer on the joint before attempting to turn the pipe. That stuff is hard but somewhat brittle.
    hvacfreak

    Mechanical Enthusiast

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  • 4Johnpipe
    4Johnpipe Member Posts: 485
    Hammer and try to tighten it a smudge...then it should back off with effort.
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  • Steamfighter49
    Steamfighter49 Member Posts: 24

    will it seal galled threads? Previous tech messed up threads for steam vent.

  • mattmia2
    mattmia2 Member Posts: 11,117

    I'd try rtv before a hard setting dope. If the threads still tighten RTV or even wicking should work. If they won't hold you'll have to hope you can drill and tap oversize or maybe helicoil.

  • Jamie Hall
    Jamie Hall Member Posts: 25,201
    https://forum.heatinghelp.com/discussion/comment/1812665#Comment_1812665

    I'd go with RTV. At the pressures we run, it should seal, provided there is enough decent thread left to hold the thing in place mechanically.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mattmia2
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,772

    from xpando:

    "

    2. Yes, it is possible, but it is more difficult than other materials. Straining the joint with a wrench will not usually work. The proper procedure is to put a strain on the pipe - with a wrench - while at the same time tapping the fitting all around. Striking the joint will break the expansion bond between the surface and the compound and allow the joint to be turned off.

  • Steamfighter49
    Steamfighter49 Member Posts: 24

    any particular brand?

  • Steamfighter49
    Steamfighter49 Member Posts: 24

    must be a no-no, huh?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,772

    Probably will seal an air vent with bad threads but I wouldn't use expando on anything likely needing replacement. Maybe drill and tap to a larger size and use a reducer or bushing if need be.

  • mattmia2
    mattmia2 Member Posts: 11,117
    https://forum.heatinghelp.com/discussion/comment/1812990#Comment_1812990

    Or a nipple and a couple or a nipple and an ell and a straight vent.

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