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  1. designer73

    3/8" tube leaks on our tubesheets

    YES, all of our holes are reamed.
  2. designer73

    3/8" tube leaks on our tubesheets

    The tubesheet material is 3/4" thick and is SA516-70. They are rerolled couple of times when necessary(we know re-rolling is an issue/overexpansion). The tubes are rolled to full roll(thickness of the tubesheet). 12% wall reduction (to the expanders recommended reduction). The holes are drilled...
  3. designer73

    3/8" tube leaks on our tubesheets

    yes, the tubes are leaking at the joint where the tubes meet the tubesheet... and on some of the tubes. and no, there is no pattern.
  4. designer73

    3/8" tube leaks on our tubesheets

    We are currently experiencing leaks on our tubesheets, they are drilled to 3/8 diameter, and have copper tubes in those holes, we are using aire_tool expanding guns and expanding tools, but we cant pin point why we are having so many leaks, any suggestions? mayeb a specific rolling pattern? any...
  5. designer73

    Tube expansion

    We are currently experiencing leaks on our tubesheets, they are drilled to 3/8 diameter, and have copper tubes in those holes, we are using airetool expanding guns, but we cant pin point why we are having so many leaks, any suggestions?

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