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Cast Iron vs. Mallable for steam and condensate (low press.)

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steve_164
steve_164 Member Posts: 10
in THE MAIN WALL
What are the proper fittings to use on low pressure steam and condensate? I have seen cast iron 250# and mallable 90's. Can you use both?

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  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 19,625


    For low pressure steam standard 125# cast iron fittings have been the standard for years. 150# malleable iron fittings are fine if cast iron is not available, in fact some fitters prefer malleable fittings. The basic difference is you can't break malleable fittings with a hammer and pipe wrenches are less likley to slip on malleable fittings.

    ED
  • Al Corelli_2
    Al Corelli_2 Member Posts: 395
    NYC

    Inspectors in NYC are looking for steam fittings on water and steam boilers.

    Had to change out 1 elbow (had no more steam fittings in the truck that day) at the drip end of a header.

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

    There was an error rendering this rich post.

  • bovide_4
    bovide_4 Member Posts: 161
    wish I knew

    I have an email from the DOB boiler div. chief stating that there is no rule prohibiting malleable fittings on steam. Funny thing is, I have yet to use malleable on steam.
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