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Steam piping question

David Nadle
David Nadle Member Posts: 624
In the attached diagram, the gray pipes represent existing mains, and the black pipes are what would go in with a new boiler.

Is there any reason not to go with diagram B?


  • Daniel_3
    Daniel_3 Member Posts: 543

    B may give you a "wind" of steam that holds water at bay in the center of the header giving some good water carryover into the system. The steam is forced to split and go separate ways in which it does not like to do. A is the best way for dry steam.
  • Brad White
    Brad White Member Posts: 2,398

    Daniel is right, "A is the way". Combine the risers, aim toward the equalizer to move the condensate along and distribute from the common combined header.

    I would ask if there is really a drip leg on "A" on the main heading toward the right, or is that a drafting blip. Nice diagram though.

    With "B" you never really combine your steam forces- each boiler riser will be the primary influence for the main to which it is closest hence less balanced. With "B" your steam will be wetter too.

    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"

    -Ernie White, my Dad
  • David Nadle
    David Nadle Member Posts: 624
    I realized it...

    ...soon after I posted this. Plan B forces steam to head away from the equalizer.

    That is a drip leg. My system is a loop. Both those mains meet at the opposite corner. Each is dripped right next to the boiler. I'm attaching a photo to illustrate. The right side drips down into the wet pipe that comes around the back of the boiler.
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