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Repiping a steam boiler

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Comments

  • gerry gill
    gerry gill Member Posts: 3,078
    excellent looking job. Should purr like a kitten now :)
    gwgillplumbingandheating.com
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

  • JohnNY
    JohnNY Member Posts: 3,291
    Isn't there some down side (venturi effect) to bushing the bull of a header tee?
    And please post the numbers from a combustion test before the draft hood so we know what's going on with the boiler. Sustained low fire makes me nervous when untested.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    jonny88Paul S_3
  • Tinman
    Tinman Member Posts: 2,808
    Great workmanship! My shoulders hurt just looking at that.
    Steve Minnich
  • gerry gill
    gerry gill Member Posts: 3,078
    JohnNY said:

    Isn't there some down side (venturi effect) to bushing the bull of a header tee?
    And please post the numbers from a combustion test before the draft hood so we know what's going on with the boiler. Sustained low fire makes me nervous when untested.

    Hi JohnNY- i can't vouch for the other guys, but i've never experienced any adverse effects from bushing a header tee's take off.
    gwgillplumbingandheating.com
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

  • EzzyT
    EzzyT Member Posts: 1,344
    @gerry gill nor have I.
    E-Travis Mechanical LLC
    Etravismechanical@gmail.com
    201-887-8856
  • JohnNY
    JohnNY Member Posts: 3,291
    edited September 2016
    How would you know?
    I mean it's been said many times in this forum and in seminars...there's that slide Dan shows of a steam boiler illustration and he states there are several things wrong with the piping. One is the header tee being reduced at the bull.
    Personally, I'd like to know there is no appreciable benefit to using a full-size tee and then a nipple and reducing coupling but that's not what I've been led to believe.
    I don't think there is a metering device to test for carry-over moisture in the header but if there is, I want one.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    Hatterasguy
  • ChrisJ
    ChrisJ Member Posts: 16,315
    I feel it depends on how many mains are pulling from the header.

    If only one, it could be a big problem but if you have 2, 3 or 4 mains pulling from the header and their inside area is equal to, or larger than the header when bushed down I don't see why bushing it down would matter as long as the steam velocity is low enough.

    For example, two 2" mains pulling from a 3" header shouldn't have an issue where one 2" main pulling from a 3" header may.

    I don't really know, just trying to picture it in my head.

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • LionA29
    LionA29 Member Posts: 255
    Beautiful work. More like Pipe Porn

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