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Steam pipe style convectors

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todd_ecr
todd_ecr Member Posts: 92
I’m trying to size a boiler for a church in upstate NY.  Would anyone know the EDR for something like this?  The individual pipes are 1-1/2”.  They are around 60’ long on each side


mattmia2Intplm.

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  • KC_Jones
    KC_Jones Member Posts: 5,737
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    Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

    1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

    If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    Intplm.
  • Steamhead
    Steamhead Member Posts: 16,832
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    That's a pipe-coil radiator. I know there are charts for these but didn't see them in the site's Heating Museum. I'll keep looking, as I'm sure all the Wall regulars will B)
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • guzzinerd
    guzzinerd Member Posts: 233
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    That's amazing 
    Bryant 245-8 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains.  26 radiators heating up 3800sqf.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 6,920
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    Dan's Books have all these formulae. Start your essential library ✨️ today!  Mad Dog 🐕 
    mattmia2Intplm.
  • ChrisJ
    ChrisJ Member Posts: 15,671
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    KC_Jones said:

    Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

    1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

    If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

    So,
    Roughly 180sqft EDR?

    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • ethicalpaul
    ethicalpaul Member Posts: 5,702
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    I'd like to see an IR video of that heating up. I wonder if the whole thing heats up or just one or two of the pipes
    NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el
    CLamb
  • KC_Jones
    KC_Jones Member Posts: 5,737
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    ChrisJ said:

    KC_Jones said:

    Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

    1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

    If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

    So,
    Roughly 180sqft EDR?

    If each pipe is 60', and it looks like 6 of them, then yes 180 should be the number.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
  • mattmia2
    mattmia2 Member Posts: 9,637
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    why are there vents everywhere if it is 2 pipe? or is it 1 pipe with a condensate return below the water line or to a water seal or something like that?
  • mattmia2
    mattmia2 Member Posts: 9,637
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    It also really should only need one big vent down where that ell and nipple is at the bottom.
  • Steamhead
    Steamhead Member Posts: 16,832
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    mattmia2 said:

    why are there vents everywhere if it is 2 pipe? or is it 1 pipe with a condensate return below the water line or to a water seal or something like that?

    Looks like a 2-pipe air-vent system- pre-Vapor.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    mattmia2
  • dabrakeman
    dabrakeman Member Posts: 552
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    LAOSH (page 123) says for the 1 1/2" pipe Direct Pipe Coils a 6 row 60' would be 3.3*60=198sqft.
    bburd
  • Erin Holohan Haskell
    Erin Holohan Haskell Member, Moderator, Administrator Posts: 2,284
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    Here you go. As seen in The Golden Rules of Hydronic Heating.


    President
    HeatingHelp.com
    ScottSecordelcrossvPC7060Intplm.
  • Kickstand55
    Kickstand55 Member Posts: 110
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    I've seen this at a Church in Manchester, NH. Much of the pipes were patched with clamps and rubber. The building was built in the late 1800's.
    I actually proposed a replacement boiler and to replace the piping or new radiation. Old steam traps abound with nicely painted in silver. Not a scratch on the bolts. There also exists 2 zone actuators and a hot waterside arm heater for baseboard heat. Someone removed 1 section from the boiler. Yup, there was a hole in it. Much water hammer.
    I presented my case and it was denied. Now there is a new boiler. More water hammer than before.
    You get what you pay for.