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ASME rating

Keith_8
Keith_8 Member Posts: 399
in THE MAIN WALL
to check, but who's indirect hot water heaters are rated?

I'm not sure if that interpretation code is being observed in CT.

Keith

Comments

  • keith
    keith Member Posts: 224
    ASME rating

    Maybe some of you guys who do alot of tank work can help me with this.

    A direct fired hot water heater needs to have an ASME rating if firing @ 2 gallons per hour or greater. A storage tank receiving hot water from a direct fired unit firing at the same rate needs to be ASME rated as well. But an indirect hot water heater does not need an ASME rating no matter what the boiler attached to it is capable of firing?

    I know I'm missing something here, what is it?

    Keith
  • Kevin__Flynn
    Kevin__Flynn Member Posts: 74
    ASME

    Actually, here in Massachusetts, any indirect heater or combination of heaters totaling more than 120 gallons and/or receiving more than 200,000 BTU/hr from the boiler must also be ASME Rated. This is in a commercial or multi-family building, not residential.

    Kevin Flynn

    There was an error rendering this rich post.

  • [Deleted User]
    [Deleted User] Posts: 0
    In our CSD-1 area,

    direct fired water heaters, regardless of gallons, w/ inputs of 200 mbh or above need ASME tanks. Indirects or storage tanks w/ capacities of 120 gallons, or more, require ASME. Most tanks marked 120 gallons are actually 119. There is no btu relationship (to my knowledge), for ASME, between the input of the boiler & the size of the unfired tank.
  • tim smith
    tim smith Member Posts: 2,836
    indirects & asme

    I have just been in long discussions w/ our local chief boiler inspector here. The way we see it, if over 119 gallons or if 200,000 btu or more boiler is connected to it and it,s coil is capable of putting out more than 200,000 btus then it must be asme. Now the kicker is, some companies may try to say it's coil does not put more than 200,000 out, usually thats at 180 degrees boiler water. now look at it at 200, 220. all changes then. I think the allowance for a coil rating in indirect under 200mbh is a little hard to verfy unless tested through an independant agency. Tim
  • [Deleted User]
    [Deleted User] Posts: 0
    Tim,

    you keep saying "coil." How about an indirect like the Phase III, which has no coil? If, in fact, ASME is a factor in the tank size vs. boiler input in your jurisdiction: How would they handle that? There is no ASME adopted requirement for indirects/storage tanks, coil or no coil, of less than 120 gallon capacity in our jurisdictions. Even if the attached direct fired vessel has an input of 200 mbh or above.

    I am not aware of an indirect w/ an ASME Stamp.
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