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Piping Maximum Sq.ft EDR Capacity Question

What is the maximum sqft EDR capacity for a 11/2" blk pipe used as a horizontal main in a two pipe steam system? All of the charts that I can find goes only down to 2".

Comments

  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,490
    Typically,

    2" was the minimum sized used for this application.
    Retired and loving it.
  • Randy Berg_3
    Randy Berg_3 Member Posts: 5


    Dan, this is a old two pipe air vent system, the mains from the header is 11/2".
  • Randy Berg_3
    Randy Berg_3 Member Posts: 5


    This system was installed in 1947.
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,490
    When I put my books together

    I couldn't find any charts from any of the Deadmen books that showed lower than 2". I still haven't found any. Wish I could put a number on it.
    Retired and loving it.
  • Randy Berg_3
    Randy Berg_3 Member Posts: 5


    Dan, It seems that this was the system of choice in this area at the time. There are many of these systems piped the same way, and from what I have been told was installed by the same plumber, which is not alive. This is a two pipe air vent system with Young and Trane convectors. The headers off the boilers are 3" then are reduced to 11/2" mains. The systems do have a main vent on both mains also vents on all convectors. With the help of your book EDR I came up with a total SqFt. EDR of 235 Sq.ft EDR. As you have stasted in your books there is always some new twist on these systems. The systems work great.
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