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Pipe Insulation Source

Joe K_2
Joe K_2 Member Posts: 17
Shouldn't 2" insulation be used on steam drop headers. State Supply only sells 1".


  • rep
    rep Member Posts: 21
    Pipe Insulation Source

    What are some good sources for pipe insulation?

  • Brad White_24
    Brad White_24 Member Posts: 28
    Depends on where you are located

    I use Homan's Associates here in MA. Yellow pages of course, but also your national companies (Certain-Teed, Knauf, Owens Corning, Armacell, et. al) should have distributors listed on their web sites.
  • rep
    rep Member Posts: 21
    Any internet

    sources with good pricing?
  • wsdave
    wsdave Member Posts: 97
    Internet source

    I got mine from here:


  • Brad White_25
    Brad White_25 Member Posts: 21

    most model energy codes require (or recommend if "guidelines") 2-inch insulation for steam piping over 1.5 inch IPS.

    If you cannot get that thickness you may have to "nest" the insulation. There are tables to do this, starting with the bare pipe size, adding the first layer and selecting the second layer based on the OD of the first layer. Not always perfect so get a single layer of 2-inch thickness if you can.

    For practical purposes though, that first inch cuts the heat loss to about 1/6th that of bare pipe. The second inch cuts that in half again. Go to four-inch thick and it cuts that smaller number in half again.

    Heck four inch insulation on your piping? You would run out of room and have to move....
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