Thread: Standpipe GPM?

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    Default Standpipe GPM?

    Can you get enough water into a type I standpipe to supply 2 2.5 inch hoses both flowing 325 gpm?

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    Yes. Calculating GPM is based on pipe or hose diameter and the pressure at which water is being force through these.

    Basically GPM=29.7 x D˛ x √P. So, your formula would be 29.7 x 2.5˛ x √50

    Even at 50 psi, an open butt 2˝" should flow almost 1300 gpm
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    Quote Originally Posted by CrnkB8 View Post
    Basically GPM=29.7 x D˛ x √P.
    I usually do that math in my head.
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    Read Nfpa 14 for the set up on a standpipe

    If you are talking in a building I think it is 500 gpm out of one and 250 gpm out of all others

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    usually about 65 PSI. remember to keep in mind PRV's

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    Quote Originally Posted by Iessthename View Post
    usually about 65 PSI. remember to keep in mind PRV's
    Are you seriously the same guy that pm'ed me the following:

    Quote Originally Posted by Iessthename
    You immature southern fool. way to represent the rest of us in the country who know how to keep our mouths shut. You make us look like a bunch of malcontent yokels.
    Wow. When you get done with your tutor, send her my way.

    To the original poster......yes.
    Last edited by MemphisE34a; 09-28-2010 at 10:23 PM.
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    Quote Originally Posted by fire49 View Post
    Read Nfpa 14 for the set up on a standpipe

    If you are talking in a building I think it is 500 gpm out of one and 250 gpm out of all others
    that is correct.... just did that in the hydraulics class last night. (500 gpm w/ 100 psi at the top discharge without fd supply, otherwise they are required to have a fire pump)
    Originally Posted by madden01
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