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  • Standpipe GPM?

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

  • #2
    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 D² x √P. So, your formula would be 29.7 x 2.5² x √50

    Even at 50 psi, an open butt 2½" should flow almost 1300 gpm
    The most important task on the fireground is the one YOU have!

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    • #3
      Originally posted by CrnkB8 View Post
      Basically GPM=29.7 x D² x √P.
      I usually do that math in my head.
      I am now a past chief and the views, opinions, and comments are mine and mine alone. I do not speak for any department or in any official capacity. Although, they would be smart to listen to me.

      "The last thing I want to do is hurt you. But it's still on the list."

      "When tempted to fight fire with fire, remember that the Fire Department usually uses water."

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      • #4
        Right. Just keep turning the red knob up until steam comes out the windows.
        Even the burger-flippers at McDonald's probably have some McWackers.

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        • #5
          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
          http://www.youtube.com/watch?v=JZdEH...e_gdata_player

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          • #6
            http://tn.gov/commerce/sfm/documents...opdrawings.pdf
            http://www.youtube.com/watch?v=JZdEH...e_gdata_player

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            • #7
              usually about 65 PSI. remember to keep in mind PRV's

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              • #8
                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:

                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, 09:23 PM.
                RK
                cell #901-494-9437

                Management is making sure things are done right. Leadership is doing the right thing. The fire service needs alot more leaders and a lot less managers.

                "Everyone goes home" is the mantra for the pussification of the modern, American fire service.


                Comments made are my own. They do not represent the official position or opinion of the Fire Department or the City for which I am employed. In fact, they are normally exactly the opposite.

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                • #9
                  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
                  "and everyone is encouraged to use Plain, Spelled Out English. I thought this was covered in NIMS training."

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