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  • Gallons of water in pipe

    if you have a 20' length of 12" PVC pipe How much water would it contain?
    this is the calculation that I am using is it correct?
    0.785X1X20=15.7 (Cubic Feet)
    15.7X7.48 (Gallons In a Cubic Foot)=117.436

  • #2
    Re: Gallons of water in pipe

    Originally posted by Unregistered
    if you have a 20' length of 12" PVC pipe How much water would it contain?
    this is the calculation that I am using is it correct?
    0.785X1X20=15.7 (Cubic Feet)
    15.7X7.48 (Gallons In a Cubic Foot)=117.436
    Hi,

    The formula for the volume of a tube or cylinder is pi r times length. You need to have all the units the same, though. Radius is half the diameter.

    If you start with feet, then the equation is:

    0.5 x 3.1416 x 20 = 15.71f

    There is 7.480 US gallons in a cubic foot, so you have:

    15.71 x 7.480 = 117.5 gallons - Bingo!

    Comment


    • #3
      Re: Gallons of water in pipe

      20 inch pipe, 41 km ,how much of volume water will be there in gallon

      Comment


      • #4
        Re: Gallons of water in pipe

        Originally posted by mohammed View Post
        20 inch pipe, 41 km ,how much of volume water will be there in gallon
        You can't work in mixed units. Either convert 20" to meters (see below) or convert 41 km to inches and note that 1 (US) gallon =231 in; also note Imperial gallons are a different size.

        20" x 0.0254 m/in = 0.508 m

        Volume of a cylinder, V = (pi/4)*d*h
        (be sure you are using inside diameter of the pipe)
        = 0.785 * 0.508 * 41000 = 8310 m (8.31 megaliters)

        A US gallon is about 3.7854 L, so about 2.2 million gallons
        (divide by 1.2 for approximate Imperial gallons)

        Comment


        • #5
          Re: Gallons of water in pipe

          You can also use diam. x diam. x length x 5.9

          1.0 x 1.0 x 20 x 5.9 = 118 gallons.

          Comment


          • #6
            Re: Gallons of water in pipe

            Originally posted by Unregistered View Post
            You can also use diam. x diam. x length x 5.9

            1.0 x 1.0 x 20 x 5.9 = 118 gallons.
            Just to be clear, diameter and length must be feet to apply this formula. The constant, 5.9, is a rounded value for (pi/4)*(1728/231), where the second term is number of gallons in 1 cubic foot.

            Comment


            • #7
              Re: Gallons of water in pipe

              If i have 500 gallons...,what will be the measurement of the pipe using?

              Comment


              • #8
                Calculation in Ltr.

                How much water contain in 8" Pipe of 91 Mtrs. Length.

                Comment


                • #9
                  Re: Calculation in Ltr.

                  Originally posted by Bipin Kumar Roy View Post
                  How much water contain in 8" Pipe of 91 Mtrs. Length.
                  You must use consistent units. Since 1 L = 1 dm, decimeters may be the easiest choice. 91 m = 910 dm, 8" = 2.032 dm

                  V = (pi/4)*D*D*L = 3.14159/4 * 2.032 * 2.032 * 910 dm = 2951 L

                  Comment


                  • #10
                    Re: Gallons of water in pipe

                    I'm trying to figure out a pvc pipe gas tank for a homemade boat. If I use 6' pipe, 2' long my calculations using the second method diaxdiaxlengthx5.9, I come up with 2.95 gallons. Correct?

                    Comment


                    • #11
                      Re: Gallons of water in pipe

                      Originally posted by Unregistered View Post
                      I'm trying to figure out a pvc pipe gas tank for a homemade boat. If I use 6' pipe, 2' long my calculations using the second method diaxdiaxlengthx5.9, I come up with 2.95 gallons. Correct?
                      Do you mean 6 inch pipe, if so, result is correct.

                      I would be concerned that PVC does not provide adequate chemical resistance for long term storage of gasoline. It might be adequate for occasional exposure as a funnel or something. see: http://jn.nutrition.org/content/136/12/2957.full.pdf

                      Comment


                      • #12
                        Re: Gallons of water in pipe

                        250 dia of pipe with 110 mtr how much gallon of water i can get? thanks

                        Comment


                        • #13
                          Re: Gallons of water in pipe

                          Originally posted by Unregistered View Post
                          250 dia of pipe with 110 mtr how much gallon of water i can get? thanks
                          250 mm diameter? Lets express everything in dm, since 1 dm = 1 L
                          (pi/4)*2.5 dm * 2.5 dm * 1100 dm = 5400 L

                          What kind of gallons? Divide above by 3.7854 L/gallon for US, or
                          4.5461 L/gallon for Imperial

                          Comment


                          • #14
                            Re: Gallons of water in pipe

                            Originally posted by Unregistered View Post
                            if you have a 20' length of 12" PVC pipe How much water would it contain?
                            this is the calculation that I am using is it correct?
                            0.785X1X20=15.7 (Cubic Feet)
                            15.7X7.48 (Gallons In a Cubic Foot)=117.436
                            The calculations ABOVE are wrong.
                            You are moltiplying inches and feet, that is wrong.
                            First you MUST to decide if to work with inches or feet.
                            The answer to this question is actualy 0.109Ft3 of liquid in 20 ft. of pipe of 1in. in diameter or o.488US gal of liquid, as you prefer.
                            How did I get that?

                            0.5sq.x 3.14 x20ft (20 ft is actualy 240in.)
                            0.5sq. is 0.25in. therefore
                            0.25x3.14x240=188.4cub.in.
                            We now convert, so that 188.4cub. in divided by 1728cub.in. = 0.109cub.ft
                            Now the question is, if 7.480gal.= 1cub.ft how much is 0.109cub.Ft
                            7.480 x 0.109 divided by 1cub.ft = 0.488 US gal. of liquid

                            Comment


                            • #15
                              Re: HOW I CALCULAT WATER(P/GALON) IN PIPE LINE

                              1, IF I HAVE 4" DIA x 20 FT LENGTH ON PIPE LINE, HOW MUCH GALON(WATER) IN PIPE LINE
                              2, IF OUR WATER TANK SIZE IS hIGHT 10FT x WIGHT 6ft x LENTH 6ft HOW MUCH WATER/GALAON WATER IN MY TANK.
                              3, IF OUR BULDING HIGHT IS 100FT AND I USE 3INCH DIA PIPE LINE SO HOW PRESSURE IN GROUND FLOOR IN BAR
                              I

                              PLZ EXPLANE FORMAULA FOR WATER / GALON

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