To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

gpm thru 2\" pipe at 50 psi

this table is similar to what Mike was referring to. Dave
· ·

Comments

  • chadchad Posts: 1Member
    gpm thru 2\" pipe at 50 psi

    Wondering what the gpm's are on a open ended 2" pipe at 50 psi? No friction loss or head. Just looking for a rough measurement.
    · ·
  • Mike T., Swampeast MOMike T., Swampeast MO Posts: 6,928Member


    Don't have it with me now, but there's a table in the little black book named Pocket Reference that allows you to estimate GPM from an open pipe by measuring the horizontal distance it takes for the stream to drop x inches.

    EXCEPTIONAL little book.
    · ·
  • ALHALH Posts: 1,790Member
    bernoulli and others

    It's a free jet, pretty close to this (some rounding to get the 4):

    GPM=4*(the square of the diameter in inches)*(square root of the gauge pressure in psi)

    so GPM = 4 * 2^2 * sqrt(50) = 113GPM
    · ·
  • Mike T., Swampeast MOMike T., Swampeast MO Posts: 6,928Member


    Yep. That's exactly what I was thinking of.
    · ·
  • taylor86taylor86 Posts: 1Member
    how did you get the 4

    I was wondering how you got the 4?
    · ·
  • HenryHenry Posts: 511Member ✭✭
    Lenght?

    It does not work like that! Use the B&G System Syzer. Example: 45 GPM in a 2 inch iron pipe, within normal design parameters can pass 48 GPM with a loss of 4.5ft (aprox 10 PSI) per 100 ft of pipe. I looked up a pressure loss table. At 50 PSI ( pressure loss) per 100 FT, it is a flow of 116 GPM which is entirely unrealistic. It surpases the maximum recommended velocity of 10 FPS! The lenght of the pipe is the most important factor, if you are working either with a pump or city pressure on an open system.
    · ·
  • RJRJ Posts: 421Member ✭✭
    gpm

    look up  water flow through hose - Engineering Tool Box   there is a curve.
    RJ
    · ·
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!