Water flow from a pipe

Forum about flow calculators available on pipeflowcalculations.com and how to find solution for your fluid flow problem.
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SARmission
Posts: 1
Joined: Mon Nov 15, 2010 8:50 pm

Water flow from a pipe

Post by SARmission »

I am trying to figure out how many GPM's of water from the following information. Can you help me?

Input pressure = 95psi
Water temp = 40F
Pipe type = K-type Copper
Pipe Size 1 1/2 inches
Pipe length = 50feet
Elevation = 15 feet from start to end
There are no fittings to increase friction loss. I do not need an exact number, but a close approximate would be nice.
admin
Site Admin
Posts: 375
Joined: Mon Feb 08, 2010 7:47 pm

Re: Water flow from a pipe

Post by admin »

For elevation of 15 feet, there is hydrostatic pressure difference of 4.572 m x 1000 kg/m3 x 9,81 m/s2 = 44851 Pa = 6,5 psi
With input pressure of 95 psi + patm = 95 + 14,7 = 109,7 psi
Adding hydrostatic pressure 109,7 + 6,5 = 116,2 psi - this is p1

p2 = 14,7 psi - is atmospheric pressure if you have out flow to atmosphere.

Here is the report that I have from using pressure drop calculator at
http://www.pipeflowcalculations.com/pressuredrop/

Also, for outflow to atmosphere I have put K=1

Pipe pressure drop calculator CALCULATION REPORT
1. volumetric flow rate (q): q = 258.84146 gpm US
2. mass flow rate (w): w = 58789.254 kg/h
3. length (L): L = 50 ft
4. diameter (D): D = 1.5 in
5. pipe roughness (kr): kr = 0.01 mm
6. density (ρ): ρ = 1000 kg/m3
7. kinematic viscosity (ν): ν = 1.789 mm2/s
8. dynamic viscosity (μ): μ = 0.0017890001 Pas
9. local resistance coefficient (K ): K = 1
10. velocity (V): V = 14.323738 m/s
11. cross section area (A): A = 1140.0918 mm2
12. friction coefficient (f): f = 0.0134630585
13. Reynolds number (Re): Re = 305049.97
14. boundary layer (δ): δ = 0.037963644 mm
15. pressure on the pipe start (p1): p1 = 109.7 psi
16. pressure on the pipe end (p2): p2 = 1.013565 bar
17. pressure drop (p1-p2): p1-p2 = 95 psi
Pipe flow calculations - since 2000
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