Pipe Flow Calculations Forum

Hi,

I have 4 area drops that are feeding a mill that I am installing. I need to determine the size of the pipe diameter that is feeding these 4 pipes.

The pressure is 45 psi

The liquid is water that is being fed by a constant flow by a pump.

I am probably going to use PVC or Steel.

Do I have enough info to determine the proper ID/OD of this main pipe that will split off into the 4 sections.

I calculated aprox 1.4" ID. so I was going to go with 2" to be safe.
Thanks!
john


1
Switch Cabinet pay-off
66 Gallons/Hour
1/2”

2
Oil Cooling System
265 Gallons/Hour
1”

3
Switch Cabinet RS
265 Gallons/Hour
3/4”

4
Main Switch Cabinet
265 Gallons/Hour
3/4”

If I understand you correctly, you have total of 861 gph.
If you assume 1m/s which is OK for water flow, than you are right that 1.4 inch ID is good, but it should be checked with pressure drop also.
What is height difference between pipe inlet where you have 45 psi and pipe outlet to atmosphere?
What is the length of pipe?

Here is the report that I have with pipe diameter calculator:

Pipe diameter calculator

1. volumetric flow rate (q):
q : 861 gph US

2. mass flow rate (w):
w : 3259.227 kg/h

3. diameter (D):
D : 1.3366804 in

4. velocity (v):
v : 1 m/s

5. cross section area (A):
A : 905.34155 mm2

6. density (ρ):
ρ : 1000 kg/m3