Velocity and Flow Capacity of Oil Schedule 40 Pipe

Fluid Flow Table of Contents
Hydraulic and Pneumatic Knowledge

Velocity and Flow Capacity of Oil Schedule 40 Pipe

V =(GPM x .3208) /A

GPM = (V x A)/0.3208

V = Oil velocity in feet per second
GPM = flow in gallons per minute (GPM)
A = Inside area of pipe in square inches (in2).

Schedule 40 Pipe Flow Capacity
Units - > GPM (Gallons per Minute)
Pipe NPT
Nom. Size
2
Ft/Sec
4
Ft/Sec
10
Ft/Sec
15
Ft/Sec
20
Ft/Sec
30
Ft/Sec
1/8
0.35
0.71
1.77
2.66
3.54
5.31
1/4
0.65
1.30
3.24
4.87
6.49
9.73
3/8
1.19
2.38
5.95
8.93
11.9
17.85
1/2
1.89
3.79
9.47
14.21
18.94
28.41
3/4
3.32
6.65
16.62
24.93
33.25
49.87
1
5.39
10.78
26.94
40.41
53.88
80.82
1-1/4
9.32
18.65
46.62
69.93
93.25
139.87
1-1/2
12.69
25.38
63.46
95.19
126.92
190.38
2
20.92
41.84
104.60
156.90
209.20
313.79
2-1/2
29.85
59.70
149.24
223.86
298.48
447.72
3
46.09
92.18
230.44
345.66
460.88
691.31

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