Pressure drop
for various flow rates in various copper pipe sizes
back Note that the flow rate is gallons per hour, not feet per second.
|
Flow (galls/hr)
|
head loss (inch water gauge per foot run)
|
||
|
15mm tube
|
22mm tube
|
28mm tube
|
|
|
5
|
0.01
|
||
|
10
|
0.02
|
||
|
15
|
0.03
|
||
|
20
|
0.05
|
||
|
25
|
0.07
|
||
|
30
|
0.10
|
0.01
|
|
|
35
|
0.13
|
0.02
|
|
|
40
|
0.16
|
0.02
|
|
|
45
|
0.20
|
0.03
|
|
|
50
|
0.24
|
0.03
|
|
|
55
|
0.28
|
0.04
|
|
|
60
|
0.33
|
0.05
|
0.01
|
|
65
|
0.38
|
0.06
|
0.02
|
|
70
|
0.43
|
0.07
|
0.02
|
|
75
|
0.49
|
0.08
|
0.02
|
|
80
|
0.55
|
0.08
|
0.02
|
|
85
|
0.61
|
0.09
|
0.03
|
|
90
|
0.68
|
0.10
|
0.03
|
|
95
|
0.75
|
0.11
|
0.03
|
|
100
|
0.82
|
0.12
|
0.04
|
|
110
|
0.15
|
0.04
|
|
|
120
|
0.17
|
0.05
|
|
|
130
|
0.19
|
0.05
|
|
|
140
|
0.22
|
0.06
|
|
|
150
|
0.25
|
0.07
|
|
|
160
|
0.28
|
0.08
|
|
|
170
|
0.31
|
0.09
|
|
|
180
|
0.34
|
0.10
|
|
|
190
|
0.38
|
0.11
|
|
|
200
|
0.41
|
0.12
|
|
|
210
|
0.45
|
0.13
|
|
|
220
|
0.49
|
0.14
|
|
|
230
|
0.54
|
0.15
|
|
|
240
|
0.16
|
||
|
250
|
0.17
|
||
|
260
|
0.19
|
||
|
270
|
0.20
|
||
|
280
|
0.21
|
||
|
290
|
0.23
|
||
|
300
|
0.24
|
||
|
310
|
0.26
|
||
|
320
|
0.28
|
||
|
330
|
0.30
|
||
|
340
|
0.31
|
||
|
350
|
0.33
|
||
|
360
|
0.35
|
||
|
370
|
0.36
|
||
|
380
|
0.38
|
||
|
390
|
0.41
|
||
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