General Information
Flow Data
(
continued)
Water Flow Pressure Loss (psi per 100 feet of hose)
Flow of
water in
U.S. gal.
per min.
Flow of
water in
cu. feet
per sec.
Actual Internal Diameter (in.)
1/2
5/8
3/4
1
11/4 11/2 2
21/2 3
0.5
.001
0.4
1.5
.003
3.02 1.01
0.42
2.5
.005
7.75
2.58 1.08
5
.011
27.8
9.27 3.86 0.95 0.32 0.13
10
.022
99.5 33.2 13.8
3.38 1.14
0.47
0.12
15
.033
71.0
29.6 7.25
2.45 1.01
0.25 0.08
20
.044
121.0 50.3 12.4
4.15
1.71
0.42
0.14
25
.055
76.5 18.7
6.34 2.60 0.64 0.22
30
.066
108.0 26.5 8.96 3.68 0.90 0.30 0.13
35
.077
142.0 34.8 11.8
4.83 1.18
0.40 0.17
40
.088
44.7 15.1
6.20 1.52
0.51
0.21
45
.099
55.0 18.6 7.65
1.87
0.63 0.26
50
.110
67.5
22.8 9.35 2.28 0.78
0.32
60
.132
94.3 31.8
13.1
3.19
1.08 0.45
70
.154
126.0 42.5 17.5
4.25 1.44
0.60
80
.176
54.6 22.5 5.48 1.86 0.77
90
.198
67.5
27.8
6.80 2.30 0.95
100
.223
81.5
33.5 8.19
2.78
1.15
125
.278
124.0 50.6 12.4
4.20 1.73
150
.334
72.1
17.6
6.97 2.46
175
.390
94.5 23.1
7.83
3.23
200
.446
122.0 29.6 10.1
4.15
225
.501
36.8 12.5
5.15
250
.557
44.6 15.2
6.28
275
.613
53.3 18.1
7.45
300
.688
62.5 21.2
8.75
325
.724
72.5 24.6
10.2
350
.780
83.2 28.2 11.7
375
.836
94.5 32.1
13.3
400
.891
107.0 36.2 14.9
450
1.00
44.9 18.6
500
1.11
54.5 22.5
600
1.34
76.5 31.6
700
1.56
102.0 42.1
800
1.78
131.0 53.9
900
2.00
66.8
1000 2.23
81.4
1100
2.45
97.0
1200 2.67
114.0
1300 2.90
132.0
1400 3.12
1500 3.34
1600 3.56
1800 4.01
2000 4.45
Note: The pressure loss experienced by a liquid flowing through a hose depends on the rate of flow, the viscosity of
the liquid, the hose ID, the smoothness of the tube and the hose length. This chart shows the relationship between
rate of flow, ID, and pressure loss for water at 68°F (20°C) with a viscosity of one centipoise. The pressure is directly
proportional to the length of the hose, therefore, the data shown can be easily extended by use of proportions, e.g.,
the pressure drop for 50 feet of hose length is half that for 100 feet.
341
Appendix
C
Air & Multipurpose
General Purpose
Heavy Duty
Push-on
Chemical Transfer
Cleaning Equipment
Food
Transfer
Washdown
Marine
Material Handling
Abrasives
Bulk Transfer
Cement & Concrete
Mining
Petroleum
Aircraft Fueling
Dispensing
Dock
Transfer
Spray
Steam
Vacuum
LPG Delivery
Water
Discharge
Suction & Discharge
Washdown
Welding
Coupling Systems
Equipment
Appendix