FLUID FLOW IN PIPING
Flow of Water thru Schedule 40 Steel Pipe
Pressure Drop per 1,000 Feet of Schedule 40 Steel Pipe
Flow Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Velocity Pressure Rate Drop Drop Drop Drop Drop Drop Drop Drop Drop (GPM) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI) (ft/s) (PSI)
1”
1 1 / 4 ”
1 2 3 4 5 6 8
0.37 0.74 1.12 1.49 1.86
0.49 1.70 3.53 5.94 9.02
1 1 / 2 ”
0.43 0.64 0.86 1.07 1.28 1.72 2.14 3.21 4.29 5.36 6.43 7.51
0.45 0.94 1.55 2.36 3.30 5.52 8.34 17.6 29.1 43.7 62.9 82.5
0.47 0.63 0.79 0.95 1.26 1.57 2.36 3.15 3.94 4.72 5.51 6.30 7.08 7.87
0.44 0.74 1.12 1.53 2.63 3.86 8.13 13.5 20.2 29.1 38.2 47.8 60.6 74.7
2”
2.24 12.25
0.57 0.76 0.96 1.43 1.91 2.39 2.87
0.46 0.75 1.14 2.33 3.86 5.81 8.04
2 1 / 2 ”
2.98 3.72 5.60
21.1 30.8 64.6
10 15 20 25 30 35 40 45 50 60 70 80 90
0.67 1.00 1.34 1.68 2.01 2.35 2.68 3.00 3.35 4.02 4.69 5.37 6.04 6.71 8.38
0.48 0.99 1.64 2.48 3.43 4.49 5.88 7.14 8.82 12.2 15.3 21.7 26.1 32.3 48.2 60.4 90.0
3”
3 1 / 2 ”
7.44 110.5
0.87 1.08 1.30 1.52 1.74 1.95 2.17 2.60 3.04 3.48 3.91 4.34 5.42 6.51 7.59 8.68 9.77
0.59 0.67 1.21 1.58 2.06 2.51 3.10 4.29 5.84 7.62 9.22 11.4 17.1 23.5 32.0 39.7 50.2 61.9 75.0 84.7
0.81 0.97 1.14 1.30 1.46 1.62 1.95 2.27 2.59 2.92 3.24 4.05 4.86 5.67 6.48 7.29 8.10 8.91 9.72
0.42 0.60 0.79 1.00 1.21 1.44 2.07 2.71 3.53 4.46 5.27 7.86 11.3 14.7 19.2 23.1 28.5 34.4 40.9 45.5 52.7 60.7 68.9 77.8 87.3
4”
3.35 10.95
0.88 1.01 1.13 1.26 1.51 1.76 2.01 2.26 2.52 3.15 3.78 4.41 5.04 5.67 6.30 6.93 7.56 8.18 8.82 9.45
0.42 0.53 0.67 0.80 1.10 1.50 1.87 2.37 2.81 4.38 6.02 8.20 10.2 12.9 15.9 18.3 21.8 25.5 29.7 32.3 36.7 41.5 46.5 51.7 57.3 69.3 82.5
3.82 4.30 4.78 5.74 6.69 7.65 8.60 9.56
13.7 17.4 20.6 29.6 38.6 50.3 63.6 75.1
5”
1.12 1.28 1.44 1.60 2.00 2.41 2.81 3.21 3.61 4.01 4.41 4.81 5.21 5.61 6.01 6.41 6.82 7.22 7.62 8.02 8.82 9.62
0.48 0.63 0.80 0.95 1.48 2.04 2.78 3.46 4.37 5.14 6.22 7.41 8.25 9.57 11.0 12.5 14.1 15.0 16.7 18.5 22.4 26.7 31.3 36.3 41.6 44.7 50.5 56.6 63.1 70.0 84.6
6”
100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 550 600 650 700 750 800 850 900 950
1.11 1.39 1.67 1.94 2.22 2.50 2.78 3.06 3.33 3.61 3.89 4.16 4.44 4.72 5.00 5.27 5.55 6.11 6.66 7.21 7.77 8.32 8.88 9.44
0.39 0.56 0.78 1.06 1.32 1.66 2.05 2.36 2.80 3.29 3.62 4.16 4.72 5.34 5.96 6.66 7.39 8.94 10.6 11.8 13.7 15.7 17.8 20.2 22.6 23.7 26.3 31.8 37.8 44.4 51.5 55.5 63.1 79.8 98.5
10.06 11.73
8”
1.44 1.60 1.76 1.92 2.08 2.24 2.40 2.56 2.72 2.88 3.04 3.20 3.53 3.85 4.17 4.49 4.81 5.13 5.45 5.77 6.09 6.41 7.05 7.69 8.33 8.97 9.62
0.44 0.55 0.63 0.75 0.88 0.97 1.11 1.27 1.43 1.60 1.69 1.87 2.26 2.70 3.16 3.69 4.21 4.79 5.11 5.73 6.38 7.08 8.56 10.2 11.3 13.0 15.0 17.0 21.6 25.0 39.0 52.4 71.4 93.3
10.85 11.94 13.02
10.53 11.35 12.17 12.97 13.78 14.59
10.08 10.70 11.33 11.96 12.59 13.84 15.10
10”
1.93 2.04 2.24 2.44 2.65 2.85 3.05 3.26 3.46 3.66 3.87 4.07 4.48 4.88 5.29 5.70 6.10 6.51 7.32 8.13
0.30 0.63 0.70 0.86 1.01 1.18 1.35 1.54 1.74 1.94 2.23 2.40 2.74 3.27 3.86 4.44 5.11 5.46 6.91 8.54 12.5 18.0 22.9 29.9 37.8 46.7 67.2 85.1
12”
10.42 11.22 12.02 12.82 13.62 14.42 15.22 16.02 17.63
2.01 2.15 2.29 2.44 2.58 2.72 2.87 3.16 3.45 3.73 4.02 4.30 4.59 5.16 5.73 7.17 8.60
0.48 0.55 0.62 0.70 0.79 0.88 0.98 1.18 1.40 1.56 1.80 2.07 2.36 2.98 3.47 5.41 7.31 9.95 13.0 15.4 18.9 27.3 37.2 45.1 57.0 70.4 93.6
14”
2.02 2.14 2.25 2.38 2.61 2.85 3.09 3.32 3.55 3.80 4.27 4.74 5.92 7.12 8.32 9.49
0.43 0.48 0.53 0.59 0.68 0.81 0.95 1.10 1.19 1.35 1.71 2.11 3.09 4.45 6.18 7.92 9.36 11.6 15.4 21.0 27.4 34.7 42.9 61.8 84.0
10.00 10.55 11.10 12.22 13.32 14.43 15.54 16.65 17.76 19.98 22.20
1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,800 2,000 2,500 3,000 3,500 4,000 4,500 5,000 6,000 7,000 8,000 9,000
16”
2.18 2.36 2.54 2.73 2.91 3.27 3.63 4.54 5.45 6.35 7.25 8.17 9.08
0.40 0.47 0.54 0.62 0.71 0.85 1.05 1.63 2.21 3.00 3.92 4.97 5.72 8.24 12.2 13.6 17.2 21.2 30.9 41.6 54.4
18”
10.26 11.54 12.83 16.03 19.24 22.43 25.65
2.58 2.88 3.59 4.31 5.03 5.74 6.47 7.17 8.62
0.48 0.56 0.88 1.27 1.52 2.12 2.50 3.08 4.45 6.06 7.34 9.20 11.5 16.5 20.7 27.1
20”
10.18 12.21 14.25 16.28 18.31 20.35 24.42 28.50
3.45 4.03 4.61 5.19 5.76 6.92 8.06 9.23
0.73 0.94 1.22 1.55 1.78 2.57 3.50 4.57 5.36 6.63 9.54 12.0 15.7
24”
10.03 11.48 12.90 14.34 17.21 20.08 22.95 25.80 28.63 34.38
3.19 3.59 3.99 4.80 5.68 6.38 7.19 7.96 9.57
0.51 0.60 0.74 1.00 1.36 1.78 2.25 2.78 3.71 5.05 6.60
10.67 11.84 14.32 16.60 18.98 21.35 23.75 28.50 33.20
10.88 12.69 14.52 16.32 18.16 21.80 25.42 29.05
10.04 11.48 12.92 14.37 17.23 20.10 22.96
10.37 11.53 13.83 16.14 18.43
10,000 12,000 14,000 16,000
11.18 12.77
57
Tel: 610-495-5131 • Pottstown PA • USA •• www.watsonmcdaniel.com
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