Friction Loss Viscous Liquids

Friction loss in schedule 40 steel pipe with viscous liquids with viscosity from water to 1500 SSU

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The table below can be used to indicate the friction loss - feet of liquid per 100 feet of pipe - in standard schedule 40 steel pipes.

Pipe Size
(inches)		 Flow Rate Kinematic Viscosity - SSU
(gpm) (l/s) 31
(Water)		 100
(~Cream)		 200
(~Vegetable oil)		 400
(~SAE 10 oil)		 800
(~Tomato juice)		 1500
(~SAE 30 oil)
1/2 3 0.19 10.0 25.7 54.4 108.0 218.0 411.0
3/4 3 0.19 2.5 8.5 17.5 35.5 71.0 131.0
5 0.32 6.3 14.1 29.3 59.0 117.0 219.0
1 3 0.19 0.8 3.2 6.6 13.4 26.6 50.0
5 0.32 1.9 5.3 11.0 22.4 44.0 83.0
10 0.63 6.9 11.2 22.4 45.0 89.0 165.0
15 0.95 14.6 26.0 34.0 67.0 137.0  
20 1.26 25.1 46 46.0 90.0 180.0  
1 1/4 5 0.32 0.5 1.8 3.7 7.6 14.8 26.0
10 0.63 1.8 3.6 7.5 14.9 30.0 55.0
15 0.95 3.7 6.4 11.3 22.4 45.0 84.0
1 1/2 10 0.63 0.8 1.9 4.2 8.1 16.5 31.0
15 0.95 1.7 2.8 6.2 12.4 25.0 46.0
20 1.26 2.9 5.3 8.1 16.2 33.0 61.0
30 1.9 6.3 11.6 12.2 24.3 50.0 91.0
40 2.5 10.8 19.6 20.8 32.0 65.0 121.0
2 20 1.26 0.9 1.5 3.0 6.0 11.9 22.4
30 1.9 1.8 3.2 4.4 9.0 17.8 33.0
40 2.5 3.1 5.8 5.8 11.8 24.0 44.0
60 3.8 6.6 11.6 13.4 17.8 36.0 67.0
2 1/2 30 1.9 0.8 1.4 2.2 4.4 8.8 16.6
40 2.5 1.3 2.5 3.0 5.8 11.8 22.2
60 3.8 2.7 5.1 5.5 8.8 17.8 34.0
80 5.0 4.7 8.3 9.7 11.8 24.0 44.0
100 6.3 7.1 12.2 14.1 14.8 29.0 55.0
3 60 3.8 0.9 1.8 1.8 3.7 7.3 13.8
100 6.3 2.4 4.4 5.1 6.2 12.1 23.0
125 7.9 3.6 6.5 7.8 8.1 15.3 29.0
150 9.5 5.1 9.2 10.4 11.5 18.4 35.0
175 11.0 6.9 11.7 13.8 15.8 21.4 40.0
200 12.6 8.9 15.0 17.8 20.3 25.0 46.0
4 80 5.0 0.4 0.8 0.8 1.7 3.3 6.2
100 6.3 0.6 1.2 1.3 2.1 4.1 7.8
125 7.9 0.9 1.8 2.1 2.6 5.2 9.8
150 9.5 1.3 2.4 2.9 3.1 6.2 11.5
175 11.0 1.8 3.2 4.0 4.0 7.4 13.7
200 12.6 2.3 4.2 5.1 5.1 8.3 15.5
250 15.8 3.5 6.0 7.4 8.0 10.2 19.4
6 125 7.9 0.1 0.3 0.3 0.52 1.0 1.9
150 9.5 0.2 0.3 0.4 0.6 1.2 2.3
175 11.0 0.2 0.4 0.5 0.7 1.4 2.6
200 12.6 0.3 0.6 0.7 0.8 1.6 3.0
250 15.8 0.5 0.8 1.0 1.0 2.1 3.7
300 18.9 1.1 8.5 10.0 11.6 12.4 23.0
400 25.2 1.1 1.9 2.3 2.8 3.2 6.0
8 250 15.8 0.1 0.2 0.3 0.4 0.7 1.2
300 18.9 0.3 1.2 1.4 1.5 2.5 4.6
400 25.2 0.3 0.5 0.6 0.7 1.1 2.0
10 300 18.9 0.1 0.3 0.4 0.4 0.8 1.5
400 25.2 0.1 0.2 0.2 0.2 0.4 0.8
  •  Centistokes (cSt) = SSU / 4.55

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