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Pipe Flow - Liters Per Second

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Gallons per Minute Litres per Second

Velocity Limit Velocity Limit


D (inch) A (ft2) 5 fps 7 fps D (mm) A (m2) 1.5 m/s 2 m/s
0.5 0.00136 3.1 4.3 10 0.00008 0.1 0.2
0.75 0.00307 6.9 9.6 20 0.00031 0.5 0.6
1 0.00545 12.2 17.1 25 0.00049 0.7 1.0
1.25 0.00852 19.1 26.8 30 0.00071 1.1 1.4
1.5 0.01227 27.5 38.6 40 0.00126 1.9 2.5
2 0.02182 49.0 68.5 50 0.00196 2.9 3.9
3 0.04909 110 154 75 0.00442 6.6 8.8
4 0.08727 196 274 100 0.00785 11.8 15.7
5 0.13635 306 428 120 0.01131 17.0 22.6
6 0.19635 441 617 150 0.01767 26.5 35.3
8 0.34907 783 1,097 200 0.03142 47.1 62.8
10 0.54542 1,224 1,714 250 0.04909 73.6 98.2
12 0.78540 1,763 2,468 300 0.07069 106 141
15 1.22718 2,754 3,856 400 0.12566 188 251
18 1.76715 3,966 5,552 500 0.19635 295 393
20 2.18166 4,896 6,855 600 0.28274 424 565
25 3.40885 7,650 10,711 700 0.38485 577 770
30 4.90874 11,017 15,423 800 0.50265 754 1,005
40 8.72665 19,585 27,419 900 0.63617 954 1,272
50 13.63538 30,602 42,843 1000 0.78540 1,178 1,571
1100 0.95033 1,425 1,901
Cubic Feet per Second 1200 1.13097 1,696 2,262
Velocity Limit 1300 1.32732 1,991 2,655
D (ft) A (ft2) 5 fps 7 fps 1400 1.53938 2,309 3,079
1 0.785 3.93 5.50 1500 1.76715 2,651 3,534
2 3.142 15.71 21.99 1600 2.01062 3,016 4,021
3 7.069 35.34 49.48 1700 2.26980 3,405 4,540
4 12.566 62.83 87.96 1800 2.54469 3,817 5,089
5 19.635 98.17 137.44 1900 2.83529 4,253 5,671
6 28.274 141.37 197.92 2000 3.14159 4,712 6,283
7 38.485 192.42 269.39 2100 3.46361 5,195 6,927
8 50.265 251.33 351.86 2200 3.80133 5,702 7,603
9 63.617 318.09 445.32 2300 4.15476 6,232 8,310
10 78.540 392.70 549.78 2400 4.52389 6,786 9,048
11 95.033 475.17 665.23 2500 4.90874 7,363 9,817
12 113.097 565.49 791.68 2600 5.30929 7,964 10,619
13 132.732 663.66 929.13 2700 5.72555 8,588 11,451
14 153.938 769.69 1,077.57 2800 6.15752 9,236 12,315
15 176.715 883.57 1,237.00 2900 6.60520 9,908 13,210
16 201.062 1,005.31 1,407.43 3000 7.06858 10,603 14,137
17 226.980 1,134.90 1,588.86 3100 7.54768 11,322 15,095
18 254.469 1,272.35 1,781.28 3200 8.04248 12,064 16,085
19 283.529 1,417.64 1,984.70 3300 8.55299 12,829 17,106
20 314.159 1,570.80 2,199.11 3400 9.07920 13,619 18,158

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