HEAD LOSSES IN ORDINARY WATER PIPES :
Figures indicate head in metres per 100 meters of straight pipes
|
| Quantity of Water |
Head Losses in Ordinary Water Pipes
|
| m³/h |
Liters/min |
Liters/sec |
Nominal Pipe Diameter in Inches and Internal Diameter in (mm.) |
½"
15.75 |
¾"
21.25 |
1.00
27.00 |
1¼"
35.75 |
1½"
41.25 |
2"
52.50 |
2½"
68.00 |
3"
80.25 |
3½"
92.50 |
4"
105.0 |
5"
130.0 |
6"
155.5 |
| 0.6 |
10 |
0.16 |
9.91 |
2.41 |
|
|
|
|
|
|
|
|
|
|
|
| 0.9 |
15 |
0.25 |
20.11 |
4.86 |
1.57 |
0.42 |
|
|
|
|
|
|
|
|
| 1.2 |
20 |
0.33 |
33.53 |
8.04 |
2.59 |
0.68 |
0.35 |
|
|
|
|
|
|
|
| 1.5 |
25 |
0.42 |
49.93 |
11.91 |
3.83 |
1.00 |
0.51 |
|
|
|
|
|
|
|
| 1.8 |
30 |
0.50 |
69.34 |
16.50 |
5.28 |
1.38 |
0.70 |
0.22 |
|
|
|
|
|
|
| 2.1 |
35 |
0.58 |
91.54 |
21.75 |
6.95 |
1.81 |
0.91 |
0.29 |
|
|
|
|
|
|
| 2.4 |
40 |
0.67 |
|
27.66 |
8.82 |
2.29 |
1.16 |
0.37 |
|
|
|
|
|
|
| 3.0 |
50 |
0.83 |
|
41.40 |
13.14 |
3.40 |
1.72 |
0.54 |
0.16 |
|
|
|
|
|
| 3.6 |
60 |
1.00 |
|
57.74 |
18.28 |
4.72 |
2.38 |
0.75 |
0.22 |
|
|
|
|
|
| 4.2 |
70 |
1.12 |
|
76.49 |
24.18 |
6.23 |
3.13 |
0.99 |
0.29 |
0.13 |
|
|
|
|
| 4.8 |
80 |
1.33 |
|
|
30.87 |
7.94 |
3.99 |
1.25 |
0.36 |
6.16 |
|
|
|
|
| 5.4 |
90 |
1.50 |
|
|
38.30 |
9.83 |
4.93 |
1.55 |
0.45 |
0.20 |
|
|
|
|
| 6.0 |
100 |
1.67 |
|
|
46.49 |
11.90 |
5.97 |
1.88 |
0.54 |
0.24 |
0.12 |
|
|
|
| 7.5 |
125 |
2.08 |
|
|
70.41 |
17.93 |
8.97 |
2.80 |
0.81 |
0.37 |
0.19 |
0.10 |
|
|
| 9.0 |
150 |
2.50 |
|
|
|
25.11 |
12.53 |
3.90 |
1.12 |
0.51 |
0.26 |
0.14 |
|
|
| 10.5 |
175 |
2.92 |
|
|
|
33.32 |
16.66 |
5.18 |
1.49 |
0.67 |
0.34 |
0.18 |
|
|
| 12 |
200 |
3.33 |
|
|
|
42.75 |
21.36 |
6.62 |
1.90 |
0.86 |
0.43 |
0.23 |
0.08 |
|
| 15 |
250 |
4.17 |
|
|
|
64.86 |
32.32 |
10.03 |
2.86 |
1.28 |
0.65 |
0.35 |
0.13 |
|
| 18 |
300 |
5.00 |
|
|
|
|
45.52 |
14.04 |
4.01 |
1.79 |
0.90 |
0.49 |
0.18 |
0.07 |
| 24 |
400 |
6.67 |
|
|
|
|
78.17 |
24.04 |
6.83 |
3.05 |
1.53 |
0.83 |
0.29 |
0.12 |
| 30 |
500 |
8.33 |
|
|
|
|
|
36.71 |
10.40 |
4.62 |
2.32 |
1.25 |
0.45 |
0.19 |
| 36 |
600 |
10.0 |
|
|
|
|
|
51.84 |
14.62 |
6.51 |
3.26 |
1.76 |
0.62 |
0.26 |
| 42 |
700 |
11.7 |
|
|
|
|
|
|
19.52 |
8.69 |
4.36 |
2.35 |
0.83 |
0.35 |
| 48 |
800 |
13.3 |
|
|
|
|
|
|
25.20 |
11.18 |
5.58 |
3.01 |
1.07 |
0.45 |
| 54 |
900 |
15.0 |
|
|
|
|
|
|
31.51 |
13.97 |
6.98 |
3.76 |
1.33 |
0.56 |
| 60 |
1,000 |
16.7 |
|
|
|
|
|
|
38.43 |
17.06 |
8.52 |
4.60 |
1.62 |
0.67 |
| 75 |
1,250 |
20.8 |
|
|
|
|
|
|
|
26.10 |
13.00 |
7.01 |
2.46 |
1.03 |
| 90 |
1,500 |
25.0 |
|
|
|
|
|
|
|
36.97 |
18.42 |
9.89 |
3.46 |
1.44 |
| 105 |
1,750 |
29.2 |
|
|
|
|
|
|
|
|
24.76 |
13.30 |
3.47 |
1.93 |
| 120 |
2,000 |
33.3 |
|
|
|
|
|
|
|
|
31.94 |
17.16 |
4.67 |
2.50 |
| 150 |
2,500 |
41.7 |
|
|
|
|
|
|
|
|
|
26.26 |
6.00 |
3.81 |
| 180 |
3,000 |
50.0 |
|
|
|
|
|
|
|
|
|
|
9.22 |
5.42 |
| 240 |
4,000 |
66.7 |
|
|
|
|
|
|
|
|
|
|
13.05 |
8.93 |
| 300 |
5,000 |
83.3 |
|
|
|
|
|
|
|
|
|
|
22.72 |
14.42 |
| 90°C bends slide valves |
1.00 |
1.00 |
1.10 |
1.20 |
1.30 |
1.40 |
1.50 |
1.60 |
1.60 |
1.60 |
1.70 |
2.50 |
| T-pieces non-return valves |
4.00 |
4.00 |
4.00 |
5.00 |
5.00 |
5.00 |
6.00 |
6.00 |
6.00 |
6.00 |
7.00 |
9.00 |
The Table is calculated in accordance with H.Lang's new
formula a=0.02 and for a water temperature of 10°C
The head loss in bends, slide, valves, T-Pieces and non-return valves is ecuvate it.
|
