Environmental Engineering Reference
In-Depth Information
of measure. These chemical feed rates match the fill rate of
the pipeline to result in the 25 mg/L dosage required.
Study the examples below to gain a more complete under-
standing of how to make this calculation.
Table 3-9a
Liquid chlorine required for 25 mg/L dosage
Liquid Chlorine
for 100 ft (30.48 m)
Liquid Chlorine
for 500 ft (152.4 m)
Pipe Diameter
mm
*
in
.
lb
g
lb
g
2
11,
50
0.00
111,
1.54
0.02
111,
7.71
4
1,
100
0.01
111,
6.17
0.07
11,
30.85
6
1,
150
0.03
11,
13.88
0.15
11,
69.42
8
1,
200
0.05
11,
24.68
0.27
1,
123.42
10
1,
250
0.08
11,
38.57
0.42
1,
192.84
12
1,
300
0.12
11,
55.54
0.61
1,
277.69
16
1,
350
0.22
11,
98.74
1.09
1,
493.68
18
1,
400
0.28
1,
124.96
1.38
1,
624.81
20
1,
450
0.34
1,
154.27
1.70
1,
771.37
24
1,
600
0.49
1,
222.16
2.45
1,110.78
30
1,
750
0.76
1,
347.12
3.82
1,735.59
36
1,
900
1.10
1,
499.85
5.50
2,499.24
42
1,100
1.50
1,
680.35
7.49
3,401.75
48
1,200
1.96
1,
888.62
9.79
4,443.10
54
1,400
2.48
1,124.66
12.39
5,623.30
60
1,500
3.06
1,388.47
15.29
6,942.34
64
1,600
3.48
1,579.77
17.40
7,898.84
* The metric equivalents in mm are nominal values, not exact conversions. The chlorine
amounts are based on the US pipe diameter figures.
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