THE FLOW OF WATER IN CONCRETE PIPE. 
59 
Table 8.— For Estimating the Capacity of Well-Made Concrete Pipe Lines or 
Pressure Tunnels— Continued. 
For instance, 400 second-feet of water, the equivalent of 259 million U. S. gallons per day, will oe conveyed 
in a 144-inch (12-foot) pipe at a velocity of 3.54 feet per second with a loss of head (grade) of 0.21 feet 
per thousand feet of pipe. 
Quan- 
Inside diameter in inches and corresponding area, A , in square feet. 
Quan- 
tity, 
tity 
102 
108 
114 
120 
12€ 
132 
138 
mil- 
(Q). 
A = 
56.74 
A= 
33.62 
^ = 70.88 
A = 
78.54 
A = 
86.59 
A = 
35.03 
A = 
103.9 
lions 
per 
day. 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
Sec. ft. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Fed. 
Feet. 
Feet. 
Feet. 
Feet. 
Gals. 
160 
2.82 
0.21 
2.51 
0.15 
2.26 
0.11 
2.04 
0.09 
1.85 
0.07 
1.68 
0.05 
1.54 
0.04 
103 
170 
3.00 
.23 
2.67 
.17 
2.40 
.13 
2.17 
.10 
1.96 
.08 
1.79 
.06 
1.64 
.05 
110 
180 
3.17 
.26 
2.83 
.19 
2.54 
.14 
2.29 
.11 
2.08 
.09 
1.89 
.07 
1.73 
.05 
116 
190 
3.35 
.29 
2.99 
.22 
2.68 
.16 
2.42 
.12 
2.19 
.10 
2.00 
.08 
1.83 
.06 
123 
200 
3.53 
.32 
3.14 
.24 
2.82 
.18 
2.55 
.14 
2.31 
.11 
2.10 
.08 
1.92 
.07 
129 
220 
3.88 
.39 
3.46 
.29 
3.10 
.22 
2.80 
.17 
2.54 
.13 
2.32 
.10 
2.12 
.OS 
142 
240 
4.23 
.46 
3.77 
.34 
3.39 
.26 
3.06 
.20 
2.77 
.15 
2.52 
.12 
2.31 
.09 
155 
260 
4.58 
.54 
4.09 
.40 
3.67 
.30 
3.31 
.23 
3.00 
.18 
2.74 
.14 
2.50 
.11 
168 
280 
4.94 
.63 
4.40 
.47 
3.95 
.35 
3.56 
.27 
3.23 
.21 
2.95 
.16 
2.70 
.13 
181 
300 
5.29 
.72 
4.72 
.54 
4.23 
.40 
3.82 
.31 
3.46 
.24 
3.16 
.19 
2.89 
.15 
194 
320 
5.64 
.82 
5.03 
.61 
4.52 
.46 
4.07 
.35 
3.69 
.27 
3.37 
.21 
3.08 
.17 
207 
340 
5.99 
.93 
5.34 
.69 
4.80 
.52 
4.33 
.40 
3.93 
.31 
3.58 
.24 
3.27 
.19 
220 
360 
6.35 
1.04 
5.66 
.77 
5.08 
.58 
4.58 
.45 
4.16 
.34 
3.79 
.27 
3.46 
.21 
233 
380 
fci.70 
1.16 
5.97 
.86 
5.36 
.65 
4.84 
.50 
4.39 
.38 
4.00 
.30 
3.66 
.24 
246 
400 
7.05 
1.29 
6.29 
.95 
5.64 
.72 
5.09 
.55 
4.62 
.42 
4.21 
.33 
3.85 
.26 
253 
420 
7.40 
1.42 
6.60 
1.05 
5.92 
79 
5.35 
.60 
4.85 
.47 
4.42 
.37 
4.04 
.29 
271 
440 
7.75 
1.56 
6.92 
1.16 
6.21 
.87 
5.60 
.66 
5.08 
.51 
4.63 
.40 
4.24 
.32 
284 
460 
8.11 
1.70 
7.23 
1.26 
6.49 
.95 
5.86 
.73 
5.31 
.56 
4.84 
.44 
4.43 
.35 
297 
480 
8.46 
1.86 
7.54 
1.37 
6.77 
1.03 
6.11 
.79 
5.54 
.61 
5.05 
.48 
4.62 
.38 
310 
500 
8.81 
2.01 
7.86 
1.49 
7.05 
1.12 
6.37 
.86 
5.77 
.66 
5.26 
.52 
4.81 
.41 
323 
550 
9.69 
2.43 
8.64 
1.80 
7.76 
1.36 
7.00 
1.04 
6.35 
.80 
5.79 
.63 
5.29 
.50 
355 
600 
10.60 
2.91 
9.43 
2.15 
8.46 
1.61 
7.64 
1.23 
6.93 
.96 
6.31 
.75 
5.78 
.59 
388 
650 
11.50 
3.36 
10.20 
2.51 
9.16 
1.90 
8.28 
1.45 
7.51 
1.12 
6.84 
.88 
6.26 
.70 
420 
709 
12.30 
3.92 
11.00 
2.92 
9.88 
2.20 
8.91 
1.68 
8.08 
1.30 
7.37 
1.02 
6.74 
.81 
452 
750 
13.20 
4.51 
11.80 
3.36 
10.60 
2.53 
9.55 
1.93 
8.66 
1.49 
7.89 
1.17 
7.22 
.92 
485 
800 
14.10 
5.15 
12.60 
3.83 
11.30 
2.88 
10.20 
2.20 
9.24 
1.70 
8.42 
1.33 
7.70 
1.05 
517 
850 
15.00 
5.83 
13.40 
4.32 
12.00 
3.24 
10.80 
2.47 
9.82 
1.92 
8.94 
1.50 
8.18 
1.19 
549 
900 
15.90 
6.55 
14.20 
4.87 
12.70 
3.63 
11.50 
2.80 
10.40 
2.15 
9.47 
1.68 
8.66 
1.33 
582 
950 
16.80 
7.23 
14.90 
5.35 
13.40 
4.04 
12.10 
3.10 
11.00 
2.41 
10.00 
1.88 
9.14 
1.48 
614 
1,000 
17.60 
8.02 
15.70 
5.95 
14.10 
4.48 
12.70 
3.41 
11.50 
3.63 
10.50 
2.07 
9.69 
1.64 
646 
1' 
14 
I. 
36 
168 
1 
iO 
1< 
32 
2< 
34 
2 
16 
200 
A= 
113.1 
A= 
L32.7 
^1 = 153.94 
A = \ 
76.71 
A = 
201.1 
A = 
227.0 
A = 
254.5 
129 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
V 
H 
1.77 
0.05 
1.51 
0.02 
1.30 
0.02 
1.13 
0.02 
0.99 
0.01 
0.88 
0.01 
0.79 
0.01 
250 
2.21 
.08 
1.88 
.05 
1.62 
.04 
1.41 
.03 
1.24 
.02 
1.10 
.01 
.98 
.01 
162 
300 
2.65 
.12 
2.26 
.08 
1.95 
.05 
1.70 
.04 
1.49 
.03 
1.32 
.02 
1.18 
.01 
194 
350 
3.09 
.16 
2.64 
.11 
2.27 
.07 
1.98 
.05 
1.74 
.04 
1.54 
.03 
1.38 
.02 
226 
400 
3.54 
.21 
3.01 
.14 
2.60 
.09 
2.26 
.06 
1.99 
.05 
1.76 
.03 
1.57 
.02 
259 
450 
3.98 
.27 
3.39 
.17 
2.92 
.12 
2.55 
.08 
2.24 
.06 
1.98 
.04 
1.77 
.03 
291 
500 
4.42 
.33 
3.77 
.21 
3.25 
.15 
2.83 
.10 
2.49 
.07 
2.20 
.05 
1.97 
.04 
323 
550 
4.85 
.40 
4.15 
.26 
3.57 
.18 
3.11 
.12 
2.74 
.09 
2.42 
.07 
2.16 
.05 
355 
600 
5.31 
.47 
4.52 
.31 
3.90 
.21 
3.40 
.15 
2.98 
.10 
2.64 
.08 
2.36 
.06 
388 
650 
5.75 
.56 
4.90 
.37 
4.22 
.25 
3.68 
.17 
3.23 
.12 
2.86 
.09 
2.55 
.07 
420 
700 
6.19 
.64 
5.28 
.42 
4.55 
.29 
3.96 
.20 
3.48 
.14 
3.08 
.10 
2.75 
.08 
452 
750 
6.63 
.74 
5.65 
.48 
4.87 
.33 
4.24 
.23 
3.73 
.16 
3.30 
.12 
2.95 
.09 
485 
800 
7.07 
.84 
6.03 
.55 
5.20 
.38 
4.53 
.26 
3.98 
.19 
3.52 
.14 
3.14 
.10 
517 
850 
7.52 
.95 
6.41 
.63 
5.52 
.42 
4.81 
.29 
4.23 
.21 
3.74 
.15 
3.34 
.11 
549 
900 
7.96 
1.07 
6.78 
.70 
5.85 
.48 
5.09 
.33 
4.48 
.24 
3.96 
.17 
3.54 
.12 
582 
950 
8.40 
1.19 
7.16 
.78 
6.17 
.53 
5.38 
.37 
4.72 
.26 
4.18 
.19 
3.73 
.14 
614 
1,000 
8.84 
1.32 
7.54 
.87 
6.50 
.59 
5.66 
.41 
4.97 
.29 
4.41 
.21 
3.93 
.16 
646 
1,050 
9.28 
1.45 
7.91 
.95 
6.82 
.65 
5.94 
.45 
5.23 
.32 
4.63 
.23 
4.12 
.17 
678 
1,100 
9.73 
1.59 
8.29 
1.05 
7.15 
.71 
6.22 
.49 
5.47 
.35 
4.85 
.26 
4.32 
.19 
711 
1,150 
10.20 
1.75 
8.67 
1.14 
7.47 
.78 
6.51 
.56 
5.72 
.38 
5.07 
.28 
4.52 
.21 
743 
1,200 
10.60 
1.89 
9.04 
1.24 
7.80 
.85 
6.79 
.59 
5.97 
.42 
5.29 
.30 
4.71 
.23 
776 
1,250 
11.10 
2.07 
9.42 
1.35 
8.12 
.92 
7.07 
.64 
6.22 
.45 
5.51 
.33 
4.92 
.24 
807 
1,300 
11.50 
2.23 
9.80 
1.46 
8.45 
.99 
7.36 
.69 
6.47 
.49 
5.73 
.36 
5.11 
.26 
840 
1,400 
12.40 
2.59 
10.60 
1.71 
9.09 
1.15 
7.92 
.80 
6.96 
.57 
6.17 
.41 
5.50 
.31 
905 
1,500 
13.30 
2.98 
11.30 
1.94 
9.74 
1.32 
8.49 
.92 
7.46 
.65 
6.61 
.48 
5.90 
.35 
969 
1,600 
14.20 
3.39 
12.10 
2.23 
10.40 
1.50 
9.05 
1.04 
7.96 
.74 
7.05 
.54 
6.29 
.40 
1,403 
1,700 
15.00 
3.79 
12.80 
2.50 
11.00 
1.68 
9.62 
1.18 
8.46 
.84 
7.49 
.61 
6.68 
.45 
1,098 
1,800 
15.90 
4.26 
13.60 
2.82 
11.70 
1.90 
10.20 
1.32 
8.95 
.94 
7.93 
.68 
7.07 
.51 
1,163 
1,900 
16.80 
4.75 
14.30 
3.15 
12.30 
2.12 
10.80 
1.48 
9.48 
1.05 
8.37 
.76 
7.47 
.56 
1,228 
2,000 
17.70 
5.27 
15.10 
3.48 
13.00 
2.35 
11.30 
1.62 
9.95 
1.16 
8.81 
.85 
7.86 
.63 
1,922 
