56 
BULLETIN 852, IT. S. DEPARTMENT OE AGRICULTURE. 
Table 6. — For Estimating the Capacity of Modern Concrete Pipe Llnes Made by Dry-Mixture 
Process. 1 
Based on formula V= C s H°-' 3 d - 6 ^ using 0.310 for the coefficient C s . For instance, 2 second-feet of water, 
the equivalent of SO miner's inches measured under a 6-inch pressure, or of 100 miner's inches measured 
under a 4-inch pressure, or of S9S gallons per minute, will be conveyed by a 1 2-inch pipe, with a velocity 
of 2.55 feet per second with a loss of head (grade) of 3.04 feet for each 1,000 feet of pipe. 
Quantity (Q). 
Inside diameter, in inches and corresponding area, A, in square feet. 
Sec. 
ft. 
0.1 
.2 
.3 
.4 
.5 
.6 
.7 
.8 
.9 
1.0 
1.2 
1.4 
1.6 
1.8 
2.0 
2.2 
2.4 
2.6 
2.8 
3.0 
3.2 
3.4 
3.6 
3.8 
4.0 
4.5 
5.0 
5. 5 
6.0 
6.5 
4.5 
5.0 
5.5 
6.0 
6.5 
7.0 
7. 5 
8.0 
8.5 
9.0 
9.5 
10.0 
11.0 
12.0 
13.0 
14.0 
15.0 
16.0 
17.0 
18.0 
20.0 
22.0 
24.0 
26.0 
28.0 
30.0 
32.0 
Miner's 
inches. 
A(40) B(50) 
12 
16 
20 
24 
28 
32 
36 
40 
48 
56 
64 
72 
80 
88 
96 
104 
112 
120 
128 
136 
14-1 
152 
160 
180 
200 
220 
240 
260 
ISO 
200 
220 
240 
260 
280 
300 
320 
340 
360 
380 
400 
440 
480 
520 
560 
600 
640 
680 
720 
800 
880 
960 
1,040 
1,120 
1,200 
1,280 
100 
110 
120 
130 
140 
150 
160 
170 
180 
190 
200 
225 
250 
275 
300 
325 
225 
250 
275 
300 
325 
350 
375 
400 
425 
450 
475 
500 
550 
600 
650 
700 
750 
800 
850 
900 
1,000 
1,100 
1,200 
1,300 
1,400 
1,500 
1.600 
Gal- 
lons 
per 
min- 
ute. 
6 
.4 = 0.196 
45 
90 
135 
180 
225 
270 
315 
360 
405 
449 
539 
629 
719 
809 
898 
988 
1,089 
1,168 
1,258 
1,348 
1,438 
1,528 
1,618 
1,708 
1,797 
2,022 
2,247 
2,472 
2,697 
2,922 
2,022 
2,247 
2,472 
2,697 
2,922 
3,146 
3,371 
■3,596 
3,821 
4,046 
4,271 
4,496 
4,948 
5,398 
5,847 
6,297 
6,747 
7,197 
7,647 
8,096 
8,996 
9,S96 
10, 795 
11,695 
12,594 
13, 492 
14,390 
Feet. 
0.51 
1.02 
1.53 
2.04 
2. 55 
3.06 
3.56 
4.08 
4.5S 
5.10 
6.11 
7.13 
8.15 
9.17 
10.20 
11.20 
12.20 
Feet. 
0.28 
1.06 
2.60 
4.61 
7.24 
10.40 
14.00 
18.40 
23.40 
28.80 
42.00 
56.00 
74.00 
93.00 
105. 00 
140. 00 
165.00 
8 
.4 = 0.349 
Feet. 
0.29 
.57 
.86 
1.14 
1.43 
1.72 
2.01 
2.29 
2.58 
2.87 
3.44 
4.01 
4.58 
5.16 
5.73 
6.30 
6.87 
7.45 
8.02 
8.59 
9.17 
9.74 
10.30 
10.90 
H 
Feet. 
0.07 
.15 
.57 
1.00 
1.58 
2.30 
3.15 
4.07 
5.16 
6.38 
9.15 
12.50 
16.30 
20. 70 
25.40 
30.80 
36.50 
43.00 
50. 00 
57.30 
65.30 
73.50 
82.50 
92.20 
10 
-4 = 0.545 
Feet. 
1.10 
1.28 
1.47 
1.65 
1.83 
2.20 
2.57 
2.93 
3.30 
3.67 
4.03 
4.40 
4.77 
5.13 
5.50 
5.87 
6.23 
6.60 
6.97 
7.33 
8.25 
9.17 
10.10 
11.00 
11.90 
H 
Feet. 
0.71 
.96 
1.26 
1.60 
1.96 
2.84 
3.88 
5.07 
6.46 
7.95 
9.50 
11.40 
13.30 
15. 50 
17.80 
20.20 
22.80 
25.60 
28.50 
31.50 
39.70 
49.10 
59. 60 
70.70 
S2. 70 
12 
.4=0.785 
Feet. 
0.76 
.89 
1.02 
1.14 
1.27 
1.53 
1.78 
2.04 
2.29 
2.55 
2.80 
3.06 
3.31 
3.56 
3.82 
4.07 
4.33 
4.58 
4.84 
5.09 
5.73 
6.37 
7.00 
7.64 
8.27 
Feet. 
0.27 
.37 
.48 
.61 
. 75 
1.09 
1.48 
1.95 
2.44 
3.04 
3.66 
4.37 
5.11 
5.92 
6.81 
9.82 
10.80 
12.20 
15.30 
18. SO 
22.80 
27.10 
31. SO 
14 
.4 = 1.0 
Feet. 
.84 
.94 
1.12 
1.31 
1.50 
1.68 
1.87 
2.06 
2.24 
2.43 
2.62 
2.81 
2.99 
3.18 
3.37 
3.55 
3.74 
4.21 
4.68 
5.15 
5.61 
6. OS 
Feet. 
0.22 
.27 
.34 
.48 
.66 
.84 
1.09 
1.35 
1.63 
1.93 
2.28 
2.64 
3.04 
3.44 
3.90 
4.37 
4. 86 
5.39 
6.81 
8.41 
10.20 
12.10 
14.20 
16 
,1=1.3 
Feet. 
0.86 
1.00 
1.15 
1.29 
1.43 
1.58 
1.72 
1.86 
2.00 
2.15 
2.29 
2.44 
2.59 
2.72 
2.86 
3.24 
3. 5S 
3.94 
4.30 
4.66 
H 
Feet. 
0.24 
.33 
.43 
.54 
.67 
.82 
.97 
1.13 
1.30 
1.50 
1.71 
1.94 
2.18 
2.41 
2.67 
3.64 
4.53 
5.49 
6. 54 
18 
.4 = 
1.767 
V 
H 
2.55 
1.85 
2.83 
2.25 
3.11 
2.72 
3.40 
3.24 
3.68 
3.80 
3.96 
4.40 
4.24 
5.05 
4.53 
o. i / 
4.81 
6.50 
5.10 
7.30 
5.38 
8.16 
5.66 
8.98 
6.22 
10. SO 
6.79 
12.90 
7.36 
15.20 
7.92 
17.70 
8.49 
20.30 
9.06 
23.00 
9.62 
26.00 
10.20 
29.30 
11.30 
35.90 
12.40 
43.30 
13.60 
51.90 
14.70 
60.80 
15.80 
70.10 
20 
.4 = 2.182 
2.06 
2.29 
2.52 
2.75 
2.98 
3.21 
3.44 
3.64 
3.90 
4.12 
4.35 
4.58 
5.04 
5.50 
5.96 
6.42 
6.87 
7.33 
7.79 
8.25 
9.17 
10.10 
11.00 
11.90 
12.80 
13.70 
14.70 
1.05 
1.29 
1.57 
1.86 
2.18 
2.54 
2.92 
3.32 
3.74 
4.18 
4.66 
5.17 
6.26 
7.43 
8.76 
10.20 
11.70 
13.20 
14.90 
16.80 
20.70 
25.10 
28.80 
34.90 
40.40 
46.20 
53. 30 
22 
.4=2.640 
1.70 
1.89 
2.08 
2.27 
2.46 
2.65 
2.84 
3.03 
3.22 
3.41 
3.60 
3.79 
4.17 
4.55 
4.92 
5.30 
5.60 
6.06 
6.44 
6.82 
7.58 
S.33 
9.09 
9. S5 
10.60 
11.40 
12.10 
H 
0.63 
.78 
.95 
1.13 
1.32 
1.57 
1.77 
2.01 
2.26 
2.54 
2.84 
3.15 
3.80 
4.53 
5.29 
6.14 
6.85 
8.02 
9.05 
10.20 
12.60 
15.10 
18.10 
21.30 
24.60 
28.40 
32.00 
24 
.4 = 3.142 
1.43 
1.59 
1.75 
1.91 
2.07 
2.23 
2.39 
2.55 
2.71 
2.86 
3.02 
3.18 
3.50 
3.82 
4.14 
4.46 
4.77 
5.09 
5.42 
5.73 
6.37 
7.00 
7.64 
8.27 
8.91 
9.55 
10.20 
II 
0.40 
.50 
.60 
.71 
.84 
.97 
1.12 
1.28 
1.44 
1.50 
1.79 
1.98 
2.41 
2.86 
3.37 
3.90 
4.46 
6.45 
7.94 
9.58 
11.40 
13.40 
15.60 
17.90 
20.40 
30 
= 4.t 
36 
.4 = 7.068 
V 
0.92 
1.02 
1.12 
1.22 
1.32 
1.42 
1.53 
1.63 
1.73 
1.83 
1.94 
2.04 
2.24 
2.45 
2.65 
2.85 
3.06 
3.26 
3.46 
3.67 
4.07 
4. 4S 
4.89 
5.30 
5.70 
'6.11 
6.52 
II 
V 
0.13 
.16 
.19 
.22 
.26 
.30 
.35 
.39 
.45 
.50 
.56 
.62 
.74 
.88 
1.04 
1.20 
1.39 
1. 57 2. 26 
1. 77 2. 40 
2. 00 2. 55 
0.64 
.71 
.78 
.85 
1.06 
1.13 
1.20 
1.27 
1.34 
1.41 
1.56 
1.70 
1.S4 
1.98 
2.12 
2.46 
2.98 
3.55 
4.10 
4.82 
5.59 
6.30 
2.83 
3.11 
3.40 
3. 68 
3.96 
4.24 
4.53 
0.05 
.06 
.07 
.12 
.13 
.15 
.17 
.19 
.21 
.24 
.29 
.34 
.40 
.46 
.53 
.60 
.68 
.77 
.94 
1.14 
1.37 
1.60 
1.S5 
2.12 
2.43 
1 This is the table that should be used in the design of pipe lines made from units 2 to 3 feet long, 
ordinarily made by hand in the pipe yards of the Pacific Coast States. 
