The pressure of water in pounds per square inch for every ft. in height
to 300 feet and then by intervals to 1,000 feet head. By this table,
from the pounds pressure per square inch, the feet head is readily
obtained and _vice versa_.
=======+===========
Feet | Pressure
Head. |per sq. in.
-------+-----------
1 | 0.43
2 | 0.86
3 | 1.30
4 | 1.73
5 | 2.16
6 | 2.59
7 | 3.03
8 | 3.46
9 | 3.89
10 | 4.33
11 | 4.76
12 | 5.20
13 | 5.63
14 | 6.06
15 | 6.49
16 | 6.93
17 | 7.36
18 | 7.79
19 | 8.22
20 | 8.66
21 | 9.09
22 | 9.53
23 | 9.96
24 | 10.39
25 | 10.82
26 | 11.26
27 | 11.69
28 | 12.12
29 | 12.55
30 | 12.99
31 | 13.42
32 | 13.86
33 | 14.29
34 | 14.72
35 | 15.16
36 | 15.59
37 | 16.02
38 | 16.45
39 | 16.89
40 | 17.32
41 | 17.75
42 | 18.19
43 | 18.62
44 | 19.05
45 | 19.49
46 | 19.92
47 | 20.35
48 | 20.79
49 | 21.22
=50= | 21.65
51 | 22.09
52 | 22.52
53 | 22.95
54 | 23.39
55 | 23.82
56 | 24.26
57 | 24.69
58 | 25.12
59 | 25.55
60 | 25.99
61 | 26.42
62 | 26.85
63 | 27.29
64 | 27.72
65 | 28.15
66 | 28.58
67 | 29.02
68 | 29.45
69 | 29.88
70 | 30.32
71 | 30.75
72 | 31.18
73 | 31.62
74 | 32.05
75 | 32.48
76 | 32.92
77 | 33.35
78 | 33.78
79 | 34.21
80 | 34.65
81 | 35.08
82 | 35.52
83 | 35.95
84 | 36.39
85 | 36.82
86 | 37.25
87 | 37.68
88 | 38.12
89 | 38.53
90 | 38.98
91 | 39.42
92 | 39.85
93 | 40.28
94 | 40.72
95 | 41.15
96 | 41.58
97 | 42.01
98 | 42.45
99 | 42.88
=100= | 43.31
101 | 43.75
102 | 44.18
103 | 44.61
104 | 45.05
105 | 45.48
106 | 45.91
107 | 46.34
108 | 46.78
109 | 47.21
110 | 47.64
111 | 48.08
112 | 48.51
113 | 48.94
114 | 49.38
115 | 49.81
116 | 50.24
117 | 50.68
118 | 51.11
119 | 51.54
120 | 51.98
121 | 52.41
122 | 52.84
123 | 53.28
124 | 53.71
125 | 54.15
126 | 54.58
127 | 55.01
128 | 55.44
129 | 55.88
130 | 56.31
131 | 56.74
132 | 57.18
133 | 57.61
134 | 58.04
135 | 58.48
136 | 58.91
137 | 59.34
138 | 59.77
139 | 60.21
140 | 60.64
141 | 61.07
142 | 61.51
143 | 61.94
144 | 62.37
145 | 62.81
146 | 63.24
147 | 63.67
148 | 64.10
149 | 64.54
=150= | 64.97
151 | 65.40
152 | 65.84
153 | 66.27
154 | 66.70
155 | 67.14
156 | 67.57
157 | 68.00
158 | 68.43
159 | 68.87
160 | 69.31
161 | 69.74
162 | 70.17
163 | 70.61
164 | 71.04
165 | 71.47
166 | 71.91
167 | 72.34
168 | 72.77
169 | 73.29
170 | 73.64
171 | 74.07
172 | 74.50
173 | 74.94
174 | 75.37
175 | 75.80
176 | 76.23
177 | 76.67
178 | 77.10
179 | 77.53
180 | 77.97
181 | 78.40
182 | 78.84
183 | 79.27
184 | 79.70
185 | 80.14
186 | 80.57
187 | 81.00
188 | 81.43
189 | 81.87
190 | 82.30
191 | 82.73
192 | 83.17
193 | 83.60
194 | 84.03
195 | 84.47
196 | 84.90
197 | 85.33
198 | 85.76
199 | 86.20
=200= | 86.63
201 | 87.07
202 | 87.50
203 | 87.93
204 | 88.36
205 | 88.80
206 | 89.21
207 | 89.66
208 | 90.10
209 | 90.53
210 | 90.96
211 | 91.39
212 | 91.83
213 | 92.26
214 | 92.69
215 | 93.13
216 | 93.56
217 | 93.99
218 | 94.43
219 | 94.86
220 | 95.30
221 | 95.73
222 | 96.16
223 | 96.60
224 | 97.03
225 | 97.46
226 | 97.90
227 | 98.33
228 | 98.76
229 | 99.20
230 | 99.63
231 | 100.00
232 | 100.49
233 | 100.93
234 | 101.36
235 | 101.79
236 | 102.23
237 | 102.66
238 | 103.09
239 | 103.53
240 | 103.96
241 | 104.39
242 | 104.83
243 | 105.26
244 | 105.69
245 | 106.13
246 | 106.56
247 | 106.99
248 | 107.43
249 | 107.86
=250= | 108.29
251 | 108.73
252 | 109.15
253 | 109.59
254 | 110.03
255 | 110.46
256 | 110.89
257 | 111.32
258 | 111.76
259 | 112.19
260 | 112.62
261 | 113.03
262 | 113.49
263 | 113.92
264 | 114.36
265 | 114.79
266 | 115.22
267 | 115.66
268 | 116.09
269 | 116.52
270 | 116.96
271 | 117.39
272 | 117.82
273 | 118.26
274 | 118.69
275 | 119.12
276 | 119.56
277 | 119.99
278 | 120.42
279 | 120.85
280 | 121.29
281 | 121.73
282 | 122.15
283 | 122.59
284 | 123.02
285 | 123.45
286 | 123.89
287 | 124.32
288 | 124.75
289 | 125.18
290 | 125.62
291 | 126.05
292 | 126.48
293 | 126.92
294 | 127.35
295 | 127.78
296 | 128.22
297 | 128.65
298 | 129.08
299 | 129.51
=300= | 129.95
310 | 134.28
320 | 138.62
330 | 142.95
340 | 147.28
=350= | 151.61
360 | 155.94
370 | 160.27
380 | 164.61
390 | 168.94
=400= | 173.27
500 | 216.58
600 | 259.90
700 | 303.22
800 | 346.54
900 | 389.86
1000 | 433.18
-------+--------
TABLE OF FRICTION HEADS IN FEET IN SMALL PIPES 100 FEET LONG UNDER
GIVEN DISCHARGE.
-----------+----------++-----------------------------
| Gallons || 1/2-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+----------++---------------+-------------
2.5 | 3,600 || 4.08 | 18.20
5 | 7,200 || 8.17 | 66.82
7.5 | 10,800 || 12.25 | 142.9
10 | 14,400 || 16.33 | 243.3
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 3/4-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+----------++---------------+-------------
2.5 | 3,600 || 1.81 | 2.78
5 | 7,200 || 3.63 | 9.40
7.5 | 10,800 || 5.44 | 20.17
10 | 14,400 || 7.25 | 34.77
12.5 | 18,000 || 9.06 | 52.11
15 | 21,600 || 10.87 | 73.61
17.5 | 25,200 || 12.69 | 98.80
20 | 28,800 || 14.50 | 127.6
22.5 | 32,400 || 16.31 | 160.7
25 | 36,000 || 18.12 | 197.7
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 1-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+----------++---------------+-------------
2.5 | 3,600 || 1.02 | .74
5 | 7,200 || 2.04 | 2.52
7.5 | 10,800 || 3.06 | 5.14
10 | 14,400 || 4.08 | 8.75
12.5 | 18,000 || 5.10 | 13.22
15 | 21,600 || 6.13 | 18.84
17.5 | 25,200 || 7.15 | 25.14
20 | 28,800 || 8.17 | 32.27
22.5 | 32,400 || 9.18 | 40.17
25 | 36,000 || 10.20 | 48.90
30 | 43,200 || 12.23 | 68.70
35 | 50,400 || 14.25 | 92.10
40 | 57,600 || 16.29 | 116.8
45 | 64,800 || 18.34 | 150.6
50 | 72,000 || 20.37 | 186.7
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 1-1/4-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+----------++---------------+-------------
5 | 7,200 || 1.31 | .83
10 | 14,400 || 2.62 | 2.85
15 | 21,600 || 3.92 | 5.90
20 | 28,800 || 5.22 | 10.21
25 | 36,000 || 6.53 | 15.50
30 | 43,200 || 7.84 | 22.34
35 | 50,400 || 9.14 | 28.99
40 | 57,600 || 10.45 | 37.29
45 | 64,800 || 11.76 | 46.47
50 | 72,000 || 13.07 | 57.16
55 | 79,200 || 14.38 | 68.62
60 | 86,400 || 15.69 | 81.35
65 | 93,600 || 17.00 | 95.11
70 | 100,800 || 18.31 | 109.9
75 | 108,000 || 19.62 | 126.1
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 1-1/2-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+----------++---------------+-------------
5 | 7,200 || .91 | .51
10 | 14,400 || 1.82 | 1.33
15 | 21,600 || 2.73 | 2.80
20 | 28,800 || 3.63 | 4.59
25 | 36,000 || 4.54 | 6.99
30 | 43,200 || 5.45 | 9.86
35 | 50,400 || 6.36 | 13.14
40 | 57,600 || 7.26 | 16.94
45 | 64,800 || 8.17 | 21.09
50 | 72,000 || 9.08 | 25.66
60 | 86,400 || 10.90 | 36.15
70 | 100,800 || 12.72 | 48.84
80 | 115,200 || 14.54 | 63.53
90 | 129,600 || 16.36 | 79.78
100 | 144,000 || 18.17 | 98.23
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 2-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+------- --++---------------+-------------
5 | 7,200 || 1 | ...
10 | 14,400 || 1.02 | .31
20 | 28,800 || 2.04 | 1.17
30 | 43,200 || 3.06 | 2.36
40 | 57,600 || 4.09 | 4.17
50 | 72,000 || 5.11 | 6.34
60 | 86,400 || 6.13 | 8.92
70 | 100,800 || 7.15 | 11.83
80 | 115,200 || 8.18 | 15.27
90 | 129,600 || 9.20 | 19.11
100 | 144,000 || 10.22 | 23.23
125 | 180,000 || 12.80 | 35.78
150 | 216,000 || 15.3 | 50.60
175 | 252,000 || 17.9 | 69.13
200 | 288,000 || 20.4 | 89.51
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 2-1/2-IN. DIAM..
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+------- --++---------------+-------------
25 | 36,000 || 1.63 | .58
50 | 72,000 || 3.26 | 2.10
75 | 108,000 || 4.90 | 4.58
100 | 144,000 || 6.53 | 7.95
125 | 180,000 || 8.16 | 12.10
150 | 216,000 || 9.80 | 17.05
175 | 252,000 || 11.43 | 22.88
200 | 288,000 || 13.07 | 29.67
225 | 324,000 || 14.70 | 37.14
250 | 360,000 || 16.34 | 45.81
275 | 396,000 || 17.97 | 55.32
300 | 432,000 || 19.60 | 65.68
350 | 468,000 || 21.24 | 77.01
400 | 576,000 || 22.87 | 89.11
-----------+----------++---------------+-------------
-----------+----------++-----------------------------
| Gallons || 3-IN. DIAM.
Gallons |discharged|+---------------+-------------
discharged | per 24 ||Velocity in ft.|Friction head
per minute.| hours. || per second. | in feet.
-----------+------- --++---------------+-------------
50 | 72,000 || 2.27 | .88
75 | 108,000 || 3.40 | 1.90
100 | 144,000 || 4.54 | 3.29
125 | 180,000 || 5.67 | 5.00
150 | 216,000 || 6.81 | 7.05
175 | 252,000 || 7.94 | 9.41
200 | 288,000 || 9.08 | 12.13
225 | 324,000 || 10.22 | 15.17
250 | 360,000 || 11.36 | 18.69
275 | 396,000 || 12.50 | 22.52
300 | 432,000 || 13.64 | 26.26
350 | 468,000 || 15.91 | 35.80
400 | 576,000 || 18.18 | 46.64
450 | 648,000 || 20.45 | 88.70
500 | 720,000 || 22.72 | 73.82
-----------+----------++---------------+-------------
Contents of cylinders, in cubic feet and in U. S. gallons, for one foot
of length.
-----------+-------------+-----------------------
| | FOR 1 FOOT
| | IN LENGTH.
| +------------+----------
Diameter in| Diameter in | Cubic Feet.|Gallons of
Inches. |Decimals of a|Also area in| 231 Cubic
| Foot. |square feet.| Inches.
-----------+-------------+------------+----------
1/4 | .0208 | .0003 | .0026
5/16 | .0260 | .0005 | .0040
3/8 | .0313 | .0008 | .0057
7/16 | .0365 | .0010 | .0078
1/2 | .0417 | .0014 | .0102
9/16 | .0469 | .0017 | .0129
5/8 | .0521 | .0021 | .0159
11/16 | .0573 | .0026 | .0193
3/4 | .0625 | .0031 | .0230
13/16 | .0677 | .0036 | .0270
7/8 | .0729 | .0042 | .0312
15/16 | .0781 | .0048 | .0359
1. | .0833 | .0055 | .0408
1/4 | .1042 | .0085 | .0638
1/2 | .1250 | .0123 | .0918
3/4 | .1458 | .0168 | .1250
2. | .1667 | .0218 | .1632
1/4 | .1875 | .0276 | .2066
1/2 | .2083 | .0341 | .2550
3/4 | .2292 | .0413 | .3085
3. | .2500 | .0491 | .3673
1/4 | .2708 | .0576 | .4310
1/2 | .2917 | .0668 | .4998
3/4 | .3125 | .0767 | .5738
4. | .3333 | .0878 | .6528
1/4 | .3542 | .0985 | .7370
1/2 | .3750 | .1105 | .8263
3/4 | .3958 | .1231 | .9205
5. | .4167 | .1364 | 1.020
1/4 | .4375 | .1503 | 1.124
1/2 | .4583 | .1650 | 1.234
3/4 | .4792 | .1803 | 1.349
6. | .5000 | .1963 | 1.469
1/4 | .5208 | .2180 | 1.594
1/2 | .5417 | .2305 | 1.724
3/4 | .5625 | .2485 | 1.859
7. | .5833 | .2673 | 1.999
1/4 | .6042 | .2868 | 2.144
1/2 | .6250 | .3068 | 2.295
3/4 | .6458 | .3275 | 2.450
8. | .6667 | .3490 | 2.611
1/4 | .6875 | .3713 | 2.777
1/2 | .7083 | .3940 | 2.948
3/4 | .7292 | .4175 | 3.125
9. | .7500 | .4418 | 3.305
1/4 | .7708 | .4668 | 3.492
1/2 | .7917 | .4923 | 3.682
3/4 | .8125 | .5185 | 3.879
10. | .8333 | .5455 | 4.081
1/4 | .8542 | .5730 | 4.286
1/2 | .8750 | .6013 | 4.498
3/4 | .8958 | .6303 | 4.714
11. | .9167 | .6600 | 4.937
1/4 | .9375 | .6903 | 5.163
1/2 | .9583 | .7213 | 5.395
3/4 | .9792 | .7530 | 5.633
12. | 1 Foot. | .7854 | 5.876
1/2 | 1.042 | .8523 | 6.375
13. | 1.083 | .9218 | 6.895
1/2 | 1.125 | .9940 | 7.435
14. | 1.167 | 1.069 | 7.997
1/2 | 1.208 | 1.147 | 8.578
15. | 1.250 | 1.227 | 9.180
1/2 | 1.292 | 1.310 | 9.801
16. | 1.333 | 1.396 | 10.44
1/2 | 1.375 | 1.485 | 11.11
17. | 1.417 | 1.576 | 11.79
1/2 | 1.458 | 1.670 | 12.50
18. | 1.500 | 1.767 | 13.22
1/2 | 1.542 | 1.867 | 13.97
19. | 1.583 | 1.969 | 14.73
1/2 | 1.625 | 2.074 | 15.52
20. | 1.666 | 2.182 | 16.32
1/2 | 1.708 | 2.292 | 17.15
21. | 1.750 | 2.405 | 17.99
1/2 | 1.792 | 2.521 | 18.86
22. | 1.833 | 2.640 | 19.75
1/2 | 1.875 | 2.761 | 20.65
23. | 1.917 | 2.885 | 21.58
1/2 | 1.958 | 3.012 | 22.53
24. | 2.000 | 3.142 | 23.50
25. | 2.083 | 3.409 | 25.50
26. | 2.166 | 3.687 | 27.58
27. | 2.250 | 3.976 | 29.74
28. | 2.333 | 4.276 | 31.99
29. | 2.416 | 4.587 | 34.31
30. | 2.500 | 4.909 | 36.72
31. | 2.583 | 5.241 | 39.21
32. | 2.666 | 5.585 | 41.78
33. | 2.750 | 5.940 | 44.43
34. | 2.833 | 6.305 | 47.17
35. | 2.916 | 6.681 | 49.98
36. | 3.000 | 7.069 | 52.88
37. | 3.083 | 7.468 | 55.86
38. | 3.166 | 7.876 | 58.92
39. | 3.250 | 8.296 | 62.06
40. | 3.333 | 8.728 | 65.29
41. | 3.416 | 9.168 | 68.58
42. | 3.500 | 9.620 | 71.96
43. | 3.583 | 10.084 | 75.43
44. | 3.666 | 10.560 | 79.00
45. | 3.750 | 11.044 | 82.62
46. | 3.833 | 11.540 | 86.32
47. | 3.916 | 12.048 | 90.12
48. | 4.000 | 12.566 | 94.02
-----------+-------------+------------+----------
231 cubic inches equal one gallon, and 7.4805 gallons equal one cubic
foot.
For the contents of a greater diameter than any in the table, take
the quantity opposite one-_half_ said diameter and multiply it by 4.
Thus, the number of cubic feet in one foot length of a pipe 80 inches
in diameter, is equal to 8.728 × 4 = 34.912 cubic feet. So also with
gallons and areas.