BOY26.TAB EXHIBIT A
It is frequently desired to know what number of pipe of a given size is equal in carrying capacity to one pipe of a larger size. At the same
velocity of flow the volume delivered by two (2) pipes of different sizes is pro portional to the squares of their diameters; thus one four - inch pipe
will deliver the same volume as four (4) two - inch pipes. With the same head, however, the velocity is less in the smaller pipe, and the volume
delivered varies about as their diameter rat io to the 2.65 power. This table is calculated on this basis. The figure opposite the intersection of any
two (2) sizes is the number of the smaller - size type required to equal one of the larger: thus, 1/6 unit equals 2.9 four - inch.
Equation of Pipe
Diam eter
Inches ½ ¾ 1 2 3 4 5 6 7 8 10 12
14
2 39.4 13.5 6.3 1.0
3 115 39.4 18.4 2.9 1.0
4 247 84.4 39.4 6.3 2.1 1.0
5 447 153 71.2 11.3 3.9 1.8 1.0
6 724 247 115 18.4 6.3 2.9 1.6 1.0
7 1,090 372 174 27.7 9.4 4.4 2.4 1.5 1.0
8 530 247 39.4 13.5 6.3 3.5 2.1 1.4 1.0
10 957 447 71.2 24.3 11.3 6.3 3.9 2.6 1.8 1.0
11 575 91.6 31.3 14.6 8.1 5.0 3.3 2.3 1.3
12 724 115 39.4 18.4 10.2 6.3 4.2 2.9 1.6 1.0
13 895 143 48.7 22.7 12.6 7.8 5.2 3.6 2.0 1.2
14 1,090 174 59.3 27.7 15.3 9.4 6.3 4.4 2.4 1.5 1
1 5 1,308 208 71.2 33.2 18.4 11.3 7.5 5.3 2.9 1.8 1
16 247 84.4 39.4 21.8 13.5 8.9 6.3 3.5 2.1 1
17 290 99.2 46.3 25.6 15.8 10.5 7.4 4.1 2.5 1
18 338 115 53.8 29.8 18.4 12.2 8.6 4.7 2.9 1
19 390 133 62.1 34.4 21.2 14.1 9.9 5.5 3.4 2
20 447 1 53 71.2 39.4 24.3 16.2 11.3 6.3 3.9 2
22 575 196 91.6 50.7 31.3 20.8 14.6 8.1 5.0 3
24 724 247 115 63.8 39.4 26.2 18.4 10.2 6.3 4
30 33.2 18.4 11.3 7
36 29.8 18.4
12
42 44.8 27.7
18
48 63.8 39.4
26
(Ord. No. 80 - 10, 4 - 1 - 80)