Section 12: Supplemental Data

Overview

Table 12.1: Commonly Used Constants Velocity Heads (v ²/2g)
Velocity (feet per second)	Velocity head (feet)	Velocity (feet per second)	Velocity head (feet)
2.0	0.062	6.0	0.559
2.2	0.075	6.2	0.597
2.4	0.089	6.4	0.636
2.6	0.105	6.6	0.675
2.8	0.122	6.8	0.718
3.0	0.140	7.0	0.761
3.2	0.159	7.2	0.805
3.4	0.180	7.4	0.850
3.6	0.201	7.6	0.897
3.8	0.224	7.8	0.945
4.0	0.248	8.0	0.994
4.2	0.274	8.2	1.044
4.4	0.301	8.4	1.096
4.6	0.329	8.6	1.148
4.8	0.351	8.8	1.202
5.0	0.388	9.0	1.258
5.2	0.420	9.2	1.314
5.4	0.453	9.4	1.372
5.6	0.487	9.6	1.431
5.8	0.522	9.8	1.491
1 CFS = 0.646 MGD	? inch = 0.01 feet approx.
1.55 CFS = 1 MGD	1 cu. ft. = 7.48 gallons
1 MGD = 694.44 GPM	1 gal. = 0.134 cu. ft.
1 ft. head = 0.433 psi	1 sq. mile = 640 acres
1 psi = 2.31 ft. head	1 acre = 43,560 sq. ft.
(Source: National Clay Pipe Institute)

Volume and Weight

1 U. S. gallon = 8.34 lbs Sp Gr

1 U. S. gallon = 0.84 Imperial gallon

1 cu ft of liquid= 7.48 gal

1 cu ft of liquid = 62.32 lbs Sp Gr

Specific gravity of sea water = 1.025 to 1.03

1 cu meter = 264.5 gal

1 barrel (oil) = 42 gal

Capacity and Velocity

1 gpm = 449 cu ft per sec

gpm = 0.069 boiler Hp

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