Page 50 - HVAC Pump Handbook

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Piping System Friction
Piping System Friction 47

TABLE 3.5 Flow of Water in Steel Pipe (Continued )
42-in inside
diameter
V 2 h, ft per

Flow, gal/min V, ft/s 2 g, ft 100 ft of pipe
001000 0.232 0.00083 0.00047
001500 0.347 0.00187 0.00098
002000 0.463 0.00333 0.00164
002500 0.579 0.00521 0.00246
003000 0.695 0.00750 0.00343
003500 0.811 0.0102 0.00454
004000 0.926 0.0133 0.00580
004500 1.042 0.0169 0.00720
005000 1.16 0.0208 0.00874
006000 1.39 0.0300 0.0122
007000 1.62 0.0408 0.0162
008000 1.85 0.0533 0.0208
009000 2.08 0.0675 0.0258
010000 2.32 0.0833 0.0314
012000 2.78 0.120 0.0441
014000 3.24 0.163 0.0591
016000 3.71 0.213 0.0758
018000 4.17 0.270 0.0944
020000 4.63 0.333 0.115
025000 5.79 0.521 0.176
030000 6.95 0.750 0.250
035000 8.11 1.02 0.334
040000 9.26 1.33 0.433
045000 10.420 1.69 0.545
050000 11.6 2.08 0.668
060000 13.9 3.00 0.946
070000 16.2 4.08 1.27
080000 18.5 5.33 1.66
090000 20.8 6.75 2.08
100000 23.2 8.33 2.57
2
NOTE: V velocity, feet per second; V /2g velocity head, feet;
Hf friction loss, feet per 100 feet of pipe. No aging factor, manufac-
turer’s tolerance, or any factor of safety has been included in the
friction losses Hf.
SOURCE: Data in this table have been derived from the
Engineering Data Book, 2d ed., Hydraulic Institute, Parsippany,
N.J., 1990.

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