TABLE 5-6
Reasonable Velocities for the Flow of Water Through Pipe
(Reproduced with permission from "Flow of Fluids Through Valves, Fittings,
and Pipe", Technical Paper No. 410, Copyright 1965, Crane Company)
Service Condition
Reasonable Velocity
Boiler Feed . . . . . . . . . . . . 8 to 15 feet per second
Pump Suction and Drain Lines. . . . 4 to 7 feet per second
General Service . . . . . . . . . . 4 to 10 feet per second
City . . . . . . . . . . . . . . .
to 7 feet per second
TABLE 5-7
Reasonable Velocities for the Flow of Steam Through Pipe
(Reproduced with permission from "Flow of Fluids Through Valves, Fittings,
and Pipe", Technical Paper No. 410, Copyright 1965, Crane Company)
Condition Pressure
Service
Reasonable
of
(P)
Velocity
Steam
Psig
(V)
Feet per Second
Saturated 0 to 25 Heating (short lines)
66 - 100
25 and up Power house equipment, process piping etc.
100 - 166
Superheated200 and upBoiler and turbine leads, etc.
116 - 333
TABLE 5-8
Schedule (Thickness of Steel Pipe Used in Obtaining Resistance
of Valves and Fittings of Various Pressure Classes by Test)
(Reproduced with permission from "Flow of Fluids Through Valves, Fittings,
and Pipe", Technical Paper No. 410, Copyright 1965, Crane Company)
Valve or Fitting
Schedule No.
*These schedule numbers have
ASA Pressure Classification
of Pipe
been arbitrarily selected
(Steam Rating)
(Thickness)
only for the purpose of
identifying the various
250-Pound and Lower
Schedule 40
pressure classes of valves
300-Pound to 600-Pound
Schedule 80
of valves and fittings with
900-Pound
Schedule 120
specific pipe dimensions for
1500-Pound
Schedule 160
the interpretation of flow
test data; they should not
2500-Pound Sizes 1/2 to 6-inch xx (Double Extra be construed as a recommen
Sizes 8-inch and
Strong)
dation for installation
larger
Schedule 160
purposes.
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