Dimensions: Steel Pipes schedule 40 & 80 , PVC and CPVC Pipes Schedule 40 & 80 , Copper Tubes and PEX Tubes
Fluid flow velocity in a circular pipe can be calculated with SI units as
v = 1.273 q / d 2 (2)
v = velocity (m/s)
q = volume flow (m 3 /s)
d = pipe inside diameter (m)
60 US gal/min is flowing through a 4 inch schedule 80 steel pipe . The internal diameter of the pipe is 3.83 in . The velocity can be calculated as
v = 0.4085 ( 60 gal/min ) / (3.83 in) 2
= 1.7 ft/s
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Water velocities in pipes and tubes should not exceed certain limits.
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