Air Velocity in a Pipe

Using the equation and typical values of V, D and L explained to the right approximate values of P are computed as follows:

 

V = air velocity in feet per second
D = pipe inside diameter in inches
L = length of pipe in feet
P = pressure loss due to air friction in ounces/square inch

formula from B.F.Sturtevant Company

 

 Velocity
Ft/Sec  
  Pipe Diameter in Inches, 10' long
 1 246 10
1.0004.0002.0001.00007.00004
2.0016.0008.0004 .00030.00016
5.0100.0050.0025.00170.0010
10.0400.0200.0100.00670.0040
15.0900.0450 .0225.01500.0090
20.16000080.0400.02700.0160
25.2500.1250.0625.04170.0250
30.3600.1800.0900.06000.0360