Calculate Drops in Compressed
Air Pipeline Fittings

Compressed Air Pipeline Pressure Drop Calculator

The pressure drop in compressed air lines can be calculated by using the formula:

dp = 7.57 q1.85 L 104 / d5 p

or

Pressure Drop (kg/cm) = 7.57 x Air Volume Flow1.85 (m3/min) x Length of Pipe (m) x (104 / Inside Diameter of Pipe (mm)5 x Initial Pressure (kg/cm2)

You may also use the calculator below to calculate the pressure drop in compressed air pipelines.

q - air volume flow (cfm)

L - pipe length (feet)

d - inside diameter pipe (inches)

p - initial pressure (psi)

Compressed Air Pipeline Fittings Drop Calculation

Equivilent Pipe Length (m)
Fitting Nominal Pipe Size (inches, mm)
1/2"
15		 3/4"
20		 1"
25		 1 1/4"
32		 1 1/2"
40		 2"
50		 2 1/2"
65		 3"
80		 4"
100		 5"
125

90 Degree Bend

90° Bend
 0.15 0.2 0.25 0.35 0.5 0.6 0.8 1.0 1.2 1.5

90 Degree Elbow

90° Elbow
 0.25 0.4 0.5 0.65 0.8 1.0 1.4 1.8 2.4 3.2

Tee Run

Tee-run
 0.2 0.3 0.4 0.5 0.7 0.85 1.1 1.3 1.6 2.0

Tee Side Outlet

Tee-side Outlet
 0.5 0.7 1.4 1.8 2.4 2.7 3.6 4.6 5.7 7.0

 
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