Compressed Air - Pressure Drop in Pipe Lines - Online Pressure Drop Calculator

Calculate pressure drops in compressed air pipe lines - Online Pressure Drop Calculator and Spreadsheets - metric and imperial units

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

dp = 7.57 q1.85 L 104 / (d5 p)         (1)

where

dp = pressure drop (kg/cm2)

q = air volume flow at atmospheric conditions (FAD) (m3/min)

L = length of pipe (m)

d = inside diameter of pipe (mm)

p = initial abs. pressure (kg/cm2)

  • 1 kg/cm2 = 98068 Pa = 0.98 bar = 0.97 atmosphere = 736 mm Hg = 10000 mm H2O = 10 m H2O = 2050 psf = 14.2 psi = 29 in Hg = 394 in H2O = 32.8 ft H2O

Online Compressed Air Pipeline Pressure Drop Calculator - Metric Units

The calculator below can used to calculate the pressure drop in compressed air pipelines.

q - air volume flow at atmospheric conditions (FAD) (m3/min)

L - pipe length (m)

d - inside diameter pipe (mm)

p - initial abs. pressure (kg/cm2)

Online Compressed Air Pipeline Pressure Drop Calculator - Imperial Units

The calculator below can used to calculate the pressure drop in compressed air pipelines.

q - air volume flow at atmospheric conditions (FAD) (cfm)

L - pipe length (feet)

d - inside diameter pipe (inches)

p - initial abs. pressure (psi)

NOTE! Pressure drops above 1 kg/cm2 (14-15 psi) are in general not relevant. The formula used may not be valid.

Compressed Air Pipeline Pressure Drop Spreadsheet

Calculations can be done for other pressures and/or pipe lengths by using this excel spreadsheet (metric units).

The same spreadsheet including different types of pipes (imperial units).

Or, alternatively - Compressed Air - Pressure Drop in Pipe Lines - in Google Docs. You can open, save and modify your own copy of the Google spreadsheet if you are signed into your Google Account.

Compressed Air Pipeline Pressure Drop Table - Initial abs. Pressure 7 kg/cm2 (100 psig)

Pressure drops in 100 m (330 ft) compressed air  schedule 40 steel pipe lines are indicated in the tables below:

compressed air pipeline pressure drop table

compressed air pipeline pressure drop table

Related Topics

  • Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more

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