# Compressed Air Pressure Drop Diagrams - Metric Units

## Pressure drop in compressed air pipe lines

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Pressure drop in *kg/m ^{2} per 100 m* compressed air pipelines can be estimated for some typical entering pressures in the diagrams below. The diagrams are calculated for schedule 40 pipes.

Other dimensions or pressures can be calculated with the

### Compressed Air Entering Pressure *5 kg/cm*^{2}

^{2}

*1 kg/cm*^{2}= 0.98 bar = 735 mmHg = 10000 mmH_{2}O = 14.2 psi*1 m*^{3}/min = 0.017 m^{3}/s = 60 m^{3}/h = 1000 liter/min = 35.3 cfm*1 m (meter) = 3.2808 ft = 39.37 in*

### Compressed Air Entering Pressure *7.5 kg/cm*^{2}

^{2}

### Compressed Air Entering Pressure *10 kg/cm*^{2}

^{2}

### Compressed Air Entering Pressure *13 kg/cm*^{2}

^{2}

### Compressed Air Pressure Drop for Pipe Other than Schedule 40

Compressed air pressure drop in pipes other than schedule 40 can be calculated as

dp = dp_{40}(d_{40 }/ d)^{5}(1)

where

dp = actual pressure drop (bar per 100 m pipe)

dp_{40}= pressure drop in schedule 40 pipe from the table or diagram above (bar per 100 m pipe)

d_{40}= inside diameter schedule 40 pipe (inches)

d = actual inside diameter (inches)

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