Compressed Air Pipe Size

To minimize the effect that pressure drop has on your airflow system, you need to install the right sized compressed air pipes. Be sure to calculate the correct pipe size from the start of your project, to avoid spending a lot more money in the future.

Any kind of obstruction can lead to a pressure drop in your system. Things like a flexible hose, pipe length, quick-connect coupling, and the list go on. These are all things that play a part in the pressure drop through your compressed air system. See more size charts here.

Compressed Air Pipe Size CFM Chart

The table below gives the exact pipe size needed for each specific airflow and piping distance. Keep in mind that the pipe size is measured in inches.

Free Air Flow (cfm)Length of Pipe (feet) 25Length of Pipe (feet) 50Length of Pipe (feet) 75Length of Pipe (feet) 100Length of Pipe (feet) 150Length of Pipe (feet) 200Length of Pipe (feet) 250
51/21/21/21/21/21/21/2
101/21/21/21/21/21/21/2
151/21/21/21/23/43/43/4
201/21/23/43/43/43/43/4
251/23/43/43/43/411
301/23/43/43/4111
353/43/43/43/4111
403/43/43/41111
453/43/411111 1/4
503/411111 1/41 1/4
553/41111 1/41 1/41 1/4
603/41111 1/41 1/41 1/4
653/41111 1/41 1/41 1/4
703/4111 1/41 1/41 1/41 1/4
751111 1/41 1/41 1/41 1/4
80111 1/41 1/41 1/41 1/41 1/4
85111 1/41 1/41 1/41 1/41 1/4
90111 1/41 1/41 1/41 1/41 1/2
9511 1/41 1/41 1/41 1/41 1/41 1/2
10011 1/41 1/41 1/41 1/41 1/21 1/2

The table above measures airflow in CFM (Cubic Feet per Minute) and measures the length of the pipe in feet. The pipe size is measured in inches.