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Pipe Sizing Chart


Use the table below to determine the diameter of the pipe required for your installation

  1. Select the flow rate of the compressor 
  2. Select the distance between the compressor and the furthest most point of the installation
  3. Cross the lines of flow rate and distance columns to establish the size of pipe you require
  4. Example – 42cfm compressor with a maximum pipework distance of 200 metres (to the furthest usage point) will require a 32mm pipework system
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Flow Rate

Distance between compressor and the furthest usage point

NI/min
Nm3/h
cfm
25m 
82ft
50m
164ft
100m
328ft
150m
492ft
200m
656ft
300m
984ft
400m
1312ft
500m
1640ft
1000m
3280ft
1500m
4921ft
2000m
6562ft
230 14 8 20 20 20 20 20 20 20 20 20 25 25
650 39 23 20 20 20 20 25 25 25 25 32 32 40
900 54 32 20 20 25 25 32 32 32 32 40 40 40
1200 72 42 20 20 25 25 32 32 32 32 40 40 50
1750 105 62 20 25 32 32 32 40 40 40 50 50 50
2000 120 71 25 25 32 32 32 40 40 40 50 50 50
2500 150 88 25 32 32 32 40 40 40 50 50 63 63
3000 180 106 25 32 32 40 40 40 50 50 50 63 63
3500 210 124 25 32 40 40 40 50 50 50 63 63 63
4000 270 159 32 32 40 40 50 50 50 50 63 63 80
6000 360 212 32 40 50 50 50 50 63 63 80 80 80
7000 420 247 32 40 50 50 50 63 63 63 80 80 80
8500 510 300 40 40 50 50 63 63 63 63 80 80 110
12000 720 424 40 50 63 63 63 80 80 80 110 110 110
15000 900 530 50 50 63 63 80 80 80 80 110 110 110
18000 1080 636 50 63 63 80 80 80 80 110 110 110 110
21000 1260 742 50 63 63 80 80 80 110 110 110 110 110
26000 1560 918 63 63 80 80 80 110 110 110 110 110 110
31000 1860 1095 63 63 80 80 110 110 110 110 110 110 110*
33000 1980 1165 63 80 80 110 110 110 110 110 110 110* 110*
44000 2640 1554 63 80 110 110 110 110 110 110 110* 110* 110*
50000 3000 1766 80 80 110 110 110 110 110 110 110* 110* 110*
58000 3480 2048 80 80 110 110 110 110 110 110 110* 110* 110*
67000 4020 2366 80 110 110 110 110 110 110 110* 110* 110* 110*
75000 4500 2648 80 110 110 110 110 110 110* 110* 110* 110* 110*
83000 4980 2931 80 110 110 110 110 110* 110* 110* 110* 110* 110*
92000 5520 3249 110 110 110 110 110 110* 110* 110* 110* 110* 110*
100000 6000 3531 110 110 110 110 110* 110* 110* 110* 110* 110* 110*

Pressure 7 bar - Total pressure drop 4%

*Pressure drop is greater than 4%

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