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934
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Air Hose Friction
+ pressure loss is too great and therefore the combination of hose size, CFM, and gauge pressure is not recommended. Gauge
pressures the indicated air pressure in pounds/square inch, at the source (i.e. the air compressor receiver tank)
Hose Size
(inches)
CFM thru
50' Hose
Gauge Pressure - Pounds/sq inch
50
70
90
110
PSI Loss Over 50' Hose Length
½"
20
1.8
1.0
.8
.6
30
5.0
3.4
2.4
2.0
40
10.1
7.0
5.4
4.3
50
18.1
12.4
9.5
7.6
60
+
20.0
14.8
12.0
70
+
28.4
22.0
17.6
80
+
+
30.5
24.6
90
+
+
41.0
33.3
10
+
+
+
44.5
110
+
+
+
+
¾"
20
04
.2
.2
.1
30
.08
.5
.4
.3
40
1.5
.9
.7
.5
50
2.4
1.5
1.1
.9
60
3.5
2.3
1.6
1.3
70
4.4
3.2
2.3
1.8
80
6.5
4.2
3.1
2.4
90
8.5
5.5
4.0
3.1
100
11.4
7.0
5.0
3.9
110
14.2
8.8
6.2
4.9
120
+
11.0
7.5
5.9
130
+
+
9.0
7.1
1"
20
.1
0
0
0
30
.2
.1
.1
.1
40
.3
.2
.2
.2
50
.5
.4
.3
.2
60
.8
.5
.4
.3
70
1.1
.7
.6
.4
80
1.5
1.0
.7
.6
90
2.0
1.3
.9
.7
100
2.6
1.6
1.2
.9
110
3.5
2.0
1.4
1.1
120
4.8
2.5
1.7
1.3
130
7.0
3.1
2.0
1.5
•
PSI = pressure in pounds/square inch
•
CFM = air flow in cubic feet/minute
Air