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Technical Info: Friction of Air in Pipes

Friction of Air in Pipes

CF/M of free air	.50"			.75"			1.00"
	80 lb	100 lb	125 lb	80 lb	100 lb	125 lb	80 lb	100 lb	125 lb
10	0.46	0.38	0.31	0.11	0.09	0.08	0.04	0.03	0.02
20	1.74	1.42	1.17	0.41	0.34	0.25	0.13	0.1	0.08
30	3.84	3.13	2.54	0.9	0.74	0.6	0.28	0.23	0.19
40	6.93	5.55	4.53	1.55	1.28	1.05	0.46	0.38	0.31
50	10.7	8.65	7.01	2.42	2	1.62	0.73	0.6	0.49
60				3.47	2.84	2.33	1.02	0.84	0.69
70				4.73	3.85	3.13	1.36	1.12	0.92
80				6.14	5.01	4.08	1.76	1.44	1.18
90				7.75	6.4	5.17	2.23	1.85	1.49
100				9.62	7.8	6.33	2.69	2.21	1.81
125				15.5	12.4	9.8	4.18	3.41	2.79
150				23	18.1	14.4	5.75	4.91	3.99
175							8.1	6.8	5.45
200							10.9	8.79	7.11
250

CF/M of free air	1.25"			1.50"
	80 lb	100 lb	125 lb	80 lb	100 lb	125 lb
10	0.0086	0.0071	0.0058
20	0.032	0.026	0.021	0.014	0.012	0.01
30	0.068	0.056	0.046	0.031	0.026	0.021
40	0.116	0.096	0.079	0.053	0.044	0.036
50	0.18	0.146	0.12	0.081	0.067	0.055
60	0.25	0.21	0.17	0.12	0.095	0.07
70	0.34	0.28	0.23	0.16	0.13	0.1
80	0.44	0.36	0.3	0.2	0.16	0.14
90	0.55	0.45	0.37	0.25	0.2	0.17
100	0.66	0.55	0.45	0.3	0.25	0.2
125	1.03	0.85	0.69	0.46	0.38	0.32
150	1.47	1.2	0.99	0.65	0.54	0.44
175	2	1.64	1.32	0.9	0.73	0.6
200	2.58	2.12	1.73	1.15	0.95	0.7
250	4.05	3.3	2.67	1.82	.48	1.7