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Steel Pipe Flow Loss Friction for sizes 4 " to 8 " inch diameter

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Steel Pipe Flow Loss Friction for sizes 4 " to 8 " inch diameter

Tables are for steel pipe with a surface roughness of C=100.

See also

• Steel Pipe Flow Friction Loss for sizes 10" to 12 " inch diameter
• Friction Losses in Steel Pipes size 0.5 to 1.25 inch diameter
• Friction Loss in Steel Pipe 1.5" to 3" inch diameter

To adjust for different surface roughness factors, use the following correction factors:

Value of C	150	140	130	120	110	100	90	80	70	60
-	0.47	0.54	0.62	0.71	0.84	1.00	1.22	1.51	1.93	2.57

 

Friction Losses in Pipe: Standard Weight Steel 4" Dia.
Pipe Size, in. 4	Pipe Dia., in. 4.026 Velocity, fps	Surface Rough C 100 hd. loss, ft/100 ft
gpm
65	1.64	0.54
70	1.76	0.62
75	1.89	0.70
80	2.02	0.79
85	2.14	0.88
90	2.27	0.98
95	2.39	1.08
100	2.52	1.19
110	2.77	1.42
120	3.02	1.67
130	3.28	1.93
140	3.53	2.22
150	3.78	2.52
160	4.03	2.84
170	4.28	3.2
180	4.54	3.5
190	4.79	3.9
200	5.04	4.3
210	5.29	4.7
220	5.54	5.1
230	5.80	5.6
240	6.05	6.0
260	6.55	7.0
280	7.06	8.0
300	7.56	9.1

 

Friction Losses in Pipe: Standard Weight Steel 5 " Dia.
Pipe Size, in. 5.0	Pipe Dia., in. 5.047 Velocity, fps	Surface Rough C 100 hd. loss, ft/100 ft
gpm
160	2.57	0.95
170	2.73	1.06
180	2.89	1.18
190	3.05	1.30
200	3.21	1.43
210	3.37	1.56
220	3.53	1.70
230	3.69	1.85
240	3.85	2.00
260	4.17	2.32
280	4.49	2.66
300	4.81	3.0
320	5.13	3.4
380	6.09	4.7
400	6.41	5.2
420	6.74	5.6
440	7.06	6.1
460	7.38	6.7
480	7.70	7.2
500	8.02	7.8
520	8.34	8.4
540	8.66	9.0
560	8.98	9.6
580	9.30	10.2
600	9.62	10.9

 

 

Friction Losses in Pipe: Standard Weight Steel 6 " Dia.
Pipe Size, in. 6	Pipe Dia., in. 6.065 Velocity, fps	Surface Rough C 100 hd. loss, ft/100 ft
gpm
220	2.44	0.70
240	2.67	0.82
260	2.89	0.95
280	3.11	1.09
300	3.33	1.24
320	3.55	1.39
380	4.22	1.92
400	4.44	2.11
420	4.66	2.31
440	4.89	2.51
460	5.11	2.73
480	5.33	3.0
500	5.55	3.2
520	5.77	3.4
540	6.00	3.7
560	6.22	3.9
580	6.44	4.2
600	6.66	4.5
650	7.22	5.2
700	7.77	5.9
750	8.33	6.7
800	8.88	7.6
850	9.44	8.5
900	9.99	9.4
950	10.55	10.4

 

Friction Losses in Pipe: Standard Weight Steel 8 Dia.
Pipe Size, in. 8	Pipe Dia., in. 7.981 Velocity, fps	Surface Rough C 100 hd. loss, ft/100 ft
gpm
460	2.95	0.72
480	3.08	0.78
500	3.21	0.84
520	3.33	0.90
540	3.46	0.97
560	3.59	1.03
580	3.72	1.10
600	3.85	1.17
650	4.17	1.36
700	4.49	1.56
750	4.81	1.77
800	5.13	2.00
850	5.45	2.23
900	5.77	2.48
950	6.09	2.74
1,000	6.41	3.0
1,050	6.73	3.3
1,100	7.05	3.6
1,150	7.38	3.9
1,200	7.70	4.2
1,250	8.02	4.6
1,300	8.34	4.9
1,350	8.66	5.3
1,400	8.98	5.6
1,450	9.30	6.0

Related

• Schedule 40 Pipe Dimensions
• Schedule 80 Pipe Dimensions
• Flow of Air in Pipes Equation and Calculator
• Flow of Compressed Air in Pipes Equation and Calculator
• Flow of Water in Pipes Equations and Calculator
• Flow Rate of Steam in Schedule 40 Pipe Tables
• Head Loss at Pipe Entrance Equations and Calculator using the head loss coefficient and head loss of a fluid at a smooth bellmouth pipe entrance.
• Head Loss at Pipe Abrupt Exit Equations and Calculator of a fluid.
• Head loss and head loss coefficient equation and calculator of a fluid in across a screen (circular metal wire mesh) inside a pipe.
• Air Pressure Loss per Foot in Steel Pipe Table Estimated pressure drop at the given CFM of free air flow for steel pipe.
• Flow Losses for Valves and Fittings in Equivalent Feet if Pipe.
• Fluid Energy Loss in Fittings and Valves Formula, Calculator and Tables

Source

American Gas Association and the National Fire Protection Association. Used by permission