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Friction Loss in Steel Pipe 1.5" to 3" inch diameter

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Friction Loss in Steel Pipe size 1.5" to 3" inch diameter

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

See also

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 1- 1/2" Dia.
Pipe Size, in.
1.5
Pipe Dia., in.
1.61
Velocity, fps
Surface Rough C
100
hd. loss, ft/100 ft
gpm
8
1.26
1.0
9
1.42
1.2
10
1.58
1.5
12
1.89
2.0
14
2.21
2.7
16
2.52
3.5
18
2.84
4.3
20
3.15
5.2
22
3.47
6.2
24
3.78
7.3
26
4.10
8.5
28
4.41
9.8
30
4.73
11.1
32
5.04
12.5
34
5.36
14.0
36
5.67
15.5
38
5.99
17.2
40
6.30
18.9
42
6.62
20.7

 

Friction Losses in Pipe: Standard Weight Steel 2" Dia.
Pipe Size, in.
2.0
Pipe Dia., in.
2.067
Velocity, fps
Surface Rough C
100
hd. loss, ft/100 ft
gpm
14
1.34
0.8
16
1.53
1.0
18
1.72
1.3
20
1.91
1.6
22
2.10
1.9
24
2.29
2.2
26
2.49
2.5
28
2.68
2.9
30
2.87
3.3
32
3.06
3.7
34
3.25
4.1
36
3.44
4.6
38
3.63
5.1
40
3.82
5.6
42
4.02
6.1
44
4.21
6.7
46
4.40
7.3
48
4.59
7.8
50
4.78
8.5

 

 

Friction Losses in Pipe: Standard Weight Steel 2-1/2 " Dia.
Pipe Size, in. 2.5
Pipe Dia., in.
2.469
Velocity, fps
Surface Rough C
100
hd. loss, ft/100 ft
gpm
26
1.74
1.06
28
1.88
1.22
30
2.01
1.39
32
2.14
1.56
34
2.28
1.75
36
2.41
1.94
38
2.55
2.15
40
2.68
2.36
42
2.81
2.58
44
2.95
2.81
46
3.08
3.1
48
3.22
3.3
50
3.35
3.6
55
3.69
4.3
60
4.02
5.0
65
4.36
5.8
70
4.69
6.6
75
5.03
7.5
80
5.36
8.5
85
5.70
9.5
90
6.03
10.6
95
6.37
11.7
100
6.70
12.8
110
7.37
15.3
120
8.04
18.0

 

Friction Losses in Pipe: Standard Weight Steel 3" Dia.
Pipe Size, in. 3.0
Pipe Dia., in.
3.068
Velocity, fps
Surface Rough C
100
hd. loss, ft/100 ft
gpm
40
1.74
0.82
42
1.82
0.90
44
1.91
0.98
46
2.00
1.06
48
2.08
1.15
50
2.17
1.24
55
2.39
1.48
60
2.60
1.74
65
2.82
2.01
70
3.04
2.31
75
3.25
2.62
80
3.47
3.0
85
3.69
3.3
90
3.91
3.7
95
4.12
4.1
100
4.34
4.5
110
4.77
5.3
120
5.21
6.3
130
5.64
7.3
140
6.08
8.3
150
6.51
9.5
160
6.94
10.7
170
7.38
11.9
180
7.81
13.2
190
8.25
14.6

Related

Source

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

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