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Friction Flow Losses Copper Tubing 2 to 3 inches dia.

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Hydraulic & Pneumatic Design Engineering

Friction Flow Losses in Copper Tubing of Water in Sizes 2 to 3 inch diameter

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Tables are for Copper pipe with a surface roughness of C=130.

Nominal Size, in.
2
Type K Tubing
Type L Tubing
Type M Tubing
Dia. 1.959 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 1.985 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 2.009 in.
Velocity, fps
Head Loss
ft/100 ft
gpm
10
1.06
0.34
1.04
0.32
1.01
0.30
11
1.17
0.41
1.14
0.39
1.11
0.36
12
1.28
0.48
1.24
0.45
1.21
0.43
13
1.38
0.56
1.35
0.52
1.32
0.49
14
1.49
0.64
1.45
0.60
1.42
0.57
15
1.60
0.73
1.56
0.68
1.52
0.64
20
2.13
1.24
2.07
1.16
2.02
1.10
25
2.66
1.88
2.59
1.76
2.53
1.66
30
3.19
2.63
3.11
2.46
3.04
2.32
35
3.73
3.5
3.63
3.3
3.54
3.1
40
4.26
4.5
4.15
4.2
4.05
4.0
45
4.79
5.6
4.67
5.2
4.55
4.9
50
5.32
6.8
5.18
6.3
5.06
6.0
55
5.85
8.1
5.70
7.6
5.57
7.1
60
6.39
9.5
6.22
8.9
6.07
8.4
70
7.45
12.6
7.26
11.8
7.08
11.1

 

Nominal Size, in.
2.5
Type K Tubing
Type L Tubing
Type M Tubing
Dia. 2.435 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 2.465 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 2.495 in.
Velocity, fps
Head Loss
ft/100 ft
gpm
20
1.38
0.43
1.34
0.41
1.31
0.38
25
1.72
0.65
1.68
0.61
1.64
0.58
30
2.07
0.91
2.02
0.86
1.97
0.81
35
2.41
1.21
2.35
1.14
2.30
1.08
40
2.76
1.55
2.69
1.46
2.62
1.38
45
3.10
1.93
3.03
1.82
2.95
1.72
50
3.44
2.35
3.36
2.21
3.28
2.08
55
3.79
2.80
3.70
2.64
3.61
2.49
60
4.13
3.3
4.03
3.1
3.94
2.92
65
4.48
3.8
4.37
3.6
4.27
3.4
70
4.82
4.4
4.71
4.1
4.59
3.9
75
5.17
5.0
5.04
4.7
4.92
4.4
80
5.51
5.6
5.38
5.3
5.25
5.0
85
5.86
6.3
5.71
5.9
5.58
5.6
90
6.20
7.0
6.05
6.6
5.91
6.2
95
6.55
7.7
6.39
7.2
6.23
6.8
100
6.89
8.5
6.72
8.0
6.56
7.5
105
7.23
9.3
7.06
8.7
6.89
8.2
110
7.58
10.1
7.40
9.5
7.22
9.0
115
7.92
11.0
7.73
10.3
7.55
9.7
120
8.27
11.9
8.07
11.2
7.87
10.5

 

Nominal Size, in.
3
Type K Tubing
Type L Tubing
Type M Tubing
Dia. 2.907 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 2.945 in.
Velocity, fps
Head Loss
ft/100 ft
Dia. 2.981 in.
Velocity, fps
Head Loss
ft/100 ft
gpm
20
0.97
0.18
0.94
0.17
0.92
0.16
25
1.21
0.27
1.18
0.26
1.15
0.24
30
1.45
0.39
1.41
0.36
1.38
0.34
35
1.69
0.51
1.65
0.48
1.61
0.45
40
1.93
0.66
1.88
0.62
1.84
0.58
45
2.18
0.82
2.12
0.77
2.07
0.72
50
2.42
0.99
2.36
0.93
2.30
0.88
60
2.90
1.39
2.83
1.30
2.76
1.23
70
3.38
1.85
3.30
1.73
3.22
1.63
80
3.87
2.36
3.77
2.22
3.68
2.09
90
4.35
2.94
4.24
2.76
4.14
2.60
100
4.83
3.6
4.71
3.4
4.60
3.2
110
5.32
4.3
5.18
4.0
5.06
3.8
120
5.80
5.0
5.65
4.7
5.52
4.4
130
6.28
5.8
6.12
5.4
5.98
5.1
140
6.77
6.7
6.59
6.3
6.44
5.9
150
7.25
7.6
7.07
7.1
6.90
6.7
160
7.73
8.5
7.54
8.0
7.36
7.5
170
8.22
9.5
8.01
9.0
7.81
8.4
180
8.70
10.6
8.48
9.9
8.27
9.4
190
9.18
11.7
8.95
11.0
8.73
10.4
200
9.67
12.9
9.42
12.1
9.19
11.4

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Source

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

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