Data shown is calculated from WIlliams
and Hazen formula: H=(3.023/C1.852)(V1.852/D1.167) using
C-150. For water at 60°F. Where H = head loss, V
= fluid velocity ft./sec., D = diameter of pipe, ft.
C = coefficient representing roughness of pipe interiour
surface.
Fittings Table: all measurements are
in equivalent feet of pipe.
Piping Table: velocity measured in feet/second,
friction loss measured in feet of water head per 100
feet of pipe.
FRICTION
LOSS IN SCHEDULE 80 FITTINGS
Nominal Pipe Size, In.
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
3"
3-1/2"
4"
5"
6"
8"
Tee, Side Outlet
3
4
5
6
7
8
12
15
16
20
22
28
32
38
90 Ell
1-1/2
1-1/2
2
2-3/4
4
4
6
8
8
10
12
14
18
22
45 Ell
3/4
3/4
1
1-3/8
1-3/4
2
2-1/2
3
4
4-1/2
5
6
8
10
Insert Coupling
—
1/2
3/4
1
1-1/4
1-1/2
2
3
3
—
4
—
6-1/4
—
Male/Female Insert Adapters
—
1
1-1/2
2
2-3/4
3-1/2
4-1/2
—
6-1/2
—
9
—
14
—
All measurements are in
equivalent feet of pipe.
FRICTION
LOSS IN SCHEDULE 80 PIPE
GALS.
PER
MIN.
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
2
2.74
6.72
1.48
1.51
4
5.48
24.2
2.97
5.45
1.79
1.54
1.00
0.39
0.73
.177
6
8.23
51.2
4.45
11.50
2.68
3.34
1.50
0.82
1.09
.375
.650
.107
8
11.00
86.9
5.94
19.60
3.57
5.69
2.00
1.39
1.45
.640
.870
.183
10
13.70
132
7.42
29.60
4.46
8.60
2.50
2.10
1.82
.960
1.09
.276
12
8.91
41.5
5.36
12.0
3.00
2.94
2.18
1.35
1.30
.387
15
11.1
62.7
6.70
22.9
3.76
4.45
2.72
2.04
1.63
.585
18
13.4
87.9
8.03
25.5
4.50
6.25
3.27
2.86
1.96
.818
20
14.8
107
8.92
30.9
5.00
7.57
3.63
3.47
2.17
.996
25
11.20
58.8
6.25
11.4
4.55
5.25
2.71
1.51
30
13.40
65.3
7.50
16.0
5.45
7.38
3.26
2.11
35
15.60
86.9
8.75
21.3
6.38
9.78
3.80
2.81
40
17.9
111
10.0
27.3
7.26
12.5
4.35
3.59
45
11.2
33.9
8.26
15.6
4.89
4.46
50
12.5
41.3
9.08
18.9
5.43
5.41
55
13.7
49.2
10.0
22.0
5.98
6.44
60
15.0
57.8
10.9
26.5
6.52
7.61
65
16.1
67.0
11.8
30.7
7.06
8.84
70
17.5
77.1
12.7
35.3
7.61
10.1
75
18.8
87.4
13.6
40.1
8.15
11.5
80
20.0
98.2
14.5
45.2
8.69
12.9
85
21.2
110
15.4
50.3
9.03
14.5
90
22.5
122
16.3
55.9
9.78
16.1
95
17.2
62.0
10.3
17.8
100
18.2
68.2
10.9
19.6
110
20.0
81.3
12.0
23.4
120
21.8
95.4
13.0
27.4
130
23.6
111
14.1
31.8
140
25.4
127
15.2
36.5
150
16.3
41.5
160
17.4
46.7
170
18.5
52.2
180
19.6
58.3
190
20.6
64.4
200
21.7
70.5
220
23.9
84.1
240
26.1
98.7
260
28.3
115
GALS.
PER
MIN.
2-1/2"
3"
3-1/2"
4"
5"
6"
8"
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
Vel
Loss
8
0.61
.077
10
0.76
.115
.485
.039
12
0.91
.161
.572
.055
15
1.14
.243
.727
.083
.54
.035
18
1.36
.340
.873
.116
.65
.056
20
1.51
.414
.970
.140
0.72
.068
.560
.037
25
1.90
.625
1.21
.212
0.90
.103
.695
.055
30
2.27
.874
1.44
.297
1.08
.145
.840
.077
0.53
.025
35
2.65
1.16
1.70
.396
1.26
.192
.973
.103
0.62
.034
40
3.03
1.49
1.94
.507
1.44
.246
1.12
.132
.710
.043
45
3.41
1.86
2.18
.629
1.63
.306
1.25
.164
.795
.054
50
3.79
2.25
2.42
.766
1.80
.372
1.40
.199
.880
.065
.620
.027
55
4.16
2.68
2.67
.912
1.99
.443
1.53
.237
.973
.078
.676
.032
60
4.54
3.16
2.92
1.07
2.17
.522
1.67
.279
1.06
.091
.740
.039
65
4.92
3.66
3.14
1.25
2.35
.604
1.81
.323
1.15
.106
.800
.044
70
5.30
4.20
3.39
1.43
2.53
.691
1.95
.371
1.23
.121
.860
.051
75
5.68
1.79
3.64
1.62
2.70
.787
2.08
.421
1.33
.138
.923
.057
80
6.05
5.36
3.88
1.83
2.89
.888
2.23
.475
1.41
.155
.980
.065
85
6.43
6.02
4.10
2.04
3.05
.992
2.34
.531
1.50
.174
1.04
.072
90
6.81
6.53
4.33
2.27
3.25
1.10
2.51
.592
1.59
.193
1.11
.080
95
7.19
7.38
4.57
2.51
3.42
1.21
2.64
.652
1.67
.213
1.20
.089
100
7.57
8.13
4.85
2.76
3.67
1.34
2.79
.719
1.76
.234
1.23
.098
110
8.33
9.68
5.33
3.29
3.97
1.60
3.07
.855
1.95
.279
1.36
.117
120
9.08
11.4
5.80
3.87
4.33
1.88
3.35
1.00
2.11
.329
1.48
.137
130
9.84
13.2
6.30
4.48
4.69
2.18
3.63
1.16
2.30
.381
1.60
.159
140
10.6
15.1
6.80
5.12
5.05
2.50
3.91
1.33
2.47
.437
1.72
.182
0.98
.047
150
11.3
17.2
7.27
5.87
5.41
2.84
4.19
1.52
2.65
.496
1.85
.207
1.05
.054
160
12.1
19.4
7.75
6.58
5.78
3.20
4.47
1.71
2.82
.559
1.97
.234
1.12
.059
170
12.9
21.7
8.20
7.37
6.14
3.58
4.75
1.91
3.00
.626
2.08
.261
1.19
.067
180
13.6
24.1
8.60
8.18
6.50
3.97
5.02
2.12
3.16
.696
2.22
.290
1.26
.074
190
14.4
26.6
9.20
9.05
6.85
4.39
5.30
2.35
3.36
.769
2.34
.321
1.33
.082
200
15.1
29.3
9.70
9.96
7.22
4.84
5.58
2.58
3.52
.846
2.46
.353
1.41
.090
220
16.7
34.9
10.6
11.9
7.94
5.78
6.14
3.08
3.88
1.01
2.71
.421
1.55
.108
240
18.2
41.0
11.6
13.9
8.66
6.77
6.70
3.62
4.23
1.18
2.96
.484
1.69
.126
260
19.7
47.5
12.6
16.2
9.38
7.85
7.26
4.19
4.58
1.37
3.20
.573
1.83
.147
280
21.2
54.5
13.5
18.6
10.1
9.02
7.82
4.79
4.94
1.57
3.45
.658
1.97
.168
300
22.7
62.0
14.4
21.1
10.8
10.2
8.38
5.45
5.29
1.79
3.69
.747
2.11
.191
320
24.2
69.9
15.5
23.7
11.5
11.5
8.94
6.16
5.64
2.01
3.94
.841
2.24
.215
340
25.8
78.2
16.3
26.6
12.3
12.9
9.50
6.91
5.99
2.26
4.19
.940
2.39
.240
360
27.2
86.9
17.4
29.5
13.0
14.3
10.0
7.66
6.35
2.51
4.43
1.05
2.64
.261
380
28.8
96.1
18.6
32.6
13.7
15.8
10.6
8.46
6.70
2.77
4.68
1.16
2.64
.295
400
30.3
106
19.4
35.9
14.4
17.4
11.2
9.31
7.05
3.05
4.93
1.27
2.81
.325
450
21.8
44.6
16.2
21.6
12.5
11.6
7.95
3.79
5.54
1.58
3.16
.404
500
23.2
54.1
18.1
26.3
14.0
14.1
8.82
4.61
6.16
1.92
3.51
.493
550
26.5
64.9
19.9
31.4
15.3
16.8
9.70
5.50
6.77
2.29
3.86
.587
600
29.1
76.1
21.7
36.9
16.7
19.7
10.6
6.44
7.39
2.69
4.22
.686
650
23.5
42.8
18.1
22.9
11.5
7.47
8.00
3.12
4.57
.799
700
25.3
48.9
19.5
26.2
12.3
8.60
8.63
3.58
4.92
.916
750
27.1
55.9
20.9
29.8
13.2
9.77
9.24
4.07
5.27
1.04
800
28.9
61.6
22.3
33.6
14.1
11.0
9.85
4.58
5.62
1.17
850
30.7
70.5
23.7
37.6
15.0
12.3
10.5
5.12
5.97
1.31
900
25.1
41.8
15.9
13.7
11.1
5.69
6.32
1.46
950
16.7
15.1
11.7
6.29
6.67
1.61
1000
17.6
16.6
12.3
6.91
7.03
1.77
1100
19.4
19.8
13.5
8.27
7.83
2.11
1200
21.1
23.3
14.8
9.73
8.43
2.48
1300
9.13
2.87
1400
9.83
3.30
1500
10.5
3.75
1600
11.2
4.23
1800
12.6
5.26
2000
14.1
6.39
2200
15.5
7.80
Velocity
measured in feet/second, friction loss measured in feet of
water head per 100 feet of pipe.
