ENGINEERING DATA, FRICTION FLOW
FRICTION/FLOW CHART FOR SCHEDULE 40 RIGID PVC PIPE
*
E
N
G
I
N
E
R
I
N
G
D
A
T
A
3/4 in. pipe
1 in. pipe
1-1/4 in. pipe
1-1/2 in. pipe
2 in. pipe
2-1/2 in. pipe
3 in. pipe
4 in. pipe
5 in. pipe
6 in. pipe
U.S.
U.S.
Gal.per
Velocity
Loss
Velocity
Loss
Velocity
min.
Loss
Velocity
Loss
Velocity
Velocity
Loss
Velocity
Loss
Velocity
Loss
Velocity
Loss
Velocity
Loss
Gal.per
feet per
in
feet per
in
feet per
in
feet per
in
feet per
Loss
feet per
in
feet per
in
feet per
in
feet per
in
feet per
in
min.
second
feet
second
feet
second
feet
second
feet
second
in feet
second
feet
second
feet
second
feet
second
feet
second
feet
1
2
3
4
5
6
8
10
15
20
25
30
35
40
45
50
60
70
80
90
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
550
600
650
700
750
1000
.71
1.43
2.14
2.85
3.56
4.28
5.70
7.13
10.69
60.06
.40
1.44
3.05
5.19
7.85
11.01
18.75
28.34
.40
.80
1.20
1.60
2.00
2.41
3.21
4.01
6.01
8.02
.10
.35
.75
1.28
1.94
2.71
4.62
6.99
14.81
25.24
0.26
0.03
.51
.12
.77
.25
1.03
.43
1.28
.65
1.54
.92
2.05
1.56
2.57
2.36
3.85
5.00
5.13
8.52
6.41
12.88
7.70
18.06
8.98
24.03
10.26
30.77
11.54
38.27
12.83
46.51
.36
.05
.53
.10
.71
.18
.89
.27
1.07
.38
1.43
.64
1.78
.97
2.67
2.06
3.56
3.51
4.45
5.31
5.34
7.44
6.24
9.89
7.13
12.67
8.02
15.76
8.91
19.16
10.69
26.85
.50
.60
.80
.07
.09
.16
.32
.02
.38
.03
.51
.05
.22
.01
.27
.01
.36
.02
.45
.03
.67
.07
.89
.12
1.11
.18
1.34
.26
1.56
.34
1.78
.43
2.00
.54
2.23
.66
2.67
.92
3.12
1.23
3.56
1.57
4.01
1.95
4.45
2.37
5.57
3.59
6.68
5.03
7.79
6.69
8.91
8.56
10.02
10.65
11.13
12.95
1
2
3
4
5
6
8
10
15
20
25
30
35
40
45
.02
50
.03
60
.04
70
.05
80
.07
90
0.08
100
.12
125
.17
150
.23
175
.29
200
.37
225
.44
250
.53
275
.62
300
.72
325
.83
350
.94
375
1.06
400
1.19
425
1.32
450
1.46
475
1.60
500
1.91
550
2.25
600
2.61
650
2.99
700
3.40
750
5.79
1000
1.00
.24
.64
.08
1.50
.51
.96
.17
10.02
38.16
12.03
53.48
2.00
.87
1.28
2.51
1.31
1.60
3.01
1.83
1.92
3.51
2.44
2.24
4.01
3.13
2.57
4.51
3.89
2.89
5.01
4.72
3.21
6.01
6.62
3.85
7.01
8.81
4.49
8.02
11.28
5.13
.29
.44
.62
.82
1.06
1.31
1.60
2.24
2.98
3.81
4.74
5.76
8.71
12.20
.50
.03
.63
.04
.75
.06
.88
.08
1.00
.11
1.13
.13
1.25
.16
1.50
.23
1.75
.30
2.00
.39
2.25
.48
2.51
.59
3.13
.88
3.76
1.24
4.38
1.65
5.01
2.11
5.64
2.63
6.26
3.19
6.89
3.81
7.52
4.48
8.14
5.19
8.77
5.95
9.39
6.77
10.02
7.63
.48
.02
.56
.03
.64
.04
.72
.05
.80
.05
.96
.08
1.12
.10
1.28
.13
1.44
.16
1.60
.20
2.00
.30
2.41
.42
2.81
.56
3.21
.71
3.61
.89
4.01
1.08
4.41
1.29
4.81
1.51
5.21
1.75
5.61
2.01
6.01
2.28
6.41
2.57
6.81
2.88
7.22
3.20
7.62
3.54
8.02
3.89
8.82
4.64
9.62
5.46
9.02
10.02
14.03
17.06
5.77
6.41
8.02
9.62
.56
.67
.78
.89
1.00
1.11
1.39
1.67
1.95
2.23
2.51
2.78
3.06
3.34
3.62
3.90
4.18
4.45
4.73
5.01
5.29
5.57
6.12
6.68
7.24
7.79
8.35
11.13
* Friction loss of water in feet per 100 feet length of pipe. Based on Williams & Hazen formula using constant 150.
* Recommended operating flow velocities indicated by boxed areas.
617
