Polyethylene (PE) SDR-Pressure Rated Tube: Friction Loss Characteristics | Fluid Mechanics | Dynamics (Mechanics)
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Polyethylene Friction Loss Table: Gustavo Urbano

273233680.xls 06/11/2015

1 Metric Friction Chart

Friction Loss Characteristics

Polyethylene (PE) SDR-Pressure Rated Tube


(2306, 3206, 3306) SDR 7, 9, 11.5, 15 C=150
Sizes: 12.5mm to 75mm
Flow: 0.063 to 28.39 Liters per second
Size
13mm (1/2")
ID (cm)
1.326

19mm (3/4")
2.093

25mm (1")
2.664

32mm (1 1/4") 38mm (1 1/2")


3.505
4.089

50mm (2")
5.250

63mm (2 1/2")
6.271

75mm (3")
7.793

Flow

Flow

Velocity Head loss

Velocity Head loss

Velocity Head loss

Velocity Head loss Velocity Head loss Velocity Head loss Velocity Head loss Velocity Head loss

GPM

LPS

M/s

M/s

M/s

M/s

1
2
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60

0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.69
0.76
0.88
1.01
1.14
1.26
1.39
1.51
1.64
1.77
1.89
2.21
2.52
2.84
3.15
3.47
3.78

0.32
0.64
0.96
1.28
1.61
1.93
2.25
2.57
2.89
3.21
3.54
3.86
4.50
5.14
5.79

m/100m

1.05
3.77
7.99
13.61
20.57
28.85
38.38
49.14
61.23
74.30
88.64
104.15
138.55
177.42
220.67

m/100m

m/100m

0.18
0.26 0.11
0.09
0.37
0.96 0.23
0.30
0.55
2.04 0.34
0.62
0.73
3.47 0.45
1.07
0.92
5.23 0.56
1.63
1.10
7.35 0.68
2.27
1.28
9.77 0.79
3.02
1.47 12.52 0.90
3.86
1.65 15.56 1.01
4.80
1.83 18.90 1.13
5.85
2.02 22.57 1.24
6.96
2.20 26.51 1.35
8.19
2.56 35.27 1.58 10.89
2.93 45.15 1.81 13.95
3.30 56.17 2.03 17.36
3.66 68.28 2.26 21.09
4.03 81.46 2.49 25.16
4.40 95.69 2.72 29.55
4.76 101.77 2.94 34.29
5.13 127.32 3.17 39.32
5.50 144.66 3.40 44.68
3.95 59.45
4.52 76.14
5.08 94.70
5.64 115.10

0.06
0.13
0.20
0.26
0.32
0.39
0.46
0.52
0.59
0.65
0.72
0.78
0.91
1.04
1.17
1.30
1.43
1.57
1.70
1.83
1.96
2.28
2.61
2.94
3.26
3.59
3.92

m/100m

0.02
0.09
0.17
0.28
0.43
0.60
0.79
1.01
1.26
1.54
1.84
2.16
2.87
3.66
4.56
5.55
6.62
7.78
9.02
10.35
11.77
15.67
20.06
24.73
30.30
36.15
42.48

M/s

0.05
0.09
0.14
0.19
0.24
0.29
0.33
0.38
0.43
0.48
0.52
0.57
0.67
0.77
0.86
0.96
1.06
1.15
1.25
1.34
1.44
1.68
1.92
2.16
2.40
2.64
2.88

m/100m

0.00
0.04
0.09
0.13
0.19
0.28
0.39
0.47
0.60
0.73
0.86
1.03
1.35
1.74
2.16
2.61
3.13
3.69
4.26
4.89
5.55
7.39
9.47
11.79
14.32
17.08
20.06

M/s

0.03
0.06
0.09
0.12
0.14
0.17
0.20
0.23
0.26
0.29
0.32
0.35
0.41
0.46
0.52
0.58
0.64
0.70
0.76
0.81
0.87
1.02
1.16
1.31
1.45
1.60
1.74

m/100m

0.00
0.02
0.02
0.04
0.06
0.09
0.11
0.15
0.17
0.21
0.26
0.30
0.41
0.51
0.64
0.77
0.92
1.09
1.26
1.46
1.65
2.19
2.81
3.49
4.24
5.06
5.96

M/s

0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.22
0.24
0.28
0.33
0.37
0.41
0.45
0.48
0.53
0.57
0.61
0.71
0.81
0.92
1.02
1.12
1.24

m/100m

0.00
0.02
0.02
0.04
0.04
0.06
0.06
0.09
0.11
0.13
0.17
0.21
0.28
0.32
0.39
0.45
0.54
0.62
0.69
0.92
1.18
1.48
1.78
2.14
2.51

M/s

0.06
0.08
0.09
0.10
0.12
0.13
0.14
0.16
0.18
0.21
0.24
0.26
0.29
0.32
0.34
0.37
0.40
0.46
0.53
0.59
0.66
0.72
0.79

m/100m

0.00
0.02
0.02
0.02
0.02
0.02
0.04
0.04
0.06
0.09
0.09
0.11
0.13
0.15
0.19
0.21
0.24
0.32
0.41
0.51
0.62
0.75
0.88

273233680.xls 06/11/2015

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70
75
80
85
90
95
100
110
120
130
140
150
160
170
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225
250
275
300
325
350
375
400
425
450

Polyethylene Friction Loss Table: Gustavo Urbano

4.24
4.57
4.90
5.22
5.55
5.88

4.10
4.42
4.73
5.05
5.36
5.68
5.99
6.31
6.94
7.57
8.20
8.83
9.46
10.09
10.72
11.35
11.99
12.62
14.19
15.77
17.35
18.92
20.50
22.08
23.66
25.23
26.81
28.39

Using conversion factor psi to meters/100m=

2.1430 See below**

** 1. psi to feet x2.307 gives feet of head loss per 100ft


2. multiply product by .3048m/ft to get meters of head lost per 100 feet
3. multiply that product by 3.048 to convert loss/100ft to loss/100m

49.27
56.51
64.12
72.37
80.99
90.03

3.12
3.36
3.60
3.84
4.08
4.32
4.56
4.80
5.28
5.75

23.27
26.70
30.35
34.18
38.25
42.52
47.00
51.69
61.66
72.44

2 Metric Friction Chart

1.89
2.04
2.18
2.33
2.47
2.62
2.76
2.91
3.20
3.49
3.78
4.07
4.36
4.65
4.95
5.24
5.53
5.82

6.90
7.91
9.00
10.14
11.34
12.60
13.93
15.32
18.28
21.47
24.90
28.57
32.47
36.60
40.95
45.52
50.32
55.31

1.33
1.43
1.53
1.63
1.73
1.83
1.94
2.04
2.24
2.45
2.65
2.86
3.08
3.26
3.47
3.67
3.87
4.08
4.59
5.10
5.61

2.91
3.34
3.79
4.26
4.78
5.31
5.87
6.45
7.69
9.04
10.50
12.04
13.67
15.41
17.25
19.18
21.19
23.29
28.97
35.23
42.03

0.86
0.92
0.99
1.05
1.18
1.19
1.25
1.32
1.45
1.58
1.72
1.85
1.98
2.11
2.24
2.40
2.51
2.64
2.97
3.30
3.63
3.96
4.29
4.62
4.95
5.28
5.61
5.94

1.01
1.16
1.31
1.48
1.65
1.84
2.04
2.25
2.68
3.15
3.64
4.18
4.76
5.36
6.00
6.66
7.37
8.10
10.07
12.24
14.62
17.17
19.91
22.82
25.93
29.23
32.70
36.37

Imperial Friction chart


Standard Friction Loss Charactoristics

Flow
GPM
1
2
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
150
160
170
180
190
200
225
250
275
300

Size
IDia (C
Flow
LPS
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.69
0.76
0.88
1.01
1.14
1.26
1.39
1.51
1.64
1.77
1.89
2.21
2.52
2.84
3.15
3.47
3.78
4.10
4.42
4.73
5.05
5.36
5.68
5.99
6.31
6.94
7.57
8.20
8.83
9.46
10.09
10.72
11.35
11.99
12.62
14.19
15.77
17.35
18.92

Polyethylene (PE) SDR-Pressure Rated Tube


(2306, 3206, 3306) SDR 7, 9, 11.5, 15 C=150
13mm (1/2")
19mm (3/4")
25mm (1")
32mm (1 1/4") 38mm (1 1/2")
1.326
2.093
2.664
3.505
4.089
Velocity Head losVelocit Head losVelocit Head losVelocit Head losVelocit Head los
M/s
psi
M/s
psi
M/s
psi
FPS
psi
M/s
psi
0.32
0.49 0.18
0.12 0.11
0.04 0.21
0.01 0.15
0.00
0.64
1.76 0.37
0.45 0.23
0.14 0.42
0.04 0.31
0.02
0.96
3.73 0.55
0.95 0.34
0.29 0.64
0.08 0.47
0.04
1.28
6.35 0.73
1.62 0.45
0.50 0.85
0.13 0.62
0.06
1.61
9.60 0.92
2.44 0.56
0.76 1.07
0.20 0.78
0.09
1.93 13.46 1.10
3.43 0.68
1.06 1.28
0.28 0.94
0.13
2.25 17.91 1.28
4.56 0.79
1.41 1.49
0.37 1.09
0.18
2.57 22.93 1.47
5.84 0.90
1.80 1.71
0.47 1.25
0.22
2.89 28.57 1.65
7.26 1.01
2.24 1.92
0.59 1.41
0.28
3.21 34.67 1.83
8.82 1.13
2.73 2.14
0.72 1.57
0.34
3.54 41.36 2.02 10.53 1.24
3.25 2.35
0.86 1.72
0.40
3.86 48.60 2.20 12.37 1.35
3.82 2.56
1.01 1.88
0.48
4.50 64.65 2.56 16.46 1.58
5.08 2.99
1.34 2.20
0.63
5.14 82.79 2.93 21.07 1.81
6.51 3.42
1.71 2.51
0.81
5.79 102.97 3.30 26.21 2.03
8.10 3.85
2.13 2.83
1.01
3.66 31.86 2.26
9.84 4.28
2.59 3.15
1.22
4.03 38.01 2.49 11.74 4.71
3.09 3.46
1.46
4.40 44.65 2.72 13.79 5.14
3.63 3.78
1.72
4.76 47.49 2.94 16.00 5.57
4.21 4.09
1.99
5.13 59.41 3.17 18.35 5.99
4.83 4.41
2.28
5.50 67.50 3.40 20.85 6.42
5.49 4.73
2.59
3.95 27.74 7.49
7.31 5.50
3.45
4.52 35.53 8.56
9.36 6.29
4.42
5.08 44.19 9.64 11.54 7.08
5.50
5.64 53.71 10.71 14.14 7.87
6.68
11.78 16.87 8.65
7.97
12.85 19.82 9.44
9.36
13.92 22.99 10.23 10.86
15.00 26.37 11.01 12.46
16.07 29.92 11.80 14.16
17.14 33.77 12.59 15.95
18.21 37.79 13.37 17.85
19.28 42.01 14.16 19.84
14.95 21.93
15.74 24.12
17.31 28.77
18.88 33.80

Page 3

Imperial Friction chart


325
350
375
400
425
450
475
500
525
550
575
600

20.50
22.08
23.66
25.23
26.81
28.39
29.96
31.54
33.12
34.69
36.27
37.85

conversion factor psi to meters/100

2.3061

Page 4

Imperial Friction chart

50mm (2")
63mm (2 1/2")
75mm (3")
100mm (4")
150mm (6")
5.250
6.271
7.793
10.226
15.405
Velocit Head losVelocit Head losVelocit Head losVelocit Head losVelocit Head loss
M/s
m/100m M/s
m/100m M/s
m/100m M/s
m/100m M/s
m/100m
0.09
0.00
0.19
0.01
0.28
0.01 0.20
0.00
0.38
0.02 0.26
0.01
0.47
0.03 0.33
0.01 0.21
0.00
0.57
0.04 0.40
0.02 0.26
0.01
0.66
0.05 0.46
0.02 0.30
0.01
0.76
0.07 0.53
0.03 0.34
0.01
0.85
0.08 0.60
0.03 0.39
0.01
0.95
0.10 0.66
0.04 0.43
0.01
1.05
0.12 0.73
0.05 0.47
0.02
1.14
0.14 0.80
0.06 0.52
0.02
1.33
0.19 0.93
0.08 0.60
0.03
1.52
0.24 1.07
0.10 0.69
0.04
1.71
0.30 1.20
0.13 0.78
0.04
1.90
0.36 1.33
0.15 0.86
0.05
2.10
0.43 1.47
0.18 0.95
0.06
2.29
0.51 1.59
0.21 1.04
0.07
2.48
0.59 1.74
0.25 1.12
0.09
2.67
0.68 1.87
0.29 1.21
0.10
2.86
0.77 2.00
0.32 1.30
0.11
3.34
1.02 2.34
0.43 1.51
0.15
3.82
1.31 2.67
0.55 1.73
0.19
4.29
1.63 3.01
0.69 1.95
0.24
4.77
1.98 3.34
0.83 2.16
0.29
5.25
2.36 3.68
1.00 2.36
0.35
5.72
2.78 4.07
1.17 2.60
0.41
6.20
3.22 4.35
1.36 2.81
0.47
6.68
3.69 4.68
1.56 3.03
0.54
7.16
4.20 5.01
1.77 3.25
0.61
7.63
4.73 5.35
1.99 3.46
0.69
8.11
5.29 5.68
2.23 3.86
0.77
8.59
5.88 6.02
2.48 3.90
0.86
9.07
6.50 6.35
2.74 4.11
0.95
9.54
7.15 6.68
3.01 4.33
1.05
10.50
8.53 7.35
3.59 4.76
1.25
11.45 10.02 8.03
4.22 5.20
1.47
12.41 11.62 8.70
4.90 5.63
1.70
13.36 13.33 9.37
5.62 6.06
1.95
14.32 15.15 10.09
6.38 6.50
2.22
15.27 17.08 10.70
7.19 6.93
2.50
16.23 19.11 11.37
8.05 7.36
2.80
17.18 21.24 12.04
8.95 7.88
3.11
18.14 23.48 12.71
9.89 8.23
3.44
19.09 25.81 13.38 10.87 8.66
3.78
15.05 13.52 9.75
4.70
16.73 16.44 10.83
5.71
18.40 19.61 11.92
6.82
13.00
8.01

Page 5

Imperial Friction chart


14.08
15.17
16.25
17.33
18.42
19.50

9.29
10.65
12.10
13.64
15.26
16.97

Page 6

Natural Flow Calculator

Natural Flow Calculator (Issue 2 20-06-04)


This spreadsheet allows the user to calculate accurately the natural flow rate (LPS) for a combination of
up to 4 pipes of different diameters, for a given head (m) and pipe lengths (m).
Input data is marked in red
Frictional

1st Pipe
2nd Pipe
3rd Pipe
4th Pipe

Dia. (in)

Length (m)

Head (m)

Head (m)

1
0
0
0

600
0
0
0

20

19.91
Error
Error
Error

Pipe Size
Flow

13mm (1/2")
Flow

19mm (3/4")

Velocity

Head loss

Velocity

Head loss

25mm (1")
Velocity

Head loss

GPM

LPS

m/s

m/100m

m/s

m/100m

m/s

m/100m

7.37

0.464

2.36

42.21

1.35

10.75

0.83

3.32

The presence of the "Range" term in a cell signifies that the input data is outside the parameters of the friction ch
The presence of the "Error" term in a cell signifies that the input data is not a recognised diameter in inches.
Note : the following friction tables are for spreadsheet calculation only
Size
ID (cm)

13mm (1/2")
1.326

19mm (3/4")
2.093

25mm (1")
2.664

Flow

Flow

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

GPM

LPS

M/s

m/100m

M/s

m/100m

M/s

m/100m

1
2
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
35
40

0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.69
0.76
0.88
1.01
1.14
1.26
1.39
1.51
1.64
1.77
1.89
2.21
2.52

0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.69
0.76
0.88
1.01
1.14
1.26
1.39
1.51
1.64
1.77
1.89
2.21
2.52
2.84

0.32
0.64
0.96
1.28
1.61
1.93
2.25
2.57
2.89
3.21
3.54
3.86
4.50
5.14
5.79

1.05
3.77
7.99
13.61
20.57
28.85
38.38
49.14
61.23
74.30
88.64
104.15
138.55
177.42
220.67

Page 7

0.18
0.26
0.37
0.96
0.55
2.04
0.73
3.47
0.92
5.23
1.10
7.35
1.28
9.77
1.47 12.52
1.65 15.56
1.83 18.90
2.02 22.57
2.20 26.51
2.56 35.27
2.93 45.15
3.30 56.17
3.66 68.28
4.03 81.46
4.40 95.69
4.76 101.77
5.13 127.32
5.50 144.66

0.11
0.23
0.34
0.45
0.56
0.68
0.79
0.90
1.01
1.13
1.24
1.35
1.58
1.81
2.03
2.26
2.49
2.72
2.94
3.17
3.40
3.95
4.52

0.09
0.30
0.62
1.07
1.63
2.27
3.02
3.86
4.80
5.85
6.96
8.19
10.89
13.95
17.36
21.09
25.16
29.55
34.29
39.32
44.68
59.45
76.14

Natural Flow Calculator

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250
275
300
325
350
375
400
425
450

2.84
3.15
3.47
3.78
4.10
4.42
4.73
5.05
5.36
5.68
5.99
6.31
6.94
7.57
8.20
8.83
9.46
10.09
10.72
11.35
11.99
12.62
14.19
15.77
17.35
18.92
20.50
22.08
23.66
25.23
26.81
28.39

5.08 94.70
5.64 115.10

3.15
3.47
3.78
4.10
4.42
4.73
5.05
5.36
5.68
5.99
6.31
6.94
7.57
8.20
8.83
9.46
10.09
10.72
11.35
11.99
12.62
14.19
15.77
17.35
18.92
20.50
22.08
23.66
25.23
26.81
28.39

Size
ID (cm)

13mm (1/2")
1.326

19mm (3/4")
2.093

25mm (1")
2.664

Flow

Flow

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

GPM

LPS

M/s

m/100m

M/s

m/100m

M/s

m/100m

1
2
3
4
5
6
7
8

0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50

0.32
0.64
0.96
1.28
1.61
1.93
2.25
2.57
2.89

1.05
3.77
7.99
13.61
20.57
28.85
38.38
49.14
61.23

Page 8

0.18
0.37
0.55
0.73
0.92
1.10
1.28
1.47
1.65

0.26
0.96
2.04
3.47
5.23
7.35
9.77
12.52
15.56

0.11
0.23
0.34
0.45
0.56
0.68
0.79
0.90
1.01

0.09
0.30
0.62
1.07
1.63
2.27
3.02
3.86
4.80

Natural Flow Calculator

9
10
11
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
150
160
170
180
190
200
225
250
275
300
325
350
375
400
425

0.57
0.63
0.69
0.76
0.88
1.01
1.14
1.26
1.39
1.51
1.64
1.77
1.89
2.21
2.52
2.84
3.15
3.47
3.78
4.10
4.42
4.73
5.05
5.36
5.68
5.99
6.31
6.94
7.57
8.20
8.83
9.46
10.09
10.72
11.35
11.99
12.62
14.19
15.77
17.35
18.92
20.50
22.08
23.66
25.23
26.81

3.21
3.54
3.86
4.50
5.14
5.79

74.30
88.64
104.15
138.55
177.42
220.67

Page 9

1.83 18.90
2.02 22.57
2.20 26.51
2.56 35.27
2.93 45.15
3.30 56.17
3.66 68.28
4.03 81.46
4.40 95.69
4.76 101.77
5.13 127.32
5.50 144.66

1.13
5.85
1.24
6.96
1.35
8.19
1.58 10.89
1.81 13.95
2.03 17.36
2.26 21.09
2.49 25.16
2.72 29.55
2.94 34.29
3.17 39.32
3.40 44.68
3.95 59.45
4.52 76.14
5.08 94.70
5.64 115.10

Natural Flow Calculator

Page 10

Natural Flow Calculator

S) for a combination of

Total Fric.
Head (m)

19.91

32mm (1 1/4")
Velocity

Head loss

m/s

0.48

38mm (1 1/2")
Velocity

Head loss

m/100m

m/s

0.87

0.35

50mm (2")
Velocity

Head loss

m/100m

m/s

0.42

0.21

63mm (2 1/2")

75mm (3")

Velocity

Head loss

Velocity

m/100m

m/s

m/100m

m/s

0.12

0.15

0.05

0.10

the parameters of the friction chart.


ognised diameter in inches.

32mm (1 1/4")
3.505

38mm (1 1/2")
4.089

50mm (2")
5.250

63mm (2 1/2")
6.271

75mm (3")
7.793

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

Velocity

M/s

m/100m

M/s

m/100m

M/s

m/100m

M/s

m/100m

M/s

0.06
0.13
0.20
0.26
0.32
0.39
0.46
0.52
0.59
0.65
0.72
0.78
0.91
1.04
1.17
1.30
1.43
1.57
1.70
1.83
1.96
2.28
2.61

0.02
0.09
0.17
0.28
0.43
0.60
0.79
1.01
1.26
1.54
1.84
2.16
2.87
3.66
4.56
5.55
6.62
7.78
9.02
10.35
11.77
15.67
20.06

0.05
0.09
0.14
0.19
0.24
0.29
0.33
0.38
0.43
0.48
0.52
0.57
0.67
0.77
0.86
0.96
1.06
1.15
1.25
1.34
1.44
1.68
1.92

0.00
0.04
0.09
0.13
0.19
0.28
0.39
0.47
0.60
0.73
0.86
1.03
1.35
1.74
2.16
2.61
3.13
3.69
4.26
4.89
5.55
7.39
9.47

0.03
0.06
0.09
0.12
0.14
0.17
0.20
0.23
0.26
0.29
0.32
0.35
0.41
0.46
0.52
0.58
0.64
0.70
0.76
0.81
0.87
1.02
1.16

Page 11

0.00
0.02
0.02
0.04
0.06
0.09
0.11
0.15
0.17
0.21
0.26
0.30
0.41
0.51
0.64
0.77
0.92
1.09
1.26
1.46
1.65
2.19
2.81

0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.22
0.24
0.28
0.33
0.37
0.41
0.45
0.48
0.53
0.57
0.61
0.71
0.81

0.00
0.02
0.02
0.04
0.04
0.06
0.06
0.09
0.11
0.13
0.17
0.21
0.28
0.32
0.39
0.45
0.54
0.62
0.69
0.92
1.18

0.06
0.08
0.09
0.10
0.12
0.13
0.14
0.16
0.18
0.21
0.24
0.26
0.29
0.32
0.34
0.37
0.40
0.46
0.53

Natural Flow Calculator

2.94
3.26
3.59
3.92
4.24
4.57
4.90
5.22
5.55
5.88

24.73
30.30
36.15
42.48
49.27
56.51
64.12
72.37
80.99
90.03

32mm (1 1/4")
3.505

2.16
2.40
2.64
2.88
3.12
3.36
3.60
3.84
4.08
4.32
4.56
4.80
5.28
5.75

11.79
14.32
17.08
20.06
23.27
26.70
30.35
34.18
38.25
42.52
47.00
51.69
61.66
72.44

1.31
1.45
1.60
1.74
1.89
2.04
2.18
2.33
2.47
2.62
2.76
2.91
3.20
3.49
3.78
4.07
4.36
4.65
4.95
5.24
5.53
5.82

38mm (1 1/2")
4.089

3.49
4.24
5.06
5.96
6.90
7.91
9.00
10.14
11.34
12.60
13.93
15.32
18.28
21.47
24.90
28.57
32.47
36.60
40.95
45.52
50.32
55.31

50mm (2")
5.250

0.92
1.02
1.12
1.24
1.33
1.43
1.53
1.63
1.73
1.83
1.94
2.04
2.24
2.45
2.65
2.86
3.08
3.26
3.47
3.67
3.87
4.08
4.59
5.10
5.61

1.48
1.78
2.14
2.51
2.91
3.34
3.79
4.26
4.78
5.31
5.87
6.45
7.69
9.04
10.50
12.04
13.67
15.41
17.25
19.18
21.19
23.29
28.97
35.23
42.03

0.59
0.66
0.72
0.79
0.86
0.92
0.99
1.05
1.18
1.19
1.25
1.32
1.45
1.58
1.72
1.85
1.98
2.11
2.24
2.40
2.51
2.64
2.97
3.30
3.63
3.96
4.29
4.62
4.95
5.28
5.61
5.94

63mm (2 1/2")
6.271

75mm (3")
7.793

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

Velocity

Head loss

Velocity

M/s

m/100m

M/s

m/100m

M/s

m/100m

M/s

m/100m

M/s

0.06
0.13
0.20
0.26
0.32
0.39
0.46
0.52
0.59

0.02
0.09
0.17
0.28
0.43
0.60
0.79
1.01
1.26

0.05
0.09
0.14
0.19
0.24
0.29
0.33
0.38
0.43

0.00
0.04
0.09
0.13
0.19
0.28
0.39
0.47
0.60

0.03
0.06
0.09
0.12
0.14
0.17
0.20
0.23
0.26

Page 12

0.00
0.02
0.02
0.04
0.06
0.09
0.11
0.15
0.17

0.06
0.08
0.10
0.12
0.14
0.16
0.18

0.00
0.02
0.02
0.04
0.04
0.06
0.06

0.06
0.08
0.09
0.10
0.12

Natural Flow Calculator

0.65
0.72
0.78
0.91
1.04
1.17
1.30
1.43
1.57
1.70
1.83
1.96
2.28
2.61
2.94
3.26
3.59
3.92
4.24
4.57
4.90
5.22
5.55
5.88

1.54
1.84
2.16
2.87
3.66
4.56
5.55
6.62
7.78
9.02
10.35
11.77
15.67
20.06
24.73
30.30
36.15
42.48
49.27
56.51
64.12
72.37
80.99
90.03

0.48
0.52
0.57
0.67
0.77
0.86
0.96
1.06
1.15
1.25
1.34
1.44
1.68
1.92
2.16
2.40
2.64
2.88
3.12
3.36
3.60
3.84
4.08
4.32
4.56
4.80
5.28
5.75

0.73
0.86
1.03
1.35
1.74
2.16
2.61
3.13
3.69
4.26
4.89
5.55
7.39
9.47
11.79
14.32
17.08
20.06
23.27
26.70
30.35
34.18
38.25
42.52
47.00
51.69
61.66
72.44

0.29
0.32
0.35
0.41
0.46
0.52
0.58
0.64
0.70
0.76
0.81
0.87
1.02
1.16
1.31
1.45
1.60
1.74
1.89
2.04
2.18
2.33
2.47
2.62
2.76
2.91
3.20
3.49
3.78
4.07
4.36
4.65
4.95
5.24
5.53
5.82

0.21
0.26
0.30
0.41
0.51
0.64
0.77
0.92
1.09
1.26
1.46
1.65
2.19
2.81
3.49
4.24
5.06
5.96
6.90
7.91
9.00
10.14
11.34
12.60
13.93
15.32
18.28
21.47
24.90
28.57
32.47
36.60
40.95
45.52
50.32
55.31

Page 13

0.20
0.22
0.24
0.28
0.33
0.37
0.41
0.45
0.48
0.53
0.57
0.61
0.71
0.81
0.92
1.02
1.12
1.24
1.33
1.43
1.53
1.63
1.73
1.83
1.94
2.04
2.24
2.45
2.65
2.86
3.08
3.26
3.47
3.67
3.87
4.08
4.59
5.10
5.61

0.09
0.11
0.13
0.17
0.21
0.28
0.32
0.39
0.45
0.54
0.62
0.69
0.92
1.18
1.48
1.78
2.14
2.51
2.91
3.34
3.79
4.26
4.78
5.31
5.87
6.45
7.69
9.04
10.50
12.04
13.67
15.41
17.25
19.18
21.19
23.29
28.97
35.23
42.03

0.13
0.14
0.16
0.18
0.21
0.24
0.26
0.29
0.32
0.34
0.37
0.40
0.46
0.53
0.59
0.66
0.72
0.79
0.86
0.92
0.99
1.05
1.18
1.19
1.25
1.32
1.45
1.58
1.72
1.85
1.98
2.11
2.24
2.40
2.51
2.64
2.97
3.30
3.63
3.96
4.29
4.62
4.95
5.28
5.61
5.94

Natural Flow Calculator

Page 14

Natural Flow Calculator

75mm (3")
Head loss
m/100m

0.02

75mm (3")
7.793
Head loss
m/100m

0.00
0.02
0.02
0.02
0.02
0.02
0.04
0.04
0.06
0.09
0.09
0.11
0.13
0.15
0.19
0.21
0.24
0.32
0.41

Page 15

Natural Flow Calculator

0.51
0.62
0.75
0.88
1.01
1.16
1.31
1.48
1.65
1.84
2.04
2.25
2.68
3.15
3.64
4.18
4.76
5.36
6.00
6.66
7.37
8.10
10.07
12.24
14.62
17.17
19.91
22.82
25.93
29.23
32.70
36.37
75mm (3")
7.793
Head loss
m/100m

0.00
0.02
0.02
0.02
0.02

Page 16

Natural Flow Calculator

0.02
0.04
0.04
0.06
0.09
0.09
0.11
0.13
0.15
0.19
0.21
0.24
0.32
0.41
0.51
0.62
0.75
0.88
1.01
1.16
1.31
1.48
1.65
1.84
2.04
2.25
2.68
3.15
3.64
4.18
4.76
5.36
6.00
6.66
7.37
8.10
10.07
12.24
14.62
17.17
19.91
22.82
25.93
29.23
32.70
36.37

Page 17

Natural Flow Calculator

Page 18