Pipe Size

Water flow capacity

Velocity meter
per second

Frictional Head
Loss Metre per
1000 meter

Number
of Joint
perLtr
of Cement

Irrigable
Area
(Acres)

Pump Requirement

Ltr. per second

Cusec (Cu-Ft/Sec)

Flow
(LPS)

Head
(M)

HP

mm

inch

Min

Max

Min

Max

Min

Max

Min

Max

20

0.50

0.06

0.18

0.002

0.006

0.25

0.75

7.5

52

300

0.24

0.12

20

2

25

0.75

0.08

0.38

0.003

0.013

0.25

1

5.75

65

250

0.46

0.23

20

2

32

1.00

0.16

0.6

0.005

0.021

0.25

1

4.2

48

200

0.6

0.38

20

2

40

1.25

0.26

0.95

0.009

0.033

0.25

1

2

36

170

1.2

0.6

20

2

50

1.50

0.42

1.2

0.014

0.042

0.25

1.25

2.3

55

125

1.6

0.8

25

2

63

2.00

0.70

4

0.024

0.141

0.25

1.5

1.7

42

110

4.7

2.35

25

2

75

2.50

1.00

5

0.035

0.176

0.25

1.5

1.3

34

90

6

3

25

3

90

3.00

1.50

7.5

0.052

0.264

0.25

1.5

1.1

27

70

9

4.5

25

5

110

4.00

2.20

12

0.077

0.423

0.25

1.5

0.8

22

50

14

7

25

5

125

4.50

5.00

15

0.176

0.529

0.5

1.5

2.2

18

39

20

10

25

7.5

140

5.00

7.00

19

0.247

0.671

0.5

1.5

2

15

28

26

13

25

7.5

160

6.00

9.00

25

0.317

0.883

0.5

1.5

1.

13

25

34

17

28

10

180

7.00

12.00

32

0.423

1.13

0.5

1.5

1.4

12

20

4

22

28

12.5

200

8.00

15.00

40

0.529

1.412

0.5

1.5

1.3

9

13

55

27

28

15

225

9.00

18.00

50

0.635

1.766

0.5

1.5

1.1

8.5

10

68

34

30

20

250

10.00

22.00

62

0.771

2.19

0.5

1.5

0.95

7.5

8

84

42

30

25

280

11.00

28.00

70

0.989

2.154

0.5

1.5

0.85

7

6

98

49

30

30

315

12.00

52.00

95

1.836

3.355

0.75

1.5

1.5

5.75

4

147

73

30

40

355

14.00

67.00

190

2.366

3.391

0.75

1.5

1.3

5

3

163

81

35

60

400

16.00

85.00

350

3.000

5.651

0.75

1.5

1.1

4.2

2

245

122

35

80

450

18.00

110.00

600

3.885

7.064

0.75

1.5

0.95

3.6

1

310

155

35

100