CH PIPE SIZE SELECTION.xls

ALLOWABLE FLOW RATES FOR CLOSED SYSTEM PIPING

PIPE SIZE

FLOW RANGE

PVC (Ø MM)

B.I.(Ø MM)

B.I.(Ø IN)

(L/S)

(GPM)

15

15

1/2 IN.

0 - 0.126

0-2

20

20

3/4 IN.

0.189 - 0.252

3-4

25

25

1 IN.

0.315 - 0473

5 - 7.5

32

32

1 1/4 IN.

0.379 - 1.009

6 -16

38

38

1 1/2 IN.

1.073 - 1.514

17 -24

50

50

2 IN.

1.577 - 3.028

25 - 48

63

65

2 1/2 IN.

3.091 - 4.858

49 - 77

75

75

3 IN.

4.921- 8.833

78 - 140

100

100

4 IN

8.896 - 12.618

141 - 200

125

125

5 IN.

12.681 - 31.546

201 - 500

150

150

6 IN.

31.609 - 50.473

501 - 800

200

200

8 IN.

50.536 - 107.256

801 - 1700

250

250

10 IN.

107.319 - 157.729

1701 - 2500

300

300

12 IN.

157.792 - 227.129

2501 - 3600

350

350

14 IN.

227.192 - 264.984

3601 - 4200

400

400

16 IN.

265.047 - 347.003

4201 - 5500

450

450

18 IN.

347.066 - 441.640

5501 - 7000

500

500

20 IN.

441.703 - 567.823

7001 - 9000

600

600

24 IN.

567.886 - 630.915

9001 - 10000

NOTE :

THE ABOVE CAPACITIES ARE BASED ON MAXIMUM PRESSURE DROP OF FEET OF 100 FT. AND MAXIMUM VELOCITY OF 10 FT. PER SECOND

M PIPING

PRESSURE DROP RANGE (FT / 100 FT.) 0-4 2.5 - 4 2 -4 1.75 - 4 2-4 1.25 - 4 2-4 1.5- 4 1.25 - 4 1.5- 4 1.75 - 4 1.0 - 4 1.25 - 2.75 1.25 - 2.25 1.25 - 2.0 1.0 - 1.75 0.9 - 1.5 0.9 - 1.25 0.6 - 1.0

E DROP OF FEET OF 100 FT. SECOND