FLOW CHARACTERISTICS OF PROTECTO 401TM
CERAMIC EPOXY LINED DUCTILE IRON PIPE

The inside diameter of ductile iron pipe averages 8.25% larger than the inside diameter of most other pipes. The calculations for flow should include the larger inside diameters of ductile iron pipe.

The Manning "n" and the Hazen-Williams "C Factor" for Protecto 401 Ceramic Epoxy lined ductile iron pipe is equal to or better than cement mortar lined ductile pipe which is:

  1. 1. Manning "n" (open channel or partially-full sewers) = .011
  2. 2. C-Factor (full-flowing pressure pipe) = 140

The inside diameter of ductile iron pipe lined with the standard thickness (0.040 in. nominal) of Protecto 401 Ceramic Epoxy is listed below:

 

Size (in.)

Outside*
Diameter (in.)

Thickness Class 50
Inside*
Diameter (in.)

Thickness Class 52
Inside*
Diameter (in.)

6

6.90

6.32

6.20

8

9.05

8.43

8.31

10

11.10

10.44

10.32

12

13.20

12.50

12.38

14

15.30

14.56

14.44

16

17.40

16.64

16.52

18

19.50

18.72

18.60

20

21.60

20.80

20.68

24

25.80

24.96

24.84

30

32.00

31.14

30.98

36

38.30

37.36

37.16

42

44.50

43.48

43.24

48

50.80

49.70

49.42

54

57.56

56.34

56.02

 

*NOTE: Tolerances per ANSI/AWWAC151/A21.51

 

 

 

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