Ductile Iron Pipe Data

Ductile Iron Pipe Data

ANSI/AWWA C150/A21.50
and
ANSI/AWWA C151/A21.51
Standard Pressure Classes - Wall Thickness and Nominal Wall Thicknesses

Table No. 3-8
Size
in.
Outside
Diameter
in.
Pressure Class
150 200 250 300 350
Nominal Thickness in inches
4 4.8 - - - - 0.25
6 6.9 - - - - 0.25
8 9.05 - - - - 0.25
10 11.1 - - - - 0.26
12 13.2 - - - - 0.28
14 15.3 - - 0.28 0.3 0.31
16 17.4 - - 0.3 0.32 0.34
18 19.5 - - 0.31 0.34 0.36
20 21.6 - - 0.33 0.36 0.38
24 25.8 - 0.33 0.37 0.4 0.43
30 32 0.34 0.38 0.42 0.45 0.49
36 38.3 0.38 0.42 0.47 0.51 0.56
42 44.5 0.41 0.47 0.52 0.57 0.63
48 50.8 0.46 0.52 0.58 0.64 0.7
54 57.56 0.51 0.58 0.65 0.72 0.79
60 61.61 0.54 0.61 0.68 0.76 0.83
64 65.67 0.56 0.64 0.72 0.8 0.87
Notes:

Pressure classes are defined as the rated water working pressure of the pipe in psi. The thicknesses shown are adequate for the rated working pressure plus a surge allowance of 100 psi. Calculations result in net thicknesses and are based on a minimum yield strength in tension of 42,000 psi and 2.0 safety factor times the sum of working pressure and 100 psi surge allowance.

Thickness can be calculated for rated water working pressure and surges other than the above by use of equation 1 in ANSI/AWWA C150/A21.50.


Last Updated on 9/29/2003
By Nicholas Connolly