Pipe - DI, ANSI, Pressure Class (in)
- This is for the nominal thickness for standard pressure classes of ductile iron pipe.
- Per ANSI/AWWA C150/A21.50 the thicknesses above include the 0.08" service allowance and the casting tolerance listed below by size ranges.
- Dimensions and weights of thickness classes are found at Pipe - DI, ANSI, Thickness Class.
- Pressure classes are defined as the rated water pressure of the pipe in psi.
- The thicknesses shown are adequate for the rated water working pressure plus a surge allowance of 100 psi. Calculations are based on a minimum yield strength of 42,000 and a 2.0 safety factor times the sum of the working pressure and 100 psi surge allowance.
- * Calculated thickness for these sizes and pressure ratings are less than those shown below. Presently these are the lowest nominal thicknesses available in these sizes.
Pipe - DI, ANSI, Pressure Class (in) | |||||||
---|---|---|---|---|---|---|---|
Pipe Size (NPS) | Outside Diameter (in) | Pressure Class - Nominal Thickness (in) | Casting Tolerances
(in) | ||||
150 | 200 | 250 | 300 | 350 | |||
3 | 3 31/32 | - | - | - | - | 0.25 * | 0.05 |
4 | 4 13/16 | - | - | - | - | 0.25 * | 0.05 |
6 | 6 29/32 | - | - | - | - | 0.25 * | 0.05 |
8 | 9 1/16 | - | - | - | - | 0.25 * | 0.05 |
10 | 11 3/32 | - | - | - | - | 0.28 | 0.06 |
12 | 13 3/16 | - | - | - | - | 0.28 | 0.06 |
14 | 15 5/16 | - | - | 0.28 | 0.30 | 0.31 | 0.07 |
16 | 17 13/32 | - | - | 0.30 | 0.32 | 0.34 | 0.07 |
18 | 19 1/2 | - | - | 0.31 | 0.34 | 0.36 | 0.07 |
20 | 21 19/32 | - | - | 0.33 | 0.36 | 0.38 | 0.07 |
24 | 25 13/16 | - | 0.33 | 0.37 | 0.40 | 0.43 | 0.07 |
30 | 32 | 0.34 | 0.38 | 0.42 | 0.45 | 0.49 | 0.07 |
36 | 38 5/16 | 0.38 | 0.42 | 0.47 | 0.51 | 0.56 | 0.07 |
42 | 44 1/2 | 0.41 | 0.47 | 0.52 | 0.57 | 0.63 | 0.07 |
48 | 50 13/16 | 0.46 | 0.52 | 0.58 | 0.64 | 0.70 | 0.08 |
54 | 57 9/16 | 0.51 | 0.58 | 0.65 | 0.72 | 0.79 | 0.09 |
60 | 61 5/8 | 0.54 | 0.61 | 0.68 | 0.76 | 0.83 | 0.09 |
64 | 65 21/32 | 0.56 | 0.64 | 0.72 | 0.80 | 0.87 | 0.09 |