Special Thickness Classes
AMERICAN supplies pipe for the AMERICAN Earthquake Joint System as Special Thickness Class 53 or thicker.
These are special thickness classes as shown in AWWA C150 and C151.
For pressure rating and maximum depth of cover capabilities of special thickness classes, check with AMERICAN. These capabilities can be estimated by comparing metal thickness and capabilities of those of pressure classes, or calculated by using the design formulas shown in AWWA C150.
Nominal Wall Thicknesses
for Special Thickness Classes
ANSI/AWWA C150/A21.50
ANSI/AWWA C151/A21.51
| Size (in.) | Outside Diameter (in.) |
Special Thickness Classes – Wall Thickness (in.)1 | ||||||
|---|---|---|---|---|---|---|---|---|
| 53 | 54 | 55 | 56 | |||||
| 6 | 6.90 | 0.34 | 0.37 | 0.40 | 0.43 | |||
| 8 | 9.05 | 0.36 | 0.39 | 0.42 | 0.45 | |||
| 12 | 13.20 | 0.40 | 0.43 | 0.46 | 0.49 | |||
| 16 | 17.40 | 0.43 | 0.46 | 0.49 | 0.52 | |||
| 20 | 21.60 | 0.45 | 0.48 | 0.51 | 0.54 | |||
| 24 | 25.80 | 0.47 | 0.50 | 0.53 | 0.56 | |||
| 30 | 32.00 | - | - | - | 0.63 | |||
Wall Thicknesses and Weights
for Special Thickness Classes
ANSI/AWWA C151/A21.51
| Size in. | Thickness Class | Wall Thickness in. | Weight in Pounds | ||
|---|---|---|---|---|---|
| Per Foot Plain End | Per Foot Inc. Bell | Per Nominal2 Length | |||
| 6 | 53 | 0.34 | 21.4 | 22.1 | 445 |
| 6 | 54 | 0.37 | 23.2 | 23.9 | 480 |
| 6 | 55 | 0.4 | 25 | 25.7 | 515 |
| 6 | 56 | 0.43 | 26.7 | 27.4 | 550 |
| 8 | 53 | 0.36 | 30.1 | 31.1 | 625 |
| 8 | 54 | 0.39 | 32.5 | 33.5 | 675 |
| 8 | 55 | 0.42 | 34.8 | 35.8 | 720 |
| 8 | 56 | 0.45 | 37.2 | 38.3 | 770 |
| 12 | 53 | 0.4 | 49.2 | 50.8 | 1020 |
| 12 | 54 | 0.43 | 52.8 | 54.3 | 1090 |
| 12 | 55 | 0.46 | 56.3 | 57.9 | 1165 |
| 12 | 56 | 0.49 | 59.9 | 61.5 | 1235 |
| 16 | 53 | 0.43 | 70.1 | 73.3 | 1470 |
| 16 | 54 | 0.46 | 74.9 | 78.1 | 1565 |
| 16 | 55 | 0.49 | 79.7 | 82.9 | 1660 |
| 16 | 56 | 0.52 | 84.4 | 87.6 | 1755 |
| 20 | 53 | 0.45 | 91.5 | 95.5 | 1915 |
| 20 | 54 | 0.48 | 97.5 | 101.5 | 2035 |
| 20 | 55 | 0.51 | 103.4 | 107.5 | 2155 |
| 20 | 56 | 0.54 | 109.3 | 113.3 | 2270 |
| 24 | 53 | 0.47 | 114.4 | 119.2 | 2390 |
| 24 | 54 | 0.5 | 121.6 | 126.4 | 2535 |
| 24 | 55 | 0.53 | 128.8 | 133.5 | 2675 |
| 24 | 56 | 0.56 | 135.9 | 140.7 | 2820 |
| 30 | 56 | 0.63 | 190 | 198.2 | 3970 |
Note: Dimensions, lengths, weights, etc., are subject to change at our option.
1.) These are Special Thickness Classes as shown in AWA C150 and C151. They were previously designated standard thickness classes. AMERICAN can furnish any thickness in between these special thicknesses if deemed economical for major projects.