Spiral wound gasket dimension to suit ASME B16.5 Flanges.
Dimensions D1, D2, D3 and D4 are in mm.
| Nom Pipe Size |
Inside Diameter of Inner Ring (D1) |
Inner Diameter of Sealing Element (D2) |
Outside Diameter of Sealing Element (D3) |
Outer Diameter of Centering Ring (D4) |
|---|---|---|---|---|
| 1/2 | 14.2 | 19.1 | 31.8 | 63.5 |
| 3/4 | 20.6 | 25.4 | 39.6 | 69.9 |
| 1 | 26.9 | 31.8 | 47.8 | 79.5 |
| 1-1/4 | 33.3 | 39.6 | 60.5 | 88.9 |
| 1-1/2 | 41.4 | 47.8 | 69.9 | 98.6 |
| 2 | 52.3 | 58.7 | 85.9 | 143.0 |
| 2-1/2 | 63.5 | 69.9 | 98.6 | 165.1 |
| 3 | 78.7 | 92.2 | 120.7 | 174.8 |
| 3-1/2 | - | 104.8 | 133.4 | 187.3 |
| 4 | 97.8 | 117.6 | 149.4 | 209.6 |
| 4-1/2 | - | 134.9 | 165.1 | 231.8 |
| 5 | 124.5 | 143.0 | 177.8 | 254.0 |
| 6 | 147.3 | 171.5 | 209.6 | 282.7 |
| 8 | 196.9 | 215.9 | 257.3 | 352.6 |
| 10 | 246.1 | 266.7 | 311.2 | 435.1 |
| 12 | 292.1 | 323.9 | 368.3 | 520.7 |
| 14 | 320.8 | 362.0 | 400.1 | 577.9 |
| 16 | 374.7 | 406.4 | 457.2 | 641.4 |
| 18 | 425.5 | 463.6 | 520.7 | 704.9 |
| 20 | 476.3 | 514.4 | 571.5 | 755.7 |
| 24 | 577.9 | 616.0 | 679.5 | 901.7 |