Dimensions of Double Metal-Jacketed Gaskets ASME B16.20 to be used with Raised Face flanges ASME B16.5
| Class 150 – 400 | Class 600 – 2500 | |||||||||||
| NPS | d1 | d2 | NPS | d1 | d2 | |||||||
| 150 | 300 | 400 | 600 | 900 | 1500 | 2500 | ||||||
| 1/2 | 23.8 | 44.5 | 50.8 | 50.8 | 1/2 | 23.8 | 50.8 | 60.4 | 60.4 | 66.8 | ||
| 3/4 | 31.8 | 54 | 63.5 | 63.5 | 3/4 | 31.8 | 63.5 | 66.7 | 66.7 | 73.1 | ||
| 1 | 36.5 | 63.5 | 69.9 | 69.9 | 1 | 36.5 | 69.9 | 76.2 | 76.2 | 82.5 | ||
| 1.1/4 | 46 | 73 | 79.4 | 79.4 | 1.1/4 | 46 | 79.4 | 85.8 | 85.8 | 101.6 | ||
| 1.1/2 | 52.4 | 82.6 | 92.1 | 92.1 | 1.1/2 | 52.4 | 92.1 | 95.3 | 95.3 | 114.3 | ||
| 2 | 73.2 | 101.6 | 108 | 108 | 2 | 73.2 | 108 | 139.7 | 139.7 | 143 | ||
| 2.1/2 | 85.9 | 120.6 | 127 | 127 | 2.1/2 | 85.9 | 127 | 161.9 | 161.9 | 165.1 | ||
| 3 | 107.8 | 133.4 | 146.1 | 146.1 | 3 | 107.8 | 146.1 | 165.1 | 171.5 | 193.8 | ||
| 4 | 131.8 | 171.5 | 177.8 | 174.7 | 4 | 131.8 | 190.5 | 203.2 | 206.5 | 231.9 | ||
| 5 | 152.4 | 193.8 | 212.8 | 209.5 | 5 | 152.4 | 238.2 | 244.6 | 250.9 | 276.3 | ||
| 6 | 190.5 | 219.1 | 247.7 | 244.5 | 6 | 190.5 | 263.6 | 285.8 | 279.4 | 314.5 | ||
| 8 | 238.3 | 276.3 | 304.8 | 301.7 | 8 | 238.3 | 317.5 | 355.6 | 349.3 | 384.3 | ||
| 10 | 285.8 | 336.6 | 358.8 | 355.6 | 10 | 285.8 | 396.9 | 431.8 | 431.8 | 473.2 | ||
| 12 | 342.9 | 406.4 | 419.1 | 415.9 | 12 | 342.9 | 454.1 | 495.3 | 517.6 | 546.1 | ||
| 14 | 374.7 | 447.7 | 482.6 | 479.5 | 14 | 374.7 | 489 | 517.6 | 574.7 | … | ||
| 16 | 425.5 | 511.2 | 536.6 | 533.4 | 16 | 425.5 | 562 | 571.5 | 638.2 | … | ||
| 18 | 489 | 546.1 | 593.7 | 590.6 | 18 | 489 | 609.6 | 635 | 701.8 | … | ||
| 20 | 533.4 | 603.3 | 650.9 | 644.5 | 20 | 533.4 | 679.5 | 695.5 | 752.5 | … | ||
| 24 | 641.4 | 714.4 | 771.6 | 765.3 | 24 | 641.4 | 787.4 | 835.1 | 898.6 | … | ||
| NPS | d1 | 150 | 300 | 400 | NPS | d1 | 600 | 900 | 1500 | 2500 | ||
| d2 | d2 | |||||||||||
General notes:
