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Dims of Double Metal-Jacketed Gaskets ASME B16.20 to be used with Raised Face flanges ASME B16.5

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

General notes:

  • Dimensions are in millimeters unless otherwise indicated.
  • d1 = Inside diameter.
  • d2 = Outside diameter.
  • Dimensional dimensional tolerances diameter up to NPS 24 = + 1.58 / - 0 mm for both diameters.
  • Dimensional dimensional tolerances thickness (t) up to NPS 24 = + 0.80 / - 0 mm.
  • Thickness (t) specified by customer.
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