Dimensions Spiral Wound Gaskets ASME B16.20

used with RF flanges ASME B16.5


Cross-section Spiral Wound gasket

OTHER PRESSURE CLASSES

150
300
400
600
900
NPS Inner Ring Sealing Element Outer Ring
d1 d2 d3 d4
1/2 14.2 19.1 31.8 54.1
3/4 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
1.1/4 38.1 47.8 60.5 82.6
1.1/2 44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
2.1/2 66.5 82.6 98.6 130.3
3 81 101.6 120.7 149.4
4 106.4 127 149.4 181.1
5 131.8 155.7 177.8 215.9
6 157.2 182.6 209.6 251
8 215.9 233.4 263.7 308.1
10 268.2 287.3 317.5 362
12 317.5 339.9 374.7 422.4
14 349.3 371.6 406.4 485.9
16 400.1 422.4 463.6 539.8
18 449.3 474.7 527.1 596.9
20 500.1 525.6 577.9 654.1
24 603.3 628.7 685.8 774.7

General notes..

Marking of Spiral Wound Gaskets


Marking of Spiral Wound Gaskets

Cross Section of a Spiral Wound gasket


Cross Section of a Spiral Wound gasket