Dims of Spiral Wound Gaskets ASME B16.20

used with Raised Face flanges ASME B16.47 series A


Spiral Wound Gasket

OTHER PRESSURE CLASSES

150
300
400
600
900


NPS

Inner Ring Sealing Element Outer Ring
d1 d2 d3 d4
26 654.1 673.1 704.9 774.7
28 704.9 723.9 755.7 831.9
30 755.7 774.7 806.5 882.7
32 806.5 825.5 860.6 939.8
34 857.3 876.3 911.4 990.6
36 908.1 927.1 968.5 1047.8
38 958.9 977.9 1019.3 1111.3
40 1009.7 1028.7 1070.1 1162.1
42 1060.5 1079.5 1124 1219.2
44 1111.3 1130.3 1178.1 1276.4
46 1162.1 1181.1 1228.9 1327.2
48 1212.9 1231.9 1279.7 1384.3
50 1263.7 1282.7 1333.5 1435.1
52 1314.5 1333.5 1384.3 1492.3
54 1358.9 1384.3 1435.1 1549.4
56 1409.7 1435.1 1485.9 1606.6
58 1460.5 1485.9 1536.7 1663.7
60 1511.3 1536.7 1587.5 1714.5


Spiral Wound Gasket

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