Sizing – Spiral Wound Gaskets 2016-12-29T09:16:41+00:00

Dimensions
By Pressure Class per ASME
B16.20b-1997 Flanges (Dimensions in inches)

Nominal Pipe Size Gasket O.D.
150, 300
400, 600
900
1500, 2500
1/2 1.25 1.25
3/4 1.56 1.56
1 1.88 1.88
1 1/4 2.38 2.38
1 1/2 2.75 2.75
2 3.38 3.38
2 1/2 3.88 3.88
3 4.75 4.75
4 5.88 5.88
5 7.00 7.00
6 8.25 8.25
8 10.38 10.13
10 12.50 12.25
12 14.75 14.50
14 16.00 15.75
16 18.25 18.00
20 22.75 22.50
24 27 26.75
Nominal Pipe Size Gasket I.D.
150 300 400 600 900 1500 2500
1/2 0.75 0.75 0.75 0.75 0.75 0.75 0.75
3/4 1.00 1.00 1.00 1.00 1.00 1.00 1.00
1 1.25 1.25 1.25 1.25 1.25 1.25 1.25
1 1/4 1.88 1.88 1.88 1.88 1.56 1.56 1.56
1 1/2 2.13 2.13 2.13 2.13 1.88 1.88 1.88
2 2.75 2.75 2.75 2.75 2.31 2.31 2.31
2 1/2 3.25 3.25 3.25 3.25 2.75 2.75 2.75
3 4.00 4.00 4.00 4.00 3.75 3.63 3.63
4 5.00 4.75 4.75 4.75 4.75 4.63 4.63
5 6.13 6.13 5.81 5.81 5.81 5.63 5.63
6 7.19 7.19 6.88 6.88 6.88 6.75 6.75
8 9.19 9.19 8.88 8.88 8.75 8.50 8.50
10 11.31 11.31 10.81 10.81 10.88 10.50 10.63
12 13.38 13.38 12.88 12.88 12.75 12.75 12.50
14 14.63 14.63 14.25 14.25 14.00 14.25
16 16.63 16.63 16.25 16.25 16.25 16.00
18 18.69 18.69 18.50 18.50 18.25 18.25
20 20.69 20.69 20.50 20.50 20.50 20.25
24 24.75 24.75 24.75 24.75 24.75 24.25
Nominal Pipe Size Centering Ring O.D.
150 300 400 600 900 1500 2500
1/2 1.88 2.13 2.13 2.13 2.50 2.50 2.75
3/4 2.25 2.63 2.63 2.63 2.75 2.75 3.00
1 2.63 2.88 2.88 2.88 3.13 3.13 3.38
1 1/4 3.00 3.25 3.25 3.25 3.50 3.50 4.13
1 1/2 3.38 3.75 3.75 3.75 3.88 3.88 4.63
2 4.13 4.38 4.38 4.38 5.63 5.63 5.75
2 1/2 4.88 5.13 5.13 5.13 6.50 6.50 6.63
3 5.38 5.88 5.88 5.88 6.63 6.88 7.75
4 6.88 7.13 7.00 7.63 8.13 8.25 9.25
5 7.75 8.50 8.38 9.50 9.75 10.00 11.00
6 8.75 9.88 9.75 10.50 11.38 11.13 12.50
8 11.00 12.13 12.00 12.63 14.13 13.88 15.25
10 13.38 14.25 14.31 15.75 17.13 17.13 18.75
12 16.13 16.63 16.50 18.00 19.63 20.50 21.63
14 17.75 19.13 19.00 19.38 20.50 22.75
16 20.25 21.25 21.13 25.25 22.63 25.25
18 21.63 23.50 23.38 24.13 25.13 27.75
20 23.88 25.75 25.50 26.88 27.50 29.75
24 28.25 30.50 30.25 31.13 33.00 35.50
NOTES:
1. Nominal gasket thickness is .175″
Nominal centering ring thickness is 1/8″.
2. Gaskets within color shaded areas use
the same gasket for a given size.

Contact Us

EPM, Inc.
112 W Burke St.
Stockbridge, GA 30281
800-659-5050
sales@epm.com

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