Page 16 - Gaskets&PackingMaterialsCatalog2010

1.88 2.13 (2) 2.13 (2) 2.50 2.75
2.25 2.63 (2) 2.63 (2) 2.75 3.00
2.63 2.88 (2) 2.88 (2) 3.13 3.38
3.00 3.25 (2) 3.25 (2) 3.50 4.13
3.38 3.75 (2) 3.75 (2) 3.88 4.63
4.13 4.38 (2) 4.38 (2) 5.63 5.75
4.88 5.13 (2) 5.13 (2) 6.50 6.63
5.38 5.88 (2) 5.88 6.63 6.88 7.75
6.88 7.13 7.00 7.63 8.13 8.25 9.25
7.75 8.50 8.38 9.50 9.75 10.00 11.00
8.75 9.88 9.75 10.50 11.38 11.13 12.50
11.00 12.13 12.00 12.63 14.13 13.88 15.25
13.38 14.25 14.13 15.75 17.13 17.13 18.75
16.13 16.63 16.50 18.00 19.63 20.50 21.63
17.75 19.13 19.00 19.38 20.50 22.75 (2)
20.25 21.25 21.13 22.25 22.63 25.25 (2)
21.63 23.50 23.38 24.13 25.13 27.75 (2)
23.88 25.75 25.50 26.88 27.50 29.75 (2)
28.25 30.50 30.25 31.13 33.00 35.50 (2)
0.75 0.75 (2) 0.75 (2) 0.75 0.75
1.00 1.00 (2) 1.00 (2) 1.00 1.00
1.25 1.25 (2) 1.25 (2) 1.25 1.25
1.88 1.88 (2) 1.88 (2) 1.56 1.56
2.13 2.13 (2) 2.13 (2) 1.88 1.88
2.75 2.75 (2) 2.75 (2) 2.31 2.31
3.25 3.25 (2) 3.25 (2) 2.75 2.75
4.00 4.00 (2) 4.00 3.75 3.63 3.63
5.00 5.00 4.75 4.75 4.75 4.63 4.63(1)
6.13 6.13 5.81 5.81 5.81 5.63 5.63(1)
7.19 7.19 6.88 6.88 6.88 6.75 6.75(1)
9.19 9.19 8.88 8.88 8.75 8.50 8.50(1)
11.31 11.31 10.81 10.81 10.88 10.50 10.63(1)
13.38 13.38 12.88 12.88 12.75 12.75(1) 12.50(1)
14.63 14.63 14.25 14.25 14.00 14.25(1) (2)
16.63 16.63 16.25 16.25 16.25 16.00(1) (2)
18.69 18.69 18.50 18.50 18.25 18.25(1) (2)
20.69 20.69 20.50 20.50 20.50 20.25(1) (2)
24.75 24.75 24.75 24.75 24.75(1) 24.25(1) (2)
8
ASME B16.20 Spiral Wound Gasket Dimensions
(ASME/ANSI B16.5 Flanges)
Notes: (1) Inner ring required.
(2) There are no Class 400 flanges in NPS 1/2 through NPS 3 (use Class 600), Class 900 flanges in NPS 1/2 through NPS 2-1/2 (use Class 1500), or Class 2500 flanges
NPS 14 and larger.
(3) Telfon® filled gaskets require an inner ring.
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
18" 20.75 20.50
20" 22.75 22.50
24" 27.00 26.75
Classes
150, 300,
400, 600
Flange
Size
(NPS)
Classes
900,
1500,
2500
Outside
Diameter
of Gasket Inside Diameter of Gasket
by Class
Outside Diameter of Centering Ring
by Class
150 300 400 600 900 1500 2500 150 300 400 600 900 1500 2500