Spiral Wound ANSI Class 300 Gasket, B16.20 (in)

Spiral Wound ANSI Class 300 Gasket, B16.20 (in)

  • Dimensions to ASME B16.20 - Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed
  • Inner rings are recommended for all graphite filled gaskets, required for all PTFE filled gaskets.
  • The gasket outside diameter tolerance for NPS 1/2" through NPS 8" is ±0.03"; for NPS 10" through NPS 24", +0.06", –0.03".
  • The gasket inside diameter tolerance for NPS 1/2" through NPS 8" is ±0.016"; for NPS 10" through NPS 24", ±0.03".
  • The centering ring outside diameter tolerance is ±0.03".
  • ASME B16.20 does not include gaskets with no internal ring dimensions for NPS 1/4" or 3 1/2".
 

Pipe Size

(NPS)

Inner Ring Inside

Diameter A

Sealing Element

Inside Diameter B

Sealing Element

Outside Diameter C

Outer Ring

Outside Diameter D

1/2

0.56

0.75

1.25

2.13

3/4

0.81

1.00

1.56

2.63

1

1.06

1.25

1.88

2.88

1 1/4

1.50

1.88

2.38

3.25

1 1/2

1.75

2.13

2.75

3.75

2

2.19

2.75

3.38

4.38

2 1/2

2.62

3.25

3.88

5.13

3

3.19

4.00

4.75

5.88

3 1/2

4.50

5.25

6.50

4

4.19

5.00

5.88

7.13

5

5.19

6.13

7.00

8.50

6

6.19

7.19

8.25

9.88

8

8.50

9.19

10.38

12.13

10

10.56

11.31

12.50

14.25

12

2.50

13.38

14.75

16.63

14

13.75

14.63

16.00

19.13

16

15.75

16.63

18.25

21.25

18

17.69

18.69

20.75

23.50

20

19.69

20.69

22.75

25.75

24

23.75

24.75

27.00

30.50

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