Gasket - Spiral Wound, for ANSI Class 900, B16.5 (in)

Written by Matt Milbury. Posted in Gasket Datasheets

Gasket - Spiral Wound (B16.20), for ANSI Class 900, B16.5 (in) Datasheet

  • 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".
  • (*) There are no Class 900 flanges in NPS 1/2" through NPS 2 1/2" (use Class 1500), or Class 2500 flanges NPS 14" and larger.
  • ASME B16.20 does not include gaskets with no internal ring dimensions for NPS 1/4" or 3 1/2" and Class 900 flanges up to NPS 2 1/2".

data gasket spiral wound 1Spiral Wound Gasket Drawing

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 (*) 0.75 1.25 2.50
3/4 (*) 1.00 1.56 2.75
1 (*) 1.25 1.88 3.13
1 1/4 (*) 1.56 2.38 3.50
1 1/2 (*) 1.88 2.75 3.88
2 (*) 2.31 3.38 5.63
2 1/2 (*) 2.75 3.88 6.50
3 3.10 3.75 4.75 6.63
3 1/2 4.13 5.25 7.50
4 4.04 4.75 5.88 8.13
5 5.05 5.81 7.00 9.75
6 6.10 6.88 8.25 11.38
8 7.75 8.75 10.13 14.13
10 9.69 10.88 12.25 17.13
12 11.50 12.75 14.50 19.63
14 12.63 14.00 15.75 20.50
16 14.75 16.25 18.00 22.63
18 16.75 18.25 20.50 25.13
20 19.00 20.50 22.50 27.50
24 23.25 24.75 26.75 33.00