Gasket - Spiral Wound, for ANSI Class 400, B16.5 (in)

Written by Matt Milbury. Posted in Gasket Datasheets

Gasket - Spiral Wound (B16.20), for ANSI Class 400, 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 internal ring gaskets for Class 400 flanges in NPS 1/2" through NPS 3" (use Class 600).
  • ASME B16.20 does not include gaskets with no internal ring dimensions for NPS 1/4" or 3 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 2.13
3/4 (*) 1.00 1.56 2.63
1 (*) 1.25 1.88 2.88
1 1/4 (*) 1.88 2.38 3.25
1 1/2 (*) 2.13 2.75 3.75
2 (*) 2.75 3.38 4.38
2 1/2 (*) 3.25 3.88 5.13
3 (*) 4.00 4.75 5.88
3 1/2 4.13 5.25 6.38
4 4.04 4.75 5.88 7.00
5 5.05 5.81 7.00 8.38
6 6.10 6.88 8.25 9.75
8 8.10 8.88 10.38 12.00
10 10.05 10.81 12.50 14.13
12 12.10 12.88 14.75 16.50
14 13.50 14.25 16.00 19.00
16 15.35 16.25 18.25 21.13
18 17.25 18.50 20.75 23.38
20 19.25 20.50 22.75 25.50
24 23.25 24.75 27.00 30.25