Gasket - Spiral Wound, for ANSI Class 2500, B16.5 (in)

Written by Matt Milbury. Posted in Gasket Datasheets

Gasket - Spiral Wound (B16.20), for ANSI Class 2500, 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 and NPS 4" and larger in Class 2500.
  • 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", 3 1/2" or 41/2".

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 0.56 0.75 1.25 2.75
3/4 0.81 1.00 1.56 3.00
1 1.06 1.25 1.88 3.38
1 1/4 1.31 1.56 2.38 4.13
1 1/2 1.63 1.88 2.75 4.63
2 2.06 2.31 3.38 5.75
2 1/2 2.50 2.75 3.88 6.63
3 3.10 3.63 4.75 7.75
4 3.85 (*) 4.63 5.88 9.25
5 4.90 (*) 5.63 7.00 11.00
6 5.80 (*) 6.75 8.25 12.50
8 7.75 (*) 8.50 10.13 15.25
10 9.69 (*) 10.63 12.25 18.75
12 11.50 (*) 12.50 14.50 21.63