Gasket - Spiral Wound, for ANSI Class 1500, B16.5 (in)

Written by Matt Milbury on . Posted in Gasket Datasheets

Gasket - Spiral Wound (B16.20), for ANSI Class 1500, 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 for NPS 24" and larger in Class 900.
  • 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 2.50
3/4 0.81 1.00 1.56 2.75
1 1.06 1.25 1.88 3.13
1 1/4 1.31 1.56 2.38 3.50
1 1/2 1.63 1.88 2.75 3.88
2 2.06 2.31 3.38 5.63
2 1/2 2.50 2.75 3.88 6.50
3 3.10 3.63 4.75 6.88
3 1/2 4.13 5.25 7.38
4 3.85 4.63 5.88 8.25
5 4.90 5.63 7.00 10.00
6 5.80 6.75 8.25 11.13
8 7.75 8.50 10.13 13.88
10 9.69 10.50 12.25 17.13
12 11.50 12.75 14.50 20.50
14 12.63 14.25 15.75 22.75
16 14.50 16.00 18.00 25.25
18 16.75 18.25 20.50 27.75
20 18.75 20.25 22.50 29.75
24 22.75 24.25 26.75 35.50