Ansi 150 Flange and 300# Full Face Flanged Gaskets

Ansi 150 Flange and 300# Full Face Flanged Gaskets

Full Faced Flange Gaskets are great for more industrial applications

These gaskets are suitable for service with ANSI 150# rated flanged connections. Also available with ANSI 300# rated flanged connections.

  • Dimensions per ANSI B16.5 standard for pipe flanges and gaskets.
  • Dimensional Tolerances (unless otherwise stated) through 1″ @ +/- 1/32″, from 1″ through 12″ @ +/- 1/16″, from 12″ through 24″ @+/- 3/32″, and over 24″ @ +/- 1/4″.
  • “New Style” Flange Gasket dimensions are listed, but “Old Style” are also available. The only difference is that “New Style” have a slightly enlarged ID on 12″ and below so as not to obstruct flow when compressed (bolt holes/circles unaffected).
  • Standard Pipe Flange Gaskets are SBR Rubber (a.k.a. Red Rubber), but Neoprene, EPDM, Buna N, Silicone, Viton (Fluoroelastomer), and other rubber compounds are also available upon request.
  • Gasket thicknesses between 1/16″ and 1/8″ are readily available in most materials; standard hardness options include 40 through 80 durometer (Shore A).
Resources Additional Specs
Full Face Flange Gaskets
125-150 LB 250-300 LB
Flange Size OD ID Holes Hole Dia. Bolt Circle Dia. OD ID Holes Hole Dia. Bolt Circle Dia.
1/2″ 3 1/2 27/32 4 5/8 2 3/8 3 3/4 27/32 4 5/8 2 5/8
3/4″ 3 7/8 1 1/16 4 5/8 2 3/4 4 5/8 1 1/16 4 3/4 3 1/4
1″ 4 1/4 1 5/16 4 5/8 3 1/8 4 7/8 1 5/16 4 3/4 3 1/2
1 1/4″ 4 5/8 1 21/32 4 5/8 3 1/2 5 1/4 1 21/32 4 3/4 3 7/8
1 1/2″ 5 1 29/32 4 5/8 3 7/8 6 1/8 1 29/32 4 3/4 4 1/2
2″ 6 2 3/8 4 3/4 4 3/4 6 1/2 2 3/8 8 7/8 5
2 1/2″ 7 2 7/8 4 3/4 5 1/2 7 1/2 2 7/8 8 7/8 5 7/8
3″ 7 1/2 3 1/2 4 3/4 6 8 1/4 3 1/2 8 7/8 6 5/8
3 1/2″ 8 1/2 4 8 3/4 7 9 4 8 7/8 7 1/4
4" 9 4 1/2 8 3/4 7 1/2 10 4 1/2 8 7/8 7 7/8
4 1/2″ 9 1/4 5 8 3/4 7 3/4 10 1/2 5 8 7/8 8 1/2
5″ 10 5 9/16 8 7/8 8 1/2 11 5 9/16 8 7/8 9 1/4
6″ 11 6 5/8 8 7/8 9 1/2 12 1/2 6 5/8 12 7/8 10 5/8
7″ 12 1/2 7 5/8 8 7/8 10 3/4 14 7 5/8 12 7/8 11 7/8
8″ 13 1/2 8 5/8 8 7/8 11 3/4 15 8 5/8 12 1 13
9″ 15 9 5/8 12 7/8 13 1/4 16 1/4 9 5/8 12 1 14
10″ 16 10 3/4 12 1 14 1/4 17 1/2 10 3/4 16 1 1/8 15 1/4
12″ 19 12 3/4 12 1 17 20 1/2 12 3/4 16 1 1/4 17 3/4
14″ 21 14 12 1 1/8 18 3/4 23 14 20 1 1/4 20 1/4
15″ 22 1/4 15 16 1 1/8 20
16″ 23 1/2 16 16 1 1/8 21 1/4 25 1/2 16 20 1 3/8 22 1/2
18″ 25 18 16 1 1/4 22 3/4 28 18 24 1 3/8 24 3/4
20″ 27 1/2 20 20 1 1/4 25 30 1/2 20 24 1 3/8 27
22″ 29 1/2 22 20 1 1/4 27 1/4 33 22 24 1 3/8 29 1/4
24″ 32 24 20 1 3/8 29 1/2 36 24 24 1 5/8 32
26″ 34 3/4 26 24 1 3/8 31 3/4 38 1/4 26 28 1 5/8 34 1/2
28″ 36 1/2 28 26 1 3/8 34 40 3/4 28 28 1 5/8 37
30″ 38 3/4 30 28 1 3/8 36 43 30 28 1 7/8 39 1/4
32″ 41 3/4 32 28 1 5/8 38 1/2 45 1/4 32 28 1 7/8 41 1/2
34″ 43 3/4 34 32 1 5/8 40 1/2 47 1/2 34 28 1 7/8 43 1/2
36″ 46 36 32 1 5/8 42 3/4 50 36 32 2 1/8 46
38″ 48 3/4 38 36 1 5/8 45 1/4 52 1/4 38 32 2 1/8 48
40″ 50 3/4 40 36 1 5/8 47 1/4 54 1/4 40 36 2 1/8 50 1/4
42″ 53 42 36 1 5/8 49 1/2 57 42 36 2 1/8 52 3/4
44″ 55 1/4 44 40 1 5/8 51 3/4 59 1/4 44 36 2 1/8 55
46″ 57 1/4 46 40 1 5/8 53 3/4 61 1/2 46 40 2 1/8 57 1/4
48″ 59 1/2 48 44 1 5/8 56 65 48 40 2 1/8 60 3/4

Additional Specs

  • Buna (Black or White)
  • EPDM (Black or White)
  • FKM Fluoroelastomer (Black or White)
  • Platinum Silicone
  • Tuf-Flex®
  • Tuf-Steel®