Different Types of Gasket

Different Kind of Gasket

Different Kind of Gasket

  • Non-Metallic : PTFE, CNAF, Rubber
  • Metallic : Octagonal / Oval Ring Gasket
  • Composite : Spiral Wound, Metal Jacketed, Camprofile

 

Table of Content
All Type Gasket
Gasket Types
Flat Gaskets Flat Gaskets
  • Flat sheet
  • Made From Rubber, Paper, Cork
  • Used in Low Pressure Applications
  • Surface : Smooth, Flat
Spiral Wound Gaskets Spiral Wound Gaskets
  • Made By Winding a Metal Strip and Filler Material in Spiral Pattern
  • Used in High-Pressure Applications
Ring Joint Gaskets Ring Joint Gaskets
  • Metallic Gasket
  • Octagonal or Oval-shaped
  • Used in High-Pressure Applications
Rubber Gaskets Rubber Gaskets
  • Made From Silicone, Neoprene, or EPDM
  • Flexible
  • Used in Automotive, Aerospace, and HVAC
Metal Gaskets Metal Gaskets
  • Made From Metal eg. SS, Copper, Aluminium etc
  • Used in Extreme Temperatures & Pressure Application
Elastomeric Gaskets Elastomeric Gaskets
  • Made From Layers of Rubber and Metal
  • Flexible & Resilience
  • Used in Automotive Engines, Refrigeration Systems etc
Camprofile Gaskets Camprofile Gaskets
  • Non-Metallic Sealing Material
  • eg . Graphite or PTFE
  • Excellent Compression
  • Used in Fluctuating Temperatures and Pressures
Cork Gaskets Cork Gaskets
  • Made From Compressed Cork Material
  • Resistance to Oil, Gasoline, and Other Fluids Required
Graphite Gaskets Graphite Gaskets
  • Made From Graphite Sheets or Foil
  • Used From High Temperatures, Chemicals, and Pressure
PTFE Gaskets PTFE Gaskets
  • Also Known as Teflon gaskets
  • Low friction, Excellent Chemical Resistance
  • Used in Corrosive Environment

Find Metallic and Non Metallic Gasket For Piping Application, Also Check Available Materials

Different Types of Gaskets Used in Piping

Find Below Types of Gaskets in Piping to Prevent Leakage of Fluid or Gases

Metallic Gasket Types Non Metallic Gasket Types Composite
Octagonal Ring Gasket PTFE Gasket Camprofile Gaskets
Oval Ring Gasket Compressed Non-Asbestos Fibre Gasket (CNAF) Spiral Wound Gaskets
Rubber Gasket Metal Jacketed Gasket
Types of RTJ Gasket Materials

Find Different Types of Gasket Material Used to Static Seal and Prevent Leakage

  • PTFE
  • Ceramic Fiber
  • Compressed Non-Asbestos Fiber
  • Mica
  • Rubber
Gasket Specification

Gasket Specification

Advantages
Gasket Size Range
  • 1/2 inch to 24 inch
Finish
Spiral Wound Gasket Temperature
  • Up to 1202°F
Testing Facility
Flat Gasket Standards
  • ASME B16.20 / 21
Finish
Ring Joint Gasket Pressure Class
  • Class 150
  • Class 300
  • Class 600
  • Class 900
  • Class 1500
  • Class 2500
Face
Gasket Types
  • Spiral Wound Gasket
  • Flat Gasket
  • Ring Joint Type Gasket
  • Rubber Gasket
  • Graphite Gasket
  • Camprofile Gasket
Threads
Materials
  • PTFE
  • Stainless, Copper, Aluminium etc
  • Neoprene
  • Graphite

Check Full Face and Flat Ring Gasket Dimension Chart Here

Full Face Gasket Dimension Chart
Full Face gasket Dimension as Per Class 150 Nominal Bore
OD Dia of Holes Bolt Circle Diameter Number
of Bolt Holes
Inches mm Inches mm Inches mm
3  3/4 95.3 5/8 15.9 2  3/4 69.9 4 3/4
4  1/4 108.0 5/8 15.9 3  1/8 79.4 4 1
3  1/2 88.9 5/8 15.9 2  3/8 60.3 4 1/2
4  5/8 117.5 5/8 15.9 3  1/2 88.9 4 1  1/4
6 152.4 3/4 19.1 4  3/4 120.7 4 2
5 127.0 5/8 15.9 3  7/8 98.4 4 1  1/2
7 177.8 3/4 19.1 5  1/2 139.7 4 2  1/2
7  1/2 190.5 3/4 19.1 6 152.4 4 3
9 228.6 3/4 19.1 7  1/2 190.5 8 4
10 254.0 7/8 22.2 8  1/2 215.9 8 5
8  1/2 215.9 3/4 19.1 7 177.8 8 3  1/2
27 1/2 698.5 1  1/4 31.8 25 635.0 20 20
11 279.4 7/8 22.2 9  1/2 241.3 8 6
13 1/2 342.9 7/8 22.2 11 3/4 298.5 8 8
16 406.4 1 25.4 14 1/4 362.0 12 10
21 533.4 1  1/8 28.6 18 3/4 476.3 12 14
23 1/2 596.9 1 1/8 28.6 21 1/4 539.8 16 16
19 482.6 1 25.4 17 431.8 12 12
25 635.0 1  1/4 31.8 22 3/4 577.9 16 18
32 812.8 1  3/8 34.9 29 1/2 749.3 20 24
FF Gasket Dimension as Per Class 300 Nominal Bore
OD Dia of Holes Bolt Circle Dia Number of Bolt Holes
Inches mm Inches mm Inches mm
4 5/8 117.5 3/4 19.1 3 1/4 82.6 4 3/4
3 3/4 95.3 5/8 15.9 2 5/8 66.7 4 1/2
4 7/8 123.8 3/4 19.1 3 1/2 88.9 4 1
6 1/8 155.6 7/8 22.2 4 1/2 114.3 4 1  1/2
5 1/4 133.4 3/4 19.1 3 7/8 98.4 4 1  1/4
6 1/2 165.1 3/4 19.1 5 127.0 8 2
8 1/4 209.6 7/8 22.2 6 5/8 168.3 8 3
7 1/2 190.5 7/8 22.2 5 7/8 149.2 8 2  1/2
9 228.6 7/8 22.2 7 1/4 184.2 8 3  1/2
11 279.4 7/8 22.2 9 1/4 235.0 8 5
10 254.0 7/8 22.2 7 7/8 200.0 8 4
15 381.0 1  1/8 28.6 13 330.2 12 8
12 1/2 317.5 7/8 22.2 10 5/8 269.9 12 6
28 711.2 1  3/8 34.9 24 3/4 628.7 24 18
17 1/2 444.5 1  1/8 28.6 15 1/4 387.4 16 10
23 584.2 1  1/4 31.8 20 1/4 514.4 20 14
20 1/2 520.7 1  1/4 31.8 17 3/4 450.9 16 12
25 1/2 647.7 1  3/8 34.9 22 1/2 571.5 20 16
30 1/2 774.7 1  3/8 34.9 27 685.8 24 20
Full Face Gasket Dimension as Per Class 600 Nominal Bore
OD Diameter of Holes Bolt Circle Dia No. of Holes
Inches mm Inches mm Inches mm
4 5/8 117.5 3/4 19.1 3 1/4 82.6 4 3/4
5 1/4 133.4 3/4 19.1 3 7/8 98.4 4 1  1/4
3 3/4 95.3 5/8 15.9 2 5/8 66.7 4 1/2
4 7/8 123.8 3/4 19.1 3 1/2 88.9 4 1
6 1/8 155.6 7/8 22.2 4 1/2 114.3 4 1  1/2
8 1/4 209.6 7/8 22.2 6 5/8 168.3 8 3
6 1/2 165.1 3/4 19.1 5 127.0 8 2
7 1/2 190.5 7/8 22.2 5 7/8 149.2 8 2  1/2
9 228.6 1 25.4 7 1/4 184.2 8 3  1/2
13 330.2 1  1/8 28.6 10 1/2 266.7 8 5
14 355.6 1  1/8 28.6 11 1/2 292.1 12 6
20 508.0 1  3/8 34.9 17 431.8 16 10
22 558.8 1  3/8 34.9 19 1/4 489.0 20 12
27 685.8 1  5/8 41.3 23 3/4 603.3 20 16
37 939.8 2 50.8 33 838.2 24 24
Dimensions of Flat Ring Gasket
Nominal bore Flat ring gasket Dimension as Per Class 150
OD
Inches mm
3/4 2 1/4 57.2
1/2 1 7/8 47.6
1 2 5/8 66.7
1 1/2 3 3/8 85.7
1 1/4 3 76.2
2 1/2 4 7/8 123.8
2 4 1/8 104.8
3 1/2 6 3/8 161.9
3 5 3/8 136.5
5 7 3/4 196.9
4 6 7/8 174.6
8 11 279.4
6 8 3/4 222.3
12 16 1/8 409.6
16 20 1/4 514.4
10 13 3/8 339.7
14 17 3/4 450.9
20 23 7/8 606.4
18 21 5/8 549.3
24 28 1/4 717.6

Get RTJ and Flange Gasket Color Code and Selection Criteria of Gaskets

Flange Gasket Types and Its Color Code
Non Metallic Gaskets
Filler Material Verdicarb (MicaGraph) Graphite PTFE Ceramic
Abbreviation MICA F.G. PTFE CER
Max Temperature 350°C 550°C 260°C 1090°C
ASME B16.20 Colour Coding Pink stripe Grey stripe White stripe Light green
Material Wise Gasket Color Code Monel 400 304 SS 321 316L 347 Carbon Steel Hastelloy B-2 Alloy 20 [20Cb-3] Hastelloy C-276 Inconel 600 Inconel X-750 Inconel 625 Inconel 825 Nickel 200
Abbreviation MON 304 321 316L 347 CRS HAST B A-20 HAST C INC 600 INX INCO 625 IN 825 NI
Max Temperature 800°C  540°C 870°C 800°C 870°C 540°C 1000°C 760°C 1000°C 1000°C 1000°C 1000°C 1000°C 600°C
ASME B16.20 Colour Coding Orange Yellow Turquoise Green Blue Silver Brown Black Beige Gold Light Grey Gold White Red
How to Choose Right Gasket
  • Temperature and Pressure
  • Diameter and Thickness
  • Surface Finishes
  • Product Standard
  • UV and Ozone Exposure:
View Gasket Testing Methods, High Temperature Gasket Standards and Characterstics
Gasket Testing Methods
  • Precise Measurements
  • Quality Material Assurance
  • Environmental Controls
  • Performance tests
Ring Joint Gasket Characterstics
Flat, Flexible Materials Tightly Seal Spaces Between Objects
Durability Temperature Resistance
Refer to the Pressure Class Wise Spiral Wound Gasket Dimensions
Spiral Wound Gasket Dimensions in mm

Spiral Wound Gasket Dimensions in mm

Class 150
NPS 03/4 01/2 1 1.1/2 1.1/4 2 3 2.1/2 4 5
Inner Ring d1 20.6 14.2 26.9 44.5 38.1 55.6 81 66.5 106.4 131.8
Sealing Element d2 25.4 19.1 31.8 54.1 47.8 69.9 101.6 82.6 127 155.7
d3 39.6 31.8 47.8 69.9 60.5 85.9 120.7 98.6 149.4 177.8
Outer Ring d4 57.2 47.8 66.8 85.9 76.2 104.9 136.7 124 174.8 196.9
NPS 8 6 10 14 12 16 20 18 24
Inner Ring d1 215.9 157.2 268.2 349.3 317.5 400.1 500.1 449.3 603.3
Sealing Element d2 233.4 182.6 287.3 371.6 339.9 422.4 525.5 474.7 628.7
d3 263.7 209.6 317.5 406.4 374.7 463.6 577.9 527.1 685.8
Outer Ring d4 279.4 222.3 339.9 450.9 409.7 514.4 606.6 549.4 717.6
Class 300
NPS 3/4 1/2 1.1/4 1 1.1/2 2 3 2.1/2 4 5
Inner Ring d1 20.6 14.2 38.1 26.9 44.5 55.6 81 66.5 106.4 131.8
Sealing Element d2 25.4 19.1 47.8 31.8 54.1 69.9 101.6 82.6 127 155.7
d3 39.6 31.8 60.5 47.8 69.9 85.9 120.7 98.6 149.4 177.8
Outer Ring d4 66.8 54.1 82.6 73.2 95.3 111.3 149.4 130.3 181.1 215.9
NPS 8 6 12 10 14 16 20 18 24
Inner Ring d1 215.9 157.2 317.5 268.2 349.3 400.1 500.1 449.3 603.3
Sealing Element d2 233.4 182.6 339.9 287.3 371.6 422.4 525.6 474.7 628.7
d3 263.7 209.6 374.7 317.5 406.4 463.6 577.9 527.1 685.8
Outer Ring d4 308.1 251 422.4 362 485.9 539.8 654.1 596.9 774.7
Class 600
NPS 01/2 1.1/4 03/4 1.1/2 2 1 2.1/2 4 3 5
Inner Ring d1 14.2 38.1 20.6 44.5 55.6 26.9 66.5 102.6 78.7 128.3
Sealing Element d2 19.1 47.8 25.4 54.1 69.9 31.8 82.6 120.7 101.6 147.6
d3 31.8 60.5 39.6 69.9 85.9 47.8 98.6 149.4 120.7 177.8
Outer Ring d4 54.1 82.6 66.8 95.3 111.3 73.2 130.3 193.8 149.4 241.3
NPS 6 12 8 14 16 10 18 24 20
Inner Ring d1 154.9 307.3 205.7 342.9 389.9 255.3 438.2 590.6 489
Sealing Element d2 174.8 327.2 225.6 362 412.8 274.6 469.9 628.7 520.7
d3 209.6 374.7 263.7 406.4 463.6 317.5 527.1 685.8 577.9
Outer Ring d4 266.7 457.2 320.8 492.3 565.2 400.1 612.9 790.7 682.8
Cutting Methods of Gaskets
  • Flatbed Die Cutting
  • Knifeless Die Cutting
  • Kiss Cutting
  • Compression Molding
  • Laser Cutting
  • Rotary Die Cutting
  • Press Die Cutting
  • Rubber to Metal Bonding
  • Waterjet Cutting
Material Wise Uses of Metallic and Non Metallic Gaskets

Check Different Types of Gaskets and Their Uses and Select Right Material as Per Your Project Needs

Gasket Materials Uses
Rubber
  • Food processing
  • HVAC
  • Water system
PTFE
  • Chemical plants
  • Pharmaceutical
Graphite
  • Steam applications
  • Power plants
Metal
  • High-pressure pipelines
  • Oil & gas
Fiber
  • Automotive
  • Chemical processing
Installation Key Steps for Flat Gaskets
  • Inspect The Flange and Gasket
  • Align the Gasket Properly
  • Use the Correct Torque Sequence
  • Avoid Over-Tightening
  • Consider Lubrication
Dimensional Standards of Gasket
ASME B 16.20 Metallic Gaskets for pipe flanges
ASME B 16.21 Non-metallic Gaskets for pipe flanges
BS 3381 Metallic spiral wound gaskets
Types of Seal
Seal Type O-Rings Lip Seals Bonded Seals
Ideal Application
  • Pneumatics
  • Hydraulics
  • Rotating shafts
  • Axles
 High-pressure hydraulic systems
Key Materials
  • Nitrile
  • Viton
  • Silicone
  • PTFE
  • Fluoroelastomer
 Metal-elastomer combo
Spiral Wound Gaskets Components

Spiral Wound Gaskets Components

 

Temperature Ranges By Gasket Material Type
Material Type EPDM Foam Rubber Cork EPDM Rubber Insertion Rubber Styrene Butadiene (SBR) CNAF (Non-asbestos) Natural Rubber Neoprene Rubber Mica (vermiculite) Neoprene Foam Rubber
Temperature Range -40⁰C / +70⁰C -25⁰C / +135⁰C -40⁰C / +120⁰C -20⁰C / +70⁰C -50⁰C  / + 212⁰C -100⁰C / +400⁰C -60⁰C  / +220⁰C -30⁰C / + 120⁰C Excess of +1000⁰C -40⁰C / + 85⁰C
Material Type Gasket Paper Plastic Shim Nitrile Rubber Flexible Graphite Silicone Rubber Silicone Foam Rubber Viton Rubber Viton Foam Rubber PTFE
Temperature Range -20⁰C / +120⁰C -70⁰C / +130⁰C -20⁰C / + 108⁰C -240⁰C up to +1000⁰C (non-oxidised environment only). -60⁰C / +300⁰C -60⁰C / +300⁰C -25⁰C / +250⁰C -25⁰C / +200⁰C -73⁰C  / + 204⁰C
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