Corrugated Metal Gasket

CORRUGATED METAL GASKET – COVERED WITH GRAPHITE OR PTFE LAYER

Corrugated metal gasket (CMG) consists of a metal core with concentric grooves on both sides and coated with expanded graphite, PTFE layer or non-asbestos plate.

Corrugated metal gasket with soft layer on both sides is used for low pressure applications in large diameter flue gas ducts at high temperature. In addition, corrugated metal gasket is a versatile sealing element when bolt loads are low.Unlike other materials and structures, it can be very resilient.

What's more, corrugated metal gasket directly replaces spiral wound gasket and eliminates inward buckling issues while creating a seal at moderate flange stresses.

AVAILABLE COATING TYPES

There is a corrugated metal gasket coated with graphite on the white background.

Corrugated metal gasket coated with graphite

  Structure diagram of a corrugated metal gasket with PTFE layer.

Corrugated metal gasket with PTFE layer

  There is a corrugated metal gasket coated with non-asbestos plate on the white background.

Corrugated metal gasket coated with non-asbestos plate

AVAILABLE TYPES

There are many types of corrugated metal gaskets to meet different circumstance.

Sectional view of corrugated metal gasket 01 on the white background.

Corrugated metal gasket 01

  Sectional view of corrugated metal gasket 02 on the white background.

Corrugated metal gasket 02

 Sectional view of corrugated metal gasket 03 on the white background.

Corrugated metal gasket 03

  Sectional view of corrugated metal gasket 04 on the white background.

Corrugated metal gasket 04

COMMON SPECIFICATIONS

Metallic Materials Code of Germany Hardness/HB Temperature (°C) Density (g/cm3) Thickness (mm)

Carbon Steel 1.1003/1.0038 90 to 120 -60 to 500 7.85 0.5

SS304, SS304L 1.4301/1.4306 30 to 180 -250 to 550 7.93 1.0, 2.0

SS316, SS316L 1.4401/1.4404 30 to 180 -250 to 550 7.98 3.0

Facing Material Max. Temperature Pressure at Room Temp.

°C °F Min. Max.

MPa psi MPa psi

Flexible Graphite 500 932 17 2500 500 72500

Non-Asbestos Sheet 400 752 23 3300

PTFE 260 500 17 2500

FEATURES

Outstanding mechanical strength and thermal conductivity.

Capable of withstanding high temperatures.

Without any limitations on the size.

Stable and reliable sealing function

Trouble-free for handling and installation even for large size.

Chemically resistant.

Does not age or become brittle.

APPLICATIONS

Flanges.

Heat exchangers.

Valve caps.

Gas pipes.

TYPES

Centering gasket (Style CG). Utilizes an external ring which accurately centers gasket on flange face. It provide an additional radial strength to prevent the gasket blow-out and acts as a compression stop. A general purpose gasket suitable for both flat face and raised face flanges.

Centering gasket with inner ring (Style CGI). This style is similar to style CG, but it additionally consists of an inner ring. The outer ring is used for centering and the internal ring used as an additional compression limiting stop. The internal ring also serves as a barrier to protect the gasket from heat and corrosion.

Reinforced spiral wound gasket (Style R). It is a basic configuration of spiral wound gasket. The Inner and outer diameters are reinforced with several plies of metal without filler to give greater stability and better compression and sealing characteristics.

Reinforced inner ring spiral wound gasket (Style RIR). This style of the gasket, the solid inner metal ring acts as a compression stop and fills the annular space between flange bore and the inside diameter of the gasket. It is designed to prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion at flange faces.

Three centering gaskets with black inner ring on a white background.

Style CG spiral wound gasket

  A centering gasket with inner ring with yellow outer ring on a transparent background.

Style CGI spiral wound gasket

 A reinforce spiral wound gasket on a white background.

Style R spiral wound gasket

  Aspiral wound gasket with a solid metal ring on a gray background.

Style RIR spiral wound gasket

COMMON SPECIFICATIONS

Thickness : 0.125", 0.175", 0.25", 0.285"

Lower temperature Rating: -450 °F

Upper temperature Rating: 850 °F

Maximum pressure: 150 psi

PH: 0–14

Class: 150–2500

Pipe size (inch) 150, 300, 400, 600 900, 1500, 2500

ID (inch) OD (inch) ID (inch) OD (inch)

1/4 1/2 7/8 - -

1/2 3/4 1-1/4 3/4 1-1/4

3/4 1 1-9/16 1 1-9/16

1 1-1/4 1-7/8 1-1/4 1-7/8

1-1/4 1-7/8 2-3/8 1-9/16 2-3/8

1-1/2 2-1/8 2-3/4 1-7/8 2-3/4

2 2-3/4 3-3/8 2-5/16 3-3/8

2-1/2 3-1/4 3-7/8 2-3/4 3-7/8

3 4 4-3/4 3-3/4 4-3/4

3-1/2 4-1/2 5-1/4 4-1/8 5-1/4

4 5 5-7/8 4-3/4 5-7/8

4-1/2 5-1/2 6-1/2 5-5/16 6-1/2

5 6-1/8 7 5-13/16 7

6 7-3/16 8-1/4 6-7/8 8-1/4

8 9-3/16 10-3/8 8-3/4 10-1/8

10 11-5/16 12-1/2 10-7/8 12-1/4

12 13-3/8 14-3/4 12-3/4 14-1/2

14 14-5/8 16 14 15-3/4

16 16-5/8 18-1/4 16-1/4 18

18 18-11/16 20-3/4 18-1/4 20-1/2

20 20-11/16 22-3/4 20-1/2 22-1/2

24 24-3/4 27 24-3/4 26-3/4

FEATURES

Durable, easy installation and removal.

Inner ring can help shield sealing elements from erosion caused by abrasive media.

It can adjust to temperature changes, shock, and vibration, and can be used at fairly high temperatures and pressures.

Available in wide ranges of materials for various services.

Chemical resistance.

Extra-long shelf life

CLASSICAL APPLICATIONS

Chemical Industry.

Steam systems.

Onshore and offshore exploration.

Pipeline systems.

Pressure vessels.

Power generation.

Aerospace.

Oil & gas industry.

Heat exchangers.

Compressors.

Condensers.

Pumps and valves.

The spiral wound gaskets are mounted on the flange of steam system in the factory.

In steam system

  A yellow spiral wound gasket in mounted on the pipeline flange by two hands.

In pipeline flange