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Flexible Graphite Sheet Gasket

Flexible Graphite Sheet Gasket

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Flexible Graphite Sheet Gasket - I200

Flexible graphite sheet gasket is unaffected by heat over a wide range of temperatures. It exhibits low electrical resistivity and high thermal conductivity and is suitable for cryogenic temperatures, and it is made from exfoliated graphite flake which is compressed into foil by a carefully controlled calendering process. In this process, the expanded flake particles are mechanically locked together without the use of fibers, binders or other additives. Sheets of foil are then adhesive bonded and laminated to the required thickness.

Application and Service of Flexible Graphite Gasket Sheet

Flexible graphite sheet gasket has pressure-temperature sealability capabilities that are far superior to all asbestos reinforced and non-asbestos reinforced sheet products. It is resistant to chemical attack by virtually all organic and inorganic fluids with the exception of concentrated, highly oxidizing acids.

Gaskets cut from flexible graphite sheet gasket seal with low to moderate bolt loads and because of very low creep relaxation, re-torquing is rarely required. Flexible graphite conforms to irregular flange sealing surfaces and readily flows into flange irregularities enabling it to seal both smooth and coarse surface finishes.

Benefits and Properties of Flexible Graphite Gasket Sheets

Flexible graphite sheet gasket has long-term sealing characteristics up to 500 °C. And it is soft and flexible, easy to adapt to uneven flanges and surfaces. Flexible graphite gasket sheet has excellent media resistance and low permeability to gases and liquids, large dimensions up to a width of 1.5 m.

Flexible Graphite Sheet Rolls

Types of Flexible Graphite Sheet Gasket Rolls

Item I200 I205 I210 N215 N220 N225
Density (g/cm3) 1.0 - 1.2 1.0 - 1.2
1.0 - 1.2
1.0 - 1.2
1.0 - 1.2
1.0 - 1.2
Carbon content (%) ≥ 99
≥ 98
≥ 90
≥ 99.5
≥ 99.3
≥ 99
Tensile strength (Mpa) ≥ 5 ≥ 4.8 ≥ 4.5 ≥ 5 ≥ 4.8 ≥ 4.5
Compression ratio (%) ≥ 35 ≥ 35 ≥ 35 ≥ 35 ≥ 35 ≥ 35
Recovery(%) ≥ 9 ≥ 9 ≥ 9 ≥ 9 ≥ 9 ≥ 9
Sulfur content (ppm) 200 - 1200 200 - 1200 200 - 1200 <200 <200 <200
Ash content(%) <0.6 <2 <10 <0.5 <0.6 <0.8
Chlorine content (ppm) <50 <50 <50 <50 <50 <50<


The working temperature range of flexible graphite sheet gasket: In oxidizing atmosphere is from - 240 to 540℃, and when using in non-oxidizing atmosphere, the working temperaturer is form -240 to 2700℃