Flange Gaskets
High-temperature gaskets for pipe flanges, valves, pumps and equipment in chemical, petrochemical and power industries.
Industrial Graphite Gasket
Graphite Gasketfor High-Temperature, Chemical Resistance & Pressure Sealing
Graphite gaskets manufactured from flexible graphite, with or without stainless steel reinforcement. Offering outstanding high-temperature resistance, excellent chemical inertness, low creep relaxation and reliable sealing performance for flanges, heat exchangers and demanding industrial applications.
Pure & Reinforced Graphite
High Temperature Resistant
ISO 9001 & RoHS
OEM & Bulk Orders
Graphite Gasket
High-Performance Sealing Gasket
OEM
Custom Supply
Our Graphite Gaskets
Graphite Gasket Products
Explore graphite gaskets in pure and reinforced grades for industrial sealing applications. Available as cut or molded gaskets with custom inner diameter, outer diameter and thickness to suit your flange or equipment requirements.
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Graphite Gasket
Graphite Gasket Kit With Metal Eyelets
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Graphite Cylinder Head Gasket
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Graphite Gasket
High-strength Flexible Composite Graphite Gasket
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Graphite Gasket
Graphite Wound Gasket With Inner Ring And Outer Ring
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Graphite Gasket
Reinforced Graphite Composite Gasket Sheet for Jointing
Graphite Gasket Supplier
Graphite Gaskets for High-Temperature & Chemical Sealing
Graphite gaskets are sealing components manufactured from flexible graphite, either by cutting from graphite sheet or by compression molding into the desired shape. They are widely used in petrochemical, power generation, chemical processing and other industries where high temperature, chemical resistance and low creep relaxation are critical requirements.
Graphite gaskets are available in pure (unreinforced) grade for maximum chemical resistance and conformability, and in reinforced grades with stainless steel foil (316L, 304) or wire mesh insertion to improve mechanical strength, pressure rating and blow-out resistance. Custom sizes and non-standard shapes can be produced according to drawings or samples.
We supply graphite gaskets for overseas distributors, industrial buyers, gasket fabricators, maintenance companies and OEM customers, with different purities, reinforcement types, dimensions, thicknesses and packaging available according to specification.
High Temperature Resistance
Continuous service up to +450°C in oxidizing atmospheres and +650°C in steam or inert conditions.
Excellent Chemical Inertness
Resistant to most acids, alkalis, solvents and hot oils; not recommended for strong oxidizers.
Low Creep Relaxation
Maintains bolt load over time, ensuring long-term sealing reliability on flanges.
Reinforced Options
Stainless steel foil or wire mesh reinforcement for higher pressure and blow-out resistance.
Material Advantages
Why Choose Graphite Gaskets?
Graphite gaskets combine high-temperature capability, chemical resistance, low creep relaxation and self-lubricating properties for demanding sealing applications.
01
Wide Temperature Range
Graphite gaskets can withstand temperatures from -200°C to +450°C in oxidizing environments and up to +650°C in steam or non-oxidizing atmospheres.
02
Chemical Resistance
Graphite is chemically inert to most chemicals including acids, alkalis, solvents and hot oils, except strong oxidizing agents such as nitric acid and sulfuric acid at high concentrations.
03
Low Creep Relaxation
Graphite gaskets exhibit minimal creep relaxation, maintaining gasket stress and ensuring reliable sealing over extended service life.
04
Good Compressibility & Recovery
Flexible graphite conforms to flange irregularities, providing effective sealing even on rough or pitted surfaces.
05
Reinforced Grades Available
Stainless steel foil or wire mesh insertion increases mechanical strength, pressure rating and blow-out resistance for demanding flange applications.
06
Self-Lubricating
Graphite has natural lubricity, reducing friction and wear in dynamic applications and facilitating easy gasket removal after service.
Technical Specifications
Graphite Gasket Specifications
Technical properties depend on graphite purity, density, reinforcement type and gasket dimensions. The values below are typical for high-purity flexible graphite gaskets and should be confirmed for the selected grade before ordering.
| Product | Graphite Gasket (Pure / Reinforced) |
|---|---|
| Material | Expanded natural graphite with carbon content ≥ 98% (typical ≥ 99% for high purity grades); reinforcement: 316L stainless steel foil, 304 foil, or wire mesh depending on grade |
| Color | Dark gray / Black with metallic silver when reinforced |
| Density | 0.7–1.2 g/cm³ typical (pure graphite gasket); reinforced grades may be slightly higher |
| Carbon Content | ≥ 98% typical; high-purity grades ≥ 99% |
| Ash Content | ≤ 1.0% typical; high-purity grades ≤ 0.5% |
| Chloride Content | ≤ 50 ppm typical |
| Sulfur Content | ≤ 1000 ppm typical; low-sulfur grades ≤ 300 ppm |
| Temperature Range | -200°C to +450°C in oxidizing atmospheres; up to +650°C in steam or non-oxidizing environments. Higher temperatures possible in inert or vacuum conditions depending on grade |
| Pressure Range | Pure graphite gasket: up to 40 bar typical; reinforced with 316L foil: up to 100 bar or higher depending on thickness and flange design. Confirm rated pressure for selected grade |
| Tensile Strength | ≥ 4 MPa for pure graphite gasket (typical 4–10 MPa); reinforced grades significantly higher (≥ 30 MPa with foil) |
| Compressibility | 30–40% at 35 MPa |
| Recovery | 15–25% typical |
| Chemical Resistance | Resistant to most acids, alkalis, solvents and hot oils; not recommended for strong oxidizing acids (e.g., concentrated nitric acid, hot concentrated sulfuric acid) |
| Gasket Thickness | 0.5 mm to 5.0 mm typical; common thicknesses: 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm. Custom thicknesses available |
| Gasket Dimensions | Custom inner diameter and outer diameter according to flange or equipment; typical OD range from 10 mm to 2000 mm or larger |
| Supply Form | Cut gaskets, molded gaskets, or rings; customized packaging available subject to specification |
| Compliance | ISO 9001 quality management and RoHS compliance documentation available where applicable; confirm documentation requirements before ordering |
Gasket Dimensions
Graphite Gasket Size Chart
Graphite gaskets are manufactured to custom inner diameters, outer diameters and thicknesses. The following table lists common thicknesses with typical applications. Inner and outer diameters are produced according to flange or equipment dimensions.
| Thickness | Typical OD Range | Typical Application | Grade / Reinforcement |
|---|---|---|---|
| 0.5 mm | 10–500 mm | Thin flange gaskets, heat shields, thermal insulation | Pure / 316L foil reinforced |
| 1.0 mm | 10–1000 mm | Standard flange gaskets, chemical service | Pure / 316L foil reinforced |
| 1.5 mm | 10–1500 mm | General sealing, uneven flange surfaces | Pure / 316L foil reinforced |
| 2.0 mm | 10–2000 mm | Heavy-duty gaskets, high pressure | Pure / 316L foil reinforced |
| 3.0 mm | 20–2000 mm | Thick gaskets, large flanges, reactors | Pure / Wire mesh reinforced |
| 4.0 mm | 20–2000 mm | Very thick gaskets, special equipment | Pure / Wire mesh reinforced |
| 5.0 mm | 20–2000 mm | Specialty seals, high-pressure service | Pure / Wire mesh reinforced |
* Reference thicknesses and typical outer diameter ranges are shown for procurement guidance. All dimensions are customizable. Inner diameters are produced according to flange bore or pipe size. Custom metric and inch dimensions are available subject to specification.
Industrial Applications
Graphite Gasket Applications
Graphite gaskets are used across a wide range of industries where high-temperature sealing, chemical resistance and thermal management are critical requirements.
Heat Exchangers
Gaskets for heat exchangers, condensers and boilers requiring resistance to steam, hot water and thermal cycling.
Chemical Process Equipment
Sealing for reactors, vessels and piping handling aggressive chemicals, acids and alkalis.
Power Generation
Gaskets for turbines, steam systems, exhaust systems and other power plant equipment.
Thermal Insulation
Heat shields, thermal barriers and insulation in furnaces, ovens and high-temperature processing equipment.
General Industrial Sealing
Custom-cut gaskets and seals for pumps, compressors, gearboxes and general industrial machinery.
Selection Guide
How to Choose Graphite Gaskets
The correct graphite gasket grade, reinforcement and dimensions should be selected based on temperature, pressure, chemical exposure, flange type and required compliance.
01
Purity & Grade
Select carbon content based on application sensitivity. High-purity grades (≥ 99%) are recommended for nuclear and high-corrosion applications; standard grades suffice for general industrial use.
02
Reinforcement Type
Pure graphite gasket is suitable for moderate pressure. For higher pressure and blow-out resistance, choose stainless steel foil or wire mesh reinforced grades.
03
Dimensions & Thickness
Specify inner diameter, outer diameter and thickness based on flange or equipment dimensions. Thicker gaskets compensate for rough or uneven surfaces.
04
Operating Conditions
Confirm temperature, pressure, chemical media and thermal cycling requirements to select the optimal grade and reinforcement.
Manufacturing
Controlled Production for Consistent Quality
Consistent graphite purity, density, thickness tolerance and reinforcement bonding are critical for reliable graphite gasket performance.
PROCESS / 01
Material Preparation
Flexible graphite sheet or pre-formed graphite material is prepared according to the required grade and reinforcement specification.
PROCESS / 02
Cutting / Molding
Graphite gaskets are produced by cutting from graphite sheet or by compression molding into the required shape and dimensions.
PROCESS / 03
Inspection & Testing
Finished gaskets are checked for dimensional accuracy, thickness, density, carbon content, tensile strength and surface quality.
PROCESS / 04
Packaging & Shipment
Gaskets are packaged individually or in sets with protective interleaving, ready for export.
Why Choose hongwo
A B2B Supplier for Industrial Graphite Gaskets
We focus on supplying industrial graphite gaskets to overseas distributors, equipment manufacturers, maintenance companies and industrial buyers.
Industrial Product Focus
Focused on graphite gaskets and industrial
sealing products for B2B applications.
ISO 9001 & RoHS
Quality management and RoHS compliance
documentation available where applicable.
OEM & Custom Supply
Support for customized grades, dimensions,
and packaging.
Application-Based Support
Provide your application, operating
conditions and media so we can help
identify a suitable graphite gasket grade.
Request a Quote
Tell Us Your Graphite Gasket Requirements
The more technical information you provide, the more accurately we can recommend the appropriate graphite gasket grade and prepare a quotation.
You can also send a drawing, required specifications or application details after our sales team contacts you.
FAQ
Frequently Asked Questions About Graphite Gaskets
What is a graphite gasket?
A graphite gasket is a sealing component made from
flexible graphite, either cut from graphite sheet or
compression molded. It is used for high-temperature,
high-pressure and chemically demanding flange sealing
applications.
What is the temperature range of graphite gaskets?
Graphite gaskets can be used from -200°C to +450°C
in oxidizing atmospheres and up to +650°C in steam or
non-oxidizing environments. Higher temperatures may
be possible in inert or vacuum conditions.
What is the pressure rating of graphite gaskets?
Pure graphite gaskets typically handle pressures up to
40 bar. Reinforced grades with stainless steel foil
can withstand up to 100 bar or higher depending on
thickness and flange design.
What chemicals are graphite gaskets resistant to?
Graphite is resistant to most acids, alkalis, solvents
and hot oils. It is not recommended for strong oxidizing
agents such as concentrated nitric acid or hot
concentrated sulfuric acid.
What reinforcement options are available?
Graphite gaskets can be supplied pure (unreinforced)
or reinforced with 316L stainless steel foil, 304 foil,
or wire mesh. Reinforcement improves mechanical
strength, pressure rating and blow-out resistance.
Can graphite gaskets be made to custom dimensions?
Yes. Graphite gaskets can be manufactured to any inner
diameter, outer diameter and thickness according to
your flange or equipment dimensions.
Are graphite gaskets suitable for vacuum service?
Yes. Graphite gaskets are suitable for vacuum
applications due to their low outgassing and excellent
sealing properties.
Is graphite gasket RoHS compliant?
RoHS compliance can be provided for applicable grades
and documentation requirements. Please confirm the
required RoHS documentation and grade when requesting
a quotation.
What information do you need for a quotation?
Please provide the required grade (pure or reinforced),
inner diameter, outer diameter, thickness, quantity,
operating temperature, pressure and chemical media,
and any compliance requirements.
Industrial Graphite Gasket
Get a Graphite Gasket Quote for Your Application
Tell us your grade, dimensions, operating conditions and media. Our team will review your requirements and provide a suitable product recommendation and quotation.
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