Flange Gaskets
High-temperature gaskets for pipe flanges, valves, pumps and equipment in chemical, petrochemical and power industries.
Industrial Graphite Sheet
Graphite Sheetfor High-Temperature Sealing, Gaskets & Thermal Management
Flexible graphite sheet manufactured from expanded natural graphite, with or without reinforcement. Offers outstanding high-temperature resistance, excellent chemical inertness, low creep relaxation and superior sealing performance for gaskets, heat exchangers and demanding industrial applications.
Pure & Reinforced Grades
High Temperature Resistant
ISO 9001 & RoHS
OEM & Bulk Orders
Graphite Sheet
Flexible Graphite Sealing Sheet
OEM
Custom Supply
Our Graphite Sheet
Graphite Sheet Products
Explore flexible graphite sheet in pure and reinforced grades for industrial gaskets, seals, thermal management and high-temperature applications. Available in various thicknesses, sheet sizes and reinforcement options.
-
Graphite Sheet
Corrugated Flexible Graphite Tape
-
Graphite Sheet
Graphite Sheet with Wire Mesh
-
Graphite Sheet
Reinforced Graphite Composite Sheet
-
Graphite Sheet
Expanded Graphite Sheet
Graphite Sheet Supplier
Graphite Sheet for High-Temperature Industrial Sealing
Graphite sheet, also known as flexible graphite sheet or expanded graphite sheet, is manufactured from high purity natural graphite flakes that are expanded and compressed into sheet form. It is widely used for high-temperature gaskets, seals, thermal insulation, heat shields and other demanding applications where conventional materials fail.
The sheet exhibits excellent resistance to high temperatures, most chemicals, and radiation, with low creep relaxation and good compressibility. Pure graphite sheet is available, as well as reinforced grades with stainless steel foil (316L, 304, 316) or wire mesh insertion for added mechanical strength and blow-out resistance.
We supply graphite sheet for overseas distributors, industrial buyers, gasket manufacturers, maintenance companies and OEM customers, with different purities, thicknesses, reinforcement types, sheet sizes and custom cutting 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 Sheet?
Graphite sheet combines high-temperature capability, chemical resistance, low creep relaxation and self-lubricating properties for demanding sealing applications.
01
Wide Temperature Range
Graphite sheet 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 sheet exhibits 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 Sheet Specifications
Technical properties depend on graphite purity, density, thickness and reinforcement type. The values below are typical for high-purity flexible graphite sheet and should be confirmed for the selected grade before ordering.
| Product | Flexible Graphite Sheet (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 sheet); 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 sheet: 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 sheet (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) |
| Sheet Thickness | 0.2 mm to 5.0 mm; common thicknesses: 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm. Custom thicknesses available |
| Sheet Size | Standard sizes: 1000×1000 mm, 1500×1500 mm, 1000×2000 mm; rolls available for thin gauges. Custom sizes and cut pieces available |
| Supply Form | Sheet, roll, cut-to-size pieces, or pre-cut gaskets subject to specification |
| Compliance | ISO 9001 quality management and RoHS compliance documentation available where applicable; confirm documentation requirements before ordering |
Sheet Dimensions
Graphite Sheet Size Chart
Graphite sheet is available in standard sheet sizes and thicknesses, with or without reinforcement. The following table lists commonly stocked dimensions. Custom sizes, thicknesses and cut pieces can be produced according to customer requirements.
| Thickness | Standard Sheet Size | Typical Application | Grade / Reinforcement |
|---|---|---|---|
| 0.5 mm | 1000×1000 mm / 1500×1500 mm | Thin gaskets, heat shields, thermal insulation | Pure / 316L foil reinforced |
| 1.0 mm | 1000×1000 mm / 1500×1500 mm | General flange gaskets, heat exchangers | Pure / 316L foil reinforced |
| 1.5 mm | 1000×1000 mm / 1500×1500 mm | Flange gaskets, valve bonnet gaskets | Pure / 316L foil reinforced |
| 2.0 mm | 1000×1000 mm / 1500×1500 mm | Standard flange gaskets, reactor sealing | Pure / 316L foil reinforced |
| 3.0 mm | 1000×1000 mm / 1500×1500 mm | Thicker gaskets, irregular flanges, large vessels | Pure / Wire mesh reinforced |
| 4.0 mm | 1000×1000 mm / 1500×1500 mm | Heavy-duty gaskets, large flanges, high pressure | Pure / Wire mesh reinforced |
| 5.0 mm | 1000×1000 mm / 1500×1500 mm | Thick gaskets, compressors, special equipment | Pure / Wire mesh reinforced |
* Reference standard sheet sizes and thicknesses are shown for procurement guidance. Available sizes depend on the selected grade and reinforcement. Custom thicknesses from 0.2 mm to 5.0 mm and custom sheet dimensions are available subject to specification.
Industrial Applications
Graphite Sheet Applications
Graphite sheet is 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.
Thermal Insulation
Heat shields, thermal barriers and insulation in furnaces, ovens and high-temperature processing equipment.
Power Generation
Gaskets for turbines, steam systems, exhaust systems and other power plant equipment.
General Industrial Sealing
Custom-cut gaskets and seals for pumps, compressors, gearboxes and general industrial machinery.
Selection Guide
How to Choose Graphite Sheet
The correct graphite sheet grade and dimensions should be selected based on temperature, pressure, chemical exposure, flange type and required reinforcement.
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 sheet is suitable for moderate pressure. For higher pressure and blow-out resistance, choose stainless steel foil or wire mesh reinforced grades.
03
Thickness & Sheet Size
Thicker sheets compensate for rough or uneven flange surfaces. Specify sheet dimensions for efficient gasket cutting.
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 sheet performance.
PROCESS / 01
Graphite Flake Expansion
Natural graphite flakes are chemically treated and expanded at high temperature to produce expanded graphite with excellent compressibility.
PROCESS / 02
Sheet Forming
Expanded graphite is compressed and calendered into sheets of uniform thickness and density. Reinforcement foil or mesh is inserted during this process.
PROCESS / 03
Inspection & Testing
Finished sheet is checked for thickness tolerance, density, carbon content, ash content, tensile strength and surface quality.
PROCESS / 04
Cutting & Packaging
Sheets are cut to standard or custom sizes, and packaged with protective interleaving for export and storage.
Why Choose hongwo
A B2B Supplier for Industrial Sealing Materials
We focus on supplying industrial sealing materials to overseas distributors, gasket manufacturers, maintenance companies and industrial buyers.
Industrial Product Focus
Focused on sealing materials and industrial
products for B2B applications.
ISO 9001 & RoHS
Quality management and RoHS compliance
documentation available where applicable.
OEM & Custom Supply
Support for customized grades, dimensions,
cut pieces and packaging.
Application-Based Support
Provide your media, temperature and pressure
so we can help identify a suitable graphite
sheet grade.
Request a Quote
Tell Us Your Graphite Sheet Requirements
The more technical information you provide, the more accurately we can recommend the appropriate graphite sheet 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 Sheet
What is graphite sheet?
Graphite sheet, also known as flexible graphite sheet,
is a sealing material made from expanded natural
graphite flakes compressed into sheet form. It is used
for high-temperature gaskets, seals and thermal
insulation.
What is the temperature range of graphite sheet?
Graphite sheet 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 sheet?
Pure graphite sheet typically handles 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 is graphite sheet 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 are the reinforcement options?
Graphite sheet is available pure (unreinforced) or
reinforced with 316L stainless steel foil, 304 foil,
or wire mesh. Reinforcement improves mechanical
strength, pressure rating and blow-out resistance.
What thicknesses and sizes are available?
Thicknesses range from 0.2 mm to 5.0 mm, with 0.5 mm,
1.0 mm, 1.5 mm, 2.0 mm and 3.0 mm being common.
Standard sheet sizes are 1000×1000 mm and 1500×1500 mm.
Custom sizes and cut pieces are available.
Is graphite sheet easy to cut and fabricate?
Yes. Graphite sheet can be easily cut, punched or die-cut
to produce custom gaskets. It can also be machined,
though care should be taken to avoid flaking.
Can graphite sheet be used for food applications?
Pure graphite sheet is generally not recommended for
direct food contact. For food-grade applications, PTFE
or other compliant materials are preferred. Please
consult for specific requirements.
Is graphite sheet 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),
thickness, sheet dimensions, media, operating
temperature and pressure, required quantity and any
compliance requirements.
Industrial Graphite Sheet
Get a Graphite Sheet Quote for Your Application
Tell us your grade, thickness, sheet size, media, temperature and pressure requirements. Our team will review your requirements and provide a suitable product recommendation and quotation.
Request a QuoteRelated Sealing Products
Complete Industrial Sealing Solutions
Explore related sealing materials and products for different industrial equipment and operating conditions.
PTFE Sheet
PTFE sheet for chemical resistance, low friction and high-temperature gasket and insulation applications.
View PTFE Sheet →Non-Asbestos Sheet
Environmentally friendly compressed fiber sheet formulated with aramid or synthetic fibers as a safe alternative to asbestos for high-temperature gasketing.
View Non-Asbestos Sheet →Rubber Sheet
General-purpose elastomer sheet available in various thicknesses and compounds for gasket fabrication, cushioning, and fluid-sealing applications.
View Rubber Sheet →Beater Sheet
Latex-impregnated cellulose fiber sheet engineered for oil, fuel, and water resistance in automotive and general industrial gasket applications.
View Beater Sheet →