Product Introduction
Expanded Graphite Sheet is a flexible, high-purity graphite material manufactured from natural flake graphite that has been chemically treated and expanded under high temperature, then compressed into a uniform sheet without the use of binders or fillers. This unique production process gives the Expanded Graphite Sheet outstanding thermal stability, chemical inertness, and excellent compressibility—making it the preferred material for manufacturing gaskets, seals, and thermal barriers in demanding industrial environments.
Whether you need a soft sealing layer for heat exchangers, a chemically resistant gasket for pipeline flanges, or a thermal interface material for high-temperature equipment, our Expanded Graphite Sheet delivers consistent performance across a wide spectrum of applications. It is available in multiple thicknesses, densities, and sheet sizes to match your exact production requirements.
Why Choose Our Expanded Graphite Sheet
Pure Graphite Composition
Unlike composite sheets that rely on rubber or resin binders, our Expanded Graphite Sheet is composed of at least 98% carbon. This purity translates directly into better temperature resistance, improved chemical compatibility, and reduced risk of outgassing or degradation over time.
High-Temperature Endurance
The Expanded Graphite Sheet performs reliably from cryogenic temperatures up to 650°C in oxidizing atmospheres and up to 3000°C in non-oxidizing environments. It remains flexible and resilient even after prolonged exposure to high heat.
Superior Sealing Performance
Because the Expanded Graphite Sheet has a naturally low coefficient of friction and excellent conformability, it seals effectively on irregular flange surfaces, pitted metal faces, and even glass-lined equipment where traditional gasket materials fail.
Chemical Resistance Across the Board
Resistant to nearly all organic and inorganic media—including acids, alkalis, solvents, oils, and steam—the Expanded Graphite Sheet is only attacked by strong oxidizing agents such as concentrated nitric acid or hot sulfuric acid.
Asbestos-Free and Environmentally Safe
Our Expanded Graphite Sheet contains no asbestos, no solvents, and no hazardous binders. It complies with international health and safety regulations, making it suitable for food, pharmaceutical, and cleanroom applications when specified.
Easy to Cut and Fabricate
The smooth, flexible nature of the Expanded Graphite Sheet allows it to be die-cut, punched, or hand-cut into complex gasket shapes with minimal tooling. It can also be laminated with stainless steel inserts, tanged metal, or adhesive backings.
Performance Highlights at a Glance
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Continuous operating temperature: -200°C to +650°C (oxidizing)
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Carbon content: ≥ 98%
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Density range: 0.7 – 1.5 g/cm³ (customizable)
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Available thickness: 0.2 mm – 5.0 mm
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Sheet size: 1 m × 1 m, 1.5 m × 1.5 m, or custom cut
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Color: Natural graphite grey/black
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No binder burnout or hardening over time
Application Areas
Expanded Graphite Sheet is widely used across industries that demand reliable sealing under extreme conditions:
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Chemical Processing – gaskets for reactors, pumps, and valves handling corrosive fluids
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Power Generation – turbine seals, boiler gaskets, and exhaust system joints
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Petrochemical Refining – flange gaskets for high-temperature pipelines and heat exchangers
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Automotive – exhaust manifold gaskets, cylinder head gaskets, and thermal shields
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Glass and Ceramic Manufacturing – seals for furnaces and kilns
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Pharmaceutical and Food Processing – pure graphite gaskets where contamination must be avoided
The versatility of the Expanded Graphite Sheet makes it a go-to solution for maintenance teams, gasket fabricators, and OEM manufacturers alike.
Technical Data
| Parameter | Standard Value |
|---|---|
| Carbon Content | ≥ 98% (higher purity available) |
| Ash Content | ≤ 1.0% |
| Density | 0.7 – 1.5 g/cm³ (common: 1.0 g/cm³) |
| Thickness Tolerance | ±0.05 mm for ≤1.0 mm; ±5% for thicker |
| Tensile Strength | ≥ 4 MPa (depends on density) |
| Compressibility | 30% – 50% (ASTM F36) |
| Recovery | ≥ 15% |
| Continuous Temp. (oxidizing) | -200°C to +650°C |
| Peak Temp. (non-oxidizing) | Up to 3000°C |
| pH Resistance | 0 – 14 (except strong oxidizers) |
| Sheet Dimensions | 1 m × 1 m; 1.5 m × 1.5 m; custom widths |
Values represent typical performance. Custom formulations with enhanced properties (e.g., reinforced with metal, adhesive backing) are available on request.
Custom Cutting and Converting Services
We understand that many B2B customers require more than just raw sheets. Our in-house converting capabilities allow us to supply Expanded Graphite Sheet in the form most convenient for your production:
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Pre-cut gaskets – cut to your exact drawing or sample, including complex shapes
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Tape rolls – slit to specific widths with or without adhesive backing
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Laminated sheets – combined with stainless steel foil, tanged inserts, or PTFE layers
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Adhesive-backed sheets – pressure-sensitive backing for easy installation
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Custom thickness and density – engineered to meet specific compression or recovery requirements
Send us your drawings or specifications, and we will provide a cost-effective fabrication solution for your Expanded Graphite Sheet needs.
Packaging and Delivery
Every shipment of Expanded Graphite Sheet is carefully protected to maintain its integrity during transit:
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Sheets are interleaved with protective paper and wrapped in moisture-resistant film.
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Bulk orders are packed in heavy-duty cartons or wooden crates.
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Custom-cut parts are boxed with foam dividers to prevent edge damage.
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Export shipments are fully documented and insured.
We ship worldwide by sea, air, or express courier. Standard sizes can be dispatched within 5–7 working days; custom orders typically require 10–15 working days depending on quantity and complexity.
Frequently Asked Questions
Q: What is the difference between expanded graphite sheet and flexible graphite sheet?
A: They are essentially the same material. Expanded Graphite Sheet is the industry term for the binder-free graphite sheet produced by expanding natural flake graphite and compressing it into a roll or sheet. It is sometimes called flexible graphite or graphite foil.
Q: Can Expanded Graphite Sheet be used on raised face flanges?
A: Yes, it is commonly used on raised face flanges, flat face flanges, and even glass-lined flanges due to its excellent conformability. For high-pressure applications, a reinforced Expanded Graphite Sheet with a metal core is recommended.
Q: Does the sheet harden or lose flexibility over time?
A: No. Because the Expanded Graphite Sheet contains no binders that can age or oxidize, it retains its flexibility and sealing properties even after years of service at high temperatures.
Q: Do you offer samples for testing?
A: Yes, we provide free samples of standard Expanded Graphite Sheet grades to qualified B2B buyers. Custom grades may require a small development fee, which is refundable on your first bulk order.
Q: What is the minimum order quantity?
A: For standard sheet sizes and thicknesses, we have no strict MOQ for initial trial orders. For custom cutting or laminated versions, MOQs typically start from 50–100 pieces depending on size and complexity.
Partner With a Reliable Manufacturer
Our factory specializes in the production and conversion of Expanded Graphite Sheet for sealing applications. With years of export experience and a commitment to consistent quality, we serve gasket fabricators, maintenance suppliers, and OEMs in more than 40 countries. From raw material selection to final inspection, every roll of Expanded Graphite Sheet is manufactured under strict ISO 9001 quality management.
When you partner with us, you gain access to:
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Competitive factory-direct pricing
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Fast response to technical questions
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Consistent product quality batch after batch
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Flexible order volumes to match your demand
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One-stop solution for gaskets, tapes, and die-cut parts
Get a Quote for Your Expanded Graphite Sheet Requirement
Tell us your required thickness, size, density, and quantity, and we will respond with a detailed quotation within 24 hours. Whether you need a trial order or a full container load, we are ready to support your business with high-quality Expanded Graphite Sheet.
