High Purity Graphite Gasket for Extreme Temperature & Chemical Flange Sealing
Premium flexible graphite gaskets manufactured from 98%+ pure expanded graphite, available as pure sheets, with stainless steel inserts, or as spiral wound gaskets with graphite filler. Engineered for exceptional thermal stability, universal chemical resistance, and fire-safe performance in high-temperature steam, oil, and chemical applications. Ideal for power generation, petrochemical, refining, and pharmaceutical industries. Available in custom die-cut sizes, thicknesses, and configurations for global OEM and MRO supply.
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Graphite Gasket Technical Specifications
Manufactured from high-purity flexible expanded graphite with optional stainless steel reinforcement — delivering exceptional thermal stability, universal chemical resistance, and fire-safe sealing performance for demanding flange connections.
📋 Product Parameters
| Material | Flexible Expanded Graphite (98%+ Carbon Content) |
| Reinforcement Options | Pure Graphite, SS304/SS316 Insert, Spiral Wound with Graphite Filler |
| Thickness | 0.5mm – 5.0mm (standard: 1.0mm, 1.5mm, 2.0mm, 3.0mm) |
| Sheet Size | 1000mm × 1000mm, 1500mm × 1500mm, custom sizes available |
| Die-Cut Custom Sizes | Any diameter, bolt hole configuration, or irregular shape |
| Packaging | Sheets, die-cut pieces, or gasket kits in wooden crates / cartons |
🔬 Performance Characteristics
| Temperature Resistance | -200°C to +450°C (oxidizing atmosphere) up to +3000°C (inert or reducing atmosphere) |
| Pressure Resistance | Up to 100 bar (10 MPa) depending on gasket type and thickness |
| pH Range | 0 – 14 (universal chemical resistance, except strong oxidizers) |
| Density | 1.0 – 1.6 g/cm³ (depending on material grade) |
| Carbon Content | ≥98% (standard grade) / ≥99% (nuclear grade) |
| Compression / Recovery | 15-35% compression / ≥10-15% recovery (ASTM F36) |
💡 Custom Graphite Gasket Solutions
We provide customized graphite gasket solutions including special thickness, dimensions, reinforcement options, bolt hole patterns, and die-cut configurations. Send your flange specifications, pressure/temperature requirements, or technical drawings for professional evaluation and tailored recommendations. Our engineers will help you select the optimal gasket type for maximum sealing reliability in your application.
Why Choose Our Graphite Gaskets
Reliable high-temperature sealing solutions designed for flange connections in demanding industrial applications. We don't just manufacture — we engineer sealing solutions that meet the rigorous standards of global industrial buyers.
Extreme Temperature Resistance
Graphite gaskets maintain excellent sealing integrity from cryogenic temperatures to +450°C in oxidizing environments, making them ideal for steam, hot oil, and high-temperature process piping systems.
Universal Chemical Resistance
High-purity graphite is virtually inert to all chemicals across the full pH range (0-14), except strong oxidizing agents. Ideal for aggressive chemical and petrochemical processing applications.
Fire-Safe & API 607 Compliant
Graphite gaskets maintain their sealing integrity even in fire conditions, meeting API 607 and fire-safe certification requirements for critical valve and piping applications.
Precision Die-Cutting
Advanced die-cutting machines ensure accurate dimensions, clean edges, and consistent bolt hole alignment for easy installation and reliable sealing every time.
Application-Specific Engineering
We analyze your flange pressure, temperature, and media to recommend the optimal graphite gasket type, thickness, and reinforcement for your specific sealing needs.
OEM & Global Export Supply
Flexible production capability for distributors, flange manufacturers, and industrial maintenance projects worldwide. Professional export packaging and documentation.
Graphite Gasket Applications
Our graphite gasket products are widely used in high-temperature, high-pressure, and chemically aggressive flange sealing across global industrial sectors. We provide tailored solutions for each specific operating condition.
Power Generation
Steam turbine flange gaskets, boiler manhole gaskets, and high-pressure steam line sealing in thermal, nuclear, and combined-cycle power plants.
Petrochemical & Refining
Flange sealing for high-temperature hydrocarbon transfer, heat exchanger gaskets, and reactor sealing in refineries and petrochemical facilities.
Chemical Processing
Corrosion-resistant gaskets for acid, alkali, and solvent piping systems, reactors, and process equipment in chemical plants.
Pharmaceutical Industry
High-purity graphite gaskets for sanitary and high-purity process piping, reactors, and filtration equipment in pharmaceutical manufacturing.
Valve Bonnet & Cover Sealing
Bonnet gaskets and cover seals for high-temperature and high-pressure valves in steam, oil, and chemical service.
Marine & Offshore
Exhaust system flange gaskets, heat exchanger sealing, and high-temperature piping on ships, FPSO vessels, and offshore platforms.
Pipeline & Piping Systems
High-temperature flange gaskets for steam distribution, hot oil transfer, and chemical process piping in industrial plants.
OEM Equipment Manufacturing
Custom die-cut graphite gaskets supplied to boiler, heat exchanger, valve, and piping equipment manufacturers as original components.
Why Choose Hongwo Sealing Solutions
A trusted manufacturing and engineering partner serving global industrial buyers with high-performance graphite gasket solutions. We combine direct factory pricing, technical expertise, and reliable export logistics.
- ✓ Direct Factory Manufacturing — Own production capability ensures stable quality, competitive pricing, and reliable supply for graphite gasket products.
- ✓ Application Engineering Support — Our technical team evaluates your flange pressure, temperature, and media to recommend the optimal gasket type and thickness for maximum sealing life.
- ✓ Advanced Die-Cutting Capability — CNC die-cutting machines ensure precise dimensions, clean edges, and consistent hole alignment for all custom gasket configurations.
- ✓ OEM Custom Solutions — Manufacture gaskets according to customer drawings, dimensions, and specific technical requirements for boilers, heat exchangers, valves, and piping.
- ✓ Strict Quality Inspection — Inspection of graphite purity, thickness, density, carbon content, and compression/recovery properties on every batch.
- ✓ Global Export Experience — Professional export packaging, documentation, and international logistics support for customers in over 50 countries.
Quality Control & Manufacturing Standards
Every graphite gasket product is manufactured and inspected according to strict ISO 9001 quality management procedures, ensuring consistent performance and reliability for global industrial buyers.
ISO 9001:2015
Certified Quality Management
API 607 / Fire-Safe
Fire-Safe Compliance Certified
Material Testing
Carbon Content & Density Verification
Dimension Control
Thickness, ID/OD & Bolt Hole Precision
Export Packaging
Safe International Delivery
Frequently Asked Questions
Common questions from international buyers about graphite gasket selection, customization, and global supply.
Get Your Graphite Gasket Quote Today
Tell us your flange specifications and sealing requirements. Our engineers will provide a tailored graphite gasket solution with competitive factory-direct pricing.
- Factory direct quotation
- Application-specific recommendations
- Custom die-cut dimensions
- Fire-safe certified options
- Worldwide export service
Request Your Quote
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