Flexible Graphite Plates
Flexible Graphite Plates are innovative engineering materials widely used in industrial applications due to their exceptional thermal conductivity, corrosion resistance, and flexibility. These plates serve as ideal sealing solutions in extreme environments where traditional materials fail.
Technical Specifications of Flexible Graphite Plates
Key Characteristics:
- Material Composition: Pure exfoliated graphite (99% carbon)
- Temperature Resistance: -240°C to 3000°C in inert atmosphere
- Thermal Conductivity: 120-170 W/mK (in-plane direction)
- Density Range: 0.8-1.8 g/cm³ (customizable)
- Compressibility: 30-60% depending on density
- Chemical Resistance: Excellent against most acids, alkalis, and solvents
- Sealing Pressure: 500-3000 psi depending on application
Performance Comparison Table
| Property | Flexible Graphite | PTFE | Metal Gaskets |
|---|---|---|---|
| Max Continuous Temp | 550°C (in air) | 260°C | 1000°C |
| Thermal Conductivity | 150 W/mK | 0.25 W/mK | 50 W/mK |
| Corrosion Resistance | Excellent | Good | Poor |
| Compression Set | <10% | 30-40% | 0% |
Flexible Graphite Plates FAQ
What makes Flexible Graphite Plates superior to traditional sealing materials?
Flexible Graphite Plates offer unique advantages including: inherent chemical resistance to most media, outstanding thermal conductivity (5-10 times better than metals), excellent sealability at low flange loads, and the ability to withstand extreme temperature cycling without degradation. Unlike elastomers that harden and crack or PTFE that cold flows, graphite maintains its properties across extreme temperature ranges from cryogenic to high heat applications.
How should Flexible Graphite Plates be stored before installation?
For optimal performance, store Flexible Graphite Plates in their original packaging in a clean, dry environment at temperatures between 10°C to 30°C. Avoid exposure to direct sunlight, ozone sources, or oxidizing agents. The material is sensitive to prolonged exposure to liquid oxidizers (like concentrated nitric acid) which can cause degradation. If stored properly, the shelf life exceeds 5 years without significant property changes.
Industrial Applications
Flexible Graphite Plates are extensively used in:
- Heat exchangers and condensers
- Chemical processing equipment
- Power generation systems
- Semiconductor manufacturing
- Aerospace components
- Fuel cell technology
Can Flexible Graphite Plates be used in oxidizing environments?
Standard Flexible Graphite Plates have limited resistance to strong oxidizing environments above 400°C. For such applications, we recommend specially treated oxidation-resistant grades that incorporate inhibitors to extend service life. These modified plates can operate continuously in air at temperatures up to 450°C, with intermittent exposure up to 600°C possible. Always consult our technical team for specific oxidizing media compatibility.
Installation Recommendations
- Clean flange surfaces thoroughly (Ra 3.2-6.3 μm ideal)
- Use proper gasket compression (typically 30-50% of original thickness)
- Apply even bolt loading in star pattern
- For best results, perform a hot retorque after initial heat cycle
- Never reuse compressed gaskets
Certifications & Compliance
Our Flexible Graphite Plates meet or exceed:
- ASTM F104, F1318 standards
- FDA 21 CFR 182.20 for food contact
- RoHS & REACH compliant
- ISO 9001:2015 quality system
- NACE MR0175 for sour service