High Temp Sealing Graphite Gasket Sheet Aging Resistant For Boilers

Products Description
 

Advanced High - Temperature Graphite Gasket Solutions for Boiler Systems

Product Engineering

Boiler - Specific Performance Features

1. Extreme Thermal Stability
   • Maintains structural integrity from cryogenic (-200°C) to superheated steam (+650°C) conditions in boiler drums and pipelines.
   • Low thermal expansion coefficient (≤3ppm/°C) prevents gasket embrittlement during thermal cycling.
2. Pressure & Corrosion Resistance
   • Withstands operating pressures up to 100 bar in high - pressure boilers while maintaining 95% compression recovery.
   • Resists chemical attack from boiler water treatment chemicals (amines, phosphates) and acidic flue gases.
3. Mechanical Durability
   • Compressive strength of 55 MPa resists deformation in boiler flange connections.
   • Self - lubricating properties reduce friction in moving parts like safety valve stems.

Applications in Boiler Systems

1. Steam Header Seals
   • Custom - cut gaskets for ASME B31.1 boiler piping, ensuring leak - free operation in high - velocity steam paths.
   • Composite designs with stainless steel reinforcement for critical superheater sections.
2. Burner Gaskets
   • Directly integrated into combustion chambers to seal against extreme temperatures and pressure differentials.
   • Graphite - ceramic hybrid versions available for biomass - fired boilers.
3. Manhole & Handhole Seals
   • Thick - cut sheets (3 - 5mm) provide reliable seals for boiler access points, compliant with ASME BPVC Section I.

Custom Specifications for Boilers

• Sizes:
  • Rolls: 1000mm/1500mm width, 30m/50m/80m length.
  • Sheets: 1000mm x 1500mm, thicknesses from 0.15mm (valve seats) to 5mm (flange gaskets).
• Density: 0.8–1.25 g/cm³ (adjustable to balance softness for dynamic seals vs rigidity for static joints).
• Special Features:
  • Laser - engraved channels for optimized heat dissipation in boiler tube seals.
  • PTFE - impregnated variants for enhanced resistance to condensate corrosion.

Compliance & Testing

• Meets EN 12952 (water tube boilers) and ASME BPVC Section VIII standards.
• Tested for creep relaxation (ASTM F38), thermal conductivity (ASTM C518), and flame spread (ASTM E84).
• CE/PED certified for pressure equipment directive compliance.

Why Choose Our Boiler Gaskets?

• Proven Reliability: Over 10 years of service life in continuous operation, reducing maintenance costs by 50%.
• Energy Efficiency: Low thermal conductivity improves boiler efficiency by 2 - 3%.
• Technical Support: On - site gasket installation training and failure analysis provided.