Performance and Selection of Metal Flange Gaskets: Key Sealing Technology for High-Temperature and High-Pressure Applications

1. Introduction

In industrial piping systems and pressure vessels, flange connections are among the most critical joining methods, and metal flange gaskets play a vital role in ensuring sealing integrity. Under extreme conditions such as high temperature, high pressure, and corrosive environments, non-metallic gaskets often fail to perform reliably, making metal gaskets the preferred solution.

This article provides a comprehensive overview of gasket types, material properties, selection criteria, and typical applications.

2. Main Types of Metal Flange Gaskets

• Ring Type Joint (RTJ): Designed for high-pressure sealing with metal-to-metal contact
• Spiral Wound Gasket: Combines metal strength and filler flexibility
• Kammprofile Gasket: Serrated metal core with soft facing for superior sealing
• Solid Metal Gasket: Suitable for extreme conditions with high preload requirements

3. Common Materials

• Stainless Steel (304/316): Corrosion-resistant, widely used
• Carbon Steel: Cost-effective for non-corrosive environments
• Nickel Alloys (Inconel): Excellent high-temperature resistance
• Copper Alloys: Good softness and thermal conductivity
• Titanium Alloys: Superior corrosion resistance

4. Selection Considerations

• Operating temperature and pressure
• Chemical compatibility
• Flange type
• Required sealing performance
• Maintenance and service conditions

5. Applications

Widely used in oil & gas, chemical processing, power generation, and aerospace industries.

6. Conclusion

Metal flange gaskets are essential for ensuring sealing reliability in extreme environments. Proper selection and design significantly enhance system safety and operational efficiency.

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