How is the sealing performance of flexible graphite composite reinforced flange gasket under high temperature and high pressure conditions?

Flexible graphite composite reinforced flange gasket is a high-performance sealing material specially designed for high temperature and high pressure conditions. Its sealing performance and tolerance mainly depend on the characteristics of the material, the reinforcement method and the specific process design. The following is a detailed analysis of its sealing performance, maximum temperature and maximum pressure under high temperature and high pressure conditions:

Flexible Graphite Composite Material Reinforced Gasket Flange Gasket

1. Sealing performance
Flexible graphite composite reinforced flange gaskets show excellent sealing performance under high temperature and high pressure conditions. The main reasons include:
Characteristics of flexible graphite: Flexible graphite has good flexibility and resilience, can adapt to the slight unevenness of the flange surface, and provide reliable sealing effect.
Reinforcement of composite materials: By adding reinforcing materials (such as glass fiber, carbon fiber or wire mesh) to flexible graphite, the mechanical strength and creep resistance of the gasket can be improved, so that it can maintain a stable seal under high pressure.
High temperature resistance: Flexible graphite itself has high temperature resistance and can maintain its structure and performance stability under high temperature environment, thereby ensuring the sealing effect.

2. Maximum temperature
The maximum temperature resistance of flexible graphite composite reinforced gaskets usually depends on their specific formulation and reinforcement materials:
Pure flexible graphite: Generally can withstand temperatures up to 800°C (in non-oxidizing environments).
Composite reinforcements: If metal reinforcements are added, the temperature resistance may be limited by the melting point or oxidation temperature of the metal. For example, the maximum temperature resistance of stainless steel reinforced flexible graphite gaskets in oxidizing environments may be around 450°C.
Special applications: In some special designs, the temperature resistance of flexible graphite composite gaskets can be further improved by optimizing the material formulation and reinforcement method.

3. Maximum pressure
The maximum pressure resistance of flexible graphite composite reinforced flange gaskets depends on many factors, including material strength, reinforcement method, gasket thickness and installation conditions:
General application: Under normal working conditions, the pressure range that flexible graphite composite reinforced gaskets can withstand is usually 10-30 MPa (about 145-435 psi), depending on the design and material selection of the gasket.
High-pressure applications: Through optimized design and the use of reinforced materials, some high-performance flexible graphite composite gaskets can withstand higher pressures, even up to 40 MPa (about 580 psi) or more.
Limitations in practical applications: In actual working conditions, the maximum pressure resistance is also affected by factors such as flange design, preload, medium properties and temperature. For example, in a high-temperature environment, the creep and relaxation of the material may cause the actual pressure resistance to decrease.

4. Precautions in practical applications
In order to ensure the sealing performance of flexible graphite composite reinforced flange gaskets under high temperature and high pressure conditions, the following points should be noted:
Preload control: During installation, it is necessary to ensure that the preload of the gasket is uniform and appropriate. Too low preload may result in poor sealing, while too high preload may damage the gasket.
Flange surface treatment: The flange sealing surface should be kept clean, flat, and free of scratches or corrosion. The surface roughness should meet the design requirements to ensure good contact between the gasket and the flange.
Temperature and pressure matching: When selecting gaskets, appropriate materials and reinforcement methods should be selected according to the temperature and pressure range of the actual working conditions. For example, under high temperature and high pressure conditions, it may be necessary to select high-strength metal-reinforced flexible graphite gaskets.
Regular inspection and maintenance: Under high temperature and high pressure conditions, the performance of the gasket may deteriorate over time. Regularly checking the sealing performance of the flange and promptly detecting and replacing damaged gaskets can effectively avoid leakage accidents.