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Views: 0 Author: Site Editor Publish Time: 2025-11-17 Origin: Site
Between pipe connections and flange joints, there are often simple-looking rubber or metal sheets quietly performing a critical function—they are the essential sealing components known as gaskets.
The primary role of a gasket is to deform elastically, filling the microscopic gaps between flange surfaces to create a reliable seal. Common types include:
• Non-metallic gaskets (e.g., rubber, graphite) suitable for low-pressure and corrosive media.
• Semi-metallic composite gaskets (e.g., metal-jacketed gaskets) that combine flexibility with high-temperature resistance.
• Metal ring gaskets used in ultra-high-pressure and high-temperature environments (such as steam pipelines at 600°C).
Material selection directly impacts sealing performance: Nitrile rubber excels in oil resistance, fluororubber withstands chemical corrosion, and expanded graphite maintains sealing integrity across extreme temperatures (-200°C to 800°C). Modern technology has also introduced advanced composites like expanded polytetrafluoroethylene (ePTFE), which enhance sealing while improving creep resistance.
Proper installation is crucial: Gasket surfaces must be free of scratches, and compression should typically be controlled between 15% and 30%. Over-compression can lead to seal failure. Regularly inspecting the tightness of flange bolts is also necessary to prevent loosening due to thermal expansion and contraction.
These thin sealing components, often just a few millimeters thick, directly influence the safe operation of chemical reactors, natural gas pipelines, and even aerospace equipment. With advancements in material science, innovative solutions like self-tightening gaskets are providing even greater reliability for industrial safety.
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