Anti corrosion sealing flange
It is a crucial component in industrial pipeline systems, whose core function is to ensure the safety and reliability of pipeline connections through corrosion-resistant materials and precision sealing design. The following provides a detailed analysis from the aspects of technical principles, material innovation, manufacturing processes, application scenarios, and industry trends:
1、 Technical principles and core functions
1. Anti corrosion mechanism
Material anti-corrosion: 316L stainless steel, duplex steel (such as F51/F53), Hastelloy C-276 and other corrosion-resistant metals are used, or carbon steel substrates are combined with hot-dip zinc and epoxy resin coatings (thickness ≥ 300 μ m).
Surface treatment: The protective performance is improved through processes such as passivation (forming oxide film), ceramic spraying (Al ₂ O Ⅲ coating hardness up to HV1200), PTFE lining (strong acid and alkali resistance), etc.
2. Sealing technology
Gasket system:
Metal winding pad: 304/316 steel strip+graphite/PTFE, temperature resistance -196 ℃~+870 ℃, pressure ≤ 300MPa.
Expanded PTFE sealing tape: The micro honeycomb structure provides high-pressure retraction elasticity, suitable for enamel and plastic flanges, and comes with adhesive backing for on-site molding.
Structural design:
Multiple sealing: such as the fixed ring+connecting ring+double sealing ring in patented technology, which enhances the anti leakage ability through a stepped sealing groove.
Detachable module: Sichuan Jingkong Valve's patented protruding flange, with a sealing protrusion that can be replaced separately, reduces maintenance costs by more than 30%.