Body flanges are critical sealing components in control valve assemblies that connect valve bodies to pipelines while maintaining pressure integrity.
Body flanges are precision-machined interface components in control valve systems that provide a bolted connection between the valve body and adjacent piping. They feature standardized bolt patterns, gasket surfaces, and pressure ratings to ensure leak-proof sealing under varying operational conditions including temperature fluctuations, pressure differentials, and fluid dynamics. These flanges serve as both structural supports and sealing interfaces in industrial fluid handling systems.
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RF (Raised Face) flanges have a raised sealing surface with serrations for gasket compression, suitable for most applications. RTJ (Ring-Type Joint) flanges have a groove for metal ring gaskets, providing superior sealing for high-pressure/temperature services (typically above Class 900).
Material selection requires evaluating fluid composition, temperature, pressure, and corrosion mechanisms. Stainless steel (316/316L) resists general corrosion, duplex steels handle chloride stress corrosion, and alloy coatings protect against specific chemical attacks. Always consult NACE MR0175 for sour service applications.
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