ASME B16.20 covers dimensions, tolerances, materials, and marking for metallic gaskets used with ASME B16.5 and B16.47 flanges. It includes RTJ (R, RX, BX), spiral wound, and kammprofile gaskets.
Key requirements: R‑number system, surface roughness ≤63 µin Ra, gasket hardness at least 30 HB below flange groove hardness, permanent marking (manufacturer, material, R number, type). Pressure classes from Class 150 to 2500 (RTJ typical for Class 600+).
There are many types of RTJ gaskets, including R Gasket,RX Gasket,BX Gasket, SBX Gasket,IX Gasket,flange connections,and various customized products.We will do more sharing about ring joint gasket.
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