The metal ring gasket are widely used in pipe flange for oil and gas,pressure vessels,high speed joints faces,escepialy can wotk in high pressure/high temperature places.Usually there are oval type and octagonal type.Design standard as per API 6A and ASME B16.20.

Note:

When user choose octagonal type ring gasket,the hardness of gasket should less than flange 15--20HB.