... sealing performance; 2.Clear contact surface and easy to replacing Spiral wound gasket : Spiral wound gasket (basic type) is made by superposing, winding and welding V ... filing. It is usually wound by stainless steel, 304,304L,316,316L,321,Ta Mon400, Inconel, asbestos (graphite, PTFE, mica, ceramic) tape ... ASME, BS, JIS and EN(DIN) standards or client request. Spiral wound gasket