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