... corrosion-resistantance and lower requirement of the coarseness of the flange sealing surface.It is widly used in power plant, ... ,etc.Specification: SPIRAL WOUND GASKETJSD-2003 For static sealing of flange pipe, valve, vessel, equipments static sealingSize choice: 1/2'' ... graphite, ptfe, asbestos,non-asbestosStandard: ASME,ASNI,JIS, JPI, ISO, DN spiral wound gasket with inner ring and outer ring