... .strong making ability spiral wound gasket with inner ring and outer ring Spiral wound gasket with inner ring/centering ringThe spiral wound gasket is made of ... petrol products, acid, alkali,and salt solution,etc.Specification: SPIRAL WOUND GASKETJSD-2003 For static sealing of flange pipe, valve, ... ,non-asbestosStandard: ASME,ASNI,JIS, JPI, ISO, DN spiral wound gasket with inner ring and outer ring