... surface machining 3.strong making ability spiral wound gasket with inner ring and outer ring Spiral wound gasket with inner ring/centering ... , and petrol products, acid, alkali,and salt solution,etc.Specification: SPIRAL WOUND GASKETJSD-2003 For static sealing of flange pipe, valve ... , stainless steel as ss304 3316,AS31803, alloy, and so on.Spiral material:A3 ,OCr13, 1Cr13, 1Cr18,Ni9, Ti ,304, 316 ,316L ...