... strong making ability spiral wound gasket with inner ring and outer ring Spiral wound gasket with inner ring/ ... of multichannel sealing ,high temperature endurance, corrosion-resistantance and lower requirement of the coarseness of the flange sealing ... steem, hydrogen, natural gas, pyrolysis gas, and petrol products, acid, alkali,and salt solution,etc.Specification: SPIRAL WOUND GASKETJSD-2003 For ...