... ,ss316,ss31803 316L with inner ring and outring graphite tape,PTFE tape spiral wound gaskets semi-metallic gasket ... fields of petrochemical, mechanical manufactory, power station, metallurgy, shipbuilding, medical and pharmaceutical nuclear power station and navigation, etc.APPLICATION:We ... );316(L)321;317L31803Monel,Ti,NiINCHast.C/BZr702 etc. Graphite, PTFE,AsbestosNon-asbMica,etcCS,304(L), 316(L),321 ...