... component Type:Octagonal,Oval and Groo Sealing Ring Gasket (wellhead equipment) API 6A gasket rings is widely used in petroleum, wellhead ... etccasing head,flange, gate valve, oil&gas industry, oil christmas tree,wellhead assembly,petrochemical industry,oil pipes,petroleumOctagonal,Oval and Grooved Shanghai ... , etc)3) Fitting(union, manifold,elbows),bops. Sealing Ring Gasket (wellhead equipment)