... for wellhead: Standard:API 6A,ISO9001 Application:Wellhead component Type:Octagonal,Oval and Grooved API 6A gasket rings for wellhead API ... 6A gasket rings is widely used in petroleum, wellhead products,gate valve,flange,etc. StandardApplicationshapeAPI 6A,ISO ... gate valve, oil&gas industry, oil christmas tree,wellhead assembly,petrochemical industry,oil pipes,petroleumOctagonal,Oval and Grooved ...