... /ANSI,DIN,JIS 3CCS or BVcertificates 4Durability carbon seel blind flange 1carbon steel,alloy steel 2ASME/ANSI,DIN,JIS ... flange, slip on welding flange, welding ( welded )neck flange, blind flange, orifice flange, welding plate flange, welding neck collar, ... stub end ,etc.Application range: petroleum, oil, chemical industry, electric power, ...