... Types:WN, SO, BL, Plate, Thread, Socket and etc forged BL flanges1Commodityflanges2Sizesfrom DN10 to DN30003Materialcarbon steel ... , stainless steel and alloy steel4StandardANSI, DIN, EN1092-1, NFE, ... AS, JIS and customers' drawings for special5TypesWN, SO, BL, Plate, Thread, ...