... WN, SO, BL, Plate, Thread, Socket and etc stainless steel BL flange1Commodityflanges2Sizesfrom DN10 to DN30003Materialcarbon steel, stainless steel and alloy steel4StandardANSI, DIN, EN1092-1, NFE, AS ... , JIS and customers' drawings for special5TypesWN, SO, BL, ...