... .5 OR DIN SERIES Types:WN, SO, BL, Plate, Thread, Socket and etc forged BL flanges1Commodityflanges2Sizesfrom DN10 to DN30003Materialcarbon steel, stainless steel ... -1, NFE, AS, JIS and customers' drawings for special5TypesWN, SO, BL, Plate, Thread, Socket and etc6Processfree forging, plate cutting7Packingin wooden cases ... one month after receiving the formal order 304.321 forged BL flanges