... . We are the first one that produces centrifugal casting ductile cast iron pipe according to ISO2531 and EN545 in China. There are 8 ... 200 thousand tons per year covering 17 sizes. Material:Ductile iron(1) The standed:ISO2531-1998,EN545-2006,Class:K8,K9 ... -DN1200mm(6) T-type(7) High strength ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance,easy fixing ...