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