... . We are the first one that produces centrifugal casting ductile cast iron pipe according to ISO2531 and EN545 in China. There ... 200 thousand tons per year covering 17 sizes.Material:Ductile iron(1) The standed:ISO2531-1998,EN545-2006,Class:K8 ... iron,good corrosion resistance,no furring,small flow resistance,easy fixing,long life time(8) Checked by automatic inspection equipment ductile cast iron ...