We produce centrifugal casting ductile iron pipes according to ISO2531 and EN545 in China.. There are 6 centrifugal ... thousand tons per year covering 17 sizes.Material: Ductile iron(1) The standard: ISO2531-1998, EN545-2006, Class: K8, K9(2 ... iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time.(8) Checked by automatic inspection equipment. ductile iron pipe ...