Ductile Iron cast iron pipes used in potable water supply project, ranged from DN80--DN1800 ... manufacturer which produce water--cooled centrifugal casting ductile cast iron pipes according to ISO2531 and EN545/598 in China. There are ... for pipeline design , pipeline laying, purches pipes fitting , PE sleeving, valves and etc. Ductile iron pipes & fittings comply with ISO 2531/BS ...