ISO2531 ductile iron pipe (1) The standed:ISO2531-1998,EN545-2006,Class:K9 (2) DN80-DN800mm (3) T-type ductile cast iron pipe Material:Ductile iron(1) The standed:ISO2531-1998,EN545 ... -DN1000mm(6) T-type(7) High strength ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance,easy fixing ...