inch ductile iron pipe 1.ISO2531,EN545,GB/T13295-2003,K10 2.DN100-1000mm ... 3.Pull strength: >420MPa Details of inch ductile iron pipe:(1) The standed:ISO2531-1998,EN545-2006,Class:K8,K9 ... ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance, easy fixing,long life time