... :ISO2531-1998,EN545-2006,Class:K12 (2) DN200-DN1000mm (3) double flanged ductile iron pipe length 3mMaterial:Ductile iron(1) The ... least 130g/m as per ISO8179(5) DN200-DN1000mm(6) double flanged(7) High strength ,lighter than gray iron,good corrosion ... resistance,no furring,small flow resistance,easy fixing,long life time(8)Checked by automatic inspection equipment