ductile iron pipe fitting ductile iron pipe fitting We are the first one that produces centrifugal casting ductile iron pipes ... covering 17 sizes of DN80-1200mm. Material: Ductile iron(1) The standed: ISO2531-1998, EN545-2006, ... T-type(6) High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance ... pipes, such as galvanized steel pipe, stainless iron pipe, etc.