... produce 200 thousand tons per year covering 21 sizes. Material: Ductile iron(1) The standard: ISO2531, BS EN545/598,Class: ... T-type joint for easy connection.(6) High strength ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance ... pipeline design , pipeline laying, purches pipes fitting , PE sleeving, valves and etc. Ductile iron pipes & fittings comply with ISO 2531/BS ...