... 3)ISO2531,EN545,BS4772 4)Strength,Durability, 1.Ductile cast iron fitting-Flange socket produced according to ISO2531, EN545, BS4772, ... EN598, AWWA C110.2 and other standards.2. Material: Ductile iron 3. Inside with cement mortar lining / FBE coating ( fusion ... , flanged bend, socket bend, blank flange, flange bell mouth, collar and so on. Hydrostatic test: Norminal Diameter mmPressureTest time≤300 ...