... , ISO4179, ISO8179, ISO4633, ISO7186, EN545, EN598, BS4772 Standard. Ductile Iron Flange pipe is mainly used for transferring the drinkable water ... and acid. With special ductile iron material, this series of pipe fittings can also be ... C110. 2, material: DI GGG500-7 or other Ductile iron. 3, coating: Fusion bonded epoxy coating; Cement lining inside and zinc primer ...