... , 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 used for transferring the acid in ... max. Height of 2 meters. Also we can supply weld flange pipes ,the Lenth is 2-5.8 meters.1, Standards ...