... , ISO4179, ISO8179, ISO4633, ISO7186, EN545, EN598, BS4772 Standard. Ductile Iron Flange pipe is mainly used for transferring the drinkable water and ... max. Height of 2 meters. Also we can supply weld flange pipes ,the Lenth is 2-5.8 meters.1, Standards ... : ISO2531, ISO4422, EN545, EN598, BS4772, AWWA C110. 2, material: DI GGG500-7 or other Ductile iron ...