... , ISO4633, ISO7186, EN545, EN598, BS4772 Standard. Ductile Iron Flange pipe is mainly used for transferring the drinkable water and acid. With ... meters. Also we can supply weld flange pipes ,the Lenth is 2-5.8 meters.1, Standards: ISO2531, ISO4422, EN545, ... , steel crates. 5, accessories such as gaskets, bolts and nuts available upon requestMore information is available upon receipt of your enquiry.