The Ductile iron pipes is confim to ISO2531, ISO4179, ISO8179, ISO4633, ISO7186, EN545, EN598, BS4772 Standard. Ductile Iron Flange pipe is mainly used for transferring the ... . Also we can supply weld flange pipes ,the Lenth is 2-5.8 meters.1, Standards: ISO2531, ISO4422, EN545, EN598, BS4772, AWWA C110. 2 ...