... to ISO2531, 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 ... upon requestMore information is available upon receipt of your enquiry. Ductile Iron Flange Pipe