... ,sand pipeline, sewerage. product:not only does the ductile iron have high tensile strength and percentage elongation,but also have ... high-compression,anti-oxidation,anti-corrosion,etc.SO the ductile iron pie fittings are widely applied to such compressive pipes ... Oil pipeline gas pipeline,sand pipeline,sewerage pipeline,materia:SG IRON 500-7 ISO1083-EN1563Design load:in accordance with standards ...