ceramic lined pipe is your best solution.To control the flow for this medium the ceramic lined valves are the best choice,because of very abrasive mediums. ■

'Pipelines' presumes a considerable pumped distance. Ductile iron is not suitable for that kind of duty. Concrete lined pipe is one option, unlined pipe is another if you are prepared to roll periodically at the flanges to balance the wear. Pumping regimes vary and so it is premature to ask this question without stating the pumped distance, solids loadings or flowrates. ■