... , oil, cement, mud suction/ discharge/ dredging HDPE Pipe for dredger is most suitable for mud & sand delivery and discharge, the performance is ... changes in temperature.6. HDPE Sand Delivery Pipe is either on land or water for using, total engineering cost is low, ... high efficiency, safer, and more convenient.HDPE pipe types: SDR33, SDR26, SDR21, SDR17, SDR13.6, SDR11 HDPE pipe for dredger