... and disassembly, ensure transportation engineering of high efficiency.5. HDPE Sand Delivery Pipe has smooth outer and inner wall, friction coefficient is ... 60 ° c, can adapt to bad weather changes in temperature.6. HDPE Sand Delivery Pipe is either on land or water for using ... engineering cost is low, high efficiency, safer, and more convenient.HDPE pipe types: SDR33, SDR26, SDR21, SDR17, SDR13.6, SDR11 ...