... :500~3000m 3.High quality,low price 4.Used for cable system silicon core pipe is a new ... highway, railway etc. HDPE silicon core pipe, in short, silicon pipe, is extruded and composited by three ... is extruded into high-density polyethylene pipe wall synchronously, and distributed in the whole pipe inner wall uniformly, ... in the pipe.The silicon core layer in inner wall won’t react with water, and the ...