Performance characteristics: PE insulation tube also called PE outer protective tube, jacket tube, sleeve sleeve tube. The directly buried polyurethane insulation pipe is made of HDPE insulation pipe as the outer protective layer, polyurethane rigid foam plastic is filled in the middle as the insulation material layer, and the inner layer is the steel pipe. Polyurethane directly buried insulation pipe has good mechanical properties and thermal insulation properties, usually can withstand high temperature 120-180 ℃, suitable for a variety of cold, hot water high and low temperature pipeline insulation projects. Insulation pipe production line is designed with special PE insulation pipe mold, extrusion pressure is stable, thin wall pipe thickness is uniform. The extrusion speed is fast, compared with the traditional blowing type, the output is greatly increased, the surface is more bright, and the operation is highly automated.