Insulation mainly used in urban water supply networks, irrigation to sprinkler irrigation diversion works and agricultural projects. Because the pipeline connected by a hot melt, fused connection pipe insulation to achieve the integration of the interface with the pipe, and can effectively resist the impact stress has been generated by internal pressure and axial stress. And the production process does not add heavy metal salt stabilizer buried pipe insulation, non-toxic material, no scaling, no bacteria, avoiding secondary pollution of drinking water. Pipe insulation is jointly constituted by steel, fiberglass inner sheath fiberglass shell, and also includes high temperature insulation insulation, lubricating layer and an elastic tight seal. The utility of the new effective solution using prefabricated buried pipe insulation insulation town central heating in 130 ℃ -600 ℃ high temperature heat transport, the slide lubrication and waterproofing exposed pipe ends.