It is possible to form a barrier built to separate the steam, so that both the insulation layer is a vapor barrier, do not need a separate vapor barrier. Dampness factor high. PE pipe insulation can effectively prevent the occurrence of condensation related phenomena. Fire performance: flame retardant polyethylene pipe insulation type (oxygen index ≥32) insulating material having national testing standards. And on this product in the existing foam insulation materials and compared to similar products in the toxic smoke can be counted it is minimal. 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 polyurethane buried pipe insulation, pipe implements the interface and integration of urban heating pipe insulation, and can effectively resist the impact of stress and axial stress has been generated by internal pressure. And the production process does not add heavy metal salt stabilizer, material non-toxic, non-scaling, no bacteria, avoiding secondary pollution of drinking water.