High density polyethylene polyurethane foam insulation tubes: a certain antiseptic properties of polyethylene pipe insulation, and has good insulation properties. Selection of second degree inorganic zinc primer (temperature ≥400 ℃) anti-corrosion coating pipe insulation, pipe port selection polyethylene film or three PE cold sealing tapes, insulation material multi-layer bandaging wrong seam, effectively reducing the heat loss, coat surface while using control measures, so that the temperature control jacket coating is guaranteed. It features: low heat loss pipe polyurethane insulation and energy conservation. Corrosion, good insulation properties, long service life. Prefabricated buried pipe insulation case analysis for pipeline construction for many are required to have good thermal insulation properties directly buried pipe insulation, or put into use might have a lot of unforeseen circumstances, for the construction of It is necessary to increase post-construction costs. In recent years, a better choice than the prefabricated buried pipe insulation, so it has been applied to the construction of many cities and towns were to go, it is precisely because of its lower cost of production of materials for the entire project cost It also plays a role to reduce costs.