Insulation of life up to 50 years, than the traditional trench laying, row strike laid high life 3--4 times. Other than pipe insulation material used in the past is much lower polyurethane black jacket pipe insulation, thermal insulation effect progress 4-9 times. Further its low water absorption black jacket insulation shell manufacturers, about 0.2kg / m2. The reason is because of low water absorption rate of closed-cell polyurethane foam about 92%. Prefabricated buried pipe insulation should be placed in the warehouse of how to ensure the integrity of the perfect product of black polyethylene jacket pipe insulation plant, the superiority of performance, and easy to use. First, and flammable products away from water, they will slowly erode the surface of the product inside the inner structure until eventually the entire heat pipe insulation effect is lost can not be used, resulting in a great waste products. So make sure the warehouse is clean and dry.