Buried polyurethane insulation is a good insulation properties, plus safe, reliable, low construction cost of prefabricated buried pipe insulation. Buried pipe insulation not only has the traditional laying of the pipeline trench and overhead incomparable advanced technology, practical performance, but also has significant social and economic benefits, but also effective measures heat energy. Prefabricated buried pipe insulation technology using buried heating pipe, heating pipe technology development indicates that China has entered a new starting point. With the growing world energy demand and dwindling, energy saving, emission reduction, environmental protection has become the development trend of global, national and local governments also vigorously promote energy conservation, emission reduction, the development of environmentally friendly products, applications and industry, construction industry Polyurethane foam insulation body is an important branch of the polyurethane industry, which is characterized by a multi-purpose timber, along with insulation, waterproofing and other functions. These products since the 1960s, since the application of the European construction industry for over 40 years, some countries have passed legislation as the polyurethane insulation and waterproof construction specified timber. In recent years, with the rapid development of China's building energy efficiency market, the polyurethane foam insulation products in building insulation body of water has been widely used, has become one of the leading energy-saving insulation products market. As the integration of building insulation waterproof material, polyurethane foam breaking the traditional function of a single building materials - not waterproof insulation, insulation is not waterproof, waterproof layer insulation leakage occurs immediately once lost through insulation function. Compared with other single-function insulation or waterproofing material, polyurethane foam has obvious advantages: 1. Polyurethane foam material has a multi-function, along with insulation, water, noise, vibration absorption and many other features. 2. Insulation performance, is all the domestic building materials lowest thermal conductivity (≤0.024), the highest heat resistance of insulation materials, thermal conductivity is only half of the EPS foam polystyrene board. 3. Polyurethane foam body continuous dense skin and nearly 100% of the high-intensity interconnected wall obturator, with the ideal impermeability. Construction using the spray to waterproof insulation continuous seamless, to form a seamless whole roof and wall insulation shell, excellent water impermeability. 4. Super Sticky performance (without any intermediate adhesive material), and the roof and exterior walls bond firm, wind exposing and good anti-negative pressure performance; overall spray, completely eliminating the "hot spot" and "cold bridges" ; flexible gradient technology can effectively prevent the waterproof layer cracking; mechanized operations, automatic batching, uniform quality, construction of fast, short cycle. 5. The chemical stability, long life, the surrounding environment does not constitute pollution; from self-extinguishing fire and burn only when charring not drip, carbonized layer is essentially the same size and shape, which can effectively cut off the entry of air to prevent the fire spread, fire safety performance. As the only integrated waterproof insulation, new building materials, polyurethane foam insulation applications in the domestic construction industry is still in its infancy. Fortunately, building insulation materials for accelerating innovation, and promote the popularization and application of polyurethane foam in the field of building energy efficiency, the Ministry of Construction has set up a "working group of polyurethane building energy use," to promote the polyurethane foam insulation waterproof material in the domestic building energy industry applications.