The directly buried thermal insulation pipeline has the excellent characteristics of high-efficiency heat preservation, waterproof, anti-corrosion, thermal insulation, sound insulation, flame retardant, cold resistance, light capacity, high strength, simple and fast construction, and not afraid of plant root spines. It has become an indispensable material for thermal insulation, waterproof and sealing in industrial sectors such as construction, transportation, petroleum, chemical, electric power, refrigeration, etc. Directly buried thermal insulation pipe is used for various indoor and outdoor pipelines, central heating pipeline, central air conditioning pipeline, chemical industry, and other industrial pipeline insulation and cold insulation engineering, oil pipeline engineering, steam transmission pipeline engineering and other pipeline engineering. The directly buried thermal insulation pipeline can be buried in 0.6-1.2m frozen soil layer, and its heat loss can be reduced by more than 40% compared with ordinary pipeline, and its service life can be increased by more than 3-5 times compared with other thermal insulation and anti-corrosion materials, and the service life can reach 30-50 years.
1. Polyurethane rigid foam has the function of one material and multi-purpose, at the same time, it has many functions such as heat preservation, waterproof, sound insulation, vibration absorption, etc.
2. Excellent thermal insulation performance, it is the thermal insulation material with low thermal conductivity (≤ 0.024) and high thermal resistance value (Zui) among all domestic building materials. The thermal conductivity is only half of that of EPS foamed polystyrene board.
3. Polyurethane rigid foam has a continuous and dense skin and close to 100% high-strength interconnected wall, which has ideal impermeability. Spraying method is used to achieve continuous waterproof and thermal insulation layer without joint, forming seamless roof and overall external wall insulation shell, with excellent waterproof and impermeability.
4. Super strong self-adhesive performance (without any intermediate bonding material), strong bonding with roof and external wall, good anti wind exposure and anti negative wind pressure performance; overall spraying construction, completely eliminating "hot spot" and "cold bridge"; flexible gradual change technology can effectively prevent the waterproof layer from cracking; mechanized operation, automatic batching, uniform quality, fast construction and short cycle.
5. Stable chemical properties, long service life, no pollution to the surrounding environment; self extinguishment of open flame, and only carbonization does not drip during combustion, and the size and shape of carbonization layer are basically unchanged, which can effectively block the entry of air, prevent the spread of fire, and have good fire safety performance.
As the only new building material of heat preservation and waterproof integration, the application of polyurethane rigid foam insulation material in domestic construction industry is still in the initial stage. Fortunately, in order to speed up the innovation of building thermal insulation materials and promote the popularization and application of rigid polyurethane foam in the field of building energy conservation, the Ministry of construction has specially set up a "polyurethane building energy saving application working group" to promote the polyurethane rigid foam thermal insulation and waterproof materials in domestic building energy conservation
