High-density polyethylene plastic outer polyurethane foam prefabricated direct buried insulation pipe

Polyurethane insulation pipes, also known as thermal pipe networks, are mainly used as directly buried pipes for heating and heating. Then today, the technicians of the thermal pipeline insulation plant will introduce you to the introduction of the thermal pipe network. Heat pipes not only transmit heat, but also have excellent heat insulation effects. Although the temperature inside the pipeline is very high, the temperature on the outside is very low, and it will not burn the high temperature. The insulation materials of thermal pipelines are divided into two types, namely inorganic insulation materials and organic insulation materials, because inorganic insulation materials include foam concrete, glass wool, diatomaceous earth, shrink rock, etc., which are very heat-resistant and can be used for a long time. With the development of technology, but transportation is very cumbersome.

　　Therefore, on the basis of inorganic insulation materials, polyurethane rigid foam insulation materials from foreign developed countries have been introduced, which are more heat-resistant, will not cause pipeline deformation due to high temperature, long service life, and will not be corroded or damaged for many years. In particular, transportation and construction are convenient.

　　The market demand for direct buried hot water prefabricated insulation pipes is becoming larger and larger, and it is developing rapidly. The emergence of this situation is mainly due to the following reasons: our country needs to promote energy-saving and environmental protection policies such as "central heating", "cogeneration" and "triple supply"; the acceleration of modern civilized urban construction and high requirements for energy conservation and environmental protection; In order to improve the quality of life of the people, the heating range is expanded from the cold "three norths" (i.e., North China, Northeast and Northwest) to the vast "transition areas" with cold winter and hot summer. We have made great progress in research, development and application: In order to meet the rapid development of direct buried steam pipeline market demand, the majority of scientific and technological personnel and manufacturers in our country have made great efforts in the research, development and application of direct buried steam pipeline technology. The diversification of insulation structure types and materials, and the scale of engineering practice, none of them can compare with us.

　　The inner pipe of the insulation pipe will generally be used, seamless steel pipe, spiral steel pipe, straight seam welded pipe, polyurethane insulation pipe is widely used in the transportation pipe network of liquids and gases, and chemical pipeline insulation engineering. Petroleum, chemical, central heating network, air conditioning and ventilation ducts, municipal engineering, etc.

　　Polyurethane insulation pipe is the most ideal, most commonly used and favorite pipeline insulation profile in the world's energy-saving pipeline transportation and application, polyurethane insulation pipe has different materials, specifications, synthesis, and slight differences. Polyurethane insulation pipes can be divided into polyurethane direct buried insulation pipes and overhead polyurethane insulation pipes according to different laying methods; According to the temperature of the conveyed medium, it can be divided into room temperature polyurethane insulation pipe, high-temperature polyurethane insulation pipe and cryogenic polyurethane insulation pipe; According to the different outer protective layers, it is divided into FRP outer layer polyurethane insulation pipe, high-density polyethylene outer layer polyurethane insulation pipe, steel outer layer polyurethane insulation pipe, etc. Finally, according to the different conveying media, it is divided into buried rigid polyurethane foam anti-corrosion insulation pipe, steam directly buried polyurethane composite prefabricated insulation pipe and high-temperature resistant polyurethane insulation pipe.