Polyurethane prefabricated buried insulation pipe and insulation steel pipe

Description :

　　Full name of insulation pipe: high-density polyethylene outer protective pipe polyurethane foam prefabricated directly buried insulation pipe, which is composed of working steel pipe, polyurethane insulation layer and polyethylene plastic outer protective pipe conveying medium, and is combined outward through equipment in turn.

　　Prefabricated directly buried thermal insulation steel pipe, also known as "pipe in pipe", is composed of high-density polyethylene outer protective layer, polyurethane rigid foam plastic pipe and steel pipe. The insulation layer material is 60kg/m3 to 80kg/m3 rigid polyurethane foam, which can fully fill the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer casing and the insulation layer form a solid whole. The polyurethane directly buried insulation pipe foam has good mechanical properties and thermal insulation properties. Generally, it can withstand 120 ℃. By modification or combination with other insulation materials, it can withstand 180 ℃.

　　Prefabricated buried insulation steel has become a relatively mature and advanced technology in some developed countries abroad. In the past decade, China's heating engineering technicians have been promoting the development of domestic pipeline construction technology to a higher level by digesting and absorbing this advanced technology. The practical achievements over the past decade have fully demonstrated that the construction method of polyurethane insulated buried pipes has many advantages compared to traditional trench and overhead construction. The directly buried thermal insulation pipe is composed of steel pipe conveying medium, high-density polyethylene outer sleeve, and rigid polyurethane foam insulation layer between the steel pipe and the outer sleeve.

　　Polyurethane prefabricated buried insulation steel has outstanding advantages:

　　1. Polyurethane direct buried insulation pipes have good insulation performance, with heat loss only 25% of traditional pipes. Long term operation can save a lot of energy and significantly reduce energy costs.

　　2. It has strong waterproof and corrosion-resistant capabilities, does not require a pipe trench, can be directly buried underground or in water, is easy and fast to construct, and has a low overall cost.

　　3. It also has good corrosion resistance and impact resistance under low temperature conditions, and can be directly buried in frozen soil underground.

　　4. The service life can reach 30-50 years, and correct installation and use can greatly reduce the cost of pipeline maintenance.

　　5. An alarm system can be set up to automatically detect pipeline leakage faults, accurately indicate the fault location, and automatically sound an alarm.

　　6. The service life can reach 30-50 years. Diameter: DN15-DN600 Thickness: 15-50mm Application: Central heating pipelines, refrigeration pipelines, industrial pipelines, etc.

　　7. Oxygen index: ≥ 27 Density: 40-70kg/cubic meter Hydrophobicity: 0.03kg/cubic centimeter Thermal conductivity: 0.022kcal/m.h. ℃

　　Polyurethane insulated buried pipes have become a relatively mature and advanced technology in some developed countries abroad. In recent years, Chinese heating engineering technicians have been promoting the development of domestic pipeline construction technology to a higher level by digesting and absorbing this advanced technology. The practical achievements in recent years have fully demonstrated that the construction method of polyurethane insulated buried pipes has many advantages compared to traditional trench and overhead construction. This is also the intrinsic driving force behind the rapid development of polyurethane insulated buried pipes in China's heating engineering.

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• Polyurethane prefabricated buried insulation pipe