Polyurethane direct buried insulation pipe prefabricated direct buried insulation pipe manufacturer

Description :

　　The structure of polyurethane directly buried insulation pipe is divided into three layers from the inside to the outside: the inner layer is the working core pipe for conveying medium, and the core pipe is generally made of seamless pipe (GB8163-87), spiral welded pipe (GB9711-88; SY/T5038-92), straight seam welded pipe (GB3092-93), galvanized steel pipe and PPR, etc. According to different user requirements, the core pipe diameter is φ 22, 25, 32, 38, 45, 57, 76, 89, 108, 133, 159, 219, 273, 325, 377, 426, 478, 529, 630, 720, 820, 920, 1220, and the middle layer The material is polyurethane foam plastic or composite thermal insulation material, the thickness of the thermal insulation layer is 30-150mm, and the outer layer is high-density polyethylene jacket pipe, glass fiber reinforced plastic winding pipe and anti-corrosion steel pipe.

　　Due to the polyurethane rigid foam insulation layer is closely bonded to the steel pipe skin, the polyurethane directly buried insulation pipe can isolate the infiltration of air and water and play a good anti-corrosion role. At the same time, its foam pores are all closed, and its water absorption is very low. The high-density polyethylene shell and fiberglass shell both have good anti-corrosion, insulation, and mechanical properties. Therefore, the outer skin of the working steel pipe is difficult to be eroded by external air and water. The reason of low water absorption is that the closed cell ratio of polyurethane foam is up to 92. Low thermal conductivity and low water absorption, combined with insulation layer and high-density polyethylene or fiberglass protective shell with good waterproof performance on the outside, have changed the traditional situation of "wet cotton jacket" for laying heating pipelines in underground trenches, reducing the overall heat loss of heating pipelines and reducing the heat loss of the heating network to 2. Polyurethane direct buried insulation pipes are suitable for insulation and cooling projects that transport various media within the range of -50150. It is widely used in insulation and cooling projects in industries such as urban centralized heating, warm rooms, cold storage, coal mines, oil pipeline ports, chemical industry, natural gas pipelines, power direct burial, air conditioning pipeline insulation, cable conduit, steam insulation pipelines, etc.

　　Polyurethane direct buried insulation pipe - advantages and characteristics

　　1. It has strong corrosion resistance and waterproof ability, and the overall cost is low

　　According to relevant departments' calculations, double pipe heating pipelines can generally reduce project costs by about 25% (using fiberglass as a protective layer) and 10% (using high-density polyethylene as a protective layer).

　　Low heat loss and energy conservation. The heat loss is only 25% of that of traditional pipes

　　Polyurethane insulation pipe with thermal conductivity and hydrophobicity of 0.03kg/cm3

　　3. Long service life

　　Proper installation and use can extend the lifespan of the pipeline network to 30-50 years, with low maintenance costs.

　　4. Less land occupation and faster construction are beneficial for environmental protection

　　Can reduce earthwork excavation by more than 50%, and reduce civil masonry and concrete volume by 90%

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