Hot water pipe network direct buried insulation steel pipe polyurethane heating insulation pipe direct buried insulation pipe manufacturer

Description :

　　Introduction to prefabricated buried insulation pipes:

　　Prefabricated direct buried insulation pipe, also known as prefabricated insulation pipe fittings, is a type of direct buried prefabricated insulation pipe with good insulation performance, safety and reliability, and low engineering cost. Effectively solved the insulation, sliding lubrication, and waterproofing problems of prefabricated insulation pipe fittings for 130-600 high temperature heat transfer in urban centralized heating. Prefabricated buried insulation pipes not only have traditional trench and overhead pipeline technology and practical performance, but also have social and economic benefits, and are powerful measures for heating energy conservation.

　　Prefabricated buried insulation pipes mainly consist of four parts:

　　(1) Working steel pipes: According to the technical requirements of the conveying medium, seamless steel pipes, double-sided submerged arc spiral welded steel pipes are used.

　　(2) Thermal insulation layer: rigid polyurethane foam.

　　(3) Protective shell: Made of high-density polyethylene or fiberglass.

　　(4) Leakage alarm line: When manufacturing high-temperature prefabricated buried insulation pipes, an alarm line is buried in the insulation layer near the steel pipe. Once a leakage occurs in a certain part of the pipeline, through the conduction of the line, an alarm can be triggered on a dedicated detection instrument to display the accurate location and degree of the leakage, so as to notify maintenance personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating network.

　　Advantages and characteristics of prefabricated buried insulation pipes:

　　1. Reduce project costs.

　　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 thermal conductivity of prefabricated buried insulation pipes is λ=0.0130.03kcal, which is much lower than other commonly used pipeline insulation materials in the past, and the insulation effect is improved by 49 times. Moreover, its water absorption rate is very low, about 0.2kg/m2. 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.

　　3. Anti corrosion, good insulation performance, and long service life.

　　As the polyurethane rigid foam insulation layer is closely bonded to the outer skin of the steel pipe, the prefabricated 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. As long as the water quality inside the pipeline is treated well, the service life of prefabricated buried insulation pipes can reach more than 50 years, which is 34 times longer than traditional trench laying and overhead laying.

　　4. Less land occupation, faster construction, and favorable environmental protection.

　　Directly buried heating pipelines do not require the construction of large trenches, only the insulation pipes need to be buried underground, thus reducing project land occupation, reducing excavation volume by about 50%, and reducing civil engineering masonry and concrete volume by 90%. At the same time, the processing of insulation pipes and on-site trenching are carried out in parallel, and only on-site joints are required, which can shorten the construction period by about 50% or more.

AfterSalesService :

• Directly buried insulated steel pipe