Wuxi polyurethane insulation pipe

Wuxi polyurethane insulation pipes, also known as prefabricated insulation pipes, are divided into two types: plastic sheathed steel insulation pipes and steel sheathed steel insulation pipes. They can be directly buried in frozen soil layers of 0.6-1.2 meters (so people are accustomed to calling them direct buried insulation pipes or prefabricated insulation pipes). Prefabricated direct buried insulation pipes have efficient insulation, waterproofing, anti-corrosion, thermal insulation, sound insulation, flame retardancy, cold resistance, anti-corrosion, light capacity, high strength, easy and fast construction, and heat loss can be reduced by more than 40% compared to ordinary pipes. The working service life is more than 3-5 times longer than other insulation and anti-corrosion materials, and the service life can reach 30-50 years.

Polyurethane insulated pipeline, also known as direct buried insulated pipeline, is composed of a working steel pipe, a polyurethane insulation layer, and a polyethylene plastic outer protective pipe that are used to transport the medium, and are sequentially combined outward through equipment.

Wuxi polyurethane insulation pipe has the following characteristics

1. Reduce project costs.

2. Low heat loss, energy-saving.

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

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

5. Safe.

Plastic sheathed steel foam insulation pipe has become a relatively mature energy-saving technology in some developed countries. With its excellent performance, convenient construction and long service life, it has brought huge economic and social benefits to users. This energy-saving technology is being increasingly applied in China

Construction technology of plastic sheathed steel foam insulation pipe

When using rigid polyurethane as pipeline insulation material, the construction methods generally include one-time foaming molding method and prefabricated foaming method, and the construction process of one-time foaming molding method is also known as injection (or pouring) foaming and spray foaming.

Plastic sheathed steel foam insulation pipe Advantages and characteristics of polyurethane insulation pipe

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).

2. Low heat loss, energy-saving.

Its thermal conductivity is: λ=0.013-0.03kal/m? h?oC， It is much lower than the commonly used pipeline insulation materials in the past, and the insulation effect is improved by 4-9 times. Moreover, its water absorption is very low, about 0.2 kg/m2. The reason for the 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, have changed the traditional situation of "wet cotton jacket" for laying heating pipes in underground trenches, greatly reducing the overall heat loss of heating pipes. The heat loss of the heating network is 2%, which is less than the standard requirement of 10%.

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

The high-temperature prefabricated directly buried insulation pipe can play a good anti-corrosion role because the polyurethane rigid foam insulation layer is tightly bonded to the steel pipe skin, which can isolate the infiltration of air and water. 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 well treated, according to data, the service life of high-temperature prefabricated buried insulation pipes can reach more than 50 years, which is 3-4 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 greatly reducing project land occupation, reducing excavation volume by more than 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 more than 50%.

5. Safe.

High temperature prefabricated buried insulation pipes produced outside of China are equipped with leakage alarm lines. Once a leakage occurs in a certain part of the pipeline, the accurate location and degree of leakage of the insulation pipe can be displayed on the detection instrument through the transmission of the alarm line.

Product related: Directly buried insulation pipe polyurethane pipeline insulation polyurethane directly buried insulation pipe