Plastic sheathed steel steam pipeline

Plastic sheathed steel steam pipelineAdvantages:

High temperature resistant prefabricated polyurethane insulation pipes do not require the construction of large trenches.

Only the insulation pipe needs to be buried underground, which greatly reduces the project land occupation, reduces the excavation volume by about 50 ℃, and reduces the civil masonry and concrete volume by 90 ℃. Together, insulation pipe processing and on-site trenching are carried out in parallel, requiring only on-site joints, which can significantly shorten the construction period. Because it reduces the transportation of bricks, cement, sand and gravel, residual soil, etc., and also reduces the emissions of vehicle exhaust, dust, and noise during the construction process.

The second advantage is low heat loss and energy conservation.

High temperature resistant prefabricated polyurethane insulation pipe: Its thermal conductivity is 0.013-0.03kca1/m.h.oC, which is much lower than other common pipe insulation materials, and the insulation effect is improved by 4-9 times. Furthermore, its water absorption rate is very low, about 0.2kg/m2. The reason for the low water absorption rate is that the nostril rate of polyurethane foam is as high as about 92%, and the low thermal conductivity and low water absorption rate, together with the insulation layer and the high-temperature resistant prefabricated polyurethane insulation pipe with good waterproof performance outside, have changed the situation of traditional trench laying of heating pipes "wearing wet cotton padded jacket", greatly reducing the overall heat loss of heating pipes. The heat loss of the heating network is 2%, less than 10% of the world's regulatory requirements

The third advantage is anti-corrosion, good bonding performance, and long service life.

The high temperature resistant prefabricated polyurethane insulation pipe has excellent anti-corrosion effect because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, isolating the entry of air and water. All of its foam holes are closed, resulting in low water absorption performance. Polyurethane buried insulation pipes and fiberglass shells both have anti-corrosion, insulation, and mechanical properties for contact. Therefore, the outer layer of the homework steel pipe is difficult to be corroded by external air and water. As long as the water quality inside the pipeline is well treated, according to foreign material analysis, the service life of high-temperature resistant prefabricated polyurethane insulation pipes can reach more than 50 years, which is 3-4 times longer than traditional trench laying and overhead laying.

The fourth advantage is reducing project costs.

According to relevant departments' calculations, dual control heating pipelines can usually reduce engineering fraud by about 25% (using fiberglass as insulation layer) and 10% (using high-density polyethylene as insulation layer).

Plastic sheathed steel steam pipelineClassification:

1、 According to its installation form, there are mainly buried polyurethane jacket insulation pipes and overhead polyurethane jacket insulation pipes.

2、 According to its temperature during transportation, it can be mainly divided into polyurethane jacket pipes at room temperature, high-temperature polyurethane pipes, and deep cold polyurethane insulation pipes.

3、 According to the different types of materials used for its outer protective layer, it can be divided into: polyurethane pipes in the form of fiberglass outer protective layer, polyurethane pipes in the form of high-density polyethylene outer protective layer, polyurethane pipes in the form of steel protective layer, and insulation pipes in the form of protective layer of some other materials. 4、 According to the different media in the transmission process, it can be divided into: professional water supply polyurethane pipe, high temperature resistant polyurethane jacket pipe, professional pipe for steam and buried rigid foam plastic anti-corrosion pipe on oil. Of course, there are many other names besides this, such as polyurethane buried pipes, polyurethane prefabricated pipes, and so on.

Jacket tube production process:

Polyurethane jacket pipes are highly popular in applications and therefore have a large demand market. Therefore, there is a significant demand for the production of polyurethane insulation pipes. For the production and processing of polyurethane insulation pipes, specific applications and structures need to be treated accordingly. For insulation layers with inner and outer sleeves, polyurethane foam insulation pipes are usually filled with foam slurry directly between the two pipes for one-time molding and foaming.

Before pouring the slurry, appropriate tools should be used to maintain good concentricity between the inner and outer pipes, and the sealing treatment at the lower part should be tight. Polyurethane jacket insulation pipes should be used to prevent slurry leakage. According to the flow state and foaming speed of the slurry, insulation layers with smaller lengths can be poured vertically, but for most insulation layers with larger lengths, steel jacket steam insulation pipes are often poured in an inclined manner to facilitate the flow and foaming of the slurry. According to the formula and construction requirements, it can be injected from one side of the upper part or from the lower part. When the polyurethane jacket pipe insulation is long, the slurry output from the mixing head can be introduced into the lower part of the pipe gap through the conduit, and gradually withdrawn from the conduit as the injection volume increases. This method is only applicable to the production of ordinary casing insulation layers below 3mm.

For the insulation layer construction of large-diameter and long sleeve type pipelines, due to factors such as material formula and production site conditions, direct buried insulation pipe manufacturers usually use the horizontal direct injection method for preparation. As the saying goes, specific methods should be applied. The processing of polyurethane jacket pipes can only have a sufficiently high usage effect under targeted processing, ensuring that their application can reach a satisfactory level.