Polyurethane insulated steel pipe, heating underground insulated steel pipe production unit

规格型号：

齐全

> : >Polyurethane insulated steel pipe, heating underground insulated steel pipe production unit

: >Underground direct buried insulated pipe
Introduction to underground directly buried insulated pipe
Work within the product structure Steel pipe + polyurethane foam layer (or other insulation materials) + polyethylene outer protective pipe (including black jacket pipe and yellow jacket pipe, other outer protective pipe materials can also be used). The three are closely connected.
The production sequence is: fix the inner working steel pipe, tie the bracket (wooden bracket, plastic bracket, etc.) to fix the outer protective pipe on the working steel pipe, and gradually penetrate the polyethylene outer protective pipe corresponding to the working steel pipe from one end to It is advisable to reserve a centimeter of welding part at both ends of the working pipe, and then fix the gap between the working steel pipe at both ends and the outer protective pipe (the gap is the thickness of the insulation layer) with pre-made welding flanges. After fixing the flanges at both ends, Calculate the amount of polyurethane material required, start the polyurethane foaming machine and start pouring raw materials (the pouring density is determined according to the actual situation and the pouring amount, generally / is appropriate, and can also be determined according to engineering design requirements). After the casting is completed, remove the flanges fixed at both ends, and use polyester film to wrap the exposed polyurethane foam layers at both ends to protect the material from damage caused by external factors, and also facilitate later on-site installation and welding. Once completed, the finished tube is completed.
Significant advantages of the product
1. Energy-saving products have low heat loss
The thermal conductivity of prefabricated polyurethane directly buried insulation pipes is: b. ． c/C is much lower than other pipe insulation materials commonly used in the past, and its insulation effect is ~ times improved. Its water absorption rate is very low, approximately. /. The reason for the low water absorption rate is that the closed cell rate of polyurethane foam is as high as about 10%.
2. The product is anti-corrosive, has good insulation performance and has a long service life.
Directly buried insulated pipes have a good anti-corrosion effect because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, blocking the penetration of air and water. Moreover, its foaming holes are closed and its water absorption is very small. High-density polyethylene shell (or fiberglass shell) has good anti-corrosion, insulation and mechanical properties. Therefore, the outer skin of the working steel pipe is difficult to be eroded by outside air and water. As long as the water quality inside the pipeline is well treated, according to foreign data, the service life of prefabricated polyurethane directly buried insulated pipes can reach more than 10 years, which is ~ times longer than the service life of traditional trench laying and overhead laying.
3. It occupies less space and is fast to construct, which is beneficial to environmental protection and reduces construction disturbance to residents.
Directly buried heating pipes do not require the construction of huge trenches, and only need to bury the insulated pipes underground, thus greatly reducing the project area, reducing the amount of earthwork excavation, and reducing the amount of civil masonry and concrete. At the same time, the processing of insulated pipes and on-site trenching are carried out in parallel, and only on-site joints are needed, which can greatly shorten the construction period. By reducing the transportation of bricks, cement, sand and gravel, residual soil, etc., the amount of vehicle exhaust emissions, dust, and noise emissions during the construction process is reduced, thus protecting the environment.
4. Seat Belt Early Warning System
For prefabricated polyurethane directly buried insulated pipes, leakage alarm lines can be installed according to customer requirements. Once leakage occurs somewhere in the pipeline, through the conduction of the alarm line, it can be detected in a dedicated The instrument displays the exact location and extent of water seepage and leakage in the insulation pipe, so as to notify the leakage inspection personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating pipe network. Now we can also independently produce directly buried insulated pipes with early warning lines, which fills the gap where there was no early warning system before.
Product usage scope and fields
Prefabricated directly buried insulated pipes are widely used in the insulation and anti-corrosion of chemical, petroleum, electric power, heating and other transportation pipelines.
Example: underground thermal insulation pipeline systems such as heating pipelines, electric pipelines, oil pipelines, steam pipelines, heating pipelines, plumbing pipelines, fire protection pipelines, hot spring pipelines, heating pipelines, air conditioning pipelines, cold insulation pipelines, hot water pipelines, etc.