In the central heating project, the laying of heat pipes is one of the most important, especially in the winter due to the sinking of air currents and the general reduction of temperature and haze. The reason why the winter haze phenomenon is more serious is mainly due to the unreasonable heating methods. Therefore, many cities nowadays adopt centralized heating methods. There are many living channels in our lives. Do we not know whether the young partners have heard of the overheating pipeline? Or what is the role of the heat pipe? What is the heat pipe material ? With a series of questions, here I analyze and look forward to the status quo of domestic thermal pipeline industry, compare the current thermal pipeline materials , classification and application, and point out the current situation of the thermal pipeline industry to point out the thermal pipeline industry. Great potential and market.
Thermal pipeline introduction
The heat pipe is also called the heat pipe network. The heat pipe refers to the heat pipe that transmits heat from some heating center to the building. It must have strong anti-corrosion, anti-leakage and heat resistance properties because if leakage occurs, The consequences are likely to be large or small. The heat pipe is an ideal high-temperature liquid or high-temperature gas pipeline. Therefore, the quality, energy efficiency and energy consumption of the heat pipe are greatly linked, and in life These heating pipes are generally buried underground, and are subject to various kinds of corrosion for many years. In order to avoid accidents, the quality of the heat pipes is very critical. However, what material is used to make them?
Thermal pipe material
The production of thermal pipelines needs to consider many aspects, such as environmental conditions, under the ground or exposed to the ground, whether there are corrosive gases around, or the ambient temperature and humidity of the location, and the laying of the implementation methods. It is an important consideration for the production of heat pipes. There is also a heat pipe inside the heat pipe. If the heat insulation performance is not good, then under long-distance transportation, not only will it increase energy consumption, but it will also affect the economic efficiency. The heat pipe of the heat pipe generally uses polyurethane rigid foam as its Insulation material, with fiberglass outside as a protective shell, in addition to the steel pipe also need to be coated with a layer of anti-corrosion coating. However, the level of temperature is also a major consideration in the amount of materials used and material selection. Some are suitable for temperatures below 120 degrees Celsius, but some are up to 250 degrees Celsius. The main materials of the general heat pipe are the same, all are steel pipes, but the heat preservation and anticorrosion materials are different due to the different transportation materials. For example, the transportation of gas requires PE anticorrosion and no insulation; the hot water is made of external polyurethane heat insulation pipe. , Jacket protective layer.
Heat pipe laying
Lay on the ground: low stent, middle stent, high stent.
Underground laying: the laying of trenches, no ditch laying. Gapless laying is straight laying.
Thermal pipe prices
The price of heat pipes is about 1600 yuan per cubic meter.
Note: This price is for reference only! Due to geographical differences, of course, the price will be different. For more details on the prices, please refer to the local distributors!
Thermal pipeline construction plan
1. Burying method
The first is the method of embedding heat pipes. Most of them are buried directly. If it is a high-temperature thermal water pipe, compensation should be adopted, and if it is a low-temperature water pipe, the unburied and fully buried technology should be used. In the construction process, in order to facilitate construction and save investment. We need to identify the relevant areas for the construction of heat pipes and we must deploy some temporary water. The smooth progress of the construction, the construction unit generally have to bring their own generators, arrange the appropriate power supply adapter, to solve the electricity problems in construction and electricity consumption. After these preparations are completed, we should determine the route of the thermal pipeline according to the pre-prepared construction drawings and combine the actual conditions on site. Organize related equipment and personnel for on-site construction.
2. Specific construction
In the specific construction process, the height of the deep trenches to be excavated should be more than 3 times the height of the pipeline, and the slope should not be less than 2 ‰. Moreover, we need to regularly clean the residual sediment in the ditch, in order to prevent the future pipeline from being damaged. Before laying the pipes, small fine sand was sprinkled under the pipes and the layers were tamped. In addition, before the installation, a new visual inspection of the heat pipes should be performed. If there are quality problems, they should be promptly replaced. After the pipeline is connected, it is necessary to carry out the welding work on each pipeline. In the welding port of each pipeline, the insulation material and the casing should be the same as the pipeline material, and the airtightness of the casing should be guaranteed to meet the standard. And it should be ensured that the pipeline is forbidden to be laid on frozen soil and loose soil. During the construction of thermal pipelines, waterproofing and rain protection and other safety precautions should be made.
3. Responsibility
After completion of the pipeline construction, it is necessary to eliminate the stagnant water at the construction site before an orderly withdrawal can be made. After the construction of the pipeline is completed, the construction party should work out a quality assurance certificate to determine how long it will be for the heat pipeline. If there is a problem within the service life, then the entire responsibility should be the responsibility of the construction party. Uncontrollable factors such as earthquakes, then another theory.
Editor's summary: In the heat pipeline construction process, besides grasping the material of the pipeline itself, it is more important to strictly implement the relevant technical specifications during the construction process. Only in this way can we ensure that there will not be too many problems and flaws in the future use.
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