Installation quality of electric heat tracing belt

　　The performance of electric tracing system is like a mirror, which truly reflects the quality of installation. In the field of industrial thermal insulation, even the most advanced electric heating products need to rely on standardized installation technology to play their due role. From the first winding on the surface of the pipeline to the last wiring of the control cabinet, every installation detail is related to the operation safety and energy efficiency performance of the whole system. Excellent installation quality not only ensures the stable operation of the heat tracing system, but also prolongs the service life of the equipment and reduces the maintenance cost, which has become the industry consensus.

　　The installation quality of electric tracing belt is first reflected in the pipeline pretreatment. The cleanliness of the surface of the traced pipe directly affects the heat transfer efficiency. Experienced installation team will use special solvents to remove grease, rust and impurities on the surface of the pipe to ensure that the tracing belt and the pipe can fully contact. In the low temperature environment, it is necessary to preheat the pipeline to avoid frosting affecting the installation quality. The comparative data of a petrochemical enterprise shows that the thermal efficiency of the heat tracing system of the pipeline with strict surface treatment is 18% higher than that of the ordinary installation. Pretreatment also includes checking the spacing of pipe supports. Too long unsupported span will lead to pipe sag, which will lead to uneven stress on the tracing belt. This hidden danger must be eliminated before installation. The laying technology of the tracing belt is the core link of quality control. When laying in parallel, it is necessary to keep the tracing tape closely attached to the pipeline, and when winding in spiral, it is necessary to ensure the uniform circle distance. The installation of key parts is particularly important: the valve should be laid around to ensure the uniform distribution of heat; Vibration allowance should be reserved at the pump body; The instrument interface needs to avoid sensitive components. The professional installation team will use high-temperature aluminum foil tape to fix the heat tracing belt, which can not only enhance the heat conduction, but also won't fail at high temperature like ordinary tape. The reliability of electrical connection is directly related to the system safety. The sealing treatment of power junction box must use special waterproof mortar to ensure that water vapor does not enter in wet environment. Grounding system should not only meet the specification requirements, but also consider corrosion factors. It is usually recommended to use copper grounding wire and do anti-corrosion treatment. The installation position of the temperature sensor is even more critical, and it must be set at the most representative temperature measuring point to avoid interference from local heat sources or cold sources. The construction quality of insulation layer is often underestimated, but it has a great impact on the energy efficiency of the system. High-quality thermal insulation materials should completely wrap the heat tracing belt and pipeline, and any gap will form a thermal bridge, which will lead to energy loss. In humid environment, a waterproof cover should be installed outside the insulation layer to prevent moisture from invading and reducing the insulation performance. Professional installation team will pay special attention to the compression ratio of thermal insulation materials, and excessive compression will reduce the thermal insulation performance by more than 30%. The measured data of a thermal power plant show that the heat loss of the insulation system with standardized construction is reduced by 40% compared with that of ordinary installation, and the annual electricity cost is saved by more than 150 thousand yuan.

　　The verification of installation quality can not be ignored. Before the system is put into operation, a comprehensive insulation test must be carried out, and a 1000 megohmmeter should be used to ensure that the standard of more than 50MΩ is reached. The temperature balance test verifies whether the heat tracing system can maintain the set temperature in each section, and this test should be carried out under the most unfavorable environmental conditions. The acceptance standard of a multinational company even includes infrared thermal imaging scanning, which directly evaluates the installation quality through temperature distribution map. Although these strict verification procedures increase the initial cost, they can effectively avoid the later operation problems.

　　The professional quality of installers is the basis of quality assurance. A qualified installation team should not only master electrical and thermal insulation knowledge, but also understand the characteristics of the heat tracing medium. For special occasions such as explosion-proof areas, food industry, etc., special qualification certification is needed. Continuous technical training enables installers to keep up with the pace of product updates. For example, the installation of new graphene tracing belts has special process requirements.

　　Long-term maintenance of installation quality is equally important. The installation of the specification should include a complete identification system, clearly indicating the power point, loop number and other information, which is convenient for later maintenance. The integrity of installation files is also very important, and detailed installation drawings, test records and product information should be kept. The digital installation file system established in a large refinery shortens the average fault handling time by 70% and greatly improves the maintenance efficiency. In the whole life cycle of electric heat tracing system, high-quality installation is like a solid cornerstone, which supports the efficient operation of the system. It is not only the satisfaction of technical requirements, but also the embodiment of engineering ingenuity. With the progress of technology and the improvement of standards, the installation quality of electric tracing belt is changing from experience-oriented to data-driven, and more accurate quality control is achieved through digital tools. This transformation will further improve the stability and reliability of installation quality and lay a solid foundation for the wide application of electric heat tracing technology.