Buried polyurethane insulation steel pipe in the high temperature environment operation stability assessment

Number of visits：2 seconds Update time：2025-01-14

I. Material performance analysis

(A) Polyurethane material high temperature resistance performance

Polyurethane is a kind of polymer material with excellent heat resistance. It can be used stably for a long period of time at a temperature of 100℃, and can withstand temperatures as high as 125℃ even during short-term use. This feature makes the buried polyurethane insulation steel pipe in the high temperature environment with excellent heat resistance, for the long-term stable operation of the pipeline provides a solid material foundation.

(B) the heat insulation performance of the insulation layer

Buried polyurethane insulation steel pipe insulation layer is mainly composed of polyurethane foam. The thermal conductivity of polyurethane foam is extremely low, which means that it can effectively prevent the transfer of heat. In a high temperature environment, this thermal insulation performance is particularly important, it can significantly reduce the conduction of heat from the external environment to the inside of the pipeline, thus ensuring that the temperature of the medium inside the pipeline remains relatively stable, maintaining the normal operation of the pipeline system, and avoiding damage to the pipeline or other operational failures due to high temperatures.

Second, the optimization of structural design

(A) the reasonable design of the inner diameter of the pipe

The size of the inner diameter of the pipe has a direct impact on the speed of heat transfer. In high temperature environments, the reasonable design of the inner diameter of the pipeline is crucial. Appropriate reduction of the inner diameter of the pipe can reduce the speed of heat transfer and enhance the insulation effect. Therefore, in the design of buried polyurethane heat preservation steel pipe, the size of the inner diameter should be fully considered, and the appropriate inner diameter should be selected through accurate calculation and scientific design, in order to improve the long-term operational stability of the pipeline in the high temperature environment, and to ensure that the pipeline system can be operated safely and efficiently under high temperature conditions.

(ii) Selection of connection method

Buried polyurethane insulation steel pipe connection has far-reaching influence on its long-term operational stability. In the high temperature environment, the pipeline connection is subjected to large thermal stress, so it is necessary to choose a good sealing, high temperature resistant connection. Heat fusion welding is an ideal connection method, which can make the pipe connection form a whole, with good sealing and high strength, and can effectively prevent the leakage of high temperature medium and the intrusion of external heat. Fastener connection is also a feasible option, through the use of high-quality high-temperature fasteners, can ensure the firmness and reliability of the pipeline connection. Select the appropriate connection method, can ensure buried polyurethane insulation steel pipe in the high temperature environment, long-term stable operation, reduce due to the failure of the connection and lead to pipeline leakage, damage and other accidents.

Third, construction quality control

(A) pipe pre-burial process optimization

Buried polyurethane insulation steel pipe pre-embedded construction process plays a vital role in its long-term operational stability. In the high temperature environment, some details of the construction process may have a significant impact on the operation of the pipe. Therefore, the pre-embedding process must be optimized to ensure the verticality and horizontality of the pipe in the pre-embedding process. The verticality and horizontality of the pipeline are not only related to the appearance quality of the pipeline, but more importantly, they directly affect the force and heat distribution of the pipeline. If the pipe is deformed or locally heated unevenly during the pre-burial process, it may lead to stress concentration of the pipe, thus accelerating the aging and damage of the pipe. Through the use of advanced construction equipment and precise construction methods, strict control of the pre-embedded quality of the pipeline can effectively avoid the occurrence of these problems, and provide a strong guarantee for the long-term stable operation of underground polyurethane heat preservation steel pipe.

(B) waterproof, anti-corrosion measures to improve

Buried polyurethane heat preservation steel pipe in the high temperature environment, in addition to withstand the test of high temperature, but also susceptible to the erosion of groundwater and chemical substances in the soil. These external factors will cause damage to the material of the pipe and the insulation layer, resulting in pipe aging and failure, shortening the service life of the pipe. Therefore, it is crucial to strengthen the implementation of waterproofing and anti-corrosion measures. During the construction process, suitable waterproof materials and anti-corrosion coatings should be selected to provide all-round protection for the pipeline. The waterproof material can effectively prevent the penetration of groundwater and avoid the damage of moisture to the pipe insulation layer; the anticorrosion coating can resist the erosion of chemical substances in the soil and protect the outer wall of the pipe from corrosion. By perfecting the waterproofing and anticorrosion measures, it can significantly improve the corrosion resistance and service life of buried polyurethane heat preservation steel pipe in high temperature environment, ensure the long-term and stable operation of the pipeline system, and provide users with reliable energy transmission services.

Translated with DeepL.com (free version)