The Meaning Of Shrink Sleeve

With the rapid development of the national economy, my country's demand for energy is increasing, and there are more and more long-distance oil transportation, gas pipeline projects and urban gas pipeline network construction. During the "1st Five-Year Plan" period, the long-distance oil and gas pipeline projects will exceed 20,000 kilometers. The urban gas pipeline network project is nearly 30,000 kilometers. The demand for heat-shrinkable sleeves exceeds 3 billion yuan, and there are very few qualified domestic manufacturers. The application prospect of shrink sleeves in anticorrosion of buried oil pipelines is very broad.

Corrosion of steel pipes generally exists in various sectors of the national economy and national defense construction, which has brought huge losses to the national economy. It also causes great difficulties in production and life. Under natural conditions (atmosphere, natural water body, soil) or artificial conditions (acid, alkali, salt and other media), steel pipes corrode all the time. A senseless waste that goes on spontaneously. The fundamental reason is that steel pipes are in a thermodynamically unstable state, and they will return to their original relatively stable state under the above conditions. Generate iron oxide carbonate and so on. Or into soluble ions. This process is the corrosion process of metal. According to statistics, my country's annual output of steel is 160 million tons. More than 60 million tons are lost due to corrosion every year. Almost equal to the annual output of Shanghai Baosteel General Iron and Steel Plant. Corrosion is not only a waste of steel resources, but also shortens the service life of pipelines and equipment due to corrosion. The cost of replacing new pipeline equipment far exceeds the price of the metal material itself, which increases production costs and reduces the direct economic benefits caused by corrosion. And the indirect economic loss is huge. Corrosion products form a scale layer, which affects heat transfer and medium flow rate, reduces heat transfer efficiency, and greatly increases energy consumption. The annual economic loss caused by corrosion in my country is as high as 280 billion yuan, which is higher than the sum of natural disasters such as wind disasters, floods, earthquakes and fires every year. And more.

Corrosion causes various accidents and major disasters. Due to the corrosion of steel pipes and equipment, the production enterprises shut down and the product quality declined. It affects the life supply, gas supply, heating steam or hot water, and brings many difficulties to people's life. Buried oil and gas, water and other pipelines, pipeline network leakage, enterprise oil refining, chemical, chemical fiber, chemical fertilizer, pharmaceutical and other pipelines and equipment running, leaking and dripping. In addition to losing a large amount of useful materials, it causes serious environmental pollution, and even causes catastrophic accidents such as fire, explosion, and collapse. In view of the ubiquity of metal corrosion. In order to prevent or slow down the occurrence of metal corrosion. Various metal anti-corrosion technologies and processes have emerged as the times require. Promotion and application of new technology, new materials and new equipment for metal anticorrosion. Extend the service life of pipeline equipment, save money and ensure safe production. my country's petrochemical, public utilities and other industries. Pipelines are perforated due to corrosion up to 20,000 times per year. It mainly occurs at the interface of the steel pipe and the bump damage of the pipe itself.

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