In recent years, many significant issues have been discovered during pipeline inspections, namely, pipe body corrosion caused by the failure of joint coatings such as heat shrink sleeves and heat shrink sleeves. The quality of pipe anti-corrosion has become a key factor restricting pipeline operation. Later, according to inspections by relevant personnel, it was found that there were an average of 92 welded joints per kilometer on oil and gas pipelines that required anti-corrosion work. Therefore, pipeline anti-corrosion operations have become the only operation for service life and service life. Pipeline safe operation.

Therefore, during the discovery period, the Pipeline Research Institute conducted research on the construction equipment and supporting technologies of heat shrink sleeves and heat shrink joint coatings. "The technology of the dry film device product developed this time meets the technical requirements of GB/t23257 and the West-East natural gas pipeline 2 East section, and is used for pipeline anti-corrosion joint coating. Good results have been achieved in terms of viscoelasticity. Anti-corrosion technology, which has played a good role in pipeline anti-corrosion projects. According to the different installation processes of long-distance oil and gas pipelines, this technology can be divided into heat shrink sleeves, wet film heat shrink sleeves, dry film heat shrink sleeves, and heat shrink sleeve installation technology, effectively filling the gap in relevant fields in China."