【Ten Years of Great Progress in Chemical Engineering Technology】Inspection technologies for natural gas pipelines from 2014 to 2020 passed evaluation

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Ten years of rapid development in chemical engineering technology; praise for the prosperous and strong China. This is just a starting point to encourage more people to get involved, making things even more lively. Haichuan becomes even better with your participation – we welcome everyone to join in the forum discussions. Be careful with fire as the heat increases in July. ---------------------------------------------- In July 2020, the research project on \"Comprehensive Evaluation Techniques for Inspecting Long-Distance Natural Gas Pipelines\", carried out jointly by Sinopec’s Natural Gas Division and Dalian Research Institute of Petroleum Chemistry, passed the technical evaluation conducted by Sinopec’s Science and Technology Department. This technology plays a significant role in risk analysis and accident prevention for pipeline systems, as well as in reducing pipeline maintenance costs and optimizing management approaches. Its application can generate economic benefits of 13,600 yuan per kilometer of pipeline. 　　It is reported that the comprehensive evaluation technology for internal inspections of natural gas pipelines in China is still in its infancy. Previously, such inspections relied on data provided by foreign inspection companies, which not only resulted in high costs but also posed a risk of exposing pipeline information. 　　In 2018, the Yuji Pipeline of the Natural Gas Branch, in collaboration with the Dalian Research Institute of Petroleum and Chemical Technology, carried out a research project on comprehensive evaluation techniques for internal inspection of natural gas transmission pipelines. They established standards for the raw data obtained from such inspections, developed software for verifying and analyzing that data, and formulated decision-making criteria for pipeline maintenance based on the current conditions of pipelines in China. As a result, a complete set of techniques for the comprehensive evaluation of internal pipeline inspections was developed. According to expert evaluations, the overall technology has reached an internationally advanced level. 　　By applying this technological achievement, safety hazards have been effectively eliminated, yielding significant economic and social benefits. A comprehensive evaluation of the internal inspection for the 150-kilometer pipeline on the Xuaning Line was completed, achieving a pipeline defect detection rate of 98%. The internal inspection signal analysis and data verification for the 30-kilometer pipeline along the Yuji line were completed; compared to 2016, the matching rate of the inspection data, after removing any newly identified corrosion defects, reached 98%. This provides technical support for assessing the safety status of the pipeline, carrying out subsequent repairs, and managing pipeline integrity. 　　At present, the natural gas subsidiary possesses a complete set of internal inspection equipment and evaluation technologies with independent intellectual property rights, including magnetic flux leakage internal inspection devices for φ711 pipelines, software for the internal inspection and evaluation of natural gas pipelines, and pipeline integrity assessment techniques based on internal inspection data. Six personnel hold MFL II-level qualifications for magnetic flux leakage internal inspection, enabling them to carry out pipeline internal inspection tasks independently. This has eliminated reliance on external technologies and helped to reduce production costs effectively.