【Ten Years of Rapid Development in Chemical Engineering Equipment】From 2024 to 2028, Longkou’s large-diameter steel pipelines for LNG, equipped with photosensitive fiberglass lining for corrosion protection, have filled a gap in China’s industry

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Safety first. Prevention first – let’s praise and encourage the achievements in China’s chemical engineering technology and equipment. **********************【Ten Years of Rapid Development in Chemical Engineering Equipment】Regular updates and summaries are available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Chemical Engineering Forum) ***************** The fiberglass lining used in the Longkou LNG project for anti-corrosion purposes fills a gap in domestic steel pipeline technology. On November 26th, Yantai Longkou Liquidation Co., Ltd., in collaboration with manufacturers, made significant progress in the research and application of photosensitive fiberglass-based anti-corrosion techniques for large-diameter steel pipelines. This technology fills the gap in such anti-corrosion solutions for large-diameter steel pipelines in China, helping to extend the service life of these pipelines and offering good prospects for future use. It is reported that during the construction of the LNG project, Yantai Liquefied Gas Company made clever use of the waste heat water from Longkou Huaneng Power Plant; by employing an innovative system for extracting seawater using this waste heat water, it was able to channel this water to the receiving station as a heat source for gasification. For the construction of this project, it is necessary to lay a large-diameter steel pipeline that is 6.7 km long and 223 cm in diameter. The solvent-free liquid epoxy coating used in the original plan provides insufficient internal protection; it cannot withstand the impact of high-speed seawater, and thus fails to protect the pipeline from erosion, posing significant risks during the operational phase of the receiving station. Therefore, they took a different approach: they worked closely with several technical organizations, assembled a team to conduct specialized technical research with the manufacturers, and adopted an optimized anti-corrosion solution using photopolymerized fiberglass linings. Leveraging the excellent anti-corrosion properties of fiberglass as well as its thermal expansion coefficient, which is similar to that of carbon steel, they bonded the fiberglass to the carbon steel pipes, thereby extending the service life of the pipes to 70 years, reducing the need for inspections and maintenance, and lowering production risks.