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Full Localization of LNG Facilities Author/Source: Sinochem New Network Date: May 18, 2020 Clicks: 423 ——A Record of Huanqiu Company’s Construction of the 600,000-ton/year LNG Project in Tai’an The project to localize the equipment for producing liquefied natural gas (LNG) at a capacity of 600,000 tons per year in Tai’an, which was contracted out by Huanqiu Beijing Company, was successfully put into operation recently. This project was constructed using technologies independently developed in our country as well as domestically produced equipment. Among them, the dual-cycle mixed refrigerant (DMR) liquefaction technology developed by Huanqiu Company has enabled the serialization and standardization of the natural gas purification, liquefaction, and storage and transportation technologies for this project. During its implementation, the project obtained **46 patents**, established 3 **standards**, and developed over 50 proprietary technologies and construction methods. Key equipment: Fully domestically produced. According to the project leader, during the construction of this project, Huanqiu Company made full use of the advantages provided by its **Energy LNG R&D Center to lead domestic material and equipment manufacturing enterprises in joint technical efforts, achieving remarkable results in the pursuit of domestic production. Ultimately, this project achieved full domestic production of key equipment such as the refrigerant compressor and drive motor, low-temperature BOG compressor, cryogenic tank, DCS, low-temperature valves, and high-pressure frequency converters. The official stated that the localization of LNG equipment has significantly reduced the costs associated with its procurement, and its technical specifications meet international advanced standards; this has played a positive role in promoting the development of China’s LNG industry. It can be regarded as a major revolution in the development of China’s LNG equipment industry. Work together to overcome challenges and accelerate the pace of commissioning. During the project construction, Global Beijing Company overcame numerous difficulties. Especially since the beginning of the year, in the face of the severe challenges posed by the COVID-19 pandemic and the sharp drop in oil prices, and in order to enable peak-shaving reserve services as soon as possible and enhance control over oil and gas prices, the project resumed operations on February 11. To ensure the overall goal of having the device ready for gas intake and liquid discharge by the end of April, Global Beijing Company has advanced both epidemic prevention and control measures as well as the construction work simultaneously; while thoroughly carrying out epidemic prevention efforts, it has also stepped up efforts to push forward the project construction. According to Lu Yongjun, the site manager, the resumption of work on this project encountered numerous unforeseen difficulties: the spare parts that were ordered could not reach the site in time, the manufacturer’s technical support staff could not come to provide guidance, and the drivers, logistics personnel, and technical experts had to be in isolation. The various professional departments within the project team responded swiftly and strengthened their cooperation; the employees worked hard, with dedication and ingenuity, working overtime and facing challenges head-on, until the problem was successfully resolved. In addition, the instrumentation department of this project completed the pre-commissioning calibration of the plant’s electrical, instrumentation, and control systems efficiently and to a high standard in just 3 days. The process department sorted through nearly a thousand operational process parameters and carefully verified hundreds of prerequisites, addressing each one and making the necessary corrections. The electrical department resolved the issues with the fire pump motors in a very short time, enabling the plant to pass the fire safety inspections successfully. The procurement department ordered in advance the chemicals and spare parts required for commissioning, and used various methods such as phone calls, emails, and video conferences to accelerate delivery, while maintaining regular communication with suppliers to ensure that the goods arrived on schedule. The maintenance staff monitored the status of the equipment continuously to guarantee its safe and stable operation over extended periods. The construction team carried out equipment debugging and parameter verification quickly and efficiently, ensuring that everything was in good working condition. Facing the challenges – overcoming the difficulties in driving operations. The LNG storage tanks at the Tai’an project completed the pre-cooling and liquid filling processes in August 2014; now, after 6 years, pre-cooling is being carried out again, which presents significant risks and challenges. In response to this special situation, Global Beijing adjusted its strategies urgently; technical experts provided guidance via video on the pre-cooling of LNG storage tanks, the calibration of loading pumps, and the pre-cooling of LNG loading pipelines. Based on the pre-cooling process diagrams, pre-cooling times, temperature control parameters, valve operation details and other information provided by technical experts, the project team revised the specialized plan for pre-cooling the LNG storage tanks, as well as for the commissioning of the loading pumps and the pre-cooling of the loading pipelines, to ensure it suited the actual conditions on site. They organized discussions with the personnel responsible for starting up the system and bringing it into operation, and ultimately finalized the plan for pre-cooling and commissioning the LNG storage tanks. This allowed the re-pre-cooling of the tanks to be carried out smoothly, ensuring proper liquid discharge. In response to the fact that the actual operating pressure of the Tai-Qing-Wei pipeline dropped to 4.0 MPa, which did not match the designed inlet pressure, the project team took into account the actual conditions on site. The process engineers recalculated the process parameters, and through simulation calculations, nearly a hundred alarm settings were modified. The equipment specialists ensured that the plant could operate safely, stably, and optimally under the new conditions by adding compressors and adjusting the inlet and outlet pressures.