【Haichuan Engineering Updates】Jingbian Natural Gas Storage and Peak Shaving LNG Project: 50,000 cubic meter LNG double-metal full-volume tank dome constructed using the \"erection method\"

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On July 14, at the construction site of the Yanchang Petroleum Jingbian natural gas storage and peak-shaving project along with its associated LNG facilities, which is being built by Shaanxi Huajian Company, two steel domes with a diameter of 51.8 meters and a weight of 457.37 tons were lifted to a height of 30.8 meters using 6 blowers. This allowed for an accurate connection between the domes and the pressure-bearing rings, laying a solid foundation for the completion of the facility. The jacking up of the dome roof of the 50,000 cubic meter LNG cryogenic bimetallic full-volume tank, marking the company’s first use of the \"formwork method\" in construction, was successful. Li Keshè, General Manager of Shaanxi Huajian, together with leaders from the project owner, general contractor, and supervision unit, witnessed the gas lifting process of the storage tank. Air lifting operations are among the most difficult, complex, and risky tasks in tank installation projects, with the \"upward installation method\" being characterized by high construction difficulty and short project duration. Once the arch top has been lifted to its installation position, and while maintaining a certain pressure, the workers fix the arch top to the load-bearing ring by welding, thereby completing the installation of the arch top.