Tank Roofs raised on all four 220,000 cubic meters storage tanks of the Longkou LNG project

On December 15, 2021, the national natural gas infrastructure interconnection and the key project of the Bohai Rim production, supply, storage and marketing system-the first phase of the first phase of the Longkou Nanshan LNG Receiving Station Project (hereinafter referred to as Longkou LNG) of the State Pipeline Network Group 22 The top of the 10,000 cubic meter storage tank was successfully raised. Since the topping of the 4 storage tanks of the Tianjin LNG receiving station on November 15th, the National Pipeline Network Group has successfully completed the topping of 8 220,000 cubic meters of LNG storage tanks within one month.

The Longkou LNG project is located in Longkou Port District, Yantai City, Shandong Province. The annual construction scale of the first phase of the project is 5 million tons of LNG. It is planned to be completed and put into operation in 2023. By then, Longkou LNG's single-day natural gas transmission capacity will reach 40 million cubic meters, which will be able to provide continuous and stable clean energy for Shandong Province and even the Bohai Rim region, effectively enhance the capacity of regional peak shaving, emergency storage and winter supply, which is important for promoting my country's energy Structural adjustment, promotion of regional economic development, and achieving carbon peak and carbon neutrality are of great significance.

The gas-lifting operation of the storage tank completed this time is one of the most difficult, most complex and risky procedures in the construction of large-scale LNG storage tanks. The principle is to deliver low-pressure air to the sealed space in the tank to overcome the tank roof structure. The self-weight and the friction with the tank wall are raised to the design height at a uniform speed, and are connected with the compression ring to form a complete dome structure.

The 220,000 cubic meter storage tank of Longkou LNG Phase I project has a single bearing platform with a diameter of 93.4 meters and a tank height of 60.4 meters. The space inside the tank can stack two Boeing 747 passenger planes; the dome structure weighs about 850 tons, which is more than domestic The weight of the dome of the same type of storage tank is reduced by about 300 tons, realizing the optimal design; the dome span is 88 meters, and the lifting height is 44.5 meters. The successful completion of the gas jacking operation of the storage tank marked the transition of the project construction from the civil construction stage to the installation stage, laying a solid foundation for the smooth commissioning of the project.