The two 50,000-cubic-meter storage tanks at the Hefei (Lujiang) LNG emergency peak-shaving reserve station and its associated pipeline project have successfully completed the pneumatic jacking process

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On January 22, the EPC project for the storage tanks of the Hefei (Lujiang) LNG emergency peak-shaving storage station and related pipeline systems, which is jointly undertaken by China National Chemical Engineering Donghua Company and China National Nuclear Fifth Corporation, achieved an important milestone. The two large liquefied natural gas storage tanks, each with a capacity of 50,000 cubic meters, have successfully completed the pneumatic jacking process, allowing for the simultaneous lifting of the domes of both tanks. This marks the transition of the project from the external civil engineering phase to the internal tank installation phase. Pressure lifting is one of the most technically complex core processes in the construction of large LNG storage tanks. The two tanks that have been elevated this time are both prestressed concrete fully enclosed low-temperature LNG storage tanks. They utilize advanced domestic technologies for dome pneumatic lifting and remote control, comprising five systems: the power system, the balancing system, the sealing system, the measurement system, and the communication system. With the coordinated operation of two blowers, the steel structural dome with a diameter of 54.8 meters and a total weight of around 400 tons was raised smoothly to a height of 29.6 meters over a period of two and a half hours, where it was precisely fitted onto the pressure-bearing ring at the top of the tank.