The lifting operations for the upper and lower sections of the cryogenic tank in the safety hazard remediation project for the air separation and air compression units at China National Petroleum Corporation’s Changqing Petrochemical Company have been successfully completed

It is reported that this lifted cryogenic tank, as a core component of air separation units, has dimensions of 4100×3100×43500 mm. The lower section weighs 37.9 tons and is 23.5 meters long, while the upper section weighs 24 tons and is 20 meters long. Its high length-to-diameter ratio results in poor rigidity and easy deformation, making it extremely difficult to lift. Faced with multiple challenges such as synchronized control during lifting with two cranes, the high risk of swinging of long components, and limited space, this project was carefully planned. A segmented lifting method using a 260t truck crane as the main lifting device and an 80t truck crane for assisting was adopted, and a balance beam was specifically designed to effectively eliminate horizontal forces and protect the equipment casing and lifting lugs. Before the lifting operation, the project department completed the technical preparations, including plan formulation, strength verification, load calculation, and ground bearing capacity review. On that day, the main crane and the auxiliary crane worked in coordination; the equipment was lifted off the ground smoothly, turned upright, and placed in position with precision. The entire process was carried out safely, with the load rate kept below 74.6%.

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