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According to Sinochem News, on December 22, the super-large ethylene oxide (EO) reactor manufactured by Nanjing Chemical Industry Co., Ltd. of Sinopec Group for Rongsheng Petrochemical was officially shipped to the project site. At 21.35 meters in length, 9.97 meters in diameter, and weighing 1,054 tons, this \"giant\" is the largest EO reactor ever built by Nanhua Machinery to date. As a key component of Rongsheng Petrochemical’s 300,000 tons/year PEO production facility, this equipment faced challenges from the very beginning of its construction: the construction period was reduced to 12 months, which is nearly 2 months shorter than the usual time required for EO reactors of similar capacity ； The flatness of the tube sheet weld joint must be kept within 5 millimeters; high-precision surface processing after cladding, as well as strict accuracy requirements for grid fabrication and cylinder assembly, are also necessary ； At the same time, due to the use of special materials in the equipment, it becomes significantly more difficult to control the welding process. Wang Jianwen, the project leader for the Nanhua Machinery project and deputy manager of the Production and Maintenance Department, explained that in order to overcome this challenging task, the company formed a special task force. To address the problem of tube sheet deformation, they adopted an innovative approach involving \"segmented deformation prevention + simultaneous stress release\", which enabled them to keep the flatness within 4.8 millimeters. Moreover, all 4 joints and circumferential welds on the two tube sheets passed the non-destructive testing on the first attempt ； Grid manufacturing has been designated as a key project for focused development, with simultaneous optimization of the coordinated error control in component processing and assembly ； To overcome the challenge of a weight of 1,054 tons, 4 thousand-ton hydraulic jacks were coordinated to work together, enabling safe relocation within the factory building without the use of cranes. During transportation, the equipment’s height exceeded the limits of conventional pipe tunnels; the team planned the route in advance and adjusted the two supports so that they could be welded on-site at the storage and transportation facility, thereby overcoming the challenges associated with transporting such oversized items. Through an efficient organizational model of \"parallel processing + 24-hour shifts,\" the cycle times for key processes such as tube sheet processing, grid assembly, and tube end welding were reduced by 10%, enabling timely completion of manufacturing and shipment.