The construction of the main body of the desalinated water tank for Nantong Blue Sea New Materials has been successfully completed

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On December 22, the Nantong Blue Sea New Materials project team of the Fifth Branch successfully overcame the challenge of fabricating stainless steel demineralized water tanks on-site in a non-standard manner, and completed the construction of the tanks for the two 1000m³ core equipment units at the demineralized water station. This was also the first time that the team succeeded in fabricating thin-walled stainless steel storage tanks on-site as part of the Blue Sea New Materials project. It is understood that these storage tanks are made of high-quality S30408 stainless steel, with dimensions of Φ12000mm×10150mm, and the weight of each tank is approximately 40 tons. Given the complex on-site production conditions and high technical requirements, the project’s technical team carried out thorough planning in advance and took precise actions. In terms of deformation control, in addition to installing expansion rings along the circumference of the tank wall, temporary supports are also added on the inner side of the tank wall to ensure that the degree of deformation during assembly welding remains strictly within the limits permitted by the design ； In terms of environmental control, a fully enclosed temporary windproof processing shed was set up on site, along with humidity and dust removal equipment, to create a stable and controllable optimal working environment for stainless steel processing and welding operations. To effectively prevent carburization and electrochemical corrosion that may occur during the on-site fabrication of S30408 stainless steel, the project team developed and strictly implemented a comprehensive protection plan: padding made of the same S30408 material was installed on all tools, lifting equipment, expansion rings, etc. that come into contact with the tank walls, thereby achieving physical separation between carbon steel and stainless steel. At the same time, the inner and outer surfaces of the tank wall are fully covered with a special protective film, which effectively prevents scratches and contamination on the tank and ensures that its corrosion resistance meets all required standards.