Large-scale Container Equipment Manufacturing Project of Sichuan Xinshengyuan Chemical Industry “Ion Membrane Caustic Soda Equipment Technical Reform", undertook by Sichuan Changyi Oil-gas Gathering Transportation Equipment Co., Ltd., recently has be completed production and installation on Xichang site and will be hand over to use. The project is vertical atmospheric alkali liquor storage tank with maximum volume 5000 cubic meters and main size φ 19000 × 18000. They are made from composite plate. Their overall design, fabrication, raw material organization, construction, inspection and test are self-completed by our company. During manufacturing and handing over to use of this batch of large storage tanks, we have accumulated rich experience in site construction management and engineering practice, which have greatly improved the manufacturing capacity of large chemical equipment.