Lanshi Heavy Equipment and Nanjing Engineering’s \"lean manufacturing of spherical shell plates + full-position automatic welding\" technology contribute to the intelligent construction of storage tanks at Maoming Petrochemical Plant

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As China’s spherical tank manufacturing industry moves toward digitalization and intelligence, LANSI Heavy Equipment makes full use of its expertise in manufacturing shell plates to assist Sinopec Nanjing Engineering Company in adopting a \"high-precision, digital, and intelligent\" approach. Through process optimization and intelligent control, as well as the use of digital processing methods to replace traditional manual operations, a lean manufacturing system that covers the entire process of spherical tank formation, processing, and pre-assembly has been established. This enables precise control over the key dimensions of the shell plates and standardization of groove processing, thereby significantly improving the accuracy and stability of the manufacturing process. The success rate of first-time production meets industry-leading standards. Recently, Lansi Heavy Equipment’s Sphere Tank Engineering Branch, by leveraging the \"lean manufacturing technology for sphere shell plates,\" successfully completed the production and delivery of the sphere shell plates for 6 3000m³ light hydrocarbon tanks and 3 000m³ refinery propylene storage tanks as part of the Maoming Petrochemical’s refinery upgrading and ethylene quality improvement projects. Sinopec Nanjing Engineering Company successfully completed the welding of the first spherical tank by applying the \"new construction technology for spherical tanks based on full-position automatic welding,\" with a first-pass qualification rate of 99.17% in TOFD (ultrasonic diffraction time-of-flight) testing. The combined technology of \"lean manufacturing of spherical shell plates + full-position automatic welding\" employed by both parties has enabled a successful transition from research and testing to actual engineering applications, setting a benchmark for the intelligent construction of spherical tanks in the Maoming Petrochemical project as well as for the high-quality development of the industry. “The combination of \"lean manufacturing for sphere shell plates + full-position automatic welding\" technology is an important element in turning the Maoming Petrochemical project into a **high-quality project. By combining virtual simulation with physical testing, the assembly process can be optimized in advance, which reduces the need for on-site adjustments and enables the sphere shell plates to be installed in one go. The successful implementation of this project further demonstrates the advancement of LANSHI Heavy Equipment’s lean manufacturing technology for spherical shell plates, providing strong support for promoting the integrated use of manufacturing techniques and automatic welding technologies in the production of components for large pressure vessels.