Sanjiang Kaiyuan Co., Ltd. is located at No.1299 Yingbin Avenue, Lanxi City, Zhejiang Province. It is a national high-tech enterprise specializing in the research and development, manufacture and sales of pressure vessels. The company covers an area of 120,000 square meters and has more than 260 employees. It is one of the world’s largest manufacturers of non-refillable cylinders with an annual production capacity of 10 million B2 industrial non-refillable welded steel cylinders, 1.5 million refillable cylinders and 100,000 fire-fighting cylinders. Its products are widely used in refrigerants, helium, construction foaming agents, fire extinguishing agents and other filling applications, and are exported to more than 100 countries and regions. The company has five modern intelligent production lines, using domestic and foreign advanced production equipment such as fully automatic laser tracing welding robots, fully automatic production lines, fully automatic spraying and multi-position intelligent manipulators to achieve standardized production at each workstation. It has laboratories for X-ray real-time imaging testing, microelectronics hydrostatic blasting, material chemical composition optical analysis, and microelectronics mechanics. The company drafted GB/T17268 and owns 30 independent invention patents. It has obtained certifications from the US DOT, EU CE, Korean KGS, and BSCI. It has been awarded National High-tech Enterprise, Zhejiang Provincial Specialized and New Enterprise and approved as Zhejiang Provincial High-tech Enterprise Technical Research and Development Center. As the first enterprise in the industry to carry out automatic transformation of welding technology, it has achieved zero spatter and strong penetration of weld seams, and better product performance. It has established and implemented a quality assurance system for steel welding gas cylinder manufacturing, equipped with professional quality management engineers and technicians. It has the ability to implement a quality assurance system from research and development to production manufacturing and inspection certification. The company focuses on environmental protection standards and has established standardized waste gas and wastewater treatment stations and hazardous waste storage warehouses. It has implemented roof photovoltaic power generation, realizing energy-saving and emission reduction, and low-carbon and environmental protection. "Innovation for development, quality excellence for the future" is the motto of Sanjiang Kaiyuan Co., Ltd."