Qingdao Changlong Heavy Equipment Co., Ltd. was established in 1994, with the pressure vessel division's factory area covering approximately 100,000 square meters. Over the years, Changlong has been dedicated to the research, design, and manufacturing of pressure vessels and energy-saving environmental protection equipment for industries such as thermal power, nuclear power, petrochemical, coal chemical, and fertilizer.
Qingdao Changlong Heavy Equipment Co., Ltd. was established in 1994 and has a pressure vessel division and a rail transit subsidiary. The factory area of the pressure vessel division covers approximately 100,000 square meters, while the rail transit subsidiary covers about 26,500 square meters. The company employs nearly 400 people, including over 60 professional technicians and more than 10 external expert consultants.
Qingdao Changlong Heavy Equipment Co., Ltd. serves various fields such as coal power, nuclear power, petrochemical, coal chemical, fertilizer, alumina, and rail transit. The company integrates research and development, design, production, and sales, with an annual production capacity of 1,500 pressure vessels (sets). Its products are sold to more than 30 provinces, cities, and autonomous regions across China, as well as over 50 countries and regions in Europe, America, and Asia.
Over the past 30 years, the company has collaborated with universities and research institutions such as Zhejiang University, China University of Mining and Technology, China University of Petroleum, and Qingdao University of Science and Technology. Through these partnerships, it has absorbed and integrated advanced domestic and international technologies. The company has developed and manufactured various heat exchangers for the petrochemical industry, high-efficiency rotating membrane built-in deaerators, high and low-pressure heaters, and pressure vessels for the alumina industry. It has obtained more than 40 patents for inventions and utility models and participated in drafting the "HG/T20584-2020 Technical Specification for the Manufacture of Steel Chemical Vessels."
Qingdao Changlong Heavy Equipment Co., Ltd. has specialized production workshops for special materials, heavy equipment, medium equipment, material preparation, sandblasting, hydrostatic testing, and acid cleaning and passivation, along with a linear accelerator testing room, a 30m×5m×5m variable volume platform gas heat treatment furnace, and other fully equipped functional areas. The company has a high level of automation and numerical control in its production and auxiliary equipment, including a 300mm cold-rolled plate machine, a 5-meter dual-axis CNC vertical lathe, dual-layer European-style cranes with 500-ton lifting capacity, heavy-duty self-propelled assembly machines, fully automatic pipe plate welding machines, CNC plasma welding machines, and CNC laser cutting machines.
