Since 1956 China began to have an air separation equipment manufacturing industry, and constantly meet the growing demand for industrial gases from all walks of life, in view of the then poor technology and manufacturing capacity of gas separation equipment manufacturing products, many departments rely on imported equipment to develop the national economy, in the 1950s and 1960s China mainly imported oxygen generators for the former Soviet Union and Eastern European countries, imported equipment specifications for 150, 800, 1000, 3350m³/h and other sizes of small and medium-sized air separation equipment. 800, 1000, 3350m³/h and other sizes of small and medium-sized air separation equipment, the late seventies began to import larger quantities of Japanese air separation equipment, specifications of 3200, 6000m³/h, etc., mainly for metallurgical industry development of steel.
After the reform and opening up, China on the one hand introduced technology to rapidly improve the design and manufacturing level of gas separation manufacturing industry, on the other hand, also began to import Linde, French liquid air equipment, of which the metallurgical industry imports to 10,000m³/h air separation equipment, fertilizer industry imports to 28,000m³/h, and later expanded to 10,000m³/h and above grade air separation equipment, small and medium-sized air separation is mainly imported BOC, to the late 1980s, due to China's manufacturing level level and capacity growth, Japan and the former Soviet Union's equipment basically withdrew from the Chinese market.
