(1) The upstream of air separation equipment manufacturing industry related to upstream industry is mainly raw materials and components such as steel, aluminum, air compressor, supercharger, adsorption tank, screw machine, cold drying machine, control panel, filter, sensor, automatic control valve, molecular sieve, packing, among which sub sieve and adsorption film are the unique components of air separation equipment manufacturing industry, The adsorption tank and oil filter are custom-made components, and the rest are general mechanical equipment parts. At present, the manufacturing industry of molecular sieve and adsorption membrane in China is mature, and there are many manufacturers who can undertake customized adsorption tanks and oil filters. The competition momentum of aluminum, steel and other metal materials and other parts is growing.

In general, the product renewal and technology upgrading of upstream industry can promote the technological development of air equipment manufacturing industry to some extent. The upstream industry is mature, the market competition is also sufficient, and the demand of the industry is stable and sufficient. Therefore, air equipment manufacturing benefits from the development of upstream industry, but the upstream industry is not dependent.

(2) The relationship with downstream industries is the downstream of air separation equipment manufacturing industry. The downstream of air separation equipment manufacturing industry is an enterprise with application demand for nitrogen, oxygen, various rare gases and other industrial gases in many fields of national economy, such as metallurgy, petrochemical, chemical industry, chemical fertilizer, new energy, universe, medical treatment, electronics, machinery, food, metal heat treatment, etc. The air separation equipment manufacturing industry has a high correlation with the downstream industry, and the downstream industry has a strong traction and driving role in the development of the industry. In recent years, the Chinese government has formulated a series of industrial revitalization plans, vigorously promoting industrial restructuring and industrial structure optimization and upgrading, which greatly promotes the development of downstream industries such as metallurgy, coal and power. In the next few years, the merger and integration of these downstream industries will continue, and the elimination of backward production capacity will continue to be promoted, and the industrial structure will be further optimized; Coal chemical industry, new energy, electronics, medical treatment, universe and other industries will continue to develop rapidly; The reform and development of these downstream industries will greatly promote the application scope and depth of air separation equipment, thus bringing stable market demand to the air separation equipment manufacturing industry.

Air separation equipment is widely used in many fields of China's national economy. The gas products such as nitrogen, oxygen and argon can play the role of explosion-proof, anti-combustion, oxidation prevention and combustion supporting, and provide efficient and reliable guarantee for safety production, energy saving consumption and life treatment in various fields.