Industrial gases refer to oxygen, nitrogen, argon, neon, helium, krypton, xenon, hydrogen, carbon dioxide, acetylene, natural gas, etc. Because these gases have inherent physical and chemical properties, they play a pivotal role in the national economy, and the promotion and application speed is very fast, almost penetrating into all walks of life. The nitrogen machine. The traditional industries with the largest amount of industrial gases are: steelmaking, iron making, nonferrous metal smelting, fertilizer production, ethylene, acrylic, polyvinyl chloride, man-made fibers, synthetic fibers, silicone rubber products, cables and synthetic leather, petrochemical industry, welding in the machinery industry, metal heat treatment, helium leakage, float glass production. As these traditional industries have developed rapidly in recent years, the use of industrial gases has also reached a peak.