compressedgas

Compressed gas refers to gas stored under high pressure in a sealed container, typically a steel or aluminum cylinder. The term covers a wide range of gases, including inert, toxic, flammable, oxidizing, and noble gases. Some gases are stored primarily as compressed gas in a cylinder, while others are liquefied and kept under pressure to maintain their liquid-vapor equilibrium. Contents are identified by labels and often carry UN numbers to indicate hazards and handling requirements.

Handling and storage practices emphasize safety and containment. Cylinders should be kept upright and secured to prevent tipping, with protective caps in place when not connected. Use the appropriate regulator to reduce the cylinder pressure for equipment, and never rely on hoses or fittings not designed for the gas. Cylinders should be stored in well-ventilated areas, away from heat sources, open flames, and incompatible materials. Only trained personnel should connect or disconnect regulators, and cylinders should be moved with proper trolleys or cradles.

Hazards associated with compressed gas include high-pressure rupture or shrapnel from a damaged cylinder, as well as leaks that can displace oxygen or release toxic, flammable, or corrosive vapors. Some gases are extremely cold on release if stored as liquefied gases, posing frostbite risks. Safety data sheets and proper labeling guide risk assessment. Practices such as adequate ventilation, gas-specific PPE, and avoidance of oil or grease on fittings are commonly required.

Applications span healthcare, welding, laboratory research, and manufacturing. Common examples include oxygen for medical use, carbon dioxide for beverage carbonation, argon and helium for welding and testing, and acetylene for cutting and welding (which requires special handling). Cylinders are typically leased or owned by organizations and subject to periodic requalification and inspection.