Compressed Gases

Compressed gases can be hazardous because each cylinder contains large amounts of energy and may have high flammability and toxicity potential.

Labeling of Compressed Gases

Flammable Gas

Example: Hydrogen, Acetylene

Non-flammable Gas

Example: Argon, Nitrogen, Helium

Poisonous Gas

Example: Hydrogen Chloride, Carbon Monoxide, Sulfur Dioxide

Oxygen Containing Gas

Chlorine Gas

General Guidelines:

• Know the contents of the cylinder and be familiar with the properties of the gas.
• The contents of the cylinder or compressed gas should be clearly marked and identified with proper labels or tags on the shoulder of the cylinder. Those cylinders or compressed gases that do not comply with identification requirements should be returned to the manufacturer.
• If two labels are associated with one cylinder, affix the labels 180° apart on the shoulder of each cylinder. Label all empty cylinders EMPTY or MT and date the tag.
• All regulators, gauges, valves, manifolds, must be designed for the particular pressures and gases involved. They should bear the inspection seal of either Underwriters' Laboratories (UL) or Factory Mutual Engineering Division of Associated Factory Mutual Fire Insurance Companies (FM).

Storage and Handling of Compressed Gases:

• All cylinders should be stored in cool, dry, well-ventilated surroundings and away from all flammable substances including oil, greases, and gasoline. DO NOT subject any part of a cylinder to a temperature higher than 125 °F.
• Cylinders should not be located where objects may strike or fall on them.
• Cylinders should not be stored in damp areas, or near salt, corrosive chemicals, fumes, heat, or direct sunlight. Store cylinders by gas type, separating oxidizing gases from flammable gases.
• All cylinders and compressed gases (full or empty) should be properly fastened and supported by straps, belts, buckles, or chains to prevent them from falling and causing bodily harm. A maximum of two cylinders per restraint is recommended.
  
  
  
  DO NOT SMOKE
  in areas where there are compressed
  gases being used or stored.
  
  
• DO NOT extinguish a flame caused by a gas until the gas source has been shut off.
• A cylinder should only be moved while strapped to a wheel cart to ensure stability. When storing or moving cylinders, always attach valve safety caps.
• DO NOT heat the cylinder or place a cylinder where it may become part of an electrical circuit. Compressed gases must be handled as high-energy sources and dangerous projectiles.
• All cylinders should be checked for damage prior to use. DO NOT repair damaged cylinders yourself. Damaged or defective cylinders, valves, etc., must be taken out of use immediately and returned to the manufacturer for repair.
• Each regulator valve should be inspected annually. Never force valve or regulator connections. Threads and the configuration of valve outlets are different for each family of gases to prevent mixing of incompatible gases.
• DO NOT use lubrication on valve regulators.