The cylinder label is the primary means of identifying the properties of a gas in a cylinder. The cylinder’s colour coding, however, provides a further guide to content.
Most important colours
Poisonous and/or corrosive gases | Yellow |
Combustible gases | Red |
Oxidising gases | Light blue |
Inert gases | Light green |
Pure Gases
Acetylene | Maroon |
Oxygen | White |
Argon | Dark green |
Nitrogen | Black |
Carbon dioxide | Grey |
Helium | Brown |
Hydrogen | Red |
Nitrous oxide | Blue |
Linde cylinder colours
Industrial gases | Black |
Acetylene | Maroon |
Food gases | Green |
Specialty gases | Silver grey |
Medical gases | White |