Cylinder Colors

While the cylinder label is the primary means of identifying the properties of the gas in a cylinder, the colour coding of the cylinder itself, can often time provide a further guide.

Cylinder Shoulder - European Standard Color Coding
The color applied to the shoulder, or curved part, at the top of the cylinder signifies the European standard color coding that has recently come into force. The aim of the standard (EN 1089-3), which has replaced the old cylinder colour scheme (BS349), is to help improve safety standards within the gases industry.

A number of gases have been assigned a specific colour and some of these are shown below:

compressed gas cylinder colors

Cylinder Body - BOC Colour Coding

The colour of the body of the cylinder may differ for the same gas among different gas companies. The BOC cylinder body colours are displayed below:

compressed gas cylinder colors2

Please Note:

  • Variation in monitor colour settings may impact colours displayed.
  • Cylinder colors are a guide ONLY. Labels MUST be used as the primary means of identification cylinder content.
  • For more detail on cylinder identification, colour coding and labelling standards under the new European cylinder color coding system, visit the British Compressed Gases Association website.

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