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Gas Cylinder Colour Code Chart for Australia

Gas Cylinder Colour Code Chart

Gas Cylinder Colour Codes
Gas Cylinder Colour
Carbon Dioxide Green Grey
Nitrogen Pewter
Argon Peacock Blue
Helium Brown
LPG Silver or Grey
Acetylene Claret
Hydrogen Signal Red
Oxygen Black

This chart shows the Australian standard colour coding and gas characteristics for gas cylinders:

Major Hazard Gas Cylinder Colour Characteristics
Asphyxiant Carbon Dioxide

Green Grey AS No.N32

  • Can cause the nose to sting.
  • Will collect in ducts, drains and low lying areas e.g. cellars.
  • At high concentrations, instant unconsciousness may occur followed by death.
  • Much heavier than air.
Asphyxiant Nitrogen

Pewter AS No.N63

  • Odourless.
  • No warning signs before unconsciousness occurs.
  • At high concentrations, instant unconsciousness may occur followed by death.
  • Heavier than air.
  • Does not burn.
  • Largely Inert.
Asphyxiant Argon

Peacock Blue AS No.T53

  • Odourless.
  • No warning signs before unconsciousness occurs.
  • At high concentrations, instant unconsciousness may occur followed by death.
  • Heavier than air.
  • Does not burn.
  • Inert.
Asphyxiant Helium Balloon Gas

Brown AS No.X54

  • Inert but asphyxiant at high concentrations - lighter than air.
  • DO NOT INHALE UNDER ANY CIRCUMSTANCES.
Flamable
Extremely Hazardous
LPG

Silver, grey or galvanised

  • LPG is 'stenched' (odourised) and has a distinctive odour.
  • It will ignite and burn instantly from a spark or piece of hot metal.
  • Is heavier than air and will collect in ducts, drains etc., and low lying areas.
  • Fire and explosion hazard.
  • Highly flammable.
  • Eliminate all ignition sources.
Flamable
Extremely Hazardous
Acetylene

Claret AS No.R55

  • Distinctive garlic smell.
  • Fire and explosion hazards are greater than LPG but it is slightly lighter than air and less likely to collect in ducts and drains.
  • Requires minimal energy to ignite in air or oxygen.
  • Do not use with copper, high copper or brass alloys because copper materials form explosive compounds with Acetylene.
Flamable
Extremely Hazardous
Hydrogen

Signal Red AS No.R13

  • Odourless.
  • Much lighter than air.
  • Will collect at the highest point in any enclosed space unless ventilated at high level. Invisble flame.
  • Fire and explosion hazard.
  • Very low ignition energy.
  • Burns with an invisible flame.
Oxidising
Strongly supports and
accelerates a flame or fire.
Oxygen

Black AS No.N61

  • Odourless.
  • Generally considered non-toxic at atmospheric pressure.
  • Will not burn, but supports and accelerates combustion.
  • Materials not normally considered combustible may be ignited by sparks in oxygen rich atmospheres.
  • No oil, grease or lubricants should come into contact with oxygen.

 

 

 
 

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