Gas Cylinder Colour Codes
Gas Cylinder Colour Code Chart
The gas cylinder colour code is indicative of the gas contained in the cylinder. The gas cylinder colour code system is designed to provide an instant visual cue identifying the contents for practical and safety reasons.
For example, without the cylinder colour code someone could accidentally misidentify a cylinder and give a medical patient an inert gas instead of oxygen, which could cause Inert Gas Asphyxiation. Breathing any inert gas, like helium (Brown), nitrogen (Pewter) or argon (Peacock Blue), creates a dangerous absence of oxygen. This could even be fatal. The gas cylinder colour codehelps prevent this.
The gas cylinder colour codes also help prevent fuel gas (like acetylene) accidents that could result in fire or explosion.

Gas Cylinder Colour Codes for Australia |
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Carbon Dioxide gas cylinder colour code is: Green Grey |
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Nitrogen gas cylinder colour code is: Pewter |
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Argon gas cylinder colour code is: Peacock Blue |
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Helium gas cylinder colour code is: Brown |
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LPG gas cylinder colour code is: Silver or Grey |
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Acetylene gas cylinder colour code is: Claret |
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Hydrogen gas cylinder colour code is: Signal Red |
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Oxygen gas cylinder colour code is: Black |
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This chart shows the Australian standard gas cylinder color code and gas characteristics for gas cylinders:
Major Hazard | Gas |
Gas Cylinder Colour Code |
Characteristics |
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Asphyxiant | Carbon Dioxide |
Gas Cylinder Colour Code Green Grey AS No.N32
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Asphyxiant | Nitrogen |
Gas Cylinder Colour Code Pewter AS No.N63
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Asphyxiant | Argon |
Gas Cylinder Colour Code Peacock Blue AS No.T53
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Asphyxiant | Helium Balloon Gas |
Gas Cylinder Colour Code Brown AS No.X54
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Flamable Extremely Hazardous |
LPG |
Gas Cylinder Colour Code Silver, grey or galvanised
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Flamable Extremely Hazardous |
Acetylene |
Gas Cylinder Colour Code Claret AS No.R55
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Flamable Extremely Hazardous |
Hydrogen |
Gas Cylinder Colour Code Signal Red AS No.R13
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Oxidising Strongly supports and accelerates a flame or fire. |
Oxygen |
Gas Cylinder Colour Code Black AS No.N61
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