IS-2379 Color Codes for Medical Gases

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Gas Ground Color Code First Color Band Second Color Band
Air Sky Blue White Black
Cyclopropane Canary Yellow Light Orange
Carbon Dioxide Canary Yellow Light Grey
Ethylene Canary Yellow Dark Yellow Signal Red
Helium Canary Yellow Light Brown
Oxygen Canary Yellow White
Oxygen and Carbon Dioxide Mixture Canary Yellow White Light Grey
Oxygen and Helium Mixture Canary Yellow White Light Brown
Nitrous Oxide Canary Yellow French Blue Signal Red
Nitrogen Canary Yellow Black
Vacuum Sky Blue Black