Carbon dioxide extinguishing systems are identified by bands of which color?

Carbon dioxide extinguishing systems are identified by bands of which color?

• A. Black
• B. White
• C. Green
• D. Orange

Answer: (A)

Color coding on extinguishing-system components helps workers quickly identify the agent and its hazards. For carbon dioxide systems, a black band is used to mark pipes, valves, and equipment so the system is immediately recognized as CO2. This distinction matters because CO2 behaves very differently from other agents and poses asphyxiation risks, so clear visual identification reduces the chance of wrong actions during operation or maintenance and supports proper safety measures. Other extinguishing agents have different color conventions, so the black band is the standard identifier for CO2.

Color coding on extinguishing-system components helps workers quickly identify the agent and its hazards. For carbon dioxide systems, a black band is used to mark pipes, valves, and equipment so the system is immediately recognized as CO2. This distinction matters because CO2 behaves very differently from other agents and poses asphyxiation risks, so clear visual identification reduces the chance of wrong actions during operation or maintenance and supports proper safety measures. Other extinguishing agents have different color conventions, so the black band is the standard identifier for CO2.