The color yellow is used to identify natural gas.

The color yellow is used to identify natural gas.

• A. True
• B. False
• C. Only for steel pipe
• D. Only for residential use

Answer: (A)

Using color to identify piping helps everyone quickly recognize what system a line carries, reducing the chance of mistakes during installation, maintenance, or emergencies. Yellow is the standard color used to identify natural gas piping, so seeing yellow signals that the line carries natural gas and should be treated with caution. This identification applies regardless of pipe material (steel, copper, plastic) or whether the installation is residential or commercial. Other systems use different colors, so the yellow cue specifically points to natural gas.

Using color to identify piping helps everyone quickly recognize what system a line carries, reducing the chance of mistakes during installation, maintenance, or emergencies. Yellow is the standard color used to identify natural gas piping, so seeing yellow signals that the line carries natural gas and should be treated with caution. This identification applies regardless of pipe material (steel, copper, plastic) or whether the installation is residential or commercial. Other systems use different colors, so the yellow cue specifically points to natural gas.