To what regulatory standard does a yellow tag refer?

The yellow tag refers to UL Standard 300, which is a crucial regulatory standard specifically pertaining to fire extinguishers and their classifications for kitchen and commercial cooking areas. This standard outlines performance criteria for fire extinguishing agents used in environments with cooking equipment that may produce grease-laden flammable vapors.

Under this standard, fire extinguishers are tested and rated based on their effectiveness against Class K fires, which involve cooking oils and fats. The yellow tag serves as an indicator that the extinguisher has been certified to meet these rigorous standards, ensuring that it is equipped to handle potential kitchen fires effectively.

In contrast, the other standards mentioned do not specifically relate to the requirements for fire extinguishers in commercial cooking environments. UL Standard 200 deals with fire safety for other applications, NFPA Standard 50 addresses storage and handling of compressed gases, and ISO Standard 9001 pertains to quality management systems rather than fire safety equipment.