Which class of fire extinguishers is typically suitable for propane/natural gas flame scenarios?

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Gas fires require extinguishers rated specifically for flammable gases. Propane and natural gas flames fall under that category, so you want a extinguisher that can handle gas fires (Class B). An extinguisher with a Class B rating is designed to suppress flames from flammable gases without spreading them. If you need coverage for multiple hazards in the same area, an ABC extinguisher is also acceptable because its rating includes B (gas) along with A and C, offering broad protection.

The other options don’t fit as well: Class A is for ordinary combustibles like wood and paper; Class C is for energized electrical fires (and doesn’t address the gas itself); Class D is for combustible metals. Therefore, the best choice is a Class B extinguisher for gas-only scenarios, or ABC if multi-hazard coverage is desired.