Each industrial plant, bulk plant and distributing point must be provided with one fire extinguisher having a minimum capacity of _________ with a B:C rating?

In the NFPA 58 code regarding the fire safety requirements for industrial plants, bulk plants, and distribution points, the specification for fire extinguishers is critical for ensuring adequate response to potential fire hazards, particularly those associated with liquefied petroleum gas (LPG). The requirement for a fire extinguisher with a B:C rating specifically indicates that the extinguisher is designed to handle fires involving flammable liquids (Class B) and electrical fires (Class C).

The minimum capacity of 18 pounds is established to ensure that adequate firefighting capability is available in environments where larger fuel loads are present, as is common in industrial settings. An extinguisher of this size provides a sufficient volume of extinguishing agent to effectively handle significant class B fires, which are the most likely to occur in situations involving LPG.

In contrast, smaller extinguisher capacities may not provide enough agent to extinguish larger fires or may deplete too quickly in an emergency situation, while larger capacities, while potentially effective, may not be required or practical in all locations. Therefore, the specification for a minimum of 18 pounds aligns with safety protocols to ensure that personnel have the necessary tools to respond effectively to fires in environments where LPG is handled and stored.