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The maximum discharge time permitted for halocarbon clean agent systems is
The maximum discharge time permitted for halocarbon clean agent systems is 10 seconds. This is the requirement of NFPA 2001, which is the standard for clean agent fire extinguishing systems. NFPA 2001 states that the discharge time for halocarbon agents shall not exceed 10 seconds, unless otherwise permitted by the authority having jurisdiction1. Halocarbon agents are synthetic compounds that contain carbon, fluorine, and sometimes other elements, such as hydrogen, chlorine, or bromine. Examples of halocarbon agents include HFC-227ea, HFC-125, and FK-5-1-122. Halocarbon agents work by absorbing heat and interrupting the chemical chain reaction of the fire. They are electrically nonconductive and leave no residue upon evaporation3. Halocarbon agents are suitable for protecting Class A, B, and C fires involving electrical equipment, flammable liquids, and ordinary combustibles4. The discharge time is the time required to release the agent from the storage containers to the protected enclosure. A short discharge time is important to achieve the design concentration of the agent before the fire grows or spreads5. Reference:
NFPA 2001: Standard on Clean Agent Fire Extinguishing Systems
Clean Agent System Basics | NFPA
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