By agent type, Halocarbon Clean Agent Fire Extinguishing Systems include Trifluoromethane (hereafter, HFC-23), Heptafluoropropane (hereafter, HFC-227ea), and Perfluoro(2-methyl-3-pentanone) (hereafter, FK-5-1-12).
The spray pattern of Halocarbon Clean Agent Fire Extinguishing Systems is limited to total flooding. Automatic closing and ventilation of the protected area shall be provided pursuant to Article 82, Paragraph 1, Subparagraph 1, Paragraph 3 and Article 85 specifications.
In addition to the above regulation, measures shall be taken to prevent pres-sure rise inside the protected area. This is exempted if the integrity of the protected area is not affected.

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• Article 97-2.pdf

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• Article 97-3.pdf

Nozzles of Halocarbon Clean Agent Fire Extinguishing Systems shall be equipped pursuant to the following provisions:
1.The nozzles shall be capable of quickly spraying the agent and evenly distributing it throughout the protected area.
2.Discharge pressure of nozzle shall be at least 9kg/cm2 or 0.9Mpa for HFC-23, at least 3 kg/cm2 or 0.3Mpa for HFC-227ea or FK-5-1-12, unless otherwise approved by central authorities.
3.Quantity and type of nozzles shall be determined according to flow calculation.
Dosage of fire extinguishing agent calculated per the above Article shall be sprayed out at least 95% within 10 seconds.

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• Article 97-5.pdf

Piping of Halocarbon Clean Agent Fire Extinguishing Systems shall be installed according to the following regulations:
1.The piping shall be exclusive, and the diameter shall be determined using flow calculation.
2.Head drop between the lowest piping and highest piping shall be determined according to flow calculation and shall be less than 50m.
3.When steel piping is used, seamless steel pipe conforming to CNS 4626 with at least Sch80 thickness shall be used for HFC-23 systems; seamless steel pipe conforming to CNS 4626 with Sch40 or higher thickness or equivalent strength shall be used for HFC-227ea and FK-5-1-12 systems; piping shall be galvanized or treated for corrosion prevention.
4.When copper piping is employed, seamless copper or copper alloy pipes conforming to CNS 5127 specifications or those having equivalent or higher strength and corrosion resistance shall be used
5.Piping connectors and valves shall be endurable to at least the internal pressure intensity and be provided with proper anti-corrosion treatment

Gas actuate Halocarbon Clean Agent Fire Extinguishing Systems are applicable to Article 88 regulations.
Selection switch, actuation device, audio alarm device, safety device and exhaust device of Halocarbon Clean Agent Fire Extinguishing Systems are applicable to provisions of Article 90 to Article 92, Article 93, Paragraph 2, and Article 94.

Emergency Power Supply of Halocarbon Clean Agent Fire Extinguishing Systems shall be provided according to Article 95 provisions.

Enclosure Integrity Test shall be performed on completion of the protected area of Halocarbon Clean Agent Fire Extinguishing Systems. Pass criterion: at least 85% Design Concentration of agent is maintained within 10 minutes of agent discharge.

Labeling specifications of the Halocarbon Clean Agent Fire Extinguishing System will be further specified by central authorities.