Standard for Installation of Fire Safety Devices based on Use and Occupancy Article 82

Any of the following spraying patterns may be selected for carbon dioxide fire extinguishing systems pursuant to actual requirements:1.Total flooding: in areas separated by wall, column, slab or ceiling made of nonflammable materials, quantity and location of sprinkler heads and the spraying amount shall be capable of ensuring effective fire extinguishment pursuant to the volume of the portion and characteristics of the protected objects. The opening shall be equipped with an automatic closing device unless the leakage at the opening can be made up effectively.2.Local area spraying: sprinkler heads shall be allocated pursuant to the shape, construction, quantity and property of the protected objects, and the number, location and spraying volume of nozzles shall be capable of ensuring effective fire extinguishment.3.Movable application: The horizontal distance from the hose connector to any part of the protected subject shall be no more than 15m.By agent type, Inert Gas Fire Extinguishing systems include Nitrogen (here-after referred to as IG-100); Argon (hereafter referred to as IG-01); 50-50 Nitrogen-Argon Mixture (hereafter referred to as IG-55); and 52-40-8 Ni-trogen-Argon-CO2 mixture (hereafter referred to as IG-541).Inert Gas Fire Extinguishing systems are limited to total flooding only; the device is applicable to the specifications of Subparagraph 1 of Paragraph 1 in the text. Opening of the protected area shall be provided with an auto-matic closing device, and the opening shall be automatically closed prior to discharging the agent.