Gas fire extinguishing system mainly includes high and low pressure carbon dioxide, heptafluoropropane, trifluoromethane, nitrogen, IG54 1, IG55 and other fire extinguishing systems. Gas fire extinguishing agents are not conductive and generally do not cause secondary pollution. It is a good fire extinguishing agent to extinguish the information carrier of paper, silk or magnetic media materials such as electronic equipment, precision instruments and equipment, valuable instruments and archives books. The gas fire extinguishing system has a good fire extinguishing effect in a closed space, but the system investment is high, and it only needs to be installed in some important computer rooms, expensive equipment rooms, treasure rooms and archives rooms.

The following places should be equipped with automatic fire extinguishing system, and gas fire extinguishing system should be adopted:

(1) 1 10,000 national, provincial or city radio and television transmission towers with a population of over 10,000, including microwave room, meter room, watt-hour meter room, power distribution room and uninterruptible power supply (UPS) room.

(2) Long-distance program-controlled exchange rooms, control rooms and signaling transfer point rooms of international telecommunication bureaus, regional centers, provincial centers and regional centers with more than 10,000 routes.

(3) SPC exchange room, control room and signaling transfer point room of local telephone tandem office with more than 20,000 lines and local telephone terminal office with more than 60,000 lines.

(4) Communication rooms and control rooms at or above the bureau level of the central and provincial public security, disaster prevention and electric power dispatching command centers.

(5) Recording magnetic (paper) media libraries in the main computer room and basic workshop in the computer room of Grade A and B electronic information systems.

(6) Audio-visual products warehouses with the construction area of central and provincial radio and television centers not less than 120m2.

(7) National, provincial or special library collections with a collection of more than 6,543,800 copies; Treasures and non-paper files of the central and provincial archives; Treasures in large and medium-sized museums; First-class paper and silk cultural relics showroom.

(8) Other special and important equipment rooms.

Note: 1. The water mist fire extinguishing system can be used in the parts specified in paragraphs 1, 4, 5 and 8 of this article.

2. When there are spare hosts and spare recording magnetic (paper) media, which are set in different buildings or different fire zones of the same building, the pre-action automatic sprinkler system can be used in the parts specified in paragraph 5 of this article.