（一）干粉灭火系统按应用方式可分为全淹没灭火系统和局部应用灭火系统。扑救封闭空间内的火灾应采用全淹没灭火系统；扑救具体保护对象的火灾应采用局部应用灭火系统。

（1） Dry powder fire extinguishing system can be divided into total flooding fire extinguishing system and local application fire extinguishing system according to application mode. The total flooding fire extinguishing system shall be used to put out the fire in the enclosed space; Local application fire extinguishing system shall be adopted to put out the fire of specific protected objects.

（二）采用全淹没灭火系统的防护区，川消小编认为应符合下列规定：

（2） For the protection zone using the total flooding fire extinguishing system, the small editor of Sichuan Fire Fighting believes that the following requirements should be met:

（1）喷放干粉时不能自动关闭的防护区开口，其总面积不应大于该防护区总内表面积的15％，且开口不应设在底面。

(1) The total area of the protective zone opening that cannot be automatically closed when spraying dry powder shall not be greater than 15% of the total internal surface area of the protective zone, and the opening shall not be set at the bottom.

（2）防护区的围护结构及门、窗的耐火极限不应小于0.50h，吊顶的耐火极限不应小于0.25h；围护结构及门、窗的允许压力不宜小于1200Pa。

(2) The fire endurance of the enclosure, doors and windows in the protection zone shall not be less than 0.50h, and the fire endurance of the ceiling shall not be less than 0.25h; The allowable pressure of the enclosure, doors and windows should not be less than 1200Pa.

（三）采用局部应用灭火系统的保护对象，应符合下列规定：

（3） The protected objects using local application fire extinguishing system shall meet the following requirements:

（1）保护对象周围的空气流动速度不宜大于2m/s。必要时，应采取挡风措施。

(1) The air flow velocity around the protected object should not be greater than 2m/s. If necessary, wind protection measures shall be taken.

（2）在喷头和保护对象之间，喷头喷射角范围内不应有遮挡物。

(2) Between the nozzle and the protected object, there should be no obstructions within the spray angle range of the nozzle.

（3）当保护对象为可燃液体时，液面容器缘口的距离不得小于150mm。

(3) When the protection object is flammable liquid, the distance from the liquid level to the edge of the container shall not be less than 150 mm.

（四）当防护区或保护对象有可燃气体，易燃、可燃液体供应源时，启动干粉灭火系统之前或同时，必须切断气体、液体的供应源。

（4） When there are flammable gas, flammable and combustible liquid supply sources in the protection area or the protection object, the gas and liquid supply sources must be cut off before or at the same time when the dry powder fire extinguishing system is started.

（五）可燃气体，易燃、可燃液体和可熔化固体火灾宜采用碳酸氢钠干粉灭火剂；可燃固体表面火灾应采用磷酸铵盐干粉灭火剂。

（5） Sodium bicarbonate dry powder fire extinguishing agent should be used for combustible gas, flammable, combustible liquid and fusible solid fire; Ammonium phosphate dry powder extinguishing agent shall be used for combustible solid surface fire.

（六）组合分配系统的灭火剂储存量不应小于所需储存量多的一个防护区或保护对象的储存量。

（6） The storage capacity of fire extinguishing agent in the combined distribution system shall not be less than the storage capacity of a protective area or protected object with more storage capacity.

（七）组合分配系统保护的防护区与保护对象之和不得超过8个。当防护区与保护对象之和超过5个时，或者在喷放后48h内不能恢复到正常工作状态时，灭火剂应有备用量。备用量不应小于系统设计的储存量。备用量的储存容器应与系统管网相连，并能与主用干粉储存容器切换使用。更多相关内容就来我们网站http://www.cx-fire.com咨询吧！

（7） The sum of protection zones and protection objects protected by the combined distribution system shall not exceed 8. When the sum of the protected area and the protected object exceeds 5, or the fire extinguishing agent cannot be restored to the normal working state within 48 hours after the spraying, the fire extinguishing agent shall have a reserve amount. The reserve capacity shall not be less than the storage capacity designed by the system. The storage container for standby quantity shall be connected with the system pipe network and can be switched to the main dry powder storage container. Come to our website for more relevant content http://www.cx-fire.com Ask!