Циркулярное письмо MSC.1/Circ.1270. Revised guidelines for the approval of fixed aerosol fire-extinguishing systems equivalent to fixed gas fire-extinguishing systems, as referred to in SOLAS-74, for machinery spaces

Fixed aerosol fire-extinguishing systems for use in machinery spaces of category A equivalent to fire-extinguishing systems required by SOLAS regulation II-2/10.5 should prove that they have the same reliability which has been identified as significant for the performance of fixed gas fire-extinguishing systems approved under the requirements of the International Code for Fire Safety Systems (FSS Code), chapter 5. In addition, the system should be shown, by testing according to appendix 1 to these Guidelines, to have the capability of extinguishing a variety of fires that can occur in machinery spaces. 2 Aerosol fire-extinguishing systems involve the release of a chemical agent to extinguish a fire by interruption of the process of the fire. There are two methods considered for applying the aerosol agent to the protected space: .1 condensed aerosols are created in pyrotechnical generators through the combustion of the agent charge; and .2 dispersed aerosols that are not pyrotechnically generated and are stored in containers with carrier agents (such as inert gases or halocarbon agents) with the aerosol released in the space through valves, pipes and nozzles.<