Water mist fire protection general specification for self. It was initially designed to offer fire protection for large cruise ships but is now widely applied in. Water mist systems garnished more interest in the early 1990s, following the international adoption of the montreal protocol. Supply and install a hifog water mist fire protection system to protect gas machinery type spaces where class b combustibles offer a fire hazard. Fire control and suppression by watermist systems bentham open.
As name suggest water mist system fights fire by cooling down the fire with the help of very fine water droplets also called hyper mist. A water mist system is a fixed fire protection system, comprising components for automatic. It is apparent that when water mist systems are being. This only occurs directly at the fire source, meaning there is no danger to people escaping from the fire due to a lack of oxygen. Msc guidelines for watermist fire suppression systems. Water mist system is a unique fire fighting system. Maritime safety committee circular 9, guidelines for the a pproval of fixed water based local application fire fighting systems for use in category a machinery spaces e. Publications listed below form part of specification to the extent referenced.
The watermist fire suppression systems are an excellent alternative to halon fire. Quality requirements for water mist fire protection systems. First water mist nozzles were developed in the early 90s mainly at sp in sweden. This fire suppression solution can be applied as a total flooding system, local application fire fighting system laff and for accommodation areas.
General specification for self contained system rev 0 page 3 of 15 water mist fire protection part 1 general 1. The hifog water mist system is a fire protection system which uses very fine water sprays. Protection of means of escape and firefighting access. Hence, water mist must be evaluated in the context of a system, and not just as an extinguishing agent. Acceptance of fixed fire protection systems is based upon selecting a system or equipment. Publications are referenced in text by basic designation only. Although fine sprays were known to be effective, the first significant work involving water mist systems was conducted by ul in 2.
When halon suppression systems were deemed environmentally unsafe in 1995, watermist systems became the leading candidate for replacement. The capability of the system to fight both class a and class b fires was. The system was initially developed for protection of lumber drying kilns and later for use on ships. The results showed that water mist spray can extinguish the fire effectively under 5 minutes, with 7 bar system pressure as the fastest. By dispersing water at high pressure through speciallydesigned nozzles, water is forced. Water mist fire suppression design notes free pdf mep work. When halon suppression systems were deemed environmentally unsafe in 1995, water mist systems became the leading candidate for replacement. Pressure water mist systems for the hazard being protected. When extinguishing a fire, water mist produces a higher rate of heat extraction and at the same time uses less water. A form of water mist system was originally used in the 1930s in industrial applications for asset protection.
As a result, the water mist systems are particularly effective and require only very small quantities of water, meaning the system components, including pipes and pumps, have a very small overall construction size. The most innovative fire fighting technology available. As well as cooling the fire like a traditional sprinkler, it simultaneously starves the fire of oxygen like. The novenco fire fighting nff xflow water mist system gives you the opportunity to integrate local and full fire protection in a single system. Water mist has a central advantage over the conventional water jet, in that the mist can penetrate everywhere and thus cool and extinguish very efficiently. References appendix a checklist and proforma for a water mist system assessment. The qrs includes definition of a conformity assessment system cas which specifies standardized.
The system discharges a very fine water mist as a highpressure fog, which as such blocks radiant heat and absorbs. Pdf the progress on the research and application of water mist systems in. Chapter 7, fixed water spraying and water mist fire extinguishing systems d. Provide systems complete, workable, and ready for operation. Water mist fire fighting system has been discussed in this article and we will study that in detail. Water mist fire fighting system tanktech pdf catalogs. The ceiling mounted system then discharges water mist directly into the room to suppress and extinguish the fire. The system shall be of the high pressure type, single tubing and the water application. In the last decade, water mist came to prominence for fire protection use on. On different ships, you have might have water mist or hyper mist.
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