Read in №10 of 2020 year "Modern Regulatory Requirements for Gas Fire Extinguishing to Improve the Safety of Facilities"

19 окт 2020


To implement the technical regulations of the Eurasian Economic Union «On the requirements for fire safety and fire extinguishing equipment» (TR EAEU 043/2017), modern regulatory requirements were developed based on the advanced domestic and foreign research in order to increase the efficiency of using automatic gas fire extinguishing installations.
The domestic methodology of experimental determination of the gas extinguishing concentration in the fire chamber has a number of advantages in comparison with the foreign analogues. It is established that it is necessary to take into account the conditions of fire experience for the selection of equipment for a fire extinguishing installation with FK-5-1-12 in the process of its design, in order to ensure more complete evaporation of the liquid phase of FK-5-1-12 after leaving the nozzles.
An assumption was substantiated that allows setting the normative concentration of fire extinguishing gases at the level of heptane without conducting a fire experiment to extinguish fires of flammable liquids with a flash point of more than 61 оC. In this case, the concentration value can be taken 15 % less than according to the requirements of ISO 12854: 2009.
Experimental studies on extinguishing smoldering materials with gases were conducted. It was established that nitrogen, CO2, freons 114B2 and 227ea at a concentration for extinguishing heptane eliminate not only flame combustion, but also smoldering if the free combustion time does not exceed 3 min. With free combustion for more than 6 minutes, reliable suppression of smoldering is achieved when the oxygen content in the volume of the fire chamber is up to 2.5 % vol.  The results of the experiments were taken into account in the draft norms for the design of fire extinguishing installations.
Additional requirements were developed for gas fire extinguishing containers and selector valves, which will make it possible to exclude the use of low-quality or obsolete products as part of gas fire extinguishing installations in the territory of the Eurasian Economic Union.
The developed modern requirements are included in the drafts of new regulatory documents, which were publicly discussed, and are at the approval stage.

Authors:
  • D.V. Bukhtoyarov
    D.V. Bukhtoyarov
    Cand. Sci. (Eng.), Deputy Head of the Department FGBU VNIIPO of EMERCOM of Russia, Balashikha, Russia
  • N.V. Smirnov
    N.V. Smirnov
    Cand. Sci. (Eng.), Lead Researcher, FGBU VNIIPO of EMERCOM of Russia, Balashikha, Russia Cand. Sci. (Eng.), Lead Researcher, netsend@yandex.ru
  • A.V. Kazakov
    A.V. Kazakov
    Cand. Sci. (Eng.), Department Head FGBU VNIIPO of EMERCOM of Russia, Balashikha, Russia