ABOUT PRACTICE PARAMETRIZATION PORTABLE POWDER EXTINGUISHERS (Analytical review)

The article is devoted to the typing of domestic and foreign portable dry powder fire extinguishers, by weight of fire extinguishing powder and extinguishing ability. From the results of the analysis should be no connection between the mass of fire extinguishing agent and fire extinguishing capability for fires of classes A and B not only within the same size fire extinguisher, but between different types. This is indicated, for example, the following facts:
fire extinguishing ability of individual sizes of domestic fire extinguishers much lower than the corresponding foreign counterparts;
the mass of the charge and fire extinguishing ability of domestic and foreign models of fire extinguishers each other poorly connected. From the above it follows that for typing extinguishers most the fire extinguishing ability, characterized by an area of the model fire that class and rank, is striking feature. From the analysis of the characteristics of model fires of classes A and B its follows that they do not meet the basic series of preferred numbers as in rank, and in the fire area. Besides differentiation of model fire of classes Aand B is not consistent, because model fire of class Aonly 8, and class B — 15. Based on the results of the analysis of characteristics of portable dry powder fire extinguishers, we can draw the following conclusions:
mass of the charge can not be used as an object of parameterization;
domestic powder extinguishers significantly inferior to their foreign counterparts in efficiency;
model fire of class Athe relevant requirements of the ISO and Standards are not consistent with the parameterization and do not reflect the characteristics of the corresponding model fire;
the number of ranks model fire of class A grades must match the number of class B;
to determine the effectiveness of fire extinguishers must enter a single number, the value of which will be intuitive to the user.