Оценка пожарной опасности дыхательных аппаратов с химически связанным кислородом

Abstract

The calculation of increase of the oxygen volume fraction escaped in the envi-ronment through a relief valve of breathing apparatus, chemical oxygen type, i.e. the PX-4 self-contained breathing apparatus and the ШСС-1 self-contained self-rescuers, is carried out. The maximum increase of the oxygen volume fraction by hard work with the breathing apparatus on makes no more than 2.5 %, what is evidence of the full safety of use of those apparatus in a fire-hazardous atmosphere.