Basis of experimental determination of the strength of the working fluids

There were examined factors and consequences of reducing of strength of working fluid. The research contains a brief analytical survey of theoretical and experimental works that are devoted to description of cavitation effect and investigation of its first stage which is carried out in production of discontinuity flaw in the form of gas (steam and gas) bubble. The results of the own researches are elucidated and analyzed in this work. The emphasis is devoted to the methods of experiments’ setting.