FIELD: security means.SUBSTANCE: invention relates to industrial safety of hazardous production facilities applied to the determination of the range of thermal radiation propagation in the event of accidents on pipelines with compressed gas circulation. When implementing the method, the type of fluid and the initial parameters of gas in the pipeline before depressurization are determined: the effective diameter of a gas source – d; initial gas pressure in an emergency element – P(MPa); atmospheric pressure (MPa) – P; gas adiabat index – k≈1.4; depending on the type of fluid in the pipeline, the values that determine the size and shape of the flame of a supersonic jet complex W. are set at each point A(x,y) to visualize the propagation of the radiant energy flux during flare combustion of a supersonic jet of natural gas, the heat flux values q(x,y) are determined and are represented as contour lines with a constant heat flux q(x,y)=const. Resulting contours of the heat flux are used to determine the
