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The author considered the problem solving of control of the boiler hermeticity of railway tanks using contemporary control methods. The author described the activities and equipment which are necessary for assessment of technical state of large-volume vessels. The implementing algorithms of step-by-step operations for monitoring and analyzing the results processing are proposed. The proposed method of technical condition of the railway tanks boilers is based on the use of serial thermal imaging equipment, which allows to reduce the economic costs of monitoring and improve the working culture of the flaw inspector.

The paper describes a mathematical model of gas-dynamic movement through the through defects in the body of the boiler tank cars. The mathematical model allows to take into account the processes of gas flow at low pressure drop and the impact of the level of roughness of the inner surface of the through channel formation jet escaping gas. The comparison of the results of theoretical modeling and experimental studies of the velocity of the gas flow and temperature under different conditions. The study identified the laws of gas flow through a series of classic models through defects. Shows the dependence of the temperature of the escaping gas flow from the exhaust velocity and the level of roughness of the internal surface of the through channel, which allows us to estimate the nature of gas flow and temperature gradient. The obtained results allow to adjust the level of sensitivity to rejection temperature during thermal leakage control boilers railway tanks.

The article presents the results of experimental studies to assess the possibility of using thermal methods of controlling the leakage of the boiler of a railroad tank car. This paper reflects the research of formation of the thermal field on the outer surface of the tank in the area of end-to-end defect such as a crack, by throttling through the gas medium due to the pressure differential. Presented thermograms show the localization of the defect with a detailed description of the anomalies of the thermal fields, recorded by the imager. Also confirmed the experiments described in the work on Joule and Thomson for throttling gas through local obstacle.