Release:2017, Vol. 3. №3
About the authors:Denis B. Chapaev, Cand. Sci. (Tech.), Associate Professor, Department of Heat and Gas Supply and Ventilation, Novosibirsk State University of Architecture and Civil Engineering; firstname.lastname@example.org
The main reason for the destruction of the linear part of the thermal energy systems is the corrosion wear of metal pipes. Lately, in connection with the application of hermetic heat-insulating constructions of pipelines (from the outdoor side of the tube), their residual resource is often determined by the corrosion wear on the “unprotected” indoor side of the tube, and estimating its rate is critical for predicting the emergency situations and planning repairs of the linear part of the system.
This article considers the method of calculating the service life of thermal pipelines trans-porting high-temperature water accounting for the intensity of internal corrosion wear, as well as provides results of the calculation on it. The method is applicable to pipes made of carbon structural steel, and to the case of normative oxygen concentration in the heat medium. The authors present dependencies of deep indicator of internal corrosion wear of the pipe and its service life on pH and temperature of the heat medium. Furthermore, they provide the calculated dependencies of the solubility of magnetite in the thermal grid water.