Corrosion of internal steel surfaces in the heat supply network. Analysis and detection methods

Abstract

Heat supply networks in Tyumen region are characterized by a high damage rate, and as a result increase heat losses and reduce operating efficiency of heat supply networks. Reducing the reliability of heating networks increases the cost for their operation, for the elimination of the consequences of accidents and the restoration of the urban environment. The authors of this article consider that the cause of increased pipeline failure is internal corrosion damage and its consequences, detected in the operation at the resource supply company in Tobolsk during the heating periods of 2018-2022. An analysis of the source of the internal corrosion appearance on steel pipelines of different diameters and different types of laying was carried out, an attempt to determine the correlation between external corrosion layer and internal one was made, the influence of the oxygen content in the heat transfer fluid was taken into account. During preparing the article, different variants to minimize the corrosion damage of the internal pipeline surface and to reduce the level of oxygen dissolved in the aqueous environment have been considered.