Pressure value during annual pressure tests of heat distribution system

This paper gives insight into the use of pressure tests in Russia. The country has a wide underground district heating distribution network that degrades. Therefore test procedures have to be utilized. The decision-making history of the pressure prediction is described step-by-step. The reviewed literature includes traditional research such as scientific Russian and European papers, practical guides and web sources. Some examples of equations are also given. The focus of this paper is on the sustainability issues related to the methods of pressure prediction, including its contribution to the sustainability, anticipated structural longevity and maintaining the opportunity for development. Reliable prediction of pressure enhances overall safety and economic efficiency. The need for this approach has grown rapidly since the late 20th century; at the same time, the necessity to systematically process the large amount of consistent and high-quality data has also increased.