The reliability of these systems also depends on reliability of the installed equipment and the supply source. Structural integrity is influenced by loadings, defined by thermalhydraulic processes. The reliability of all these systems depends on the degradation mechanisms and structural integrity of pipes. The energy systems considered in this paper are district heating, gas and oil supply networks. The aim of the work presented in this paper is to develop a common scientific methodology for assessment of reliability of the pipeline networks energy systems. Although the original intention is to apply the developed methodology for the assessment of the reliability of the Lithuanian energy systems, in general, the methodology is applicable for any pipeline network system in any country. The main results of this pilot study are presented in the paper. As a pilot study, the application of the developed methodology for the analysis of Kaunas (Lithuania) district heating system was performed. Consequently, the developed methodology includes three types of analyses: probabilistic mathematical, deterministic thermal–hydraulic and deterministic-probabilistic structural integrity analyses. The reliability of pipeline networks is treated as a complex task.

The reliability of energy network systems also depends on reliability of the installed equipment and the supply source. Structural integrity is influenced by loadings, defined by thermal–hydraulic processes. The developed methodology is applicable for district heating, gas and oil supply networks. The aim of the work presented in this paper is to develop a common scientific methodology for the assessment of reliability of the pipeline network energy systems.

Strength calculation of steel tanks