Purpose: It consists in carrying out a comparative analysis of the values of the characteristics of the hydraulic potential of metal pipelines used in assessing the energy consumption of pumping units installed on pipelines with different thickness of the layer of internal deposits.
Methods: The reasons for changing the values of hydraulic characteristics of metal pipelines during their operation are developed in tabular form. A concrete example shows the change in the values of the characteristics of the hydraulic potential of pipes with different thickness of the layer of internal deposits included in the calculated dependence for determining the actual energy consumption of pumping units.
Results: It is proposed to develop for the entire range of manufactured steel pipes and pipes made of gray cast iron, a scale of maximum permissible values of the thickness of the layer of internal deposits, according to which a decision should be made to continue or stop the operation of pipe wires.Conclusion: To recommend, based on the hydraulic calculation of the characteristics of the hydraulic potential of pipes for the given example, minimizing the use of steel and cast iron pipes made of gray cast iron in projects of water supply and drainage networks. When operating metal pipelines, take into account the dynamics of changes in the energy consumption of pumping units with different thickness of the layer of internal deposits.