Hydraulic Resistance of Pipelines Restored with Polymer Hoses

The influence of the choice of computational dependencies for determining the coefficient of hydraulic resistance of pipelines restored using polymer hoses is numerically investigated. The results of calculating the hydraulic resistance coefficient of restored pipelines were compared according to the formulas of Blasius, Nikuradse, Shifrinson, Altschul, Volgin, as well as according to the dependence for calculating the hydraulic resistance of pipelines made of polymer materials according to SP 399.1325800.2018 “External water supply and sewerage systems made of polymer materials.” An assessment of the impact of these calculations on the throughput of pipelines has been carried out.