Comparative analysis of the hydraulic characteristics of worn-out metal water pipes calculated according to the formulas of different authors

Purpose: To compare the results of the hydraulic calculation of metal water pipes according to three known dependencies. Methods: The calculated dependencies used to perform the hydraulic calculation of metal water pipes are determined. Results: It is proposed to perform a hydraulic calculation of worn metal water pipes with internal deposits according to the refined formula of F.A. Sheveleva, which takes into account the thickness of the sediment layer for pressure losses in pipes and has sufficient accuracy. Conclusion: It is recommended to use the refined formula of Professor F.A. Shevelev for hydraulic calculations of pipes, taking into account the change in their actual internal diameter due to the formation of a time-varying layer of internal deposits.