Condition classification of sewerage systems according to the deposit layer thickness in the bench part of pipes

Abstract

The article aims to classify the condition of sewerage systems made of different materials and having different diameters with a build-up of deposits in the bench part; this analysis is based on their televising and analyzing the values of hydraulic characteristics. The analysis of televising data and the hydraulic potential of pipes establishes the class of a pipeline having internal deposits, which is used to decide on the continuation of operation, the need for preventive measures, including mechanical or hydrodynamic cleaning of the system, or the method of its reconstruction. Noteworthy is that by determining the hydraulic efficiency factor of sewerage systems with different deposit layer thicknesses in the bench part of pipes, a range of this coefficient can be established (in tabular form), which, regardless of the diameter and type of pipe materials, can be used to make a decision on continuing further operation, carrying out preventive measures (mechanical or hydrodynamic cleaning), or removing it from service for reconstruction. Also, recommendations are provided on the possibility of continuing or discontinuing the operation of wastewater pipelines with internal deposits. It is proposed to classify the operating condition of sewer pipelines with deposits in the bench part to make decisions on the need for restoring the throughput capacity, reconstruction, or replacement of pipes.