Analysis of the influence of factors on the corrosion resistance of the sewage pipeline

Sewage systems are an important component of the life support system, which, in particular, determine the ecological condition in the settlement. The durability of the laid network depends on many factors, one of which is their corrosion resistance. The number of accidents on the site and the number of necessary repairs are also related to this factor. The purpose of the work was to study the factors that have the greatest influence on the corrosion resistance of sewer pipelines, with the aim of increasing their service life and reducing the number of accidents. The analysis used information obtained during the practical operation of sewer pipelines in the city of Kyiv. The data of a group of pipelines with diameters from 500 to 1500 mm were analyzed. The planning of the active experiment was made on a sample of data for 25 years of operation. The presented study was carried out in the statistical package STATGRAPHICS. A full factorial experiment was conducted. According to the results of the work, the total number of determining factors was reduced. Based on the methods of statistical analysis, the following conclusions were obtained: a statistically significant relationship was established between the use of concrete pipes with low speed and the largest number of pipeline accidents. The material of the pipeline and the speed in it turned out to be the factors that have the greatest influence on the life of the pipeline and the number of accidents on the pipeline.