Pipeline cleaning is the process of removing deposits from water pipelines and sewers to extend the service life and improve the capacity of the pipe. It is an essential part of pipeline rehabilitation and maintenance.
The incidence of pipeline failure increases greatly due to deterioration and corrosion of pipeline infrastructure caused from the build-up of deposits such as iron sulfate, mineral scales, bacteria, and asphaltene. The failure of critical civil engineering infrastructure such as pipelines and sewers has wide ranging public safety and environmental impacts which result in expensive clean-up and pipe replacement costs. Pipeline cleaning can reduce the risk of pipeline failure by removing these deposits.
Pipeline Cleaning Methods
The main is mechanically cleaned by rack boring or drag scraping to remove any corrosion deposits from the pipe wall and to provide a smooth pipe surface for application of the resin. After cleaning the pipe is plunged, swabbed and pigged to remove any remaining loose debris and standing water.
Trenchless CCTV Inspection
Using a closed-circuit television camera (CCTV) the pipeline is then inspected to ensure that the main is clean, free from standing water and that no service connections are passing water back into the main. The video tape produced is retained for record purposes and supplied to the client at the conclusion of the project.