Chemical cleaning is a procedure used to remove impurities and debris from the interior surfaces of piping systems/ equipment. Chemical cleaning aims to ensure that pipelines/ equipment are free from hydrocarbons, greases, oils, rust, scale, and other impurities.
Hot oil flushing is a process used to remove contaminants from piping systems after installation. It is performed to ensure that the pipelines and the operation oil are clean and free from contamination.