Chemical cleaning divides into two types:
Pre-start Chemical Cleaning
Operational Chemical Cleaning
«Chemical Cleaning Technologies» LLC helps to avoid economic, industrial-technological, ecological and labor losses by completely restoring and cleaning the polluted surfaces.
Types and description of chemical cleaning technologies
1. Pre-startup cleaning in a place (PCIP)/Pre-starting chemical cleaning in-place by circulation method
Its purpose is to remove production residue, rust, corrosion products, welding burr, lubrication oils, sand and other contaminants from the installed pipelines and equipment that may appear during transportation, long-term storage and erection.
Pre-start chemical cleaning includes a set of operations: first the high-speed water flushing of the internal circuits surfaces is carried out to remove contaminants that are poorly coupled with the metal surface – sand, loose pollution, burr, etc. In order to remove the lubricants and oils from the surface. The surfaces are treated with an alkaline solution after the water flushing. It isn’t until after then it safe to proceed to the main stage of pre-start up treatment – treatment of deposits with an acid detergent formula. The next phase is the creating of a protective metal oxide film on the cleaned surface to prevent re-corrosion. The neutralization of the waste solution ends chemical flushing stage.
2. Clean-in-place (CIP)/Operational chemical cleaning in-place by circulation method
The acid and alkaline washing are the main operation of operational chemical cleaning of pipelines and equipment from the formed deposits that can be carried out by various methods and means. At the same time, the cleaning effect directly depend on the agent selection accuracy, the concentration and speed of the washing solution, the temperature, solution contact duration with the deposits of their quantitative and quality characteristics.
This measure is necessary to ensure the undisturbed and efficient operation of the equipment and to prevent the creation of an emergency.
3. Chemical cleaning by reagents high pressure spraying
Properly selected cleaning solutions and a great variety of the spray heads allows to meet the challenge of washing from the pipe lines diameter up to tens of meters in diameter.
Extraordinary efficiency is achieved by spraying solution through rotating nozzles and heads providing an intensive supply of washing liquid. Therefore, a heavy stream is applying to the surface and thus a scraper effect is achieved, that enhances the action of reagents. Jets pass over the entire surface along a certain trajectory treating each surface area under powerful pressure. The temperature of the washing liquid up to 70°.
4. Chemical cleaning by solution dip
The chemical preparation units are used for chemical treatment by immersion. The main working area of them is a certain number of baths arranged in a certain sequence with appropriately selected etching reagent. This equipment contains stirring via a special pipe distribution system. The cleaned elements at the end of the technology process are moved to the drying compartment for further processing in order to protect against atmospheric corrosion during transportation and storage.
«Chemical Cleaning Technologies» LLC helps to avoid economic, industrial-technological, ecological and labor losses by complete restoring and cleaning of the polluted surfaces.