METHOD OF CLEANING EXTERNAL SURFACES OF PIPES OR PIPELINES Russian patent published in 2024 - IPC B08B9/00 

FIELD: various technological processes.

SUBSTANCE: invention relates to methods of abrasive-air treatment of pipes or pipeline systems and can be used in treatment of external surfaces of pipelines for preparation for application of protective coatings. Method of cleaning external surfaces of pipes or pipelines, including passage of pipe or pipeline through a cleaning chamber with inlet and outlet holes, in which compressed air is supplied through the inlet, according to the solution in the cleaning chamber, an internal chamber is placed coaxially to it, walls of which have holes, filled with abrasive grains, is created by means of compressed air passing through holes, rotating fluidised air-abrasive medium with maximum concentration of uniformly compacted abrasive in places of interaction with processed surface, and abrasive treatment of external surfaces of pipes or pipelines is performed.

EFFECT: improving the quality of cleaning and productivity of the process of preparing pipes or pipelines for the application of protective coatings.

1 cl, 2 dwg