Abstract: A dart assembly for cleaning tubes including at least one annular disk having a first end, a second end, an outer perimeter and at least one longitudinal groove in the outer perimeter extending from the first end to the second end and at least one cutting wheel. The cutting wheel is positioned within the groove such that a portion of the cutting wheel extends into the groove and a portion extends beyond the outer perimeter of the annular disk. The dart assembly may also include at least one scraper disk and the annular disk and the scraper disk may be positioned at opposite ends of a shaft. Also, a method of cleaning a tube where a dart assembly is inserted into the inner diameter of the tube and forced through the tube using pressurized fluid. The dart assembly may have any or all of the features described above.

Abstract: A dart assembly for cleaning tubes including at least one annular disk having a first end, a second end, an outer perimeter and at least one longitudinal groove in the outer perimeter extending from the first end to the second end and at least one cutting wheel. The cutting wheel is positioned within the groove such that a portion of the cutting wheel extends into the groove and a portion extends beyond the outer perimeter of the annular disk. The dart assembly may also include at least one scraper disk and the annular disk and the scraper disk may be positioned at opposite ends of a shaft. Also, a method of cleaning a tube where a dart assembly is inserted into the inner diameter of the tube and forced through the tube using pressurized fluid. The dart assembly may have any or all of the features described above.

Abstract: A dart assembly for cleaning tubes that includes a plug with a shaft having a first end and a second end and a scraper extending laterally from the shaft and a flexible, compressible ball attached to the second end of the plug. Also, a method of cleaning a tube. A dart assembly as previously described is inserted into the inner diameter of the tube, and the dart assembly is forced through the tube using pressurized fluid. The first end of the dart assembly may be inserted into the tube first such that the interior surface of the tube is first contacted by the scraper and then contacted by the ball as the dart assembly is forced through the tube.

Abstract: A pipe cleaning apparatus that is a pipe cleaning plug assembly for cleaning pipes or tubes that includes a plurality of scrapers removably secured to a plurality of shafts. Each of the scrapers includes a body having an outer perimeter defining a scraper blade and at least one perforation defined by the body. Each of the shafts is removably secured to the scraper. The scraper blade is adapted to contact an inner surface of a tube or a pipe.