Abstract: A pipe cleaning apparatus for cleaning pipes or tubes includes a plurality of scrapers and a plurality of spacers secured to a shaft. Each scraper includes a scraper body with an outer perimeter defining a scraper blade adapted to contact an inner surface of a tube and at least one radial slot defined by the body. Each of the scrapers and spacers are inserted onto a cylindrical shaft. Each spacer is sandwiched between two adjacent scrapers. The scrapers are adapted to contact an inner surface of a tube or a pipe.

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.

Abstract: A cleaning plug assembly for cleaning condenser and heat exchanger tubes and the like is disclosed. The plug is adapted to be propelled through a tube by fluid pressure injected into the tube, and includes an elongated body supporting annular rings extending radially outwardly for contacting the inner surface of a tube. The rings are selectively removable from the body of the plug and are formed to circumferentially contract and expand within the tube to be cleaned. The rings are secured against free rotation on the plug body by projections formed in circumferential grooves formed on the body for receiving the rings. The projections are sized to allow contraction of the rings.