Abstract: A coating system for inner wall surfaces of tubes includes a hose reel and flexible hoses wound thereon. The hoses each carry an applicator nozzle through which the coating substance is dispensed. A payout guide assembly is disposed next to the reel for unwinding the hose and for feeding the nozzles into the tubes to be coated. The payout guide and the reel are also driven in reverse for removing the nozzles from the tube and winding the hoses on the reel. A high pressure paint spray system includes a paint pump assembly for supplying paint to the hose and a spray gun valve connected between the hose and the paint pumped assembly. A control system is connected to the payout guide, to the hose reel and to the spray gun valve, the control system coordinating the feeding and removing of the hose into and from the tube, as well as the paint application through the spray gun valve and the applicator nozzle.

Abstract: An integrated system for coating an inner wall surface of a tube is disclosed. A hose has an applicator nozzle attached at a forward end thereof. A payout guide is drivingly engaged with the hose to drive and to remove the hose and the applicator nozzle into and through and from the tube, respectively. A fluid supply system is in fluid communication with the hose, and includes a fluid source supplying a fluid to the hose and applicator nozzle, and a supply valve interposed between the fluid source and the applicator nozzle for selectively applying the supplied fluid to the applicator nozzle. A control system is connected to the payout guide to control the driving and removing of the hose and to the supply valve to control application of the supplied fluid to the applicator nozzle.

Abstract: A blasting nozzle assembly is used for blast cleaning internal pipe surfaces. A cylindrical sleeve has a flow channel through which blasting abrasive and a carrier fluid flow in a flow direction. A web member is integrally formed with the sleeve and extends diametrically across the flow channel. The web member has a length inside the flow channel which is about 60% to 90% of the given length of the sleeve. A stem is inserted in an opening formed in the web member such that the stem extends coaxially with the sleeve. A free end of the stem protrudes from the sleeve. A deflection tip is mounted on the free end of the stem. The deflection tip radially deflects the blasting abrasive and the carrier fluid arriving from the flow channel in the given flow direction.

Abstract: A pipe scraper assembly is forced through condenser pipe interiors for scraping residue off the inner wall surface. The scraper assembly is formed with a cylindrical body with a head and a tail end. Several mutually spaced apart rings are coaxially and rotatably supported on the cylindrical body between the head and the tail end. The diameter of the rings corresponds to the inner diameter of the pipe to be scraped. The rings have a radial cut formed therein which extends obliquely relative to the longitudinal axis of the cylindrical body.

Abstract: A pipe scraper assembly is forced through condenser pipe interiors for scraping residue off the inner wall surface. The scraper assembly is formed with a cylindrical body with a head and a tail end. Several mutually spaced apart rings are coaxially and rotatably supported on the cylindrical body between the head and the tail end. The diameter of the rings corresponds to the inner diameter of the pipe to be scraped. The rings have a radial cut formed therein which extends obliquely relative to the longitudinal axis of the cylindrical body.