Barrier Coating Corrosion Control Methods and Systems for Interior Piping Systems

摘要

Methods and systems for providing cleaning and providing barrier coatings to interior wall surfaces of small diameter metal and composite piping systems in buildings. An entire piping system can be cleaned in one single pass by dry particulates forced by air throughout the building piping system by an external generator, and the entire piping system can be coated in one single pass by a machine connected exterior to the piping system. Small pipes can be protected by the effects of water corrosion, erosion and electrolysis, extending the life of piping systems such as copper, steel, lead, brass, cast iron piping and composite materials. Coatings can be applied to pipes having diameters of approximately ⅜″ up to approximately 6″ so that entire piping systems such as potable water lines, natural gas lines, HVAC piping systems, drain lines, and fire sprinkler systems in single-family homes to apartments to high-rise hotel/resort facilities and office towers, apartment and condominium buildings and schools, can be cleaned and coated to pipes within existing walls. The coating forms an approximately 4 mils or greater covering inside of pipes. Buildings can return to service within approximately 24 to approximately 96 hours.

主权项

1. An on-site method of cleaning, applying a corrosion resistant barrier coating, and stopping leaks in an existing underground piping system, wherein the underground piping system, comprising the steps of:
isolating pressurized water supply pipes in the underground piping system; generating and supplying compressed air into the pressurized water supply pipes; introducing a nonliquid cleaning agent having an abrasive medium into the compressed air; cleaning interior walls of the pressurized water supply pipes with the nonliquid agent wherein shadows, streaks and discolorations caused by stains of mill scale, rust and old coatings remain on no more than 33 percent on the surface of the cleaned interior walls of the pressurized water supply pipes; applying one single layer of a barrier coating with the compressed air consisting of a two-part epoxy with a base resin and a base-curing agent having a selected viscosity to the cleaned interior walls of the pressurized water supply pipes in one single pass through run on-site; and continuously flowing air over the epoxy barrier coating applied to the interior walls of the pressurized water supply pipes to achieve an initial set of the epoxy barrier coating; and restoring the pressurized water supply pipes in the underground piping system to service.