Method of cleaning and passivating a fire protection system
AssigneeH.E.R.C. Products Incorporated
InventorsJerome H. Ludwig, Myron B. Shenkiryk
Life of this patent
Estimating the term…
Abstract
A method to chemically clean and immediately passivate a water distribution system to quickly form a passivation layer. The system may be a potable water system, a non-potable water system, a water well or a fire protection system such as a fire sprinkler system and may be treated with a biocide. A section of the system is isolated and chemically cleaned, then is immediately passivated using a high concentration of passivating agent. A passivating layer quickly forms, then the concentrated passivating agent is removed and a maintenance concentration of passivating agent is added. The cleaned and passivated section is restored to the system to provide improved water flow.
Claims13
A method of cleaning and passivating a fire protection system, comprising:
- isolating a section of the system for introducing a cleaning solution through an interior of the section;
- introducing an effective amount of the cleaning solution into the section;
- maintaining the cleaning solution in the section to remove a scale and sediment from the interior of the section;
- removing the cleaning solution containing the scale and sediment from the section to provide a cleaned interior section;
- immediately introducing into the cleaned section an effective concentration of a passivating agent in aqueous solution;
- maintaining the effective concentration of passivating agent in the section for about 15 to about 120 minutes to form a passivating layer on the interior of the cleaned section;
- and
- restoring the cleaned and passivated section with the system.
Dependencies are inferred from the claim text.