Patent ID: 8524320
Filing Date: 2013-09-03
Classification: B05D,C08G,C09D,C23C,F16L

Abstract:
1. A method for providing a protective barrier coating to the interior surfaces if lead-based water service pipes, comprising the steps of: providing water service pipes formed from lead having internal diameters from at least approximately 12 mm; providing the water service pipes with ends having fittings, wherein the pipe ends within the fittings are exposed to drinking water passing through the water service pipes; coating the interior surfaces of the water service pipes and the inside surfaces of the fittings exposed to drinking water with a leak sealant barrier coating, in a single-pass run coating operation; curing the leak sealant barrier coating in at least approximately 1 to approximately 4 hours to return the water service pipes to service; wherein lead levels leaching into the drinking water from the leak sealant barrier-coated water service pipes is less than 10 μg/L (10 ppb).