PROCESSES FOR LEAD AND METAL WATER SERVICE LINES

摘要

Methods, processes, compositions and systems for preventing leaching effects from drinking lead based water service pipes having an inner diameter of at least approximately 12mm and the pipe coatings. 2-step thermoset resin coating is applied to pipe interiors without dismantling the pipes where the curing agent can be phenol free and plasticizer free adduct. The coating can reduce heavy metals, such as lead, from leaching from installed pipes to less than approximately 10 µg/L (10 ppb). When cured, specific leachates, Bisphenol A and Epichlorohydrin from the coatings will be (less than) < 1 µg/L (1 ppb) with overall TOC levels measured at (less than) < 2.5mg/L (2.5ppm). Pipes can be returned to service from at least approximately 1 to approximately 4 hours.