Demonstration of a Field Rehabilitation Technique for Removing Corrosive SolderFlux in Cold Water Copper Piping Systems

摘要

Premature Failures in copper potable water systems are often a direct result ofpoor installation practices. One practice that can lead to accelerated corrosion and failure of copper piping systems, particularly those used to convey cold water, is the use of excessive soldering flux. This report evaluates a technique for mitigating corrosion induced by solder flux. The technique involves flushing the affected system with hot water (150 to 170 degrees F) at a high velocity to remove soldering flux residue that may still be inside the copper tubes and fittings. The technique has been tested at Fort Stewart, GA under the FEAP demonstration program and has been quite successful in mitigating the problem. The technique is ideal to field use since it is relatively simple and does not require removing any piping or destroying walls or floors. It is an environmentally acceptable technique, as it does not require the use of chemicals.