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Fire Suppression Sprinkler & Main Pipe Lining


Rusted fire suppression pipes leak and clog sprinklers during a fire

Fire suppression pipes usually corrode due to inadequate corrosion prevention water treatment. When they do corrode, they eventually leak, but the problem could potentially be much worse! When the fire sprinkler pumps turn on the shock wave that travels through the pipe dislodges the corrosion deposits, which in turn block fire sprinklers when they are needed the most.

Fire Sprinkler & Suppression Main Pipe Lining

Fire suppression sprinkler pipes tend to have narrower diameters than other pipes, and are thus usually rehabilitated using epoxy pipe lining. The process involves first using high pressure and high flow air to blow sand through the sprinkler pipes to remove corrosion deposits.

fire suppression pipe epoxy pipe liningNext a special epoxy liquid is blown through the pipes which coats all surfaces uniformly and it is then cured by heat. Finally the pipes are pressure tested and the process repeated in case not all leaks were sealed. Learn more about epoxy pipe lining here…

Case Study – Epoxy Pipe Lining of Pre-Action Fire Suppression System at Fort McPherson, GA

A pre-action fire suppression system was installed in a portion of the U.S. Army Reserve Component Headquarters at Fort McPherson, GA, when the structure was constructed in 1995. This system, which is normally kept at a standard internal air pressure using air compressors in the basement electrical-mechanical room, is designed to remain dry, and have water in it only in the event of a fire. The Pre-action Fire Suppression System has developed pinhole leaks due to what appears to be galvanic corrosion. The U.S. Army Corps of Engineers Engineer Research and Development Center, Construction Engineering Research Laboratory proposed installing an in-place epoxy lining of the system using a process developed by American Pipe Lining, Inc. The in-place epoxy lining was installed in the pre-action system and the effectiveness of the coating process documented. The work included restoration and lining of all interior pre-action piping mains, risers, branch laterals, and service piping to individual sprinkler head locations installing new 1/2-inch sprinkler heads on pre-action system and pre-action system recertification. It was determined that the in-place epoxy lining process was effective at solving the pinhole leak problem.
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