![]() ![]() ![]() It requires a single manual, automatic or other approved air vent to be located near a high point on each metal wet pipe sprinkler system.ĪGF’s COLLECTanDRAIN Model 5400 heated auxiliary drain cabinet is installed in a warehouse. Based on those studies, the 2016 edition of NFPA 13 adopted the requirement for air vents as part of the main text. Venting any amount of air was found to reduce the amount of resulting corrosion. Long term studies by the National Fire Prevention Association (NFPA) and Factory Mutual have found that trapped air in wet pipe sprinkler systems is a major contributing factor of corrosion. If the check for corrosion-caused obstructions leads to more corrosion, what can be done to stop the cycle? Ironically, the fresh water and trapped air that is introduced into the system during those inspections will actually increase the rate of corrosion. Periodic internal inspections are required by NFPA 25 to check for obstructions to prevent this. While corrosion-caused pinhole leaks in pipes can result in thousands of dollars in property damage and repair cost, the real concern is it can also cause obstructions that impair system performance and put lives at risk. In wet pipe fire sprinkler systems, the combination of water, metal and oxygen from trapped air creates corrosion. By including new products such as air vents, self-draining auxiliary drains in heated cabinets and flood elimination devices, engineers can design systems better equipped to protect themselves against the common pitfalls of corrosion and freezing. Recent innovations have presented a few possible answers to that question. ![]() How can engineers design wet fire sprinkler systems equipped to prevent corrosion and dry systems equipped to prevent freezing? That has long been a question central to code requirements and new product development. ![]()
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