In his new column, Matt Klaus, NFPA's principal fire protection engineer and staff liaison for NFPA 13, tackles the issue of corrosion in wet-system sprinkler piping in the May/June issue of NFPA Journal.
With wet pipe systems, the main focus of limiting corrosion is on limiting the amount of air in the system. A task group studied that issue and found that installing system air vents had numerous benefits, including limiting corrosion. The findings led to a revision to the standard requiring that a single air vent be installed for each wet system. However, that idea has been controversial, with some stakeholders claiming that the requirement adds cost to property owners without any assurance that there is a long-term benefit.
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