Corrosion in sprinkler system piping can be a costly problem if leaks occur, causing damage to the interior of a structure, according to Matt Klaus, Principal Fire Protection Engineer with the National Fire Protection Association.
Replacing piping is no small expense, either. Corrosion can also cause blockages in the piping network, which can lead to an ineffective sprinkler system during a fire.
Corrosion can take on many forms, including oxidation, microbiologically influenced corrosion, and galvanic corrosion. The technical committees responsible for NFPA 13, Installation of Sprinkler Systems, have been looking at ways to eliminate or reduce corrosion in sprinkler systems for several revision cycles.
Reducing corrosion in dry systems can be achieved by eliminating all of the water from these systems after testing/activation and using alternative gases like nitrogen for charging these systems. For wet systems, limiting the amount of air in the system is the goal. Air trapped in pressurized sprinkler system piping results in an increase in the concentration of dissolved oxygen in the piping, enabling corrosion. Venting the trapped air in a wet system reduces this problem, so a revision to the wet system sprinkler system standard requires that a single air vent be installed for each system.
Depending upon the building geometry and sprinkler design, it is possible to trap air in many locations in the system, meaning a single vent may not be effective. Therefore, some stakeholders believe that the requirement adds cost to the property owner and the design team without any assurance that there is a long-term benefit to the system.
Related Stories
Codes and Standards | Mar 19, 2021
California city bans construction of new gas stations
Existing stations will not be allowed to add more pumps.
Codes and Standards | Mar 18, 2021
Congressmen ask Biden to tackle rising lumber costs
Rising materials costs and supply shortages threaten economic recovery, housing starts.
Codes and Standards | Mar 16, 2021
Massachusetts bill would mandate rooftop solar on new homes, commercial buildings
Proposed Bay State mandate modeled on California’s.
Codes and Standards | Mar 15, 2021
Nevada may create areas for tech companies to form own governments
Legislation calls for ‘Innovation Zones’ that could become smart cities.
Codes and Standards | Mar 11, 2021
Los Angeles commits to carbon-free city buildings
City will take into account embedded carbon when contracting to buy construction products.
Codes and Standards | Mar 10, 2021
‘Smart retrofitting’ will be crucial to net zero aspirations
AI, analytical software, Internet of Things are keys to decarbonization of built environment.
Codes and Standards | Mar 9, 2021
Salt Lake City is first jurisdiction to adopt new standards for off-site construction
Code Council and Modular Building Institute developing standards and compliance protocols.
Codes and Standards | Mar 8, 2021
Hyperlocal zoning could spur more affordable housing construction
Letting blocks and streets pass their own rules could have impact.
Codes and Standards | Mar 5, 2021
Biden builds on Trump’s “Buy American” order
New administration extends preferences for domestic construction materials.
Codes and Standards | Mar 4, 2021
Biden administration overturns Trump’s federal building design mandate
Previous order promoted classical and “traditional” architecture above others.
