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 | Apr 21, 2023
Federal court overturns first natural gas ban in the U.S.
A recent ruling by the Ninth U.S. Circuit Court of Appeals in San Francisco invalidating Berkeley, California’s ban on natural gas within new building construction puts similar measures adopted around the country in legal jeopardy.
Codes and Standards | Apr 21, 2023
Sixteen-year-old climate law not having intended impact on decarbonizing federal buildings
Sixteen years out from a 2007 law that aimed to end the use of fossil fuels in federal buildings, gas heat is still being installed within the federal sphere.
Green | Apr 21, 2023
Boston to adopt stringent climate-friendly building code
Boston will soon adopt a new stringent green state building code that aims to significantly reduce carbon emissions in new construction and major renovations.
Multifamily Housing | Apr 21, 2023
Arlington County, Va., eliminates single-family-only zoning
Arlington County, a Washington, D.C., community that took shape in the 1950s, when single-family homes were the rule in suburbia, recently became one of the first locations on the East Coast to eliminate single-family-only zoning.
Contractors | Apr 18, 2023
New York City construction fatalities, injuries rise in 2022 as activity booms
New York City’s construction fatalities rose from nine in 2021 to eleven in 2022, according to a report by the New York City Department of Buildings. Recorded injuries also rose to 554 last year after leveling off in 2020 and 2021.
Resiliency | Apr 18, 2023
AI-simulated hurricanes could aid in designing more resilient buildings
Researchers at the National Institute of Standards and Technology (NIST) have devised a new method of digitally simulating hurricanes in an effort to create more resilient buildings. A recent study asserts that the simulations can accurately represent the trajectory and wind speeds of a collection of actual storms.
Green | Apr 18, 2023
USGBC and IWBI unveil streamlined certification pathway for LEED and WELL green building programs
The U.S. Green Building Council, Green Business Certification Inc., and the International WELL Building Institute released a streamlined process for projects pursuing certifications for the LEED green building rating system and the WELL Building Standard. The new protocol simplifies documentation for projects that are pursuing both certifications at the same time or that have already earned one certification and are looking to add the other.
K-12 Schools | Apr 18, 2023
ASHRAE offers indoor air quality guide for schools
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has released a guide for educators, administrators, and school districts on indoor air quality. The guide can be used as a tool to discuss options to improve indoor air quality based on existing HVAC equipment, regional objectives, and available funding.
Smart Buildings | Apr 7, 2023
Carnegie Mellon University's research on advanced building sensors provokes heated controversy
A research project to test next-generation building sensors at Carnegie Mellon University provoked intense debate over the privacy implications of widespread deployment of the devices in a new 90,000-sf building. The light-switch-size devices, capable of measuring 12 types of data including motion and sound, were mounted in more than 300 locations throughout the building.
Affordable Housing | Apr 7, 2023
Florida’s affordable housing law expected to fuel multifamily residential projects
Florida Gov. Ron DeSantis recently signed into law affordable housing legislation that includes $711 million for housing programs and tax breaks for developers. The new law will supersede local governments’ zoning, density, and height requirements.
