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 | Jun 21, 2017
World Green Building Council: All buildings must be net zero by 2050 to avert 2°C rise
Building efficiency essential to tempering global climate change.
Codes and Standards | Jun 21, 2017
Senate bill would prohibit tax money for sports stadium projects
Bipartisan legislation would prevent use of municipal bonds by pro teams.
Codes and Standards | Jun 19, 2017
Developer, architect hit with $10 million construction defect verdict
Case pertained to construction of condo development that was not fire code-compliant.
Codes and Standards | Jun 19, 2017
Green building advocates erect icehouses on Penn. state capitol steps to make point on codes
State’s codes have not been updated since 2009.
Codes and Standards | Jun 15, 2017
Cornell Tech unveils plans to reach Net Zero at The Bloomberg Center
Campus plans include photovoltaic arrays and geothermal ground source heat pumps.
Codes and Standards | Jun 13, 2017
Canada Green Building Council and Green Business Certification Inc. announce partnership
New joint venture will deliver enhanced services and support tools and programs throughout Canada.
Codes and Standards | Jun 8, 2017
Nail-Laminated Timber Design and Construction Guide released
New document focuses on design and construction considerations for horizontal NLT applications.
Codes and Standards | Jun 8, 2017
Car sharing popularity means parking zoning and codes may be promoting overbuilding of garages
Some designers look to modular designs in anticipation of alternate uses.
Codes and Standards | Jun 7, 2017
IAPMO advances toward new 2017 Water Efficiency and Sanitation Standard
Revised pipe-sizing method for residential applications will be included.
Codes and Standards | Jun 7, 2017
New Colorado law could stimulate stalled condo market
Construction defect law modifications could ease litigation risk and cut insurance rates.
