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 1, 2022
Engineering Business Sentiment study finds optimism despite growing economic concerns
The ACEC Research Institute found widespread optimism among engineering firm executives in its second quarterly Engineering Business Sentiment study.
Codes and Standards | Feb 28, 2022
Low-cost concrete alternative absorbs CO2
Researchers at Worcester Polytechnic Institute have developed a new CO2-absorbing material that’s a low-cost alternative to concrete.
Multifamily Housing | Feb 25, 2022
First set of multifamily properties achieve BREEAM certification in the U.S.
WashREIT says it has achieved certification on eight multifamily assets under BREEAM’s In-Use certification standard.
Codes and Standards | Feb 24, 2022
Most owners adapting digital workflows on projects
Owners are more deeply engaged with digital workflows than other project team members, according to a new report released by Trimble and Dodge Data & Analytics.
Codes and Standards | Feb 21, 2022
More bad news on sea level rise for U.S. coastal areas
A new government report predicts sea levels in the U.S. of 10 to 12 inches higher by 2050, with some major cities on the East and Gulf coasts experiencing damaging floods even on sunny days.
Codes and Standards | Feb 21, 2022
New standard for ultraviolet germicidal irradiation
The Illuminating Engineering Society (IES) recently introduced the standard, ANSI/IES RP-44-21 Recommended Practice: Ultraviolet Germicidal Irradiation.
Wood | Feb 18, 2022
$2 million mass timber design competition: Building to Net-Zero Carbon (entries due March 30!)
To promote construction of tall mass timber buildings in the U.S., the Softwood Lumber Board (SLB) and USDA Forest Service (USDA) have joined forces on a competition to showcase mass timber’s application, commercial viability, and role as a natural climate solution.
Codes and Standards | Feb 18, 2022
Proposal would make all new buildings in Los Angeles carbon-neutral
Los Angeles may become the next large city to ban fossil fuels from new construction if legislation recently introduced in the city council becomes law.
Codes and Standards | Feb 18, 2022
U.S. Army outlines ambitious renewable energy and decarbonization goals
Net-zero emissions in all procurements and a microgrid at every base among aims.
Sponsored | BD+C University Course | Feb 17, 2022
Metal roofing trends
New ideas in design and constructability are radically changing how metal systems are used as roofing for commercial and institutional buildings. Behind the investment in these new kinds of expressions and construction approaches is a growing interest in improved performance and reduced environmental impact. Metal roofing systems can cut cooling and heating loads significantly, according to the EPA.
