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 | Feb 2, 2018
How workplace design can position financial services companies for success
HOK report examines forces reshaping industry.
Codes and Standards | Jan 31, 2018
California is the first state to phase out incandescent light bulbs
In two years, the rest of the U.S. will follow suit.
Codes and Standards | Jan 31, 2018
Automated tool assists in design of force transfer around openings
Engineered Wood Assn. offers free calculator and technical note.
Codes and Standards | Jan 31, 2018
First large-scale use of perovskite solar cells in office building slated for Poland this year
Skanska will integrate the technology into building facades.
Codes and Standards | Jan 29, 2018
Advanced Energy Design Guide for K-12 Schools to achieve zero energy
Publication is joint effort by ASHRAE, AIA, IES, and USGBC.
Codes and Standards | Jan 26, 2018
Flying drones while inebriated now illegal in New Jersey
Violators could be sentenced to six months in jail.
Codes and Standards | Jan 25, 2018
OSHA penalties for violations increase
Fines adjusted for inflation in the New Year.
Codes and Standards | Jan 23, 2018
Disaster mitigation strategies that exceed code could save billions
Four dollars saved for every dollar spent, says NIBS report.
Codes and Standards | Jan 19, 2018
U.S. construction fatalities rose 6% in 2016
Falls accounted for 39% of deadly accidents.
Codes and Standards | Jan 18, 2018
Record storm surge in Boston prompts renewed calls for flood mitigation infrastructure
Newer buildings constructed in flood zone fared well.
