NFPA and Corrosion
The National Fire Protection Association (NFPA) has recognized the destructive potential of MIC and corrosion in sprinkler systems and has adjusted the industry codes and requirements accordingly.
The following are examples of recently implemented code requirements related to corrosion under NFPA 13 and NFPA 25.
18.104.22.168 “Water supplies and environmental conditions shall be evaluated for the existence of microbes and conditions that contribute to MIC, the owner shall then notify the sprinkler system installer and a plan shall be developed to treat the system using one of the following methods:
22.214.171.124 Water supplies and environmental conditions shall be evaluated for conditions that contribute to unusual corrosive properties. Where conditions are found that contribute to unusual corrosive properties, the owner shall notify the installer and a plan shall be developed to treat the system using one of the following methods.
126.96.36.199 Where approved biocides and corrosive inhibitors are used together they shall be compatible with each other and system components.
14.2.1 An inspection of piping and branch line conditions shall be conducted every five years by opening a flushing connection at the end of one main and removing a sprinkler toward the end of a branch line for the purpose of inspection for the presence of foreign organic and inorganic material.
188.8.131.52 Tubercules or slime, if found shall be tested for indications of Microbiologically influenced corrosion (MIC)
Liberty corrosion solutions offer water and sludge deposit tests that conform to NFPA 13 and NFPA 25.