Galvanized Steel: The calculated service life of galvanized steel pipe increased from 10 to 176 years.įor more information see South-Tek Systems Corrosion Inhibiting Solutions. Test ResultsĪs a result of 98% pure nitrogen in lieu of compressed air alone in dry fire sprinkler and pre-action systems tested for 3,000+ days:īlack Steel: The calculated service life of black steel pipe increases from 20 years to 63 years. How serious of a problem is corrosion in dry fire sprinkler systems?ħ3% of dry and pre-action fire sprinkler systems inspected had significant corrosion issues after 12.5 years of normal use (VDS Study).Ĭorrosion leads to property damage, ongoing pipe repair and replacement, decreased c-factor and sprinkler head blockage – potentially rendering the system inoperable in the event of a fire. N 2-Blast Nitrogen systems ensure a -40☏ to -70☏ dew point within the Fire Sprinkler System preventing condensation buildup that leads to ice plugs. Another benefit of the N 2-Blast system is preventing freeze ups and ice plugs that can occur in a system supplied with compressed air alone. STANDARD FEATURES Watertight, Airtight and Dustproof Crush Resistant Auto-Purge System Accuform Foam Rustproof UV Protected Chemical Resistant Standard. This system effectively arrests all three types of corrosion electrochemical, galvanic and micro-biologically influenced corrosion (MIC). The N 2-Blast System installed for your dry or pre-action fire sprinkler system generates and introduces 98% pure nitrogen, displacing any oxygen and moisture, a key contributor to corrosion, from the fire system piping through the AutoPurge system. The South-Tek N 2-Blast Corrosion Inhibiting System Their dual-bed pressure swing adsorption (PSA) nitrogen separation technology is superior to other membrane systems, generating more nitrogen with less feed air, providing 98% pure nitrogen. Our partners at South-Tek Systems manufacture the most efficient and cost effective engineered corrosion systems on the market. It’s important to remember that a properly maintained nitrogen system will not reverse corrosion, rather it stops corrosion from getting worse, and prevents it in a new system or any new piping. The answer is to introduce and maintain 98% pure nitrogen in the system to effectively arrest corrosion. ( See: What causes pinhole leaks in fire sprinkler systems?) What can I do to prevent corrosion in my dry fire sprinkler system? The presence of oxygen in the compressed air along with any residual water remaining from required testing and condensations leads to corrosion, pinhole leaks, obstructions and costly repairs. Internal corrosion is a growing and costly problem for these systems. Upon activation water flows throughout the system to the activation point(s) and is expelled through the fire sprinkler heads. Dry Fire Sprinklers – Protection from Corrosionĭry or pre-action (a two-step activation) fire sprinkler systems are typically filled with compressed air supplied by an air compressor, which maintains pressure throughout the system until one or more activation points occur.
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