Joshua Hicks & Cliff Cracauer Vapor Corrosion Inhibitors in Fire Suppression Systems TEG 159X - Building Fire Protection Systems: Corrosion and Deposit.

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Presentation transcript:

Joshua Hicks & Cliff Cracauer Vapor Corrosion Inhibitors in Fire Suppression Systems TEG 159X - Building Fire Protection Systems: Corrosion and Deposit Control

VpCI Usage in Fire Suppression Systems VpCI Basics VpCI-649 Features VpCI Implementation in Different Fire Suppression Systems

VpCI Basic Concepts Vapor-phase corrosion inhibitorsVapor-phase corrosion inhibitors –Condition an enclosed atmosphere with a protective vapor that “condenses” on all metal surfaces (recessed areas, cavities) –A multi-metal corrosion inhibitor that protects in 3 ways: contact, vapor and inter-phase. Prevents corrosion even if not in direct contact allowing cost effective, easy application, use, and disposal.Prevents corrosion even if not in direct contact allowing cost effective, easy application, use, and disposal.

VpCI Effectiveness Factors Vapor Pressure –The pressure exerted when a solid or liquid is in equilibrium with its own vapor. –VpCI vapor pressure is lower than water. Diffusion –Natural process by which VpCI molecules travel from an area of high concentration an area of low concentration until equilibrium is reached. (e.g. scent of an air freshener traveling through a room)

VpCI-649 Effective combination of vapor phase and film forming corrosion inhibitors –Protects in liquid, vapor, and inter phase Contains an anti-scalant Protects ferrous and non-ferrous metals Vapor phase and film forming protection for drained systems Contact protection for wet pipe system

VpCI-649 Compatibility Compatibility with common elastomers –Natural rubber –Synthetic rubber (EPDM, neoprene, Buna) –Silicone –Polypropylene –Fluoroelastomers (Teflon, Viton, fluorosilicone, Dyneon fluoroelastomer)

VpCI-649 Compatibility Tested in the lab and field to ensure no negative effects ASTM D 471 –Standard test for determining fluid effects on rubber properties –Determine the change in mass and shape after 7 days of immersion.

VpCI in Suppression Systems Does not cause skin sensitization –72 hour exposure test Compatible with many biocides Effective in low dosages

Deluge Systems

Deluge System Corrosion leads to leaks in piping and blockages in nozzles. Field testing with 5% solution of VpCI-649 led to 98% decrease in blocked sprinkler nozzles in the first year after and 99% decrease after 2 years.

Conclusions VpCI products reduces corrosion in fire suppression systems thereby reducing the risk of pipe leaks and nozzle blockage. Protects from corrosion in stagnant water and drained systems. VpCI-649 is environmentally friendly and non-hazardous It is safe and effective for use in most sprinkler systems.