DeOx: Corrosion Inhibiting Solutions for Wet Fire Protection Systems
South-Tek’s DeOx product line offers a full suite of corrosion solutions for wet fire sprinkler systems. Oxygen found in sprinkler systems is the primary cause of pipe corrosion. Our DeOx products assist with displacing oxygen to inhibit corrosion and extend the life of wet fire protection systems. From our O2Release Systems, to the N2Inert System or Water Deoxygenation System, South-Tek can provide right level of corrosion protection for any facility.
- Dual Vent O2Release System: Helps to eliminate the corrosive air-water interface along the high points of the sprinkler pipe network
- N2Inert System: Rapidly pre-fill wet sprinkler systems with ultra-pure nitrogen gas and effectively displace up to 99.5% of the oxygen from the system
- Water Deoxygenation System: After employing N2Inert, the Deoxygenation System then removes the dissolved oxygen and harmful bacteria from the fill water prior to it entering the wet sprinkler piping
DeOx Corrosion Inhibiting Systems
- 1,000 gal. per hour
- Reduces oxygen in both trapped air pockets, and fill water
- 16 GPM of deoxygenated water @ < 1.0ppm
- Fully pneumatic – no electrical required
- FailSafe™ design works as a true water stop
- Water accumulation fully drains back to FPS by depressurizing FPS and pressing reset button on Air Release Valve
- Lightweight design
- Low height clearance
- Only one connection to the piping
- Primary Air Release Valve Failure Alarm with audible buzzer and visual LED indicator
- Meets 2016 NFPA 13-7.1.5 vent requirement
- 9V Lithium ion battery with low battery buzzer and visual LED indicator
- Reduces oxygen levels within any wet FPS
- Effectively displaces all trapped air within a wet system with pure nitrogen
- Includes injection port to connect nitrogen supply and exhaust port
- Exhaust port provides connection w/ Quick-Check® - Portable Purity Sensor
- Requires nitrogen supply
- Battery operated, hand-held nitrogen analyzer verifies that desired nitrogen purity is achieved within all zones
- Connects to an AutoPurge System or Quick-Check Sampling Port
- Easy to use one touch calibration
- Automatic Shutoff
Oxygen = Corrosion
As a rule, air migrates through wet sprinkler piping to the highest points of the system, where it accumulates in pockets under compression due to the water pressure in the system. These “trapped air pockets” are comprised of 20.9% oxygen, which drives the corrosion of the interior pipe wall at the air-water interface.
Another contributor to the corrosion of wet sprinkler piping comes from the highly oxygenated water that fills the system. The dissolved oxygen in the fill water reacts with the steel to form a layer of corrosive black iron oxide (magnetite) along the submerged areas of the interior pipe wall. In addition, the dissolved oxygen can transfer out of the water and into the trapped air pockets, helping to sustain the corrosion reaction at the air-water interface.
Corrosion leads to the formation of localized pinholes and the resulting sprinkler pipe leaks, cause sprinkler head blockage, reduce flow rates, and render fire protection systems completely inoperable in the event of a fire – leading to loss of life and property.
The Corrosion Triangle
Corrosion is a result of three elements coming together; unprotected metal, oxygen and water. Removing the presence of one element, in this case oxygen, disrupts the equation and inhibits corrosion.
Results in a uniform wall-thinning corrosion mechanism in black steel and localized pitting corrosion mechanism in galvanized steel
OXYGEN ELECTROCHEMICAL POTENTIAL
There is an inexhaustible source of oxygen in compressed supervisory air
Come from residual water and moisture left behind after hydro test