Encapsulation of Corrosion Inhibitors in Mechanical Equipment
Equipment purged with nitrogen will need to have N2 purge removed during piping connections, and in some cases, is not practical to re-purge. Fogging equipment with a product such as Cortec VpCI-337 and encapsulated with a flangeDOT+VCI/flangeDOT+Tag+VCI can protect project critical mechanical equipment for up to two years.
Materials:
- Graco Ultra 395 Airless Sprayer or equivalent with Graco Tip LTX#321 or equivalent (.021 max orifice)
- Intrinsically safe exhaust fan or blower
- VCI/VpCI Vapor Detection Test Kit
- Flexible ducting to connect to fan/blower
- Respirator, Cartridge, Half Face: 3M 3200 or 6500 series, or equivalent
- Cortec VCI/VpCI Vapor Detection Test Kit
- Cortec VpCI-337 or Cortec VpCI 337-Winterized(when ambient temperatures are below 40F)
- 3M 483 Polyethylene Tape
- flangeDOT+VCI or flangeDOT+Tag+VCI
- Thermo Anemometer
Process:
- Connect exhaust fan and ducting ensuring all other openings are closed except entry/exit points
- Turn on exhaust fan
- Attach VpCI test strip using 3M tape to the outlet of blower/fan/air mover
- Verify cfm is approximately 100 cfm using anemometer
- Fog Cortec VpCI-337 per project fogging procedure ensuring VpCI test strip in outlet turns pink
- Fog the remainder of product per fogging procedure
- Encapsulate entry and outlet opening using flangeDOT+VCI/flangeDOT+Tag+VCI
*Ensure manufacturers short/long term preservation and storage procedures are followed... Follow OEM recommendations where possible*

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