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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. Foggable corrosion inhibitor/equipment and encapsulated with a flangeDOT+VCI or flangeDOT+Tag+VCI can protect project critical mechanical equipment for up to two years.


  • Graco Ultra 395 Airless Sprayer or equivalent with Graco Tip LTX#321 or equivalent (.021 max orifice)
  • Intrinsically safe exhaust fan or blower
  • VCI Test Kit
  • Flexible ducting to connect to fan/blower
  • Respirator, Cartridge, Half Face: 3M 3200 or 6500 series, or equivalent
  • Project approved foggable corrosion inhibitor
  • 3M 483 Polyethylene Tape or equal
  • flangeDOT+VCI or flangeDOT+Tag+VCI
  • Thermo Anemometer



  1. Connect exhaust fan and ducting ensuring all other openings are closed except entry/exit points
  2. Turn on exhaust fan
  3. Attach VCI test strip using 3M tape to the outlet of blower/fan/air mover
  4. Verify cfm is approximately 100 cfm using anemometer
  5. Fog corrosion inhibitor per project fogging procedure ensuring VCI test strip in outlet shows positive
  6. Fog the remainder of product per fogging procedure
  7. 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*



Mechanical Equipment- Encapsulation

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