Piping Asset Preservation for Mechanical Equipment

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:

1. Connect exhaust fan and ducting ensuring all other openings are closed except entry/exit points
2. Turn on exhaust fan
3. Attach VpCI test strip using 3M tape to the outlet of blower/fan/air mover
4. Verify cfm is approximately 100 cfm using anemometer
5. Fog Cortec VpCI-337 per project fogging procedure ensuring VpCI test strip in outlet turns pink
6. Fog the remainder of product per fogging procedure
7. Encapsulate entry and outlet opening using flangeDOT+VCI/flangeDOT+Tag+VCI