CORROSION UNDER INSULATION CUI Inspection Process Overview

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CORROSION UNDER INSULATION (CUI Inspection
Process Overview)

• Perform temperature surveys at TML holes for all
  insulated equipment within each Unit and pipe
  rack.
• Visually inspect insulation during temp survey
  and ID damaged areas, mastic wrap, any items
  protruding through insulation jacketing such as
  bleeders, piping supports, etc.
• Items 300F and less are surveyed with backscatter
  equipment.
• From backscatter survey, ID areas for insulation
  removal.

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Neutron Backscatter Overview

• Neutron backscatter operates by emitting
  neutrons into the equipment being tested. The
  higher energy neutrons are moderated by collision
  with hydrogen atoms in trapped moisture within
  the insulation (fireproofing). These moderated
  neutrons are then counted. Wet insulation will
  produce a higher count per unit of time than dry
  insulation.

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Neutron Backscatter Influence Variables

• Time of shot count
• Insulation type and thickness
• Humidity levels (2ft radius of influence)
• Hydrocarbon levels (2ft radius of influence)
• Shot location and number of shots taken
• Accessibility of Equipment Piping
• Equipment orientation (small vs. large)

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CUI Program Statistical Data

• 76.8 of areas stripped active corrosion was
  found.
• 10 of areas stripped have active corrosion
  severe enough for replacement.
• 27 recorded shots per/100 ft.
• Number of insulated equipment average per unit
  (15)
• Approximately 1100 recordable shots taken per 15
  pieces of insulated equipment and associated
  piping.
• Between 5K and 9K per 15 pieces of equipment
  and associated piping

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MCM-2 NEUTRON BACKSCATTER MOISUTURE DETECTOR
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CUI SURVEY RESULTS
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CUI SURVEY RESULTS
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MISSION STATEMENT

• Advanced Corrosion Technologies Training
  L.L.C. is on a mission to become the first
  Technology and Training driven organization to
  implement a proactive methodology in determining
  areas of corrosion mechanisms before they become
  issues. We are a company of Ideas, Experience,
  and Integrity which allows us to be a leader in
  the inspection technology and training industry.
  The success of our efforts will be directly
  driven by the employees who perform the work and
  invent the ideas. EMAT technology is first in a
  series of inspection methods and tools that will
  lead us in becoming a pioneer in Advanced
  Corrosion Detection and Prevention.