What is the method?
CUI refers to corrosion hidden beneath insulation systems, cladding, lagging, or protective coverings. Inspection is carried out using methods such as UT, profile radiography, pulsed eddy current, guided wave testing, thermography, and selective insulation removal.
Application
CUI refers to corrosion hidden beneath insulation systems, cladding, lagging, or protective coverings. Inspection is carried out using methods such as UT, profile radiography, pulsed eddy current, guided wave testing, thermography, and selective insulation removal.
Key Benefits
- Helps identify hidden corrosion before failure occurs.
- Supports risk-based inspection planning.
- Reduces unnecessary insulation removal when screening is properly applied.
- Improves long-term integrity management of insulated assets.
Inspection Capabilities
- Specifically targets hidden external corrosion mechanisms not visible during routine external inspection.
- Allows selective inspection of high-risk zones without stripping all insulation.
- Particularly useful for temperature-dependent, moisture-retaining, or ageing insulation systems.
- Supports strategic corrosion management across large insulated asset populations.
Limitations
- Damage is hidden and often highly localised.
- No single method is suitable for every insulation type and service condition.
- Local insulation removal is often needed for confirmation.
- Access, scaffolding, and plant conditions can influence inspection cost and duration.