Solutions for Corrosion Under Insulation

Acuren offers a fully integrated and comprehensive approach to detecting and solving corrosion under insulation challenges backed by engineers and corrosion specialists with years of experience.

What is Corrosion Under Insulation (CUI)?

CUI (Corrosion Under Insulation) is external degradation on a component as a result of water trapped under insulation or fireproofing. CUI can affect carbon steels, low alloy steels, 300 series stainless steels, and even duplex stainless steels. CUI typically affects equipment that operates continuously or intermittently between:

• Carbon & low alloy steels: -12°C (10°F) to 175°C (350°F)
• Austenitic and duplex stainless steels: 60°C (140°F) to 205°C (400°F)

Corrosion Under Insulation (CUI) is a damage mechanism that affects all industrial facilities. Failure of in-service equipment can be catastrophic and extremely costly. Current industry practices for detection and mitigation are inefficient and expensive. Acuren is thinking outside the box, pioneering alternative strategies for tackling this common but costly problem.

Acuren leads the industry as the one true supplier that can be the single turnkey vendor to execute comprehensive CUI programs.

Engineering Solutions and Programs

• CUI program development
• Corrosion engineering, materials selection, mitigation solutions
• Manual development on inspection & mitigation of CUI
• Perform engineering threat assessments
• Experienced in-house corrosion engineering capabilities
• Equipment condition assessment – RSTRENG / APCAT Calculations
• Fitness for service assessments (e.g. API 579)
• Repair plan development
• Create and implement Risk Based Inspection (RBI) programs
• Finite Elemental Analysis (FEA)

Visual Inspection

• Experienced visual inspectors perform external inspections of equipment:
  • RBI (API 580/API 581)
  • Piping (API 570)
  • Pressure Vessels (API 510)
  • Boilers (NBIC, ABSA)
  • Structural
  • Other
• Asset integrity management
• Assess for CUI potential
• Selection of suitable NDE method(s)
• Circuitize piping, select condition monitoring locations (CML’s)

All Inspection, NDE & Industrial Services Can Be Provided From Ropes

Acuren NDE Methods for CUI Inspection

• • • Moisture Detection Imaging (MDI) – Neutron Backscatter Pulsed Eddy Current (PEC)
    • Radiography
      • Real Time Radiography (RTR)
      • Computed Radiography (CR)
      • Digital Radiography (DR)
    • Guided Wave Ultrasonic (GUL)
    • Infrared Thermography (IR) Laser Scanning
    • Advanced Ultrasonic Inspection
      • PAUT
      • TOFD
      • AUT
    • Ultrasonic Thickness (UT) Measurements

Rope Access and Industrial Solutions

• • • Where scaffold or other means of access are not practical, Acuren can utilize rope access means to assess CUI (e.g. modular piping, towers, stacks).
    • All inspection, NDE and industrial services can be provided from ropes.

• • • Journeyman Insulators
      • Insulation removal/repairs
      • Insulation installation
      • Asbestos abatement
      • CML ports installed
      • Fireproofing
    • Repairs/Replacement
      • Welding and fabrication
      • Pipefitting
    • Pressure cleaning and blasting
    • Coatings – NACE Inspectors, coating removal and recoating
    • Electrical and instrumentation

Brochure Download

Brochure Download