CUI & high temperature
CUI & High-Temperature Coating Solutions for Critical Industrial Assets
Advanced coating systems designed for insulated assets operating under moisture ingress, thermal cycling, high temperature and hidden corrosion risk.
What is CUI?
Hidden corrosion needs systems thinking.
Corrosion Under Insulation is localized corrosion that occurs on metal surfaces hidden beneath insulation and cladding. It is typically driven by moisture ingress, oxygen, salts, chlorides, contaminants and repeated wet-dry or temperature cycling.
Water ingress through damaged cladding, insulation joints or poor sealing.
Trapped moisture, salts and contaminants on the steel surface.
Cyclic operating temperatures that repeatedly wet and dry the system.
Breakdown of conventional coating systems under thermal stress.
Inaccessible surfaces that make inspection and maintenance difficult.
Product highlight
TranaTherm 649CUI
Polymeric matrix CUI and high-temperature coating platform.
- Target assets
- Insulated carbon steel pipelines, vessels, columns, reactors and process equipment.
- Temperature positioning
- Designed for high-temperature service up to 650°C, subject to system design and technical validation.
- Value proposition
- Supports long-term asset protection, improved maintenance planning and lifecycle-focused corrosion strategy.
- Buyer message
- A serious CUI system should be selected based on actual temperature range, insulation design, substrate and operating exposure.
Why conventional systems struggle
CUI exposes weaknesses across the complete system.
Many conventional coating systems struggle in CUI service due to thermal embrittlement, cracking, permeability changes, loss of adhesion, reduced barrier performance and repeated wet-dry exposure. CUI is therefore not only a coating issue; it is a systems issue involving substrate, surface preparation, coating selection, insulation design, temperature profile and maintenance practice.
TranaCorr approach
Service-condition relevance guides the pathway.
TranaCorr approaches CUI by focusing on high-temperature stability, adhesion retention, barrier performance and service-condition relevance. The aim is to support customers with a coating pathway that improves asset reliability and reduces the uncertainty associated with hidden corrosion.
Typical applications
Critical insulated and high-temperature industrial assets.
Refinery and petrochemical insulated pipelines.
Columns, vessels and reactors.
Chemical plant process equipment.
Power plant hot surfaces and insulated assets.
Critical maintenance areas where inspection access is limited.
Technical conversation
A serious CUI system should be selected by service condition.
Final recommendations consider temperature range, insulation design, substrate and operating exposure.