Corrosion Under Insulation (CUI) is a notorious, often invisible threat in petrochemical, oil, gas, and power generation industries. Because it occurs hidden beneath thermal insulation or fireproofing materials, it can lead to catastrophic equipment failure, unexpected shutdowns, and severe safety hazards. The standard is the industry’s definitive guide to mitigating this problem.
Identify all insulated lines and equipment. Map out their operating temperatures, noting cyclic systems which present the highest risk. Step 2: Surface Preparation nace sp0198 pdf
For maintenance personnel looking for a guide on what to do in the field, this is the most valuable section. Corrosion Under Insulation (CUI) is a notorious, often
Note: Thermal Spray Aluminum (TSA) is widely highlighted in the standard as an exceptionally durable, long-term solution for both carbon and stainless steels operating in volatile thermal cycling environments. 5. Industrial Best Practices for CUI Management Identify all insulated lines and equipment
Equipment headers, brackets, and pipe supports should be designed to shed water rather than pool it against the insulation jacket.
The standard is organized into several functional sections, each addressing a different facet of the CUI problem:
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