Nace Sp0198 Pdf Jun 2026

Using an outdated standard is dangerous. If you design a coating system based on a revoked clause, you risk coating failure, multimillion-dollar repairs, or environmental disaster.

NACE SP0198 outlines how different insulation materials behave when moisture enters the system. It offers guidance on selecting insulation types (such as hydrophobic aerogel, cellular glass, calcium silicate, or mineral wool) based on their water-retention properties and chemical neutrality. For example, using insulation with low leachable chlorides is strictly mandated when insulating stainless steel to prevent CISCC. 3. Mechanical Design and Jacketing

NACE SP0198 emphasizes that coatings are only one part of the solution. The standard also addresses mechanical design and insulation selection to keep water out of the system entirely.

If you are using SP0198, pay special attention to these sections: nace sp0198 pdf

If you don’t need the full standard yet, consider reading AMPP’s free technical committee reports or purchasing only the necessary sections via their “Build a Standard” tool.

The standard explicitly states that the single most effective weapon against CUI is an immersion-grade protective coating applied directly to the metal substrate before insulation. Because insulation will eventually hold water, the coating must withstand continuous hot water immersion and thermal cycling. 2. Insulation Material Selection

-4°C to 175°C (25°F to 350°F), with the peak corrosion rate occurring around 60°C to 90°C (140°F to 194°F). Using an outdated standard is dangerous

Ensure that NACE/AMPP certified inspectors verify surface cleanliness, profile depth, ambient application conditions, and Dry Film Thickness (DFT) during installation. Conclusion

: The standard adopts a comprehensive view, recognizing that CUI involves multiple technologies, including coatings, insulation types, and equipment design.

Water evaporates quickly, reducing the corrosion risk, although specialized coatings are required for cyclic temperatures. 1. Protective Coatings Under Insulation It offers guidance on selecting insulation types (such

: Installation must adhere to rigorous standards to ensure effectiveness and longevity.

CUI occurs when moisture becomes trapped between an insulation layer and the underlying metal surface. Because the system is covered, visual inspection is impossible without removing the cladding and insulation.

(formally titled Standard Practice Control of Corrosion on Steel, Fixed Offshore Structures Associated with Petroleum Production ) is a crucial industry document published by NACE International (now part of AMPP: The Association for Materials Protection and Performance).

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