Materials treated to repel water (e.g., hydrophobic silica aerogel, expanded perlite) reduce liquid water contact with the metal.
The 2016 revision of NACE SP0198 (often referred to as NACE SP0198-2016) introduced several key updates:
Implement regular, non-destructive, and visual inspections based on the risk of the operating environment.
Create a written, risk-based inspection program.
: Outlines the necessity of conducting a thorough survey before installing a CP system.
NACE SP0198 emphasizes that preventing CUI cannot rely on coatings alone; it requires synchronization between multiple engineering disciplines. 1. Protective Coatings (The Primary Line of Defense)
Account for cyclic temperature spikes or steam-out conditions. Thermal Limits
The standard is applied to piping, vessels, and tanks to prevent CUI in high‑temperature and cyclic environments.
Cost: As of 2025, the standard typically costs between $150–$250 for members (AMPP membership is highly recommended if you buy multiple standards per year).