Nace Rp 0391 Pdf [2021] Jun 2026

The standard emphasizes that no lining performs well on a poorly prepared surface. For steel, this usually means Near-White Metal blast cleaning (SSPC-SP 10) or White Metal (SSPC-SP 5). For concrete, specific moisture content and surface profile requirements are detailed to ensure adhesion.

If you possess the , treat it as a historical reference or for maintaining legacy equipment. Do not use it for new construction.

The standard's title precisely defines its limits:

: Carbon steel is often used because it forms a protective iron-sulfate film in concentrated acid. However, this film is fragile. High flow velocities (above 0.9 m/s or 3 ft/s) can strip it away, leading to rapid, localized corrosion. nace rp 0391 pdf

: Must maintain very low fluid velocity (typically below 0.6 to 0.9 m/s or 2 to 3 ft/s ) to prevent the protective sulfate film from eroding.

The standard emphasizes several design requirements to ensure long-term integrity:

While many NACE standards focus solely on chemical resistance (like RP 0188), RP 0391 addresses the specific niche of . It serves as a comprehensive guide for selecting, specifying, and applying organic linings designed to protect concrete and steel substrates from wear and tear. The standard emphasizes that no lining performs well

It is important to note that NACE/AMPP standards are copyrighted intellectual property.

apply to acid concentrations below 90% or temperatures above 50°C. Supersession

AMPP - The Association for Materials Protection and Performance Document Status If you possess the , treat it as

FRP pipes stored outdoors for >30 days require UV inhibitors or physical covering (tarps, shade structures). What happens in reality: Pipes left in the desert sun for 3 months. Result: resin chalking, fiber blooming, and a 40% loss of hoop strength.

: High-temperature baked phenolic coatings are recommended for protecting smaller storage tanks in the 90-98% range. OSTI (.gov) Related Standards NACE SP0294

Help you find where to the full technical document.