Nace Rp 0391 Pdf Patched (2025)

NACE RP 0391 is a Recommended Practice published by NACE International (now AMPP) that gives guidance on evaluating, selecting, applying, and testing coatings for the internal protection of metallic pipelines and piping systems handling various fluids. It focuses on corrosion control inside pipelines (e.g., water, oil, gas, produced water) where internal coatings, linings, and auxiliary measures (pigging, corrosion inhibitors) are used to extend service life and reduce maintenance.

acid is significantly more corrosive and has a higher freezing point ( 45∘F45 raised to the composed with power F 7∘C7 raised to the composed with power C

The standard provides tables for:

: High velocity or localized turbulence (near elbows, tees, or valves) strips away the iron sulfate film, exposing bare steel to rapid, catastrophic erosion-corrosion. Hydrogen Grooving

The standard identifies specific materials based on the acid concentration and equipment type. Carbon Steel : The primary choice for concentrations between nace rp 0391 pdf

While the "NACE RP 0391 PDF" is tempting to search for free, the risk of outdated information or malware isn't worth it. Budget for the $200 purchase from AMPP—it is cheaper than replacing a corroded fly ash silo.

For extreme velocity or slight temperature spikes, proprietary high-silicon stainless steels (e.g., SX alloy) or nickel-base alloys (e.g., Alloy 20, Hastelloy C276) are specified. NACE RP 0391 is a Recommended Practice published

Concentrated sulfuric acid forms a protective iron sulfate film on carbon steel at ambient temperatures.