Nace Rp 0391 Pdf Updated Site
Materials for handling and storing commercial concentrated sulfuric acid. Concentration Range: 90% to 100%
NACE RP 0391 is a recommended practice (RP) document that outlines the requirements for evaluating corrosion inhibitors used in oil and gas operations. The document provides a comprehensive framework for testing and evaluating the performance of corrosion inhibitors in various environments, including oil production, gas processing, and transportation systems. The standard covers a range of topics, including laboratory testing, field testing, and performance criteria for corrosion inhibitors.
Highly vulnerable to dilution from atmospheric moisture. Absorbed moisture thins the acid, destroying the passive film. 2. Ductile Iron and Alloyed Cast Irons
(The exact table of contents and wording depend on the edition; consult the official PDF for authoritative requirements.) nace rp 0391 pdf
The standard emphasizes several design requirements to ensure long-term integrity:
Addresses velocity effects, contamination, and moisture absorption (hygroscopic nature). Technical Guidelines for Sulfuric Acid Storage
: Historical, superseded iterations often found on archival download networks. The standard covers a range of topics, including
Production fluids often contain Hydrogen Sulfide ( H2Scap H sub 2 cap S ), Carbon Dioxide ( CO2cap C cap O sub 2 ), and high concentrations of chlorides.
Epoxy Liners (plural-component)
NACE RP0391/SP0391 covers three primary aspects: including extreme hygroscopic nature
) between 90% and 100% concentration by mass at ambient temperatures up to 50°C (120°F) . Originally compiled by NACE Task Group T-5A-18 and updated through the Association for Materials Protection and Performance (AMPP), this standard serves as a critical safety and mechanical reference for the chemical process industries (CPI). Managing concentrated sulfuric acid requires highly specific engineering controls due to its unique chemical anomalies, including extreme hygroscopic nature, exothermic dilution properties, and flow-velocity velocity effects.
The guide generally cautions against the use of standard stainless steels (like 304 or 316) for HF service. They can suffer from pitting and stress corrosion cracking in specific concentrations.
NACE RP 0391 is more than just a document; it is a blueprint for extending the life of your assets in some of the harshest environments imaginable. Whether you are dealing with coal slurry, phosphate rock, or chemical effluents with high solids content, ignoring the abrasion factor can lead to catastrophic failure.