Important Disclaimer: Before proceeding, please note that NACE RP0391 has been officially withdrawn and superseded. It was replaced by NACE SP0391, which was later designated as AMPP SP0391 (due to the merger of NACE and SSPC into AMPP). While the PDF may still be found in older archives or referenced in legacy specifications, it is no longer the current industry standard. Always consult the latest version (AMPP SP0391) for new projects.
Yes, provided the resin is hydrocarbon-resistant. The standard covers FRP for hydrocarbon service, but check for specific fuel-grade additives.
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.
Before you apply your next lining system, consult the guidelines within RP 0391. The cost of the document is negligible compared to the cost of an unplanned shutdown caused by premature lining failure.
Disclaimer: This blog post is for informational purposes only. Always consult the official AMPP documentation and a qualified corrosion engineer for specific project requirements.
NACE RP0391 (now often referred to as SP0391) is a technical standard titled "Materials for the Handling and Storage of Commercial Concentrated (90 to 100%) Sulfuric Acid at Ambient Temperatures". Accessing the Full Text nace rp 0391 pdf
Because NACE standards are copyrighted intellectual property, the full text is generally not available for free through legal public repositories. You can obtain the official document through these channels:
Official Purchase: The most recent version, SP0391-2016, can be purchased from authorized retailers like the ANSI Webstore or Intertek Inform.
Third-Party Platforms: Sites like Scribd often host community-uploaded copies, though these may be older versions (e.g., 2001 or 2004) and require a subscription to download. Summary of Key Content
The standard provides essential guidelines for managing the high corrosion risks associated with concentrated sulfuric acid:
Scope: It covers commercial concentrated sulfuric acid (90% to 100% concentration) at ambient temperatures, typically defined as up to 50°C (120°F). Typical inspection and test methods referenced
Material Selection: It details the performance and limitations of various materials, such as carbon steel, which forms a protective ferrous sulfate (FeSO4) layer in concentrated acid, though it remains vulnerable to high flow rates or turbulence.
Design Considerations: The document includes specific recommendations for storage tank design, piping systems, and the use of specialized alloys or plastics in specific sections of the handling process.
Corrosion Protection: It outlines factors that accelerate corrosion, such as "hydrogen grooving" or weld attack, and suggests preventive maintenance practices.
For further technical details, researchers often refer to secondary summaries found in ResearchGate reviews or industry handbooks that cite the standard's core requirements. NACE Standard RP0391-2001 - ANSI Webstore
Understanding the standard is one thing; applying it is another. Here are three real-world scenarios where consulting the nace rp 0391 pdf is mandatory. Visual inspection and film thickness gauging (magnetic or
The standard says: Backfill must be sand or fine soil, pH 5–9, no sharp aggregate. What happens in reality: Native soil with limestone or slag is used to save cost. Result: point-loading stress fractures after backfill compaction.
Carbon steel is the most common material for concentrated HF storage and piping. The guide explains the phenomenon of "passivation."
A legitimate PDF of NACE RP 0391 is approximately 20–30 pages and organized into the following critical sections.
The document provides guidelines for: