Carbon steel is commonly used for storing concentrated sulfuric acid at ambient temperatures due to its economic viability and the formation of a protective iron sulfate film. However, NACE SP0391 outlines specific requirements for its safe use:
NACE RP0391-91, titled "Materials for the Handling and Storage of Concentrated Sulfuric Acid and Oleum," is a pivotal Recommended Practice (RP) in the world of corrosion engineering and industrial chemical handling. Published by NACE International (now part of AMPP), this document provides essential guidelines for selecting materials and designing systems that can safely withstand one of the most widely used—and corrosive—chemicals in the world. Scope and Purpose of NACE RP0391
NACE International updates standards every 5 years to reflect new industry research, failure data, and safety regulations.
Historically used for their resistance, though lead is less common today due to environmental and health concerns. Design and Maintenance Best Practices nace rp 0391 pdf
This passive film is structurally weak. If the fluid velocity exceeds roughly 2 to 3 feet per second (0.6 to 0.9 m/s), the flowing acid mechanically shears the film away, causing rapid, catastrophic corrosion rates. Stainless Steel and High Alloys
For areas where carbon steel fails or where high purity is required, is the premium choice.
Beyond material selection, the RP touches on the safety of the handling system. It includes advice on gasket materials (often PTFE-based) and pump configurations that minimize the risk of catastrophic leaks. Why the PDF Version is Sought After Carbon steel is commonly used for storing concentrated
This article provides a comprehensive analysis of the standard's scope and history, detailed technical requirements, revision status, guidance on obtaining the official PDF, and the relationship between RP0391 and related NACE documents like RP0205 and the MR0175 family.
The official NACE RP0391 Document Structure covers the entire life cycle of chemical handling systems:
NACE RP0391 is a standard practice developed by the National Association of Corrosion Engineers (NACE) that provides guidelines for the protection of steel pipelines and other metallic structures from corrosion using cathodic protection (CP) systems. Scope and Purpose of NACE RP0391 NACE International
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.
(Revised as NACE SP0391, now AMPP SP0391) stands for: "Standard Practice—Materials, Fabrication, and Handling of Fiberglass-Reinforced Plastic (FRP) Pipelines for Onshore Corrosive Service."
You can download a pdf copy of NACE RP 0391 from the NACE International website or other reliable sources.
Used for subsea manifolds and tubing due to high pitting resistance.
If you manage to access the full document, here are the critical sections you should pay attention to:
Anything and everything you’re looking for to grow your business.
.png)
.webp)
