Carbon steel tanks require heavy sacrificial corrosion allowances (typically 3.0 mm to 6.0 mm) added directly to the minimum structural wall thickness.
for carbon steel in sulphuric acid.
The primary objective of NACE RP 0391 is to provide a consensus-based framework for the and the design of equipment used to handle concentrated sulfuric acid. nace rp 0391 pdf
Plant operators introduce water into a 96% acid line, causing a drop to 85%.
: Sulfuric acid forms a protective iron-sulfate film on steel. The standard explains that high-velocity flow (over 0.9 m/s) can physically strip this film away, leading to "erosion-corrosion". Plant operators introduce water into a 96% acid
If you have searched for the term , you are likely looking for the official standard dealing with Fiberglass-Reinforced Plastic (FRP) pipelines . Specifically, this standard covers the design, fabrication, storage, handling, and installation of FRP pipe systems used for corrosive service.
NACE RP0391, officially titled provides guidelines for selecting materials, such as carbon steel, to store and handle commercial-grade sulfuric acid. It covers ambient temperatures up to ), which includes risks from solar heating. Key Aspects of the Standard If you have searched for the term ,
Guide to NACE SP0391: Materials for Concentrated Sulfuric Acid Storage
(now updated to NACE SP0391 ) is the essential industry roadmap for handling one of the world's most corrosive chemicals: concentrated sulfuric acid. If you are looking for the NACE SP0391 Standard , it provides the critical engineering guidelines needed to prevent catastrophic tank failures and environmental leaks in chemical processing. The "Vitriol" Challenge: Why This Standard Matters
"All materials, design, fabrication, and inspection shall conform to the requirements of NACE SP0391-2016 (formerly RP0391-2001), Materials for the Handling and Storage of Commercial Concentrated (90 to 100%) Sulfuric Acid at Ambient Temperatures."