: Provides procedures for applying internal coating systems to railroad tank cars used for acid transport. 5. Accessing the NACE RP 0391 PDF
: "Ambient" temperatures are defined as those up to 50°C (120°F) , accounting for solar heating in tropical climates.
ANSI Webstore : Offers preview pages and full PDF purchase for the 2001 version. nace rp 0391 pdf
: It specifically covers acid strengths between 90% and 100% by weight.
: Specifically covers the design, fabrication, and inspection of sulfuric acid storage tanks. : Provides procedures for applying internal coating systems
The keyword refers to a critical industrial standard practice published by NACE International (now part of AMPP ) titled "Materials for the Handling and Storage of Commercial Concentrated (90 to 100%) Sulfuric Acid at Ambient Temperatures."
: The standard is intended for stationary storage tank systems, including internal piping and associated recirculation loops. 2. Carbon Steel: The Primary Material ANSI Webstore : Offers preview pages and full
: Because sulfuric acid is highly hygroscopic (it absorbs water from the air), storage systems must include desiccant dryers on vents to prevent the acid from diluting. Diluted acid (below 77%) is far more corrosive to carbon steel. 4. Comparison with Related Standards