Intertek Inform : Provides historical and current versions of the standard. ANSI Webstorehttps://webstore.ansi.org NACE Standard RP0391-2001 - ANSI Webstore
: When carbon steel contacts concentrated acid, it initially corrodes but quickly forms an insoluble sulfate layer that limits further attack.
: Specifically covers the design, fabrication, and inspection of sulfuric acid storage tanks. nace rp 0391 pdf
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."
NACE RP 0391 outlines several technical requirements to ensure the mechanical integrity of acid systems: Intertek Inform : Provides historical and current versions
ANSI Webstore : Offers preview pages and full PDF purchase for the 2001 version.
: This protective film is fragile. The standard recommends maintaining acid flow velocities below 0.9 m/s (3 ft/s) to prevent "velocity-accelerated corrosion" where the film is physically stripped away. The keyword refers to a critical industrial standard
: Provides procedures for applying internal coating systems to railroad tank cars used for acid transport. 5. Accessing the NACE RP 0391 PDF
: It specifically covers acid strengths between 90% and 100% by weight.
AMPP (formerly NACE) Store : The official source for the most current edition, now listed as SP0391.