Understanding the standard's lineage is useful when reviewing older plant designs or specifications. You may encounter the following versions:
Complete Technical Guide to NACE RP0391 / SP0391: Materials for Concentrated Sulfuric Acid Storage and Handling
The standard covers several key components of storage systems: 1. Carbon Steel Performance nace rp 0391 pdf
. It is primarily used by engineers and maintenance personnel in the chemical process industries to select safe, cost-effective materials for systems handling sulfuric acid.
Establish best practices for fabrication and welding to prevent premature failure. Key Technical Insights in the Document It is primarily used by engineers and maintenance
: For severe conditions, the standard suggests alternatives like Cast Alloy 20 (CN7M) for valves and pumps, or fluoropolymer linings like PTFE for 98% acid and PVDF for 93% acid. Best Practices for Acid Handling
: Suggests 304 or 316L stainless steel for transfer piping or areas where flow velocity is high. Best Practices for Acid Handling : Suggests 304
: Designed for ambient temperatures up to 120°F (50°C) . This limit accounts for environmental and solar heating in tropical climates. Higher temperatures require entirely different metallurgical considerations due to exponentially higher corrosion rates. 2. Core Corrosion Dynamics of Concentrated Sulfuric Acid Understanding how H2SO4cap H sub 2 cap S cap O sub 4
