Nace Rp 0391 Pdf

: You can buy the authorized digital version through the AMPP Store or the Accuris Standards Store.

: 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

High velocities can strip the protective iron sulfate layer from steel, leading to localized corrosion. The standard suggests designing piping systems to maintain lower velocities, particularly near inlets. 3. Preventing Moisture Absorption nace rp 0391 pdf

Concentrated sulfuric acid forms a protective iron sulfate film on carbon steel at ambient temperatures.

The (now updated and designated as NACE SP0391 ) provides comprehensive industry guidelines for the selection of materials, design, and fabrication of systems used to handle and store commercial concentrated sulfuric acid ( H2SO4cap H sub 2 cap S cap O sub 4 : You can buy the authorized digital version

: All weldments must be free of slag, porosity, or mill scale, as these defects act as initiation points for localized attack. Where to Find the Official PDF

Originally approved in 1991 and revised in 2001, this "Standard Practice" (SP) addresses the specific challenges of handling concentrated sulfuric acid ( H2SO4cap H sub 2 cap S cap O sub 4 The standard suggests designing piping systems to maintain

: Specifically covers the design, fabrication, and inspection of sulfuric acid storage tanks.

Defines where carbon steel is suitable and where corrosion rates become unacceptable.

Fusion-Bonded Epoxy (FBE)