Every 5-7 years. The last major revision was 2018. Reaffirmed in 2023. Next major revision expected 2025-2026.
: Offers NACE RP0391-2001 for those needing historical compliance data. nace rp 0391 pdf
: Options for storage tanks, piping, or valves. 2. Decision Logic (Based on NACE Standards) Every 5-7 years
One of the most valuable parts of the PDF is the guidance on inspection. It defines how to check for holidays (pinholes), thickness, and adhesion. Because these linings are often applied in thick films, standard inspection methods for thin-film paints may not apply. Next major revision expected 2025-2026
: The official AMPP website provides the latest SP0391-2016 version.
Today, this standard has been updated and redesignated as , but the core principles remain vital for anyone managing acid storage and transport systems. Understanding NACE RP0391 (now SP0391)