AMPP - The Association for Materials Protection and Performance Scope and Application Acid Concentration:
By respecting the technical depth of NACE RP 0391, you ensure that your FRP pipelines survive their intended service life—resisting both internal corrosion and external mechanical damage. That is the true value of owning and applying the official PDF. nace rp 0391 pdf
: 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 AMPP - The Association for Materials Protection and
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. Best Practices for Acid Handling One of the
Threaded or socket-welded piping should be avoided due to the potential for localized turbulence.
The NACE RP 0391 standard covers several essential topics related to internal CP of steel pipelines:
This standard does not apply to acid concentrations below 90% or temperatures exceeding 50°C. GlobalSpec Key Technical Guidance Material Selection: