Overview — NACE RP 0391

Scope:

It covers commercial concentrated sulfuric acid (90% to 100% concentration) at ambient temperatures , typically defined as up to 50°C (120°F) .

As this is a copyrighted technical document, it is not legally available for free download. Official copies can be purchased through authorized distributors:

Is this for a new installation or existing maintenance?

If you are dealing with a specific material issue, let me know: Are you dealing with sulfuric acid concentration below 90%?

• Use cement mortar lining or NSF/ANSI-certified epoxy lining suited for potable water.
• For CML: strict control of mixture, thickness (per standards), and curing; ensure surface is clean and free of loose rust.
• For epoxy: verify NSF certification, thickness, adhesion, and low-VOC production if applied in-field.

(formerly NACE International). You can obtain the official document through these sources: AMPP Store The primary source for the active SP0391 standard. ANSI Webstore