3A, 3AA · Periodic requalification

For 3A, 3AA, test or inspection is Periodic requalification; interval is 5, 10, or 12; minimum test pressure is 5/3 times service pressure, except non-corrosive service; regulation section is 49 CFR § 180.209, recorded from its source on 2026-09-24; source re-checked 2026-09-30.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

3A, 3AA | 5/3 times service pressure, except non-corrosive service ( see § 180.209(g)), or UE 3 | 5, 10, or 12 ( see § 180.209(b), (f), (h), and (j)).

— law.cornell.edu, retrieved 2026-09-24

Source

• law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.209

Last verified against source: 2026-09-30. Due for re-check by 2027-09-30. This page as Markdown · OKF bundle · full dataset as JSON.