4B, 4BA, 4BW, 4B-240ET · Periodic requalification

For 4B, 4BA, 4BW, 4B-240ET, test or inspection is Periodic requalification; interval is 5, 7, 10, or 12; minimum test pressure is 2 times service pressure, except non-corrosive service; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06; 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

4B, 4BA, 4BW, 4B-240ET | 2 times service pressure, except non-corrosive service ( see § 180.209(g)) | 5, 7, 10, or 12 ( see § 180.209(e), (f), and (j)).

— law.cornell.edu, retrieved 2026-08-06

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.