DOT 3A, 3AA, 3B, 4BA, or 4BW
For DOT 3A, 3AA, 3B, 4BA, or 4BW, test or inspection is Periodic requalification; interval is every 10 years instead of every five years; condition or service qualifier is used exclusively for methyl bromide; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06.
- Container specification
- DOT 3A, 3AA, 3B, 4BA, or 4BW verified
- Test or inspection
- Periodic requalification our reading
- Interval
- every 10 years instead of every five years verified
- Condition or service qualifier
- used exclusively for methyl bromide verified
- Regulation section
- 49 CFR § 180.209 verified
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
A cylinder conforming to specification DOT 3A, 3AA, 3B, 4BA, or 4BW having a service pressure of 300 psig or less and used exclusively for methyl bromide, <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=d496477211992c9631bc3d13ef381c7e&term_occur=999&term_src=Title:49:Subtitle:B:Chapter:I:Subchapter:C:Part:180:Subpart:C:180.209> liquid ; mixtures of methyl bromide and ethylene dibromide, liquid ; mixtures of methyl bromide and chlorpicrin, liquid ; mixtures of methyl bromide and petroleum solvents, liquid ; or methyl bromide and nonflammable, nonliquefied compressed gas mixtures , liquid ; commercially free of corroding components, and protected externally by a suitable corrosion resistant coating (such as galvanizing or painting) and internally by a suitable corrosion resistant lining (such as galvanizing) may be tested every 10 years instead of every five years, provided a visual internal and external examination of the cylinder is conducted every five years in accordance with CGA Pamphlet C-6.
— law.cornell.edu, retrieved 2026-08-06
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.209