DOT 3A, 3A480X, or 4AA480 · Periodic requalification · used exclusively for anhydrous ammonia, commercially free from corroding components, and protected externally by a suitable corrosion-resistant coating (such as paint)
For DOT 3A, 3A480X, or 4AA480, test or inspection is Periodic requalification; condition or service qualifier is used exclusively for anhydrous ammonia, commercially free from corroding components, and protected externally by a suitable corrosion-resistant coating (such as paint); interval is every 10 years instead of every five years; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06; source re-checked 2026-09-30.
- Container specification
- DOT 3A, 3A480X, or 4AA480 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 anhydrous ammonia, commercially free from corroding components, and protected externally by a suitable corrosion-resistant coating (such as paint) verified
- Regulation section
- 49 CFR § 180.209
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, 3A480X, or 4AA480 used exclusively for anhydrous ammonia, commercially free from corroding components, and protected externally by a suitable corrosion-resistant coating (such as paint) may be requalified every 10 years instead of every five years.
— law.cornell.edu, retrieved 2026-08-06
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.209