Reference Source

All insulated cargo tanks, except MC 330, MC 331, MC 338

For All insulated cargo tanks, except MC 330, MC 331, MC 338, test or inspection is Internal Visual Inspection; interval is 1 year; regulation section is 49 CFR § 180.407, recorded from its source on 2026-08-10.

Container specification
All insulated cargo tanks, except MC 330, MC 331, MC 338 verified
Test or inspection
Internal Visual Inspection our reading
Interval
1 year. verified
Regulation section
49 CFR § 180.407 verified
Sourcelaw.cornell.edu
Verified
Review by
DatasetHow often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested

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

Internal Visual Inspection: | | | All insulated cargo tanks , except MC 330, MC 331, MC 338 (see Note 4) | September 1, 1991 | 1 year.

law.cornell.edu, retrieved 2026-08-10

Source

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