Reference Source

Specification 51 portable tank

For Specification 51 portable tank, test or inspection is periodic inspection and test; interval is at least once every five years; regulation section is 49 CFR § 180.605, recorded from its source on 2026-08-10.

Container specification
Specification 51 portable tank verified
Test or inspection
periodic inspection and test our reading
Interval
at least once every five years verified
Regulation section
49 CFR § 180.605 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

(2) Each Specification 51 portable tank must be given a periodic inspection and test at least once every five years.

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

Source

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