# metal, rigid plastic, and composite IBCs — How often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested

For metal, rigid plastic, and composite IBCs, test or inspection is external visual inspection; interval is initially after production and every 2.5 years; regulation section is 49 CFR § 180.352, recorded from its source on 2026-08-10.

- **Container specification:** metal, rigid plastic, and composite IBCs
- **Test or inspection:** external visual inspection _(our reading, not quoted from the source)_
- **Interval:** initially after production and every 2.5 years _(verified: appears in the quote below)_
- **Regulation section:** 49 CFR § 180.352 _(verified: appears in the quote below)_

## What the source says

> (2) An external visual inspection must be conducted initially after production and every 2.5 years starting from the date of manufacture or the date of a repair conforming to paragraph (d)(1) of this section

## Source

- https://www.law.cornell.edu/cfr/text/49/180.352

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [How often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested](https://referencesource.org/hazmat-container-retest-intervals/).