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

For metal, rigid plastic and composite IBC, test or inspection is internal inspection; interval is at least every five years; regulation section is 49 CFR § 180.352, recorded from its source on 2026-08-10.

- **Container specification:** metal, rigid plastic and composite IBC _(verified: appears in the quote below)_
- **Test or inspection:** internal inspection _(our reading, not quoted from the source)_
- **Interval:** at least every five years _(verified: appears in the quote below)_
- **Regulation section:** 49 CFR § 180.352 _(verified: appears in the quote below)_

## What the source says

> (3) Each metal, rigid plastic and composite IBC must be internally inspected at least every five years to ensure that the IBC is free from damage and to ensure that the IBC is capable of withstanding the applicable design qualification tests.

## 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/).