# flexible, fiberboard, or wooden IBCs — How often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested

For flexible, fiberboard, or wooden IBCs, test or inspection is Visual inspection; interval is prior to first use and permitted reuse; regulation section is 49 CFR § 180.352, recorded from its source on 2026-08-10.

- **Container specification:** flexible, fiberboard, or wooden IBCs _(verified: appears in the quote below)_
- **Test or inspection:** Visual inspection _(our reading, not quoted from the source)_
- **Interval:** prior to first use and permitted reuse _(verified: appears in the quote below)_
- **Regulation section:** 49 CFR § 180.352 _(verified: appears in the quote below)_

## What the source says

> Visual inspection for flexible, fiberboard, or wooden IBCs. Each IBC must be visually inspected prior to first use and permitted reuse

## 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/).