# a specification listed in the table in this paragraph (g) — How often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested

For a specification listed in the table in this paragraph (g), test or inspection is complete external visual inspection; interval is at five-year intervals after the first inspection; condition or service qualifier is used exclusively in the service indicated; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06.

- **Container specification:** a specification listed in the table in this paragraph (g) _(verified: appears in the quote below)_
- **Test or inspection:** complete external visual inspection _(our reading, not quoted from the source)_
- **Interval:** at five-year intervals after the first inspection _(verified: appears in the quote below)_
- **Condition or service qualifier:** used exclusively in the service indicated _(verified: appears in the quote below)_
- **Regulation section:** 49 CFR § 180.209 _(verified: appears in the quote below)_

## What the source says

> A cylinder conforming to a specification listed in the table in this paragraph (g) and used exclusively in the service indicated may, instead of a periodic hydrostatic test, be given a complete external visual inspection at the time periodic requalification becomes due. External visual inspection must be in conformance with CGA C-6 or C-6.3, as applicable. When this inspection is used instead of hydrostatic testing, subsequent inspections are required at five-year intervals after the first inspection.

## Source

- https://www.law.cornell.edu/cfr/text/49/180.209

Last verified: 2026-08-06. Review by: 2027-08-06.
Part of [How often hazmat cylinders, cargo tanks, IBCs and portable tanks must be retested](https://referencesource.org/hazmat-container-retest-intervals/).