# -5 Pressure and leakage test.

**Citation:** 49 CFR 178.347-5  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Each cargo tank must be tested in accordance with § 178.345-13 and this section.

(b) Pressure test. Test pressure must be as follows:

(1) Using the hydrostatic test method, the test pressure must be at least 40 psig or 1.5 times tank MAWP, whichever is greater.

(2) Using the pneumatic test me

## Document text

(a) Each cargo tank must be tested in accordance with § 178.345-13 and this section.

(b) Pressure test. Test pressure must be as follows:

(1) Using the hydrostatic test method, the test pressure must be at least 40 psig or 1.5 times tank MAWP, whichever is greater.

(2) Using the pneumatic test method, the test pressure must be 40 psig or 1.5 times tank MAWP, whichever is greater, and the inspection pressure is tank MAWP.

[Amdt. 178-89, 54 FR 25030, June 12, 1989. Redesignated by Amdt. 178-112, 61 FR 18934, Apr. 29, 1996]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-178.347-5>
- Source ID: `ecfr`
- SHA-256: `7ede5352cf3b76deff264fb50c832435769c861cbaf4ff3935dfd86edf2dbeba`
- Retrieved: 2026-08-20T05:46:20.151Z
- Exported: 2026-08-23T11:40:36.735Z
- Document slug: `49-cfr-178-347-5`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "178",
  "section": "178.347-5",
  "subpart": "Subpart J—Specifications for Containers for Motor Vehicle Transportation",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```