# -23 Tests of pressure relief valves.

**Citation:** 49 CFR 179.200-23  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Each valve shall be tested by air or gas for compliance with § 179.15 before being put into service.

(b) [Reserved]

[29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, as amended at 62 FR 51561, Oct. 1, 1997]

## Document text

(a) Each valve shall be tested by air or gas for compliance with § 179.15 before being put into service.

(b) [Reserved]

[29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, as amended at 62 FR 51561, Oct. 1, 1997]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.200-23>
- Source ID: `ecfr`
- SHA-256: `2270cf071bc4fdcbe0612f001b3a6e57457facfbc6de20c47846f1d223868ad5`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-22T23:22:08.871Z
- Document slug: `49-cfr-179-200-23`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.200-23",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```