# -24 Tests of pressure relief valves.

**Citation:** 49 CFR 179.220-24  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

Each safety relief valve must be tested by air or gas for compliance with § 179.15 before being put into service.

[Amdt. 179-9, 36 FR 21343, Nov. 6, 1971, as amended at 62 FR 51561, Oct. 1, 1997]

## Document text

Each safety relief valve must be tested by air or gas for compliance with § 179.15 before being put into service.

[Amdt. 179-9, 36 FR 21343, Nov. 6, 1971, as amended at 62 FR 51561, Oct. 1, 1997]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.220-24>
- Source ID: `ecfr`
- SHA-256: `0429523925d01d0825bccef7cb88d258fb367293db20a82fe4fc3c09764c26d0`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-23T19:16:07.420Z
- Document slug: `49-cfr-179-220-24`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.220-24",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```