# -11 Loading and unloading valves.

**Citation:** 49 CFR 179.500-11  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Loading and unloading valve or valves shall be mounted on the cover or threaded into the marked end of tank. These valves shall be of approved type, made of metal not subject to rapid deterioration by lading or in service, and shall withstand without leakage a pressure equal to the marked test p

## Document text

(a) Loading and unloading valve or valves shall be mounted on the cover or threaded into the marked end of tank. These valves shall be of approved type, made of metal not subject to rapid deterioration by lading or in service, and shall withstand without leakage a pressure equal to the marked test pressure of tank. Provision shall be made for closing service outlet of valves.

(b) [Reserved]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.500-11>
- Source ID: `ecfr`
- SHA-256: `9ee2643be8c1a32ec82b9384cf4da9c5d05a29de87589b3dfb1f09bc39cb4240`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-24T14:24:26.663Z
- Document slug: `49-cfr-179-500-11`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.500-11",
  "subpart": "Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```