# -3 Type.

**Citation:** 49 CFR 179.200-3  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

Tank built under these specifications must be circular in cross section, with formed heads designed convex outward. When specified in § 179.201-1, the tank must have at least one manway or one expansion dome with manway, and such other external projections as are prescribed herein. When the tank is 

## Document text

Tank built under these specifications must be circular in cross section, with formed heads designed convex outward. When specified in § 179.201-1, the tank must have at least one manway or one expansion dome with manway, and such other external projections as are prescribed herein. When the tank is divided into compartments, each compartment must be treated as a separate tank.

[Amdt. 179-10, 36 FR 21348, Nov. 6, 1971]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.200-3>
- Source ID: `ecfr`
- SHA-256: `8f244f00f408e27fb1354db93adfb9b0550c7f2ae1334a1f7a4c8da202a4fa08`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-23T14:51:43.507Z
- Document slug: `49-cfr-179-200-3`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.200-3",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```