# a-2 Type and size.

**Citation:** 49 CFR 178.33a-2  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Single-trip inside containers. Must be seamless, or with seams welded, soldered, brazed, double seamed, or swedged.

(b) The maximum capacity of containers in this class shall not exceed 1 L (61.0 cubic inches). The maximum inside diameter shall not exceed 3 inches.

[Order 71, 31 FR 9074, July 

## Document text

(a) Single-trip inside containers. Must be seamless, or with seams welded, soldered, brazed, double seamed, or swedged.

(b) The maximum capacity of containers in this class shall not exceed 1 L (61.0 cubic inches). The maximum inside diameter shall not exceed 3 inches.

[Order 71, 31 FR 9074, July 1, 1966. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178-43, 42 FR 42208, Aug. 22, 1977; Amdt. 178-101, 58 FR 50237, Sept. 24, 1993; 66 FR 45387, Aug. 28, 2001]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-178.33a-2>
- Source ID: `ecfr`
- SHA-256: `fb90c5b6466999a54bd001100c459051c650e174af15d07973bbe3b27e58d6c2`
- Retrieved: 2026-08-20T05:46:20.151Z
- Exported: 2026-08-23T18:40:49.001Z
- Document slug: `49-cfr-178-33a-2`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "178",
  "section": "178.33a-2",
  "subpart": "Subpart B—Specifications for Inside Containers, and Linings",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```