# -15 Radioscopy.

**Citation:** 49 CFR 179.400-15  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

Each longitudinal and circumferential joint of the inner tank, and each longitudinal and circumferential double welded butt joint of the outer jacket, must be examined along its entire length in accordance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of thi

## Document text

Each longitudinal and circumferential joint of the inner tank, and each longitudinal and circumferential double welded butt joint of the outer jacket, must be examined along its entire length in accordance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).

[68 FR 75763, Dec. 31, 2003]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.400-15>
- Source ID: `ecfr`
- SHA-256: `3e319918ec222fc815a45e01ac4eb14f272b14b86d912ba42af08ab341ea1e60`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-24T16:01:43.289Z
- Document slug: `49-cfr-179-400-15`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.400-15",
  "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"
}
```