# -11 Postweld heat treatment.

**Citation:** 49 CFR 179.200-11  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

When specified in § 179.201-1, after welding is complete, postweld heat treatment must be in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).

[68 FR 75761, Dec. 31, 2003]

## Document text

When specified in § 179.201-1, after welding is complete, postweld heat treatment must be in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).

[68 FR 75761, Dec. 31, 2003]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.200-11>
- Source ID: `ecfr`
- SHA-256: `74f83af95f74141adaaefd71212feadbbc6fb1de3d7f3b5e21685a507e5dcb4c`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-22T04:31:11.329Z
- Document slug: `49-cfr-179-200-11`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.200-11",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```