# -6 Thermal protection system.

**Citation:** 49 CFR 179.202-6  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

The DOT Specification 117 tank car must have a thermal protection system. The thermal protection system must:

(a) Conform to § 179.18 of this part;

(b) Be equipped with a thermal protection blanket with at least 1/2-inch-thick material that meets § 179.18(c) of this part; and

(c) Include a reclos

## Document text

The DOT Specification 117 tank car must have a thermal protection system. The thermal protection system must:

(a) Conform to § 179.18 of this part;

(b) Be equipped with a thermal protection blanket with at least 1/2-inch-thick material that meets § 179.18(c) of this part; and

(c) Include a reclosing pressure relief device in accordance with § 173.31 of this subchapter.

[81 FR 53957, Aug. 15, 2016]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.202-6>
- Source ID: `ecfr`
- SHA-256: `596bb6b5c059e68545e04c9a5c9f73b2a06725f502a56f8b436f20c6b98fd481`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-23T21:49:52.919Z
- Document slug: `49-cfr-179-202-6`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.202-6",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```