# -6 Thermal protection system.

- **operation:** document
- **citation:** 49 CFR 179.202-6
- **title:** -6 Thermal protection system.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** 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
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-179-202-6.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-179-202-6.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-202-6
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.202-6
**body:**

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]
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- **body characters:** 404