# -11 Postweld heat treatment.

- **operation:** document
- **citation:** 49 CFR 179.200-11
- **title:** -11 Postweld heat treatment.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** 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]
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-179-200-11.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-179-200-11.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-200-11
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.200-11
**body:**

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]
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- **body characters:** 242