# -6 Bursting and buckling pressure.

- **operation:** document
- **citation:** 49 CFR 179.400-6
- **title:** -6 Bursting and buckling pressure.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** (a) [Reserved]

(b) The outer jacket of the required evacuated insulation system must be designed in accordance with § 179.400-8(d) and in addition must comply with the design loads specified in Section 6.2 of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter). The designs an
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-179-400-6.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-400-6
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.400-6
**body:**

(a) [Reserved]

(b) The outer jacket of the required evacuated insulation system must be designed in accordance with § 179.400-8(d) and in addition must comply with the design loads specified in Section 6.2 of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter). The designs and calculations must provide for the loadings transferred to the outer jacket through the support system.

[Amdt. 179-32, 48 FR 27708, June 16, 1983, as amended by Amdt. 179-51, 61 FR 18934, Apr. 29, 1996; 65 FR 58632, Sept. 29, 2000; 68 FR 75763, Dec. 31, 2003]
- **truncated:** false
- **body characters:** 561