# -4 Joints.

- **operation:** document
- **citation:** 49 CFR 178.345-4
- **title:** -4 Joints.
- **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) All joints between the cargo tank shell, heads, baffles, baffle attaching rings, and bulkheads must be welded in conformance with Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).

(b) Where practical all welds must be easily accessible for inspection.

[Amdt. 178-89, 54 FR 25
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-178-345-4.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-178-345-4
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-178.345-4
**body:**

(a) All joints between the cargo tank shell, heads, baffles, baffle attaching rings, and bulkheads must be welded in conformance with Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).

(b) Where practical all welds must be easily accessible for inspection.

[Amdt. 178-89, 54 FR 25022, June 12, 1989, as amended by Amdt. 178-118, 61 FR 51341, Oct. 1, 1996; 68 FR 75756, Dec. 31, 2003]
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- **body characters:** 403