# Individual specification requirements for multi-unit tank car tanks.

- **operation:** document
- **citation:** 49 CFR 179.301
- **title:** Individual specification requirements for multi-unit tank car tanks.
- **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) In addition to § 179.300 the individual specification requirements are as follows:

DOT specification 106A500-X 106A800-X 110A500-W 110A600-W 110A800-W 110A1000-W Minimum required bursting pressure, psig (1) (1) 1250 1500 2000 2500 Minimum thickness shell, inches 13⁄32 11⁄16 11⁄32 3⁄8 15⁄32 19⁄3
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-179-301.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-179-301.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-301
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.301
**body:**

(a) In addition to § 179.300 the individual specification requirements are as follows:

DOT specification 106A500-X 106A800-X 110A500-W 110A600-W 110A800-W 110A1000-W Minimum required bursting pressure, psig (1) (1) 1250 1500 2000 2500 Minimum thickness shell, inches 13⁄32 11⁄16 11⁄32 3⁄8 15⁄32 19⁄32 Test pressure, psig (see § 179.300-16) 500 800 500 600 800 1000 Safety relief devices, psig (see § 179.300-15) Start-to-discharge, or burst maximum, p.s.i. 375 600 375 450 600 700 Vapor-tight, minimum psig 300 480 300 360 480 650 1 None specified.

(b) [Reserved]

[29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21355, Nov. 6, 1971; Amdt. 179-40, 52 FR 13049, Apr. 20, 1987; 65 FR 58632, Sept. 29, 2000; 66 FR 45390, Aug. 28, 2001]
- **truncated:** false
- **body characters:** 792