# -1 Individual specification requirements.

**Citation:** 49 CFR 179.401-1  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

In addition to § 179.400, the individual specification requirements for the inner tank and its appurtenances are as follows:

DOT specification 113A60W 113C120W Design service temperature, °F −423 −260. Material § 179.400-5 § 179.400-5. Impact test (weld and plate material) § 179.400-5(c) § 179.400-

## Document text

In addition to § 179.400, the individual specification requirements for the inner tank and its appurtenances are as follows:

DOT specification 113A60W 113C120W Design service temperature, °F −423 −260. Material § 179.400-5 § 179.400-5. Impact test (weld and plate material) § 179.400-5(c) § 179.400-5(c). Impact test values § 179.400-5(d) § 179.400-5(d). Standard heat transfer rate. (Btu per day per lb. of water capacity, max.) (see § 179.400-4) 0.097 0.4121. Bursting pressure, min. psig 240 300. Minimum plate thickness shell, inches (see § 179.400-7(a)) 3⁄16 3⁄16. Minimum head thickness, inches (see § 179.400-8 (a), (b), and (c)) 3⁄16 3⁄16. Test pressure, psig (see § 179.400-16) 60 120. Safety vent bursting pressure, max. psig 60 120. Pressure relief valve start-to-discharge pressure, psig (±3 psi) 30 75. Pressure relief valve vapor tight pressure, min. psig 24 60. Pressure relief valve flow rating pressure, max. psig 40 85. Alternate pressure relief valve start to-discharge pressure, psig (±3 psi) 90. Alternate pressure relief valve vapor tight pressure, min. psig 72. Alternate pressure relief valve flow rating pressure, max. psig 100. Pressure control valve Start-to-vent, max. psig (see § 179.400-20(c)(4)) 17 Not required. Relief device discharge restrictions § 179.400-20 179.400-20. Transfer line insulation § 179.400-17 Not required.

[Amdt. 179-32, 48 FR 27708, June 16, 1983, as amended at 49 FR 24318, June 12, 1984; 65 FR 58632, Sept. 29, 2000; 66 FR 45390, Aug. 28, 2001]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.401-1>
- Source ID: `ecfr`
- SHA-256: `437bdbab38d7f1cd13b181df95c6b7c657a971f6c4b2a13b896735c37a68b578`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-22T22:50:14.001Z
- Document slug: `49-cfr-179-401-1`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.401-1",
  "subpart": "Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```