# -1 Individual specification requirements.

**Citation:** 49 CFR 179.201-1  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

In addition to § 179.200, the individual specification requirements are as follows:

DOT Specification 1 Insulation Bursting pressure (psig) Minimum platethickness (inches) Testpressure (psig) Bottomoutlet Bottomwashout References (179.201 - ***) 111A60ALW1 Optional 240 1⁄2 60 Optional Optional 6(a)

## Document text

In addition to § 179.200, the individual specification requirements are as follows:

DOT Specification 1 Insulation Bursting pressure (psig) Minimum platethickness (inches) Testpressure (psig) Bottomoutlet Bottomwashout References (179.201 - ***) 111A60ALW1 Optional 240 1⁄2 60 Optional Optional 6(a). 111A60ALW2 Optional 240 1⁄2 60 No Optional. 111A60W1 Optional 240 7⁄16 60 Optional Optional 6(a). 111A60W2 Optional 240 7⁄16 60 No Optional. 111A60W5 Optional 240 7⁄16 60 No No 3, 6(b). 111A60W6 Optional 240 7⁄16 60 Optional Optional 4, 5, 6(a), 6(c). 111A60W7 Optional 240 7⁄16 60 No No 4, 5, 6(a). 111A100ALW1 Optional 500 5⁄8 100 Optional Optional 6(a). 111A100ALW2 Optional 500 5⁄8 100 No Optional. 111A100W1 Optional 500 7⁄16 100 Optional Optional 6(a). 111A100W2 Optional 500 7⁄16 100 No Optional. 111A100W3 Yes 500 7⁄16 100 Optional Optional 6(a). 111A100W4 Yes (see 179.201-11) 500 7⁄16 100 No No 6(a), 8, 10. 111A100W5 Optional 500 7⁄16 100 No No 3. 111A100W6 Optional 500 7⁄16 100 Optional Optional 4, 5, 6(a) and 6(c). 111A100W7 Optional 500 7⁄16 100 No No 4, 5, 6(c). 1 Tanks marked “ALW” are constructed from aluminum alloy plate; “AN” nickel plate; “CW,” “DW,” “EW,” “W6,” and “W7” high alloy steel or manganese-molybdenum steel plate; and those marked “BW” or “W5” must have an interior lining that conforms to § 179.201-3.

[Amdt. 179-52, 61 FR 28680, June 5, 1996, as amended by 66 FR 45390, Aug. 28, 2001; 68 FR 48571, Aug. 14, 2003]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.201-1>
- Source ID: `ecfr`
- SHA-256: `6b91308a04c0b46746f4ce6464b1153de4f8cf7ab7a459ca87a1e65fbf4026ad`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-25T00:20:24.240Z
- Document slug: `49-cfr-179-201-1`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.201-1",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```