In addition to §179.100, the individual specification requirements are as follows:
| DOT specification | Insulation | Bursting pressure (psig) | Minimum plate thickness (inches) | Test pressure (psig) | Manway cover thickness | Bottom outlet | Bottom washout | Reference (179.***) |
|---|---|---|---|---|---|---|---|---|
| 105A100ALW | Yes | 500 | 5/8 | 100 | 22 1/2 | No | No | |
| 105A200ALW | Yes | 500 | 5/8 | 200 | 22 1/2 | No | No | |
| 105A300ALW | Yes | 750 | 5/8 | 300 | 22 5/8 | No | No | |
| 105A100W | Yes | 500 | 39/16 | 100 | 2 1/4 | No | No | |
| 105A200W | Yes | 500 | 39/16 | 200 | 2 1/4 | No | No | |
| 105A300W | Yes | 750 | 111/16 | 300 | 72 1/4 | No | No | |
| 105A400W | Yes | 1,000 | 111/16 | 400 | 72 1/4 | No | No | |
| 105A500W | Yes | 1,250 | 111/16 | 500 | 2 1/4 | No | No | 102-1, 102-2 |
| 105A600W | Yes | 1,500 | 111/16 | 600 | 2 1/4 | No | No | 102-4, 102-17 |
| 109A100ALW | Optional | 500 | 5/8 | 100 | 22 1/2 | No | Optional | |
| 109A200ALW | Optional | 500 | 5/8 | 200 | 22 1/2 | No | Optional | |
| 109A300ALW | Optional | 750 | 5/8 | 300 | 22 5/8 | No | Optional | |
| 109A300W | Optional | 500 | 111/16 | 300 | 2 1/4 | No | Optional | |
| 112A200W | Optional4 | 500 | 3 59/16 | 200 | 2 1/4 | No | No | |
| 112A340W | Optional4 | 850 | 111/16 | 340 | 2 1/4 | No | No | |
| 112A400W | Optional4 | 1,000 | 111/16 | 400 | 2 1/4 | No | No | |
| 112A500W | Optional4 | 1,250 | 111/16 | 500 | 2 1/4 | No | No | |
| 114A340W | Optional4 | 850 | 111/16 | 340 | 6 | Optional | Optional | 103 |
| 114A400W | Optional4 | 1,000 | 111/16 | 400 | 6 | Optional | Optional | 103 |
| 120A200ALW | Yes | 500 | 5/8 | 200 | 22 1/2 | Optional | Optional | 103 |
| 120A100W | Yes | 500 | 39/16 | 100 | 2 1/4 | Optional | Optional | 103 |
| 120A200W | Yes | 500 | 39/16 | 200 | 2 1/4 | Optional | Optional | 103 |
| 120A300W | Yes | 750 | 111/16 | 300 | 2 1/4 | Optional | Optional | 103 |
| 120A400W | Yes | 1,000 | 111/16 | 400 | 2 1/4 | Optional | Optional | 103 |
| 120A500W | Yes | 1,250 | 111/16 | 500 | 2 1/4 | Optional | Optional | 103 |
1When steel of 65,000 to 81,000 p.s.i. minimum tensile strength is used, the thickness of plates shall be not less than 5⁄8 inch, and when steel of 81,000 p.s.i. minimum tensile strength is used, the minimum thickness of plate shall be not less than 9⁄16 inch.
2When approved material other than aluminum alloys are used, the thickness shall be not less than 21⁄4 inches.
3When steel of 65,000 p.s.i. minimum tensile strength is used, minimum thickness of plates shall be not less than 1⁄2 inch.
4Tank cars not equipped with a thermal protection or an insulation system used for the transportation of a Class 2 (compressed gas) material must have at least the upper two-thirds of the exterior of the tank, including manway nozzle and all appurtenances in contact with this area, finished with a reflective coat of white paint.
5For inside diameter of 87 inches or less, the thickness of plates shall be not less than 1⁄2 inch.
6See AAR Specifications for Tank Cars, appendix E, E4.01 (IBR, see §171.7 of this subchapter), and §179.103-2.
7When the use of nickel is required by the lading, the thickness shall not be less than two inches.
[Amdt. 179-52, 61 FR 28679, June 5, 1996, as amended at 66 FR 45390, Aug. 28, 2001; 68 FR 75760, Dec. 31, 2003]
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