49 CFR 179.101-1: -1 Individual specification requirements.

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 2 2 1/2 No No

105A200ALW Yes 500 5/8 200 2 2 1/2 No No

105A300ALW Yes 750 5/8 300 2 2 5/8 No No

105A100W Yes 500 3 9/16 100 2 1/4 No No

105A200W Yes 500 3 9/16 200 2 1/4 No No

105A300W Yes 750 1 11/16 300 7 2 1/4 No No

105A400W Yes 1,000 1 11/16 400 7 2 1/4 No No

105A500W Yes 1,250 1 11/16 500 2 1/4 No No 102-1, 102-2

105A600W Yes 1,500 1 11/16 600 2 1/4 No No 102-4, 102-17

109A100ALW Optional 500 5/8 100 2 2 1/2 No Optional

109A200ALW Optional 500 5/8 200 2 2 1/2 No Optional

109A300ALW Optional 750 5/8 300 2 2 5/8 No Optional

109A300W Optional 500 1 11/16 300 2 1/4 No Optional

112A200W Optional 4 500 3 5 9/16 200 2 1/4 No No

112A340W Optional 4 850 1 11/16 340 2 1/4 No No

112A400W Optional 4 1,000 1 11/16 400 2 1/4 No No

112A500W Optional 4 1,250 1 11/16 500 2 1/4 No No

114A340W Optional 4 850 1 11/16 340 6 Optional Optional 103

114A400W Optional 4 1,000 1 11/16 400 6 Optional Optional 103

120A200ALW Yes 500 5/8 200 2 2 1/2 Optional Optional 103

120A100W Yes 500 3 9/16 100 2 1/4 Optional Optional 103

120A200W Yes 500 3 9/16 200 2 1/4 Optional Optional 103

120A300W Yes 750 1 11/16 300 2 1/4 Optional Optional 103

120A400W Yes 1,000 1 11/16 400 2 1/4 Optional Optional 103

120A500W Yes 1,250 1 11/16 500 2 1/4 Optional Optional 103

1 When 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.

2 When approved material other than aluminum alloys are used, the thickness shall be not less than 21⁄4 inches.

3 When steel of 65,000 p.s.i. minimum tensile strength is used, minimum thickness of plates shall be not less than 1⁄2 inch.

4 Tank 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.

5 For inside diameter of 87 inches or less, the thickness of plates shall be not less than 1⁄2 inch.

6 See AAR Specifications for Tank Cars, appendix E, E4.01 (IBR, see § 171.7 of this subchapter), and § 179.103-2.

7 When the use of nickel is required by the lading, the thickness shall not be less than two inches.