U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 27, 2020

§ 179.101-1 - 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.***)
105A100ALWYes5005/8100 2 2 1/2NoNo
105A200ALWYes5005/8200 2 2 1/2NoNo
105A300ALWYes7505/8300 2 2 5/8NoNo
105A100WYes500 3 9/161002 1/4NoNo
105A200WYes500 3 9/162002 1/4NoNo
105A300WYes750 1 11/16300 7 2 1/4NoNo
105A400WYes1,000 1 11/16400 7 2 1/4NoNo
105A500WYes1,250 1 11/165002 1/4NoNo102-1, 102-2
105A600WYes1,500 1 11/166002 1/4NoNo102-4, 102-17
109A100ALWOptional5005/8100 2 2 1/2NoOptional
109A200ALWOptional5005/8200 2 2 1/2NoOptional
109A300ALWOptional7505/8300 2 2 5/8NoOptional
109A300WOptional500 1 11/163002 1/4NoOptional
112A200WOptional 4500 3 5 9/162002 1/4NoNo
112A340WOptional 4850 1 11/163402 1/4NoNo
112A400WOptional 41,000 1 11/164002 1/4NoNo
112A500WOptional 41,250 1 11/165002 1/4NoNo
114A340WOptional 4850 1 11/16340 6OptionalOptional103
114A400WOptional 41,000 1 11/16400 6OptionalOptional103
120A200ALWYes5005/8200 2 2 1/2OptionalOptional103
120A100WYes500 3 9/161002 1/4OptionalOptional103
120A200WYes500 3 9/162002 1/4OptionalOptional103
120A300WYes750 1 11/163002 1/4OptionalOptional103
120A400WYes1,000 1 11/164002 1/4OptionalOptional103
120A500WYes1,250 1 11/165002 1/4OptionalOptional103

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 2 1/4 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.

[Amdt. 179-52, 61 FR 28679, June 5, 1996, as amended at 66 FR 45390, Aug. 28, 2001; 68 FR 75760, Dec. 31, 2003]