[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR179.101-1] [Page 1071-1072] TITLE 49--TRANSPORTATION CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 179_SPECIFICATIONS FOR TANK CARS--Table of Contents Subpart C_Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120) Sec. 179.101-1 Individual specification requirements. In addition to Sec. 179.100, the individual specification requirements are as follows: [[Page 1072]] -------------------------------------------------------------------------------------------------------------------------------------------------------- Minimum Bursting plate Test Manway DOT specification Insulation pressure thickness pressure cover Bottom outlet Bottom washout Reference (179.***) (psig) (inches) (psig) thickness -------------------------------------------------------------------------------------------------------------------------------------------------------- 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/ 200 2 1/4 No.............. No............. 16 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 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 Sec. 171.7 of this subchapter), and Sec. 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]