[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR179.101-1] [Page 1012-1013] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS 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: -------------------------------------------------------------------------------------------------------------------------------------------------------- Minimum Bursting plate Test Manway Reference DOT specification Insulation pressure thickness pressure cover Bottom outlet Bottom washout (179.[ast][ast][ast]) (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. [[Page 1013]] \6\ See AAR specifications for tank cars, Appendix E, E4.01 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]