Appendix E: Schedule 1 - Special Provisions

This schedule lists the special provisions that apply to dangerous goods and that correspond to the number set out in column 5 of Schedule 2. For any given dangerous goods listed in Schedule 2 only the container types listed in the applicable special provision must be used. When more than one container type is authorized in one or more applicable special provision, the container selected must be listed in the applicable special provision and must conform to all other applicable requirements of this standard.

  1. The dangerous goods may be handled, offered for transport, or transported in a metal railway vehicle that is closed and sift-proof.
  2. The dangerous goods may be handled, offered for transport, or transported in a Class 103, 104, 105, 111, 112, 114, 115, 120, AAR 203W, AAR 206W, or AAR 211W tank car or a Class 106 or 110 ton container.
  3. The dangerous goods may be handled, offered for transport, or transported in a Class 103, 104, 105, 111, 112, 114, 115, 120, or AAR 206W tank car or a Class 106 or 110 ton container.
  4. The dangerous goods may be handled, offered for transport, or transported in a Class 105, 112, 114, or 120 fusion-welded tank car or a Class 106 or 110 ton container.
  5. The dangerous goods may be handled, offered for transport, or transported in a Class 105 tank car.
  6. The dangerous goods may be handled, offered for transport, or transported in a Class 106 ton container.
  7. The dangerous goods may be handled, offered for transport, or transported in a Class 106 or 110 ton container.
  8. The dangerous goods may be handled, offered for transport, or transported in a Class 112 tank car.
  9. The dangerous goods may be handled, offered for transport, or transported in a Class 114 or 120 tank car.
  10. The tank car must conform to the following requirements:
    1. The tank car must be a:
      1. Specification 105A300W tank car;
      2. Specification 105A500W tank car; or
      3. Specification 105A500W tank car equipped with the manway cover plates, pressure-relief devices, vent valves, and loading and unloading valves that are required on a Specification 105A300W tank car;
    2. The tank car must be manufactured from nickel-clad or lead-lined steel plate;
    3. The tank car must have nickel cladding or lead lining on the inside of the tank;
    4. At least 20% of the required minimum total thickness of the tank car tank must be nickel cladding;
    5. Nickel cladding must conform to ASTM B162;
    6. Lead lining must be equal to or greater than 4.8 mm (0.188 in.) in thickness;
    7. Service equipment in contact with the dangerous goods must be lined or manufactured from metal compatible with the dangerous goods;
    8. The maximum filling density must be 300% and the minimum filling density must be 287%;
    9. The maximum water capacity of the tank car must be:
      1. 9 253 kg (20 400 lb.) for a Specification 105A300W tank car; and
      2. 16 964 kg (37 400 lb.) for a Specification 105A500W tank car;
    10. The maximum quantity of dangerous goods in the tank car must be:
      1. 27 216 kg (60 000 lb.) in a Specification 105A300W tank car; and
      2. 49 895 kg (110 000 lb.) in a Specification 105A500W tank car;
    11. A tank car built after December 31, 1990 must be equipped with a tank-head puncture-resistance system that conforms to the requirements set out in clause 8.2.8 or to the corresponding requirements in effect at the time of installation;
    12. Except as provided in clause 10.5.1.2 c. a tank car manufactured after the coming into force of this standard and used in the handling, offering for transport or transporting of bromine or bromine solutions must conform to the applicable authorized tank car specification listed in the table in clause 10.5.1.2 b.
  11. The dangerous goods may be handled, offered for transport, or transported in a Class 105J tank car, which must conform to the following requirements:
    1. The tank car must have a tank test pressure equal to or greater than 20.7 bar (300 psi);
    2. In determining outage, the temperature of the dangerous goods, the solubility of inert gas padding in ethylene oxide, and the partial pressure exerted by the gas padding must be taken into account;
    3. The tank car must be:
      1. equipped with a reclosing pressure-relief device having a start-to-discharge pressure of 517 kPa (75 psi);
      2. padded with dry nitrogen or other suitable inert gas that is:
        1. of sufficient quantity to render the vapour space of the tank non-flammable up to 40.6°C (105°F); and
        2. free of impurities that may cause the ethylene oxide to polymerize, decompose, or undergo other violent chemical reactions;
      3. equipped with a thermometer well, if the tank car was manufactured after December 30, 1971; and
      4. equipped with packing and gaskets that are manufactured of materials that do not react with or do not lower the auto-ignition temperature of the dangerous goods.
    4. Neoprene, natural rubber, and asbestos gaskets are prohibited;
    5. No part of the tank car and its service equipment, normally in contact with the dangerous goods, shall be manufactured of copper, silver, mercury, magnesium, or any of their alloys.
  12. A flammable liquid that has a flash point equal to or greater than 37.8°C (100°F) and does not meet the definition of any other classes, except Class 9, may be handled, offered for transport, or transported in a tank car tank that conforms to Special Provision 2.
  13. If the dangerous goods are in dispersion in organic liquid, the organic liquid must have a flash point greater than 50.0°C (122°F).
  14. The container must be manufactured of steel.
  15. The ton container must not be equipped with pressure-relief devices, and the openings for pressure-relief devices must be plugged or blank flanged.
  16. The container must be manufactured of:
    1. nickel or stainless steel; or
    2. steel that is lined with nickel, stainless steel, lead, or other such corrosion-resistant metallic material.
  17. The tank must not be equipped with bottom outlets.
  18. The tank car tank must have a test pressure equal to or greater than 20.7 bar (300 psi).
  19. Each container except a tank car or a ton container must be insulated with an insulating material so that the overall thermal conductance at 15.6°C (60°F) is equal to or less than 1.53 kJ/h m2 °C (0.075 Btu/h ft.2 °F). Insulating materials must not promote corrosion of steel when wet.
  20. The container must be protected from corrosion:
    1. by lining or coating the container with a non-metallic lining or coating compatible with the dangerous goods; or
    2. by manufacturing the container to a thickness that provides an allowance for the corrosive effects of the dangerous goods such that no danger to public safety occurs or may reasonably be expected to occur.
  21. The dangerous goods in the container must be completely covered with nitrogen, inert gas, or other inert materials.
  22. The dangerous goods may be handled, offered for transport, or transported in an open steel container.
  23. The tank must be manufactured of steel and:
    1. lined or coated with a non-metallic lining or coating compatible with the dangerous goods; or
    2. if the tank is not so lined or coated, the dangerous goods in the tank must be inhibited so that the corrosive effect on the steel is not greater than that of hydrofluoric acid of 65% concentration and the tank must be passivated before being used in the handling, offering for transport, or transporting of dangerous goods, including being re-passivated if cleaned with water.
  24. The container must be manufactured of nickel or nickel-copper alloy or steel that is clad with nickel or nickel-copper alloy.
  25. The tank must:
    1. be insulated with a material of a thickness equal to or greater than 100 mm (3.9 in.) except that the thickness of the insulation may be reduced to 51 mm (2 in.) over exterior heater coils;
    2. not be equipped with interior heating coils; and
    3. after unloading, contain a padding of inert gas that covers the dangerous goods or be filled with water.
  26. The tank must:
    1. have a minimum tank test pressure of 13.8 bar (200 psi); and
    2. contain a padding of dry inert gas at a pressure equal to or less than 1 bar (15 psi).
  27. The container must be manufactured of stainless steel.
  28. Each tank car manufactured before the coming into force of this standard must be a Class 105J tank car that:
    1. has a tank test pressure equal to or greater than 34.5 bar (500 psi); and
    2. is equipped with a reclosing pressure-relief device with a start-to-discharge pressure of 10.3 bar (150 psi).
  29. Valves and pressure-relief devices that are in contact with the dangerous goods must be manufactured of materials that will not cause the formation of acetylides.
  30. Pressure-relief devices must be equipped with stainless steel or platinum rupture discs.
  31. The tank must not be equipped with interior heater coils, and a tank car must be equipped with a reclosing pressure-relief device with a start-to-discharge pressure equal to or less than 15.5 bar (225 psi).
  32. The tank must be manufactured of stainless steel or aluminum.
  33. The dangerous goods may be handled, offered for transport, or transported in an open-top, sift-proof railway vehicle.
  34. The dangerous goods may be handled, offered for transport, or transported in a water-tight, sift-proof, closed-top, metal-covered hopper car that is equipped with a venting arrangement, including flame arrestors.
  35. The dangerous goods may be handled, offered for transport, or transported in a water-tight, sift-proof, closed-top, metal-covered hopper car if the particle size of the dangerous goods is equal to or greater than 149 µm.
  36. The dangerous goods may be handled, offered for transport, or transported in a Class 115A tank car that is equipped with:
    1. a safety vent that has a diameter equal to or greater than 305 mm (12 in.); and
    2. a rupture disc that has a start-to-discharge pressure equal to or less than 3.1 bar (45 psi).
  37. The dangerous goods may be handled, offered for transport, or transported in a covered hopper car with nitrogen padding.
  38. The dangerous goods may be handled, offered for transport, or transported in a Specification 106A500X ton container that is not equipped with any type of pressure-relief device. The ton container must be filled to an outage capable of preventing the tank from becoming liquid full at 54.4°C (130°F).
  39. Each tank car manufactured before the coming into force of this standard must:
    1. be a Class 105A tank car;
    2. have a minimum tank test pressure of 34.5 bar (500 psi); and
    3. be equipped with a reclosing pressure-relief device that has a start-to-discharge pressure equal to 15.5 bar (225 psi).
  40. The tank must:
    1. be equipped with gas-tight valve protection caps;
    2. have a minimum tank test pressure of 34.5 bar (500 psi);
    3. be filled to an outage capable of preventing the tank from becoming liquid full at 54.4°C (130°F); and
    4. in the case of a Class 110A ton container, be manufactured of stainless steel.
  41. The tank car must be a Class 105 tank car that:
    1. is equipped with exterior heating coils that are fusion-welded to the tank shell and that have been post-weld heat treated;
    2. has a tank test pressure equal to or greater than 20.7 bar (300 psi);
    3. is filled such that the outage must be equal to or greater than 5% at a product temperature equal to 98°C (208°F); and
    4. is loaded when the dangerous goods are in liquid form and transported only after the dangerous goods are in solid form.
  42. The dangerous goods may be handled, offered for transport, or transported in a sift-proof, water-tight, metal-covered hopper car.
  43. Cast metal parts of a Specification 103ANW tank car that are in contact with the dangerous goods must be manufactured of material that has a nickel content equal to or greater than 96.7%, and the dangerous goods must be anhydrous and free from any impurities.
  44. The tank car must conform to the applicable requirements of clause 10.5.1.
  45. Each tank car manufactured before the coming into force of this standard must be a Class 105S, 112J, 114J, or 120S tank car that:
    1. has a tank test pressure equal to or greater than 20.7 bar (300 psi); and
    2. is equipped with a reclosing pressure-relief device with a start-to-discharge pressure equal to 10.3 bar (150 psi).
  46. The dangerous goods may be handled, offered for transport, or transported in a Class 103, 104, 105, 111, 112, 114, or 120 tank car that:
    1. has a tank test pressure equal to or greater than 4.1 bar (60 psi); and
    2. is equipped with welded heater pipes designed for a test pressure of 34.5 bar (500 psi).
  47. The tank must be equipped with venting devices, including filters, and the venting devices must be liquid-tight at pressures equal to or less than 138 kPa (20 psi).
  48. Containers other than tank cars and ton containers are prohibited.
  49. Bottom outlets are prohibited on a tank car that is or may be used in the handling, offering for transport, or transporting of sulphuric acid in concentrations greater than 65.25%, except a tank car with bottom outlets may be used for sulphuric acid in concentrations greater than 65.25% if the tank car conforms to the following conditions:
    1. The tank car conforms to a Specification 111A100W2 tank car and is equipped with a bottom outlet that conforms to the requirements set out in clause 8.3.10 and par. E10.0, of the AAR Specifications for Tank Cars publication;
    2. The tank car forms part of a train, commonly known as a "unit train," that:
      1. is comprised only of motive power units, tank cars, and possibly a caboose;
      2. is not switched during transport;
      3. travels from a single consignor to a single consignee; and
      4. is comprised of tank cars that contain only sulphuric acid in concentrations greater than 65.25%.
    3. If, during transport, one of the tank cars referred to in clause 49 a. requires repair or has been repaired, the tank car may be separated from the "unit train" and proceed to destination in a regular freight train;
    4. The bottom outlet cap must be secured;
    5. The bottom outlet cap must be locked in place with a retractable pin that engages the hammer lugs if the outlet cap is equipped with hammer lugs;
    6. The bottom outlet cap, when secured and locked, must provide a liquid-tight seal that is maintained, under normal conditions of transport, including handling, throughout the time that the dangerous goods are transported between consignor and consignee; and
    7. Before offering the dangerous goods for transport, the rupture discs must be removed and inspected on a representative sampling of the tank cars.
  50. The container must be protected from corrosion:
    1. by lining or coating the container with a non-metallic lining or coating compatible with the dangerous goods; or
    2. by manufacturing the container to a thickness that provides an allowance for the corrosive effects of sulphuric acid in concentrations up to 65.25% or spent sulphuric acid in concentrations up to 65.25%.
  51. The tank must be filled to a filling density less than or equal to 125%.
  52. The dangerous goods may be handled, offered for transport, or transported in a Class 105 tank car that is filled to a filling density less than or equal to 124%.
  53. The dangerous goods may be handled, offered for transport, or transported in a Class 106 ton container that is:
    1. filled to a filling density less than or equal to 110%;
    2. nickel clad; and
    3. equipped with pressure-relief devices incorporating a fusible plug with a yield temperature of 79.4°C (175°F).
  54. The tank must be filled to a filling density less than or equal to 120%.
  55. The minimum outage must be such that the liquefied portion of the gas does not completely fill the tank prior to reaching the greater of either the setting of the pressure-regulating valve with the lowest setting that is fitted on the tank car or 2415 kPa (350 psi).
  56. The tank car must conform to the following requirements:
    1. The tank plates, manway nozzles and, subject to clause 56 c., anchorages of the tank must be manufactured of carbon steel that conforms to:
      1. ASTM A516/A516M, Grade 55/380, 60/415, 65/450, or 70/485 steel that conforms to the Charpy V-notch impact test requirements of ASTM A20/A20M, in longitudinal direction of rolling; or
      2. AAR TC128, Grade B steel that conforms to the Charpy V-notch impact test requirement of ASTM A370. The test must be conducted at a temperature equal to or less than -46*C (-50*F) in the longitudinal direction of rolling. The minimum average energy absorption result for three test specimens must be 20 J (15 ft.-lb.) and the minimum energy absorption result for any individual test specimen must be 13.5 J (10 ft.-lb.);
    2. b. Production welded test plates must:
      1. be prepared in conformance with the requirements set out in par. W4.0, of the AAR Specifications for Tank Cars publication;
      2. include impact test specimens of the weld metal and of base metal from the heat-affected zone that are prepared and tested in conformance with the requirements set out in par. W9.0, of the AAR Specifications for Tank Cars publication; and
      3. conform to the same impact requirements as the plate material;
    3. Anchor legs may be manufactured of stainless steel, ASTM A240/A240M Type 304, 304L, 316, or 316L, in which case impact tests are not required;
    4. The tank car tank must be insulated such that the overall thermal conductance is equal to or less than 0.61 kJ/h m2 °C (0.03 Btu/h ft2 °F);
    5. The tank car must be equipped with:
      1. a reclosing pressure-relief device having a start-to-discharge pressure equal to or less than 75% of the tank test pressure;
      2. a rupture disc set to burst at a pressure less than the tank test pressure and more than the reclosing pressure relief device start-to-discharge pressure;
      3. pressure-relief devices that have a discharge capacity capable of preventing the pressure in the tank from exceeding 82.5% of the tank test pressure;
      4. two regulating valves having start-to-discharge pressures equal to or less than:
        1. A. 24.1 bar (350 psi) on a Specification 105A500W tank car; and
        2. B. 27.6 bar (400 psi) on a Specification 105A600W tank car; and
      5. regulating valves and pressure-relief devices that have their discharge directed outside the protective housing;
    6. The tank car must have a tank test pressure equal to or greater than 34.5 bar (500 psi).
  57. The tank must be filled to a filling density equal or greater than 80.1% and less than or equal to 89% at a maximum pressure of 6.2 bar (90 psi).
  58. The tank must be filled to a filling density equal to or greater than 53.6% and less than or equal to 59.6% at a maximum pressure of 7.2 bar (105 psi).
  59. The tank car must conform to the following requirements:
    1. The tank car must be a Specification 105J600W tank car;
    2. All plates for the tank car tank must be manufactured of steel listed in clause 59 b. ii. and service equipment must be manufactured of steel listed in clause 59 b. i. or ii.:
      1. Stainless steel that conforms to ASTM A240/A240M, Type 304, 304L, 316, or 316L, in which case impact tests are not required; or
      2. Steel that conforms to ASTM A516/A516M, Grade 70/485, ASTM A537/A537M, Class 1, or AAR TC128, Grade B, in which case impact tests must be performed as follows:
        1. ASTM A516/A516M, Grade 70/485 and ASTM A537/A537M, Class 1 steel must conform to the Charpy V notch impact test requirements of ASTM A20/A20M, in the longitudinal direction of rolling; and
        2. AAR TC128, Grade B steel must conform to the Charpy V notch impact test requirement of ASTM A370. The test must be conducted at a temperature equal to or less than 46°C (-50F) in the longitudinal direction of rolling. The minimum average energy absorption result for three test specimens must be 20 J (15 ft. lb.) and the minimum energy absorption result for any individual test specimen must be 13.5 J (10 ft.-lb.);
    3. Production welded test plates must:
      1. be prepared in conformance with the requirements set out in par. W4.0, of the AAR Specifications for Tank Cars publication;
      2. include impact test specimens of the weld metal and of base metal from the heat-affected zone that are prepared and tested in conformance with the requirements set out in par. W9.0, of the AAR Specifications for Tank Cars publication; and
      3. conform to the same impact requirements as the plate material;
    4. The tank car must be equipped with at least one reclosing pressure-relief device that conforms to the requirements set out in clause 8.2.6;
    5. The discharge from each pressure-relief device must be directed outside the protective housing;
    6. Excess-flow valves must be installed under all liquid and vapour valves;
    7. A thermometer well may be installed;
    8. A gauging device may be installed;
    9. A pressure gauge may be installed;
    10. Aluminum, copper, silver, zinc, or an alloy of any of these metals must not be used in the manufacture of the tank car tank or any part of the service equipment that is in contact with the dangerous goods;
    11. The jacket of the tank car must be stencilled adjacent to the stencil for water capacity, as follows:
    12. MINIMUM OPERATING TEMPERATURE — °F
    13. l. The tank car and insulation must be designed to prevent the vapour pressure of the dangerous goods from reaching the start-to-discharge pressure of the pressure-relief device on or before thirty days after loading the tank car. The conditions to be considered include an ambient temperature equal to 32.2°C (90°F) and the tank car filled to its maximum allowable filling density.
  60. The liquefied gas must be loaded so that the outage is equal to or greater than 2% of the total capacity of the tank at one of the following reference temperatures:
    1. 46.1°C (115°F) for a non-insulated tank;
    2. 43.3°C (110°F) for tanks having a thermal protection system incorporating a metal jacket that provides at 15.6°C (60°F) an overall thermal conductance less than or equal to 10.22 kJ/h m2 °C (0.5 Btu/h ft.2 °F); and
    3. 40.6°C (105°F) for an insulated tank when the overall thermal conductance is equal to or less than the minimum required of a Class 105 or 120.
  61. For liquefied petroleum gas and anhydrous ammonia loaded in tank cars, during the winter months of November through March, the following winter reference temperatures may be used if:
    1. the tank car is shipped directly to a consumer for unloading and not stored in transit;
    2. the offeror of the tank car informs each customer that winter reference temperatures were used at the time that the tank car was filled;
    3. the tank car is unloaded as soon as possible after the month of March in order to retain the specified outage and to prevent a release of dangerous goods which might occur due to the tank car becoming liquid full at higher temperatures; and
    4. the winter reference temperatures are:
      1. 38°C (100°F) for a non-insulated tank car;
      2. 32°C (90°F) for a tank car having a thermal protection system incorporating a metal jacket that provides at 15.6°C (60°F) an overall thermal conductance less than or equal to 10.2 kJ/h m2 °C (0.50 Btu/h ft.2 °F); or
      3. 29°C (85°F) for an insulated tank car when the overall thermal conductance is equal to or less than the minimum required of a Class 105 or 120.
  62. The tank car must conform to the following requirements:
    1. The tank car must be a Specification 105J600W tank car and be designed for loading at a temperature equal to or less than -45.6°C (-50°F);
    2. All plates for the tank car tank must be manufactured of steel listed in clause 62 b. ii., and service equipment must be manufactured of steel listed in clause 62 b. i. or b. ii.:
      1. Stainless steel that conforms to ASTM A240/A240M, Type 304, 304L, 316, or 316L, in which case impact tests are not required; or
      2. Steel that conforms to ASTM A516/A 516M, Grade 70/485, ASTM A537/A537M, Class 1, or AAR TC128, Grade B, in which case impact tests must be performed as follows:
        1. ASTM A516/A516M, Grade 70/485 and ASTM A537/A537M, Class 1 steel must conform to the Charpy V-notch impact test requirements of ASTM A20/A20M, in the longitudinal direction of rolling; and
        2. AAR TC128, Grade B steel must conform to the Charpy V-notch impact test requirement of ASTM A370. The test must be conducted at a temperature equal to or less than 46C ( 50F) in the longitudinal direction of rolling. The minimum average energy absorption result for three test specimens must be 20.3 J (15 ft.-lb.) and the minimum energy absorption result for any individual test specimen must be 13.5 J (10 ft.-lb.);
    3. Production welded test plates must:
      1. be prepared in conformance with the requirements set out in par. W4.0, of the AAR Specifications for Tank Cars publication;
      2. include impact test specimens of the weld metal and of base metal from the heat-affected zone that are prepared and tested in conformance with the requirements set out in par. W9.0, of the AAR Specifications for Tank Cars publication; and
      3. conform to the same impact requirements as the plate material;
    4. Reclosing pressure-relief devices must be trimmed with nickel-copper alloy or other material approved by the Committee and be equipped with a rupture disc of silver, polytetrafluoroethylene-coated nickel-copper alloy, or tantalum. Pressure-relief devices must be equipped with a suitable auxiliary valve for the purpose of venting the space between the rupture disc and the relief valve;
    5. The discharge from each pressure-relief device must be directed outside the protective housing;
    6. Loading and unloading valves must be:
      1. trimmed with nickel-molybdenum alloys UNS N10001 or N10002, nickel-copper, or other material approved by the Committee; and
      2. identified as "Vapours" or "Vapours/Vapeurs," "Liquid" or "Liquid/Liquide";
    7. Excess-flow valves or spring loaded check valves must be installed under all liquid and vapour valves, but an excess-flow valve must not be installed in conjunction with a pressure-relief device;
    8. A thermometer well may be installed;
    9. A gauging device may be installed;
    10. A sump must be installed in the bottom of the tank under the liquid pipes;
    11. All gaskets must be made of, or coated with, polytetrafluoroethylene or other materials approved by the Committee;
    12. The tank car may be equipped with exterior cooling coils on top of the shell;
    13. The jacket of the tank car must be stencilled adjacent to the stencil for water capacity, as follows:
    • MINIMUM OPERATING TEMPERATURE — °F
    • n. The tank car and insulation must be designed to prevent the vapour pressure of the dangerous goods from reaching the start-to-discharge pressure of the pressure-relief device on or before thirty days after loading the tank car. The conditions to be considered include an ambient temperature equal to 32.2°C (90°F) and the tank car filled to its maximum allowable filling density;
    • o. The tank car must be unloaded to such an extent that the vapour pressure of the dangerous goods remaining in the tank, at a reference temperature equal to 32.2°C (90°F), will not reach the start-to-discharge pressure of the pressure-relief device;
    • p. The auxiliary valve on the pressure-relief device must be closed during transport;
    • q. In addition to the above requirements and except as provided in special provision 83, a tank car manufactured after the coming into force of this standard and used in the handling, offering for transport or transporting of hydrogen chloride, refrigerated liquid must conform to specification 105J600I and must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  63. The tank car must conform to the following requirements:
    1. The interior pipes of the loading and unloading valves and sampling valves, as well as the gauging device if it provides a means for passage of the dangerous goods from the interior to the exterior of the tank must be equipped with excess-flow valves or spring loaded check valves. If the opening for passage of the dangerous goods through the gauging device is less than 1.52 mm (0.060 in.) in diameter, an excess-flow valve is not required.
    2. The cover of the protective housing must be provided with an opening that is located above each pressure-relief device. The opening must be provided with a weatherproof cover designed for vertical discharge. The opening with weatherproof cover must be concentric with the discharge of the pressure-relief device and must have an area equal to or greater than the valve outlet area.
  64. The tank car must be a Class 105 tank car that:
    1. is insulated with 5.08 cm (2 in.) glass fibre placed over 5.08 cm (2 in.) of ceramic fibre, if the tank car was manufactured after September 30, 1991;
    2. has a tank test pressure equal to or greater than 34.5 bar (500 psi);
    3. has excess-flow valves or spring loaded check valves on the interior pipes of liquid discharge valves; and
    4. in addition to the above requirements and except as provided in special provision 8, a tank car manufactured after the coming into force of this standard and used in the handling, offering for transport or transporting of chlorine must conform to specification 105J600I and must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  65. The tank car must be a Specification 105J600W tank car or a Class 106 or 110 ton container. In addition, the tank must conform to the following requirements:
    1. In the case of a Specification 105J600W tank car:
      1. the water content of the dangerous goods must be equal to or less than 0.10% by mass; and
      2. the outage must be equal to or greater than 1% of the total volumetric capacity of the tank at the reference temperature of 40.6°C (105°F);
    2. In the case of a Class 106 or 110 ton container:
      1. the ton container must be equipped with one or more pressure-relief devices of the fusible plug type having a yield temperature equal to or less than 76.7°C (170°F) and equal to or greater than 69.4°C (157°F). Each device must be resistant to extrusion of the fusible alloy and leak-tight at 54.4°C (130°F);
      2. the valve outlets must be sealed by a threaded solid plug; and
      3. all valves must be protected by a metal cover, and the maximum filling density is 68%.
    3. In addition to the above requirements and except as provided in special provision 83 a tank car manufactured after the coming into force of this standard and used in the handling, offering for transport or transporting of hydrogen sulphide must conform to specification 105J600I and must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  66. The tank car must conform to the following requirements:
    1. Subject to clause 66 b. the tank car must have a head puncture-resistance system, a metal jacket, and a tank test pressure equal to or greater than 13.8 bar (200 psi), except that:
      1. no metal jacket is required if:
        1. the tank test pressure is equal to or greater than 23.4 bar (340 psi); or
        2. the tank shell and head are manufactured from AAR TC128, Grade B steel, normalized.
      2. a higher tank test pressure is required if such higher tank test pressure is otherwise specified in this standard.
    2. When a reference to this special provision is made in column 5 of the table in Schedule 2 for generic shipping names, the requirements of clause 66 a. apply only to the following generic shipping names and descriptions of dangerous goods:
      1. Organochlorine pesticide, solid, toxic, or organochlorine pesticide, liquid, toxic, flammable, or organochlorine pesticide, liquid, toxic, if those pesticides include any one of the following chemicals or their solutions or mixtures: aldrin, chlordane, DDT, dieldrin, alpha-endosulfan, beta-endosulfan, endrin, heptachlor, isodrin, metoxychlor, pentachlorophenol, TDE, toxaphene, 2,4,5 trichlorophenol, or 2,4,6-trichlorophenol;
      2. Chloroanilines, solid containing p-chloroaniline;
      3. Chlorocresols, solid containing6 p-chloro-m-cresol;
      4. Flammable liquid, n.o.s. containing 2-chloroethyl vinyl ether or 1,2 dichloroethane or 1,2-dichloropropane or 1,3-dichloropropene or 1,2,4-trichlorobenzene or 1,1,2-trichloroethane;
      5. Chlorophenols, liquid containing o-chlorophenol;
      6. Toxic liquid, n.o.s. containing 3-chloropropionitrile or m dichlorobenzene or p-dichlorobenzene or hexachloropropene or tetrachloroethane;
      7. Dibromochloropropanes containing 1,2-dibromo-3-chloropropane;
      8. Toxic liquid, flammable, n.o.s. containing 1,4-dichloro-2-butene; and
      9. Toxic solid, n.o.s. containing 2,4-diclorophenol or kepone or 1,2,4,5-tetrachlorobenzene.
  67. The dangerous goods may be handled, offered for transport, or transported in a container that conforms to the following requirements:
    1. The container must be:
      1. a Class 103, 104, 105, 111, 112, 114, or 115 tank car or a Specification AAR203W, AAR206W, or AAR211W tank car; or
      2. a Class 106 or 110 ton container; or
    2. A non specification tank, other than a tank car equivalent in structural design and accident damage resistance to a specification container;
  68. Dangerous goods that meet the definition of solid elevated temperature dangerous goods are exempted from all requirements of this standard.
  69. The dangerous goods may be handled, offered for transport, or transported in a tank car that conforms to the following requirements:
    1. A tank car containing a flammable cryogenic liquid must not be shipped unless the tank car was loaded by, or with the consent of, the owner of the tank car;
    2. The amount of flammable cryogenic liquid loaded into a tank car must be determined either by direct measurement or by calculation based on mass to verify that the tank has not been filled to a level in excess of the limits specified in clause 66 f. The mass of any flammable cryogenic liquid loaded, except hydrogen, must be checked by the use of scales after disconnecting the loading line;
    3. A tank car must not be loaded with any flammable cryogenic liquid:
      1. if the tank car already contains dangerous goods or other substance that is not compatible with the dangerous goods to be loaded;
      2. that is colder than the design service temperature of the tank; or
      3. if the average daily pressure rise in the tank exceeded 0.21 bar (3 psi) during any prior shipment;
    4. When a tank car containing a flammable cryogenic liquid is offered for transport:
      1. outage must be equal to or greater than 0.5% and the liquid level must be below the inlet of the pressure-relief valve or pressure-control valve at the start-to-discharge pressure setting of the valve, with the tank car in a level attitude; and
      2. the absolute pressure in the annular space must be less than 10 Pa (75 µm of mercury);
    5. A flammable cryogenic liquid must be loaded into a tank car at such a temperature that the average daily pressure rise during transport will be equal to or less than 0.21 bar (3 psi);
    6. A Class 113 tank car is authorized for the shipment of ethylene, methane, natural gas or hydrogen (minimum 95% parahydrogen) in the state of cryogenic liquids. Such a tank car must be loaded and shipped in accordance with the applicable requirements set out in the following table:

Pressure-control Valve Setting or Relief-valve Setting

Relief-valve Setting 113D60W
113C60W
113C120W 113C120W 113C140W 113C140W 113D120W 113A175W
113A60W
Ethylene Ethylene Methane or Natural Gas Ethylene Methane or Natural Gas Ethylene Hydrogen
Maximum permitted filling density (% by mass) 52.8 (at 310 kPa [45 psi] maximum start-to-discharge) 51.1 (at 517 kPa [75 psi] maximum start-to-discharge) 38.1 (at 517 kPa [75 psi] maximum start-to-discharge) 50.1 (at 620 kPa [90 psi] maximum start-to-discharge) 36.8 (at 620 kPa [90 psi] maximum start-to-discharge) 51.1 (at 517 kPa [75 psi] maximum start-to-discharge) 6.60 (at 117 kPa [17 psi] maximum start-to discharge)
Maximum pressure when offered for transport, kPa (psi) 69 (10) 69 (10) 69 (10) 69 (10) 69 (10) 139 (20)
Design service temperature -162.2°C
( 260°F)
-162.2°C
( 260°F)
-162.2°C
( 260°F)
-162.2°C
( 260°F)
-162.2°C
( 260°F)
-103.9°C
( 155°F)
-252.8°C
( 423°F)
    1. g. Each shipment of Class 2.1 Dangerous Goods must be monitored to determine the average daily pressure rise in the tank car tank. If the average daily pressure rise during any shipment is greater than 0.20 bar (3 psi) per day, the tank car must be retested for thermal integrity before any subsequent shipment. Either of the following alternative thermal integrity retests may be used:
      1. Pressure Rise Retest — The pressure rise in the tank must not exceed 0.34 bar (5 psi) in 24 h. If the pressure rise retest is performed, the absolute pressure in the annular space of the loaded tank car must not exceed 10 Pa (75 µm of mercury) at the beginning of the retest and must not increase more than 3.33 Pa (25 µm of mercury) during the 24 h period; or
      2. Calculated Heat Transfer Rate Retest — The insulation system must be performance tested as specified in clause 8.6.3. If the calculated heat transfer rate retest is performed, the absolute pressure in the annular space of the loaded tank car must not exceed 10 Pa (75 µm of mercury) at the beginning of the retest and must not increase more than 3.33 Pa (25 µm of mercury) during the 24 h period. The calculated heat transfer rate in 24 h must not exceed:
        1. 120% of the appropriate standard heat transfer rate specified in clause 8.6.24.1, for a Specification 113A60W and Specification 113C120W tank car;
        2. 0.2707 kJ/kg/day (0.1164 Btu/day/lb.) of inner tank water capacity for a Specification 113A175W tank car;
        3. 0.7610 kJ/kg/day (0.3272 Btu/day/lb.) of inner tank water capacity for a Specification 113C60W and Specification 113D60W tank car; or
        4. 1.1025 kJ/kg/day (0.4740 Btu/day/lb.) of inner tank water capacity for a Specification 113D120W tank car;
    2. h. If a Class 113 tank car fails either of the retests specified in clause 82 g. i. or ii, the tank car must be removed from service and must not be placed back in service until one of the applicable retests in clause 82. g. i. or ii, is completed successfully;
    3. i. A rupture disc of a Class 113 tank car must be replaced every twelve months, and the replacement date stencilled on the car adjacent to marking for the pressure-relief device;
    4. j. If a Class 113 tank car is used in the handling, offering for transport, or transporting of a flammable cryogenic liquid, an alternate pressure-relief device must be retested at the same time interval specified for the required pressure-relief device. The start-to-discharge pressure and vapour-tight pressure requirements for the alternate pressure-relief device must be as specified in clause 8.6.24.1. The alternate pressure-relief device values specified in clause 8.6.24 for the Specification 113C120W tank car apply to the Specification 113D120W tank car; and
    5. k. A tank car transporting a flammable cryogenic liquid must not be:
      1. uncoupled while in motion;
      2. coupled into with more force than is necessary to complete the coupling; or
      3. struck by any railway vehicle moving under its own momentum.
  1. Atmospheric gases, helium, and mixtures thereof, or cryogenic liquids may be handled, offered for transport, or transported in a tank car provided the tank car conforms to the following requirements, as applicable:
    1. If the internal pressure is to be maintained at values equal to or less than 174 kPa (25.3 psi) during transport, the tank car must be a Class 113 tank car or a Specification AAR 204W tank car when authorized for such service by the Committee and the filling level of the dangerous goods is equal to or less than 95% of the volumetric capacity of the tank;
    2. The conditions specified by the AAR for such tank cars;
    3. The pressure setting for a pressure-control valve, if used, must be equal to or greater than 103 kPa (15 psi);
    4. The absolute pressure in the annular space is less than 26.7 Pa (200 µm of mercury);
    5. The internal tank pressure in a Specification AAR 204W at the time of offering for transport is equal to or less than 70 kPa (10 psi);
    6. If the internal pressure is to be maintained at values greater than 174 kPa (25.3 psi) during transport, the tank car must be a Class 113 tank car loaded and shipped in accordance with the applicable requirements set out in the following table:

Pressure-control Valve Setting or Relief-valve Setting

Relief-valve Setting 113A90W 113A90W 113A90W
Nitrogen Oxygen Argon
Maximum permitted filling density (% by mass) 72.0 (at 414 kPa 60psi] maximum start-to-discharge) 104.0 (at 414 kPa [60 psi] maximum start-to-discharge) 126.0 (at 414 kPa [60 psi] maximum start-to discharge)
Maximum pressure when offered for transport, kPa (psi) NA NA NA
Design service temperature -195.5°C
( 320°F)
-195.5°C
( 320°F)
-195.5°C
( 320°F)
    1. g. A tank car transporting cryogenic liquid must not be:
      1. uncoupled while in motion;
      2. coupled into with more force than is necessary to complete the coupling; or
      3. struck by any railway vehicle moving under its own motion.
  1. 71. The container for asbestos must conform to the general requirements of Section 4 of this standard. The asbestos must be handled, offered for transport, or transported in a rigid, watertight, and sift-proof container such as a portable tank or a hopper-type railway vehicle. Asbestos that is immersed or fixed in a natural or artificial binder material, such as cement, plastic, asphalt, resins, or mineral ore, and manufactured products containing asbestos are not subject to the requirements of this standard.
  2. 72. This dangerous goods is toxic by inhalation in Hazard Zone A.
  3. 73. This dangerous goods is toxic by inhalation in Hazard Zone B.
  4. 74. This dangerous goods is toxic by inhalation in Hazard Zone C.
  5. 75. This dangerous goods is toxic by inhalation in Hazard Zone D.
  6. 76. This dangerous goods is toxic by inhalation.
  7. 77. Liquefied petroleum gas must be odorized to allow detection of the liquefied petroleum gas in the atmosphere at any concentration above one-fifth of its lower explosive limit in air unless the addition of any odorant would be harmful to further use or processing of the liquefied petroleum gas.
  8. 78. The dangerous goods may be handled, offered for transport, or transported in a railway vehicle or a non-specification container. The container must be water-tight, sift-proof, and provided with a venting arrangement that is capable of preventing any accumulation of gaseous emissions that could endanger public safety. Before and during loading, the dangerous goods must be dry, must not come in contact with water, and must not be offered for transport if the temperature of the dangerous goods exceeds 40°C (104°F).
  9. 79. The pressure-relief devices on tank cars must have been qualified within the last five years. The pressure-relief devices on tank cars must be equipped with a stainless steel spring or a spring coated to protect against ammonia stress corrosion cracking.
  10. 80. Except as provided in special provision 83, for dangerous goods toxic by inhalation, tank cars manufactured after the coming into force of this standard must conform to specification 105J500I. When special provision 81 is also set out in schedule 2 for the specific dangerous goods a 112J500I is also authorized. Tank cars must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  11. 81. Except as provided in special provision 83, for dangerous goods toxic by inhalation, tank cars manufactured after the coming into force of this standard must conform to specification 112J500I. When special provision 80 is also set out in schedule 2 for the specific dangerous goods a 105J500I is also authorized. Tank cars must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  12. 82. Except as provided in special provision 83, for dangerous goods toxic by inhalation, tank cars manufactured after the coming into force of this standard must conform to specification 105J600I and must be equipped with a tank-head puncture-resistance system that conforms to clause 8.2.8. Clause 8.2.8.3 does not apply.
  13. 83. As an alternative to the tank car specifications authorized in special provisions 62, 64, 65, 80, 81, or 82 a tank car of the same authorized specification but of the next lower test pressure, as prescribed in column 3 of the table in clause 8.3.22 may be used provided that both of the following conditions are met:
    1. The difference between the alternative and the required minimum plate thicknesses, based on the calculation using the formula in clause 8.3.6.1, must be added to the alternative tank car jacket and head shield. When the jacket and head shield are made from steel with a minimum tensile strength from 70 000 psi to 81 000 psi, but the required minimum plate thickness calculation is based on steel with a minimum tensile strength of 81,000 psi, the thickness to be added to the jacket and head shield must be increased by a factor of 1.157. Forming allowances for heads are not required to be considered when calculating thickness differences; and
    2. The tank car jacket and head shields are manufactured from carbon steel plates as prescribed in clause 8.3.5. The steel must meet the Charpy requirements of par. 2.2.1.2 of the AAR Specifications for Tank Cars publication and head shields must be normalized after forming.
  14. 84. The tank must be filled to a filling density less than or equal to 104%.

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