General Requirements

4.1 Application

The requirements set out in this standard apply to containers that are used or may be used in the handling, offering for transport, or transporting of dangerous goods by rail in Canada. The containers must conform to:

  1. the requirements of the TDG Act, the TDG Regulations, the requirements of this standard, and the requirements of the US DOT and the AAR that are specified in this standard, including manufacture, qualification, maintenance, and selection and use; and
  2. unless otherwise specified in this standard, the requirements for manufacture set out in the specifications of the containers that were in effect at the time of manufacture and the requirements for maintenance that were in effect during and after manufacture of the containers.

4.1.1 Shipments from the United States

Containers handled, offered for transport or transported from the United States to a place in Canada or through Canada to a destination in the United States may conform to the packaging and qualification requirements of Parts 172, 173, 179 and 180 of 49 CFR, except when subject to the terms of permits.

4.2 Continued Use

4.2.1 Qualification and maintenance of tank cars in Canadian service

Subject to clause 4.1, a tank car in Canadian service or ton container that is or may be used in the handling, offering for transport, or transporting of dangerous goods must conform to the requirements for qualification and maintenance set out in section 9 of this standard.

4.3 Equivalency

If the requirements for selection and use set out in this standard permit a tank car or ton container with a given class or specification to contain dangerous goods, a TC, a CTC, an ICC, or a DOT tank car or ton container equivalent to the given class or specification may be used.

4.4 Other Containers

Unless otherwise specified in this standard, a standardized means of containment, other than a Highway Tank, that conforms to the requirements of CSA B621 or CSA B622 may be used in the handling, offering for transport, or transporting of dangerous goods.

4.5 Classification

Dangerous goods must be classified in accordance with Part 2 of the TDG Regulations and the appropriate shipping name, UN number, classification, division, and packing group, as applicable, must be assigned.

4.6 Schedule 1 and Special Provisions

In addition to other the requirements of this standard, when there is a special provision of Schedule 1 in Appendix E for dangerous goods, that special provision applies to the container and the handling, offering for transport, and transporting of the dangerous goods.

4.7 Schedule 2 and List of Dangerous Goods

In addition to the other requirements of this standard, Schedule 2 in Appendix E must be used when determining the authorized containers and specific conditions applicable to the handling, offering for transport, or transporting of dangerous goods.

4.8 Conflict

If there is a conflict between a special provision of Schedule 1 in Appendix E and other provisions of this standard, the special provision applies. If there is a conflict between any requirement of this standard and a requirement in any of the referenced publications listed in section 2, the requirement of this standard applies.

4.9 Danger to Public Safety

4.9.1 Condition or Release from a Container that Could Endanger Public Safety

Subject to clause 10.5.5, a container must be designed, manufactured, qualified, loaded, unloaded, filled, secured, closed, and maintained so that, under normal conditions of transport, including handling, and under all conditions of temperature, pressure and vibration that may be expected to occur, no condition or release of dangerous goods that could endanger public safety occurs or may reasonably be expected to occur.

4.9.2 Venting of Containers

Subject to clause 4.9.1, venting of a container, in order to reduce internal pressure that may develop by the evolution of gas or vapour from the dangerous goods contained within the container, is permitted only when permitted for the specific dangerous goods by a special provision in Appendix E or when permitted pressure-relief or pressure-regulating devices are operating as intended.

4.10 Closures

4.10.1 Compliance with Specification

Unless otherwise specified in this standard, a closure on a container must be designed, manufactured, qualified, maintained, secured, and closed so that the closure conforms to the requirements of the specification for the container.

4.10.2 Securing of Closure

Subject to clause 4.9.2, a closure on a container must be designed, manufactured, qualified, maintained, secured, and closed so that, under normal conditions of transport, including handling and all conditions of temperature, pressure and vibration that may be expected to occur, the closure remains secured and closed, and does not leak.

4.10.3 Closures for Manways

4.10.3.1 Automatic Pressure Release

A hinged and bolted manway cover on a tank car must be designed, manufactured, qualified, and maintained in a way that, in the process of opening the manway cover, pressure will be released automatically and no condition or release of dangerous goods that could endanger public safety occurs or may reasonably be expected to occur.

4.10.3.2 Manway Below Liquid Level

A tank car used in the handling, offering for transport, or transporting of dangerous goods must not be equipped with a manway located below the liquid level.

4.10.4 Gaskets

Sealants must not be used in the application of gaskets.

4.11 Tank Car Integrity and Continued Use

4.11.1 Tank Car

Subject to clause 4.11.2, a tank car must conform to its original Certificate of Construction or subsequent approvals of any modification by the committee. A tank car is not in conformance if it has defects such as cracks or fractures in the tank car tank, external shell, continuous center sill or draft sill such that the tank car is no longer capable of withstanding the minimum loads, stresses and fatigue requirements specified by the AAR Specifications for Tank Cars and Design, Fabrication, and Construction of Freight Cars publications.

4.11.2 Excepted Insulation

A tank car that has deteriorated insulation or jackets is not considered in non-conformance when an insulation system is not mandatory by the tank car specification and safety relief devices are those required for non-insulated tank cars.

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