Railroad -
Class 2
Gases - Tank Delivery
§174.204 covers tank car delivery of gases, including cryogenic liquids.
A tank car containing Class 2 - Gases must not be unloaded unless it is consigned for delivery and unloaded on a private track. If a private track is not available, it may be delivered on carrier tracks under the following provisions:
- A tank car of DOT-106A or 110A type must not be delivered and the loaded unit tanks must not be removed from the car frame on carrier tracks. [See §174.204(1) for exceptions.]
- Certain tank cars must not be delivered and unloaded on carrier tracks unless the lading is piped directly from the car to permanent storage tanks of sufficient capacity to receive the entire contents of the car. These certain tank cars include the following:
- A tank car containing Division 2.1 flammable gas material that is a cryogenic liquid
- A tank car, except for a DOT-106A or 110A multi-unit tank car tank containing anhydrous ammonia; hydrogen chloride, refrigerated liquid; hydrocarbon gas, liquefied; or liquefied petroleum gas; and having interior pipes for liquid and gas discharge valves equipped with check valves
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