Officials and employees of enterprises involved in one way or another with the transportation of solid carbon dioxide know how thoroughly and meticulously the traffic police inspects the drivers and drivers of specialized vehicles for travel documents and permits. Meanwhile, the requirement of inspectors to present a special permit for the transport of dangerous goods is unreasonable. In accordance with the international agreement of ADR and the decisions of the Economic Commission for Europe at the UN, dry ice transportation should be carried out in compliance with the necessary safety and protection measures for personnel. But in itself, solid carbon dioxide does not apply to dangerous goods.
Precautions for the safe transport of dry ice
Given that specialized isothermal containers are used for transporting solid carbon dioxide, freeze-drying of dry ice is significantly slowed down. But even with a slight emission of carbon dioxide from each container in the general cargo compartment of the car, the CO2 concentration can exceed the permissible norm of 0.5%, and also reduce the oxygen content in the air to a dangerous value of 19.5%. In this regard, the transport of dry ice by road should be subject to the following rules:
1. As containers, isothermal containers should be used, capable of venting the excess pressure of the resulting carbon dioxide. Transportation of dry ice in hermetically sealed metal containers is prohibited, as it can lead to an explosion.
2. The driver’s cab must be separated from the cargo compartment, in which dry ice is transported. If this requirement cannot be fulfilled, effective ventilation should be provided and warning signs of the established pattern should be placed at each entry point into the cab or the passenger compartment of the vehicle.
3. In order to protect against possible choking of personnel who will unload containers with dry ice, the cargo compartment of the vehicle should be thoroughly ventilated before starting this work. Personnel must be warned of danger with special signs.
4.To guarantee absolute safety, it is recommended to use CO2 excess detectors in the cab and cargo compartment of the vehicle, although this norm is not mandatory.
Use of dry ice as a refrigerant
The specified dry ice transportation standards and safety measures should be fully implemented if solid carbon dioxide is used in cargo cooling and air conditioning systems. Insulated or poorly ventilated containers, cars or railway wagons must be ventilated before unloading, and personnel will be instructed about the possible dangers of suffocation and how to work safely.
- December 2017 (1)
- July 2017 (1)
- October 2016 (1)
- September 2016 (6)
In the event that it is necessary to transport products, but it is impossible to use electrical appliances (for example, in a train or a regular non-equipped car), the only way out is dry ice.
Here's what you need to do to ensure that the products do not deteriorate for a long time. Pour granules of dry ice into a double-walled container (preferably isothermal), pour ordinary ice on top, lay polyethylene or rag, then put food or drinks.
It is important to prevent direct contact of dry ice with food, as the temperature of dry ice is -78.33 ° C and they simply freeze. Dry ice will create the necessary low temperature in the container and will not allow ordinary ice to melt. Products can be stored this way for 5 to 7 days.
A table of approximate storage times for products in a standard thermally insulated container using dry ice.