Description
Tank containers must be at least 80% full, to prevent dangerous surging of the liquids in transit. On the other hand, they must not as a rule be over 95% full, or there will not be sufficient ullage space for thermal expansion. The extent of thermal expansion may be calculated for each cargo on the basis of the following formula:
ΔV = Va · γ · ΔT
Ve = Va (1 + γ · ΔT)
| ΔV |
: |
change in volume |
| Va |
: |
volume at initial temperature a |
| Ve |
: |
final volume at temperature e |
| γ |
: |
coefficient of cubic (thermal) expansion |
| ΔT |
: |
temperature difference in degrees kelvin |
Tank containers intended for transporting foodstuffs must be labeled "Potable Liquids only".
Some hazardous materials must be transported in tank containers with no in- or outlet openings below the surface of the liquid.
Tank containers are generally designed for an operating pressure of up to 3 bar (above atmospheric). The test pressure used is 4.5 bar (above atmospheric).
If the cargo requires temperature-controlled transport, tank containers can be equipped with insulation or heating. The temperature of the cargo may be precisely controlled using temperature sensors.
Back to beginning
Figure
Figure 1 |
Back to beginning
Dimensions/weights
The following are some of the most important details relating to tank containers.
| 20' tank container |
| External dimensions |
Weights |
Length
External dimension to ISO
[mm] |
Width
External dimension to ISO
[mm] |
Height
External dimension to ISO
[mm] |
Max. gross wt.
[kg] |
Tare weight
[kg] |
Max. payload
[kg] |
| 6058 |
2438 |
2438 |
30480 |
4190 |
26290 |
| 6058 |
2438 |
2591 |
30480 |
4190 |
26290 |
Back to beginning
Use
Tank containers are used for liquid cargoes, such as:
 |
Foodstuffs: fruit juices, spirits, sweet oils |
|
Chemicals: hazardous materials, such as fuels, toxic substances, corrosion protection agents |
Back to beginning
|
