Packaging, containment, and segregation requirements
What this domain tests
This domain tests whether you can recognise approved packaging, check that it is closed and undamaged, and keep incompatible goods apart. Packaging performance and segregation prevent leaks, reactions and contamination during normal road movement.
Core rules
- UN packaging codes identify the package type and performance level, for example a steel drum or fibreboard box. The code includes a packing group performance mark: X for PG I, Y for PG II and Z for PG III.
- The package must be approved for the substance, the packing group and the quantity. Closures must be tight and compatible with the contents.
- Segregate according to the dangerous goods segregation table. Acids must not be stowed with cyanides because acid can release hydrogen cyanide; oxidizers must be kept from flammables; dangerous goods must be separated from foodstuffs.
- Reject leaking, corroded, swollen or badly dented packaging. Overpacks must be marked and must not hide the original labels.
Worked example
A load includes sulphuric acid in Class 8 packaging and sacks of sodium cyanide. Reasoning: both are dangerous goods, but they are incompatible. If the acid leaks onto cyanide, toxic hydrogen cyanide gas can form. They must not be loaded together in the same compartment without effective segregation approved by the consignor. The correct action is to separate them or refuse the mixed load.
Traps
Assuming any drum is suitable; confusing the X/Y/Z performance mark with the hazard class; accepting damaged packaging because the label is intact; stowing acids and cyanides together; putting food in the same compartment as toxic or corrosive goods.