IMDG Segregation

 SEGREGATION OF IMDG CARGO

IMDG Code, Vol. 1, chapter 7.2 gives all the information on segregation. Basically, there are 4 types of segregation:

1 - Away from - Effectively segregated so that the incompatible goods cannot interact dangerously in the event of an accident but may be transported in the same compartment or hold or on deck, provided a minimum horizontal separation of 3 metres, projected vertically, is obtained.

 

2 - Separated from - In different compartments or holds when stowed under deck. Provided the intervening deck is resistant to fire and liquid, a vertical separation, i.e. in different compartments, may be accepted as equivalent to this segregation. For on deck stowage, this segregation means a separation by a distance of at least 6 metres horizontally.

3 - Separated by a complete compartment or hold from – There must be either a vertical or a horizontal separation. If the intervening decks are not resistant to fire & liquid, then only a longitudinal separation, i.e. by an intervening complete compartment or hold, is acceptable. For on deck stowage, this segregation means a separation by a distance of at least 12 metres horizontally. The same 12m has to be applied if one package is stowed on deck and the other one in an upper compartment. 

4 - Separated longitudinally by an intervening complete compartment or hold from - Vertical separation alone does not meet this requirement. Between a package under deck and one on deck, a minimum distance of 24 metres, including a complete compartment, must be maintained longitudinally. For on deck stowage, this segregation means a separation by a distance of at least 24 metres longitudinally.