9.3.1 General requirements
9.3.1.1 The potential hazards of the cargoes in group B and falling within the
classification of 9.2.2 and 9.2.3 entail the need for segregation of incompatible cargoes.
Segregation shall also take account of any identified subsidiary hazard.
9.3.1.2 In addition to general segregation as between whole classes of materials, there may
be a need to segregate a particular material from others. In the case of segregation from
combustible materials, this shall be understood not to include packaging material, ceiling
or dunnage; the latter shall, in these circumstances, be kept to a minimum.
9.3.1.3 For the purpose of segregating incompatible materials, the words "hold" and
"compartment" are deemed to mean a cargo space enclosed by steel bulkheads or shell plating
and by steel decks. The boundaries of such a space shall be resistant to fire and liquid.
9.3.1.4 When two or more different solid bulk cargoes of group B are to be carried, the
segregation between them shall be in accordance with 9.3.4.
9.3.1.5 Where different grades of a solid bulk cargo are carried in the same cargo space,
the most stringent segregation provisions applicable to any of the different grades shall
apply to all of them.
9.3.1.6 When solid bulk cargoes of group B and dangerous goods in packaged form are to be
carried, the segregation between them shall be in accordance with 9.3.3.
9.3.1.7 Incompatible materials shall not be handled simultaneously. Upon completion of
loading one cargo, the hatch covers of every cargo space shall be closed and the decks
cleaned of residue before the loading of other material is commenced. When discharging, the
same procedures shall be followed.
9.3.1.8 To avoid contamination, all foodstuffs shall be stowed:
-
.1 “separated from” a material which is indicated as
toxic;
-
.2 “separated by a complete compartment or hold from”
all infectious materials;
-
.3 “separated from” radioactive materials; and
-
.4 “away from” corrosive materials.
-
The terms are defined in 9.3.3 and 9.3.4, as appropriate.
9.3.1.9 Materials which may evolve toxic gases in sufficient quantities to affect health
shall not be stowed in those spaces from where such gases may penetrate into living
quarters or ventilation systems connecting to living quarters.
9.3.1.10 Materials which present corrosive hazards of such intensity as to affect either
human tissue or the ship's structure shall only be loaded after adequate precautions and
protective measures have been taken.
9.3.1.11 After discharge of toxic or oxidizing cargoes, the spaces used for their carriage
shall be inspected for contamination before being used for other cargoes. A space which has
been contaminated shall be properly cleaned and examined before being used for other
cargoes.
9.3.1.12 After discharge of cargoes, a close inspection shall be made for any residue,
which shall be removed before the ship is presented for other cargoes.
9.3.1.13 For cargoes for which in case of an emergency the hatches shall be opened, these
hatches shall be kept free to be capable of being opened up.
9.3.2 Special requirements
9.3.2.1 Materials of classes 4.1, 4.2 and 4.3
9.3.2.1.1 Materials of these classes shall be kept as cool and dry as reasonably
practicable and, unless expressly provided otherwise in this Code, shall be stowed "away
from" all sources of heat or ignition.
9.3.2.1.2 Electrical fittings and cables shall be in good condition and properly
safeguarded against short circuits and sparking. Where a bulkhead is required to be
suitable for segregation purposes, cable and conduit penetrations of the decks and
bulkheads shall be sealed against the passage of gas and vapour.
9.3.2.1.3 Cargoes liable to give off vapours or gases which can form an explosive mixture
with air shall be stowed in a mechanically ventilated space.
9.3.2.1.4 Prohibition of smoking in dangerous areas shall be enforced, and clearly legible
"NO SMOKING" signs shall be displayed.
9.3.2.2 Materials of class 5.1
9.3.2.2.1 Cargoes of this class shall be kept as cool and dry as reasonably practicable
and, unless expressly provided otherwise in this Code, shall be stowed "away from" all
sources of heat or ignition. They shall also be stowed "separated from" other combustible
materials.
9.3.2.2.2 Before loading cargoes of this class, particular attention shall be given to the
cleaning of the cargo spaces into which they will be loaded. As far as reasonably
practicable, non-combustible securing and protecting materials shall be used and only a
minimum of dry wooden dunnage shall be used.
9.3.2.2.3 Precautions shall be taken to avoid the penetration of oxidizing materials into
other cargo spaces, bilges and other spaces which may contain a combustible material.
9.3.2.3 Materials of class 7
9.3.2.3.1 Cargo spaces used for the transport of Low Specific Activity Materials
(LSA-I) and Surface Contaminated Objects (SCO-I) shall not be used for other cargoes until
decontaminated by a qualified person so that the non-fixed contamination on any surface
when averaged over an area of 300 cm2 does not exceed the following levels:
| 4 Bq/cm2 (10-4
μCi/cm2)
|
for beta and gamma emitters and the low-toxicity
alpha emitters; natural uranium; natural thorium; uranium-235 or
uranium-238; thorium-232; thorium-228 and thorium-230 when contained in
ores, physical or chemical concentrates; radionuclides with a half-life of
less than 10 days; and
|
| 0.4 Bq/cm2 (10-5
μCi/cm2)
|
for all other alpha emitters.
|
9.3.2.4 Materials of class 8 or materials having similar properties
9.3.2.4.1 These cargoes shall be kept as dry as reasonably practicable.
9.3.2.4.2 Prior to loading these cargoes attention shall be given to the cleaning of the
cargo spaces into which they will be loaded, particularly to ensure that these spaces are
dry.
9.3.2.4.3 Penetration of these materials into other cargo spaces, bilges, wells and between
the ceiling boards shall be prevented.
9.3.2.4.4 Particular attention shall be given to the cleaning of the cargo spaces after
unloading, as residues of these cargoes may be highly corrosive to the ship's structure.
Hosing down of the cargo spaces followed by careful drying shall be considered.
9.3.3 Segregation between bulk materials possessing chemical hazards and dangerous goods
in packaged form
9.3.3.1 Unless otherwise required in this section or in the individual schedules,
segregation between solid bulk cargoes of group B and dangerous goods in packaged form
shall be in accordance with the following table.
9.3.3.2 The Dangerous Goods List of the IMDG Code shall be consulted for additional
requirements with regard to stowage and segregation of packaged dangerous goods.
|
|
Dangerous goods in packaged form
|
|
Bulk cargo (classified as dangerous goods)
|
Class/ Division
|
1.1
1.2
1.5
|
1.3
|
1.4
|
2.1
|
2.2
2.3
|
3
|
4.1
|
4.2
|
4.3
|
5.1
|
5.2
|
6.1
|
6.2
|
7
|
8
|
9
|
| Flammable
solids
|
4.1
|
4
|
3
|
2
|
2
|
2
|
2
|
X
|
1
|
X
|
1
|
2
|
X
|
3
|
2
|
1
|
X
|
| Substances liable
to spontaneous combustion
|
4.2
|
4
|
3
|
2
|
2
|
2
|
2
|
1
|
X
|
1
|
2
|
2
|
1
|
3
|
2
|
1
|
X
|
| Substances which,
in contact with water, emit flammable gases
|
4.3
|
4
|
4
|
2
|
2
|
X
|
2
|
X
|
1
|
X
|
2
|
2
|
X
|
2
|
2
|
1
|
X
|
| Oxidizing
substances (agents)
|
5.1
|
4
|
4
|
2
|
2
|
X
|
2
|
1
|
2
|
2
|
X
|
2
|
1
|
3
|
1
|
2
|
X
|
| Toxic
substances
|
6.1
|
2
|
2
|
X
|
X
|
X
|
X
|
X
|
1
|
X
|
1
|
1
|
X
|
1
|
X
|
X
|
X
|
| Radioactive
materials
|
7
|
2
|
2
|
2
|
2
|
2
|
2
|
2
|
2
|
2
|
1
|
2
|
X
|
3
|
X
|
2
|
X
|
| Corrosive
substances
|
8
|
4
|
2
|
2
|
1
|
X
|
1
|
1
|
1
|
1
|
2
|
2
|
X
|
3
|
2
|
X
|
X
|
| Miscellaneous
dangerous substances and articles
|
9
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
| Materials hazardous
only in bulk (MHB)
|
MHB
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
3
|
X
|
X
|
X
|
Numbers relate to the following segregation terms:
| 1
|
“Away
from”:
|
|
|
|
Effectively segregated so that incompatible materials cannot
interact dangerously in the event of an accident but may be carried in the
same hold or compartment or on deck provided a minimum horizontal separation
of 3 metres, projected vertically, is provided.
|
| 2
|
“Separated from”:
|
|
|
|
In different holds when stowed under deck. Provided an
intervening deck is resistant to fire and liquid, a vertical separation,
i.e. in different compartments, may be accepted as equivalent to this
segregation.
|
| 3
|
“Separated by a complete compartment or hold from”:
|
|
|
|
Means
either a vertical or a horizontal separation. If the decks are not resistant
to fire and liquid, then only a longitudinal separation, i.e. by an
intervening complete compartment, is acceptable.
|
| 4
|
“Separated longitudinally by an intervening complete compartment
or hold from”:
|
|
|
|
Vertical separation alone does not meet this requirement.
|
| X
|
Segregation, if any, is shown in the Dangerous Goods List of the
IMDG Code or in the individual schedules in this Code.
|
|
|
Legend
|
|
|
|
Reference bulk material
|
|
|
|
Packages containing incompatible goods
|
|
|
|
Deck resistant to liquid and fire
|
|
|
| Note:
|
Vertical lines represent transverse watertight bulkheads between
cargo spaces.
|
9.3.4 Segregation between solid bulk cargoes possessing chemical hazards
Unless otherwise required in this section or in the individual schedules for cargoes of
group B, segregation between solid bulk cargoes possessing chemical hazards shall be
according to the following table:
| Solid
bulk materials
|
|
|
Class/ Division
|
4.1
|
4.2
|
4.3
|
5.1
|
6.1
|
7
|
8
|
9
|
MHB
|
| Flammable solids
|
4.1
|
X
|
|
|
|
|
|
|
|
|
| Substances liable to spontaneous combustion
|
4.2
|
2
|
X
|
|
|
|
|
|
|
|
| Substances which, in contact with water, emit flammable
gases
|
4.3
|
3
|
3
|
X
|
|
|
|
|
|
|
| Oxidizing substances
|
5.1
|
3
|
3
|
3
|
X
|
|
|
|
|
|
| Toxic substances
|
6.1
|
X
|
X
|
X
|
2
|
X
|
|
|
|
|
| Radioactive materials
|
7
|
2
|
2
|
2
|
2
|
2
|
X
|
|
|
|
| Corrosive substances
|
8
|
2
|
2
|
2
|
2
|
X
|
2
|
X
|
|
|
| Miscellaneous dangerous substances and articles
|
9
|
X
|
X
|
X
|
X
|
X
|
2
|
X
|
X
|
|
| Materials hazardous only in bulk (MHB)
|
MHB
|
X
|
X
|
X
|
X
|
X
|
2
|
X
|
X
|
X
|
Numbers relate to the following segregation terms:
| 2
|
“Separated from”:
|
|
|
|
In
different holds when stowed under deck. Provided an intervening deck is
resistant to fire and liquid, a vertical separation, i.e. in different
compartments, may be accepted as equivalent to this segregation.
|
| 3
|
“Separated by a complete compartment or hold from”:
|
|
|
|
Either a vertical or a horizontal separation. If the decks are
not resistant to fire and liquid, then only a longitudinal separation, i.e.
by an intervening complete compartment, is acceptable.
|
| X
|
Segregation, if any, is shown in the individual schedules in this
Code.
|
|
|
Legend
|
|
|
|
Reference bulk material
|
|
|
|
Incompatible bulk material
|
|
|
|
Deck resistant to liquid and fire
|
|
| Note:
|
Vertical lines represent transverse watertight bulkheads between
cargo spaces.
|