VOLUME
1 - part 7
PROVISIONS CONCERNING TRANSPORT OPERATIONS
• 7. 1. Stowage
• 7.2. Segregation
• 7.3. Transport of cargo transport units on board ships
• 7.4 Packing of cargo transport units
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CHAPTER 7.1
7.1.1 General provisions
Except in class 1, ships are
divided into two groupings:
•
(1)-(2) ON DECK OR UNDER DECK
 Stowage category B
(1) ON DECK OR UNDER DECK
(2) ON DECK ONLY
Cargo ships or passenger ships
carrying ≤ 25 passengers or 1
passenger per 3 metres of
overall length (1)
•
 Stowage category A
Other passenger ships in which
the limiting number of
passengers is exceeded (2)
 Stowage category C
(1)-(2) ON DECK ONLY
 Stowage category D
(1) ON DECK ONLY
(2) PROHIBITED
 Stowage category E
(1) ON DECK OR UNDER DECK
(3) PROHIBITED
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CHAPTER 7.1
7.1.1 General provisions

When DGL indicates: shaded from radiant heat, stowage under
deck shall be “away from” sources of heat

When DGL indicates: protection from sources of heat, this
includes “away from” sparks, flames, steam pipes, heating coils, top
or side walls of heated fuel and cargo tanks, and bulkheads of
machinery spaces

Portable tanks shall not be overstowed by other cargo transport units
unless they are designed for that purpose and transported in
specially designed ships, or unless they are specially protected to the
satisfaction of the competent authority
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CHAPTER 7.1
7.1.2 Stowage in relation to living quarters

Accommodation

Machinery spaces

Other work areas
1.
Needed for TOXIC
SUBSTANCES
2.
Needed for CORROSIVE
SUBSTANCES
3.
SUBSTANCES WHICH, IN
MOIST AIR, PRODUCE TOXIC
OR CORROSIVE VAPOURS
4.
SUBSTANCES WHICH
EVOLVE STRONGLY
NARCOTIC VAPOURS
5.
FLAMMABLE, TOXIC OR
CORROSIVE GASES OF
CLASS 2
True entrances
True openings in
bulkheads
True the ventilation
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CHAPTER 7.1
7.1.4 Stowage of marine pollutants

Where stowage is permitted on deck or under deck, under deck
stowage is preferred
(except when a weather deck provides equivalent protection)

Where stowage on deck only is required, preference shall be given to
stowage on well-protected decks or stowage inboard in sheltered
areas of exposed decks
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CHAPTER 7.1
7.1.5 Stowage in relation to foodstuffs

The class 6.1 PG I and II or class 2.3: “separated from” foodstuffs,
except when the substances and the foodstuffs are in different closed
cargo transport units: no segregation
CLASS
SEGREGATION
6.2 (infectious "separated by a complete
substances) compartment or hold from"
7 (radioactive
substances)
8 (corrosive
substances)
6.1 PG III
"separated from"
"away from"
"away from"
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CHAPTER 7.1
7.1.8 Stowage of goods of class 2 (2.1 flammable gases, 2.2 no flammable, no toxic gases, 2.3 toxic
gases)

General stowage precautions
•
When stowed on deck, receptacles shall be protected from
radiant heat, which includes protection from direct sunlight
•
Receptacles stowed under deck shall be stowed in
mechanically ventilated cargo areas

Stowage precautions for flammable gases
•
Protect flammable gases from heat
•
In enclosed cargo spaces mechanical ventilation shall be
provided
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CHAPTER 7.1
7.1.9 Stowage of goods of class 3 ( Flammable liquids)

The goods shall be kept as cool as reasonably possible

Away from all possible sources of heat

Protection shall be provided which shall effectively remove flammable
vapours from the cargo space

Liquids with FP ≤23°C in portable tanks: vapors unlikely to penetrate
the accomodation, machinery spaces and other work areas
(openings in bulkheads; ventilation systems!)
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CHAPTER 7.1
7.1.9 Stowage of goods of classes 4.1,4.2 and 4.3
(4.1 = flammable solids, 4.2 = self-reactive substances, 4.3 = substances flammable in contact with water)

The goods shall be kept as cool as reasonably possible

Away from all possible sources of heat

It may be necessary during the voyage to jettison (throw over board)
packages if there is danger of involvement in a fire. This shall be
borne in mind when stowage is permitted under deck
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CHAPTER 7.1
7.1.10 Stowage of goods of classes 4.1,4.2 and 4.3

Stowage precautions for FISHMEAL (UNSTABILIZED: UN 1374;
STABILIZED: UN 2216) in containers
•
Doors and other openings sealed to prevent air penetration
into the unit
•
1x/day (morning) temperature readings in the hold
•
Possible need to apply copious quantities of water: stability!
•
Stowage clear of pipes and bulkheads which are liable to
become heated
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CHAPTER 7.1
7.1.11 Stowage of goods of class 5.1 (oxidizing substances)

AMMONIUM NITRATE UN 1942 and AMMONIUM NITRATE
BASED FERTILIZERS UN2067:
•
May be stowed under deck in a clean cargo space capable of
being opened up in an emergency
•
To be considered for loading:
The possible need to open hatches in case of fire (max.
ventilation)
The possible need to apply water and the consequent
risk to the stability of the ship
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CHAPTER 7.1
7.1.12 Stowage of goods of class 5.2 (organic peroxides)

Organic peroxides: stowage category D

Organic peroxides shall be stowed away from living quarters or acces
to them

Organic peroxides shall be stowed away from sources of heat

Protected from direct sunshine and stowed in a cool, well-ventilated
place

It may become necessary to take the appropriate emergency action,
such as jettisoning
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CHAPTER 7.1
7.1.13 Stowage of goods of class 6.1 ( toxic substances)

Toxic substances which are also flammable liquids
•
Stowed in a mechanically ventilated space
•
Kept as cool as reasonably practicable
•
Should be stowed “away from” all sources of heat
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CHAPTER 7.1
7.1.15 Stowage of goods of class 8 ( corrosive substances)

All substances for which unprotected plastics packagings are
permitted shall be kept as cool as reasonably practicable as the
resistance of most plastics decreases at high temperatures

Corrosive substances which are also flammable liquids
•
Stowed in a mechanically ventilated space
•
Kept as cool as reasonably practicable
•
Should be stowed “away from” all sources of heat
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CHAPTER 7.1
7.1.16 Stowage of goods of class 9

AMMONIUM NITRATE BASED FERTILIZER UN2071
•
In case of fertilizer in containers it is sufficiënt if, in case of an
emergency, the cargo is accessible trough free approaches
(hatch entries), and mechanical ventilation enables the master to
exhaust any gases or fumes resulting from decomposition

To be considered before loading:
•
The possible need to open hatches in case of fire (max.
ventilation)
•
The possible need to apply water and the consequent risk to the
stability of the ship
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CHAPTER 7.1
7.1.16 Stowage of goods of class 9

AMMONIUM NITRATE BASED FERTILIZER UN2071
•
Shall be stowed out of direct contact with a metal engine-room
bulkhead (need to apply to short international voyages)

FISHMEAL, STABILIZED UN 2216: see class 5.1
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Please wake up!
I’m not finished yet! 
CHAPTER 7.1
Seperate they’re dangerous,
Together they’re deadly
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Quick segregation Guide
Quick segregation guide
CHAPTER 7.2
7.2.1 General
The following segregation terms are used throughout this Code:
1.
“Away from” (3 metres)
2.
“Separated from” (6 metres)
3.
“Separated by a complete compartment or hold from” (12 metres)
4.
“Separated longitudinally by an intervening complete compartment
or hold from” (24 metres)
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CHAPTER 7.2
7.2.1 General
In addition to the general provisions, there may be a need to segregate
a particular substance, material or article from other goods which
could contribute to its hazard.
Particular provisions for segregation are indicated in the DGL and, in
the case of conflicting provisions, always take precedence over the
general provisions.
UN1001
UN1597
UN1017
UN2048
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CHAPTER 7.2
7.2.1 General
Except for class 1, the segregation provisions for substances, materials
or articles having more than two hazards (2 or more subsidiary risk
labels) are given in the DGL.
UN1045
UN1295
UN1036
UN 1308
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CHAPTER 7.2
7.2.2 Segregation groups
UN1935
UN2785
UN3367
UN1939
UN3253
UN2024
Similar technical properties
1
acids
2
ammonium compounds
3
bromates
4
chlorates
5
chorites
6
cyanides
7
heavy metals and their safts
8
hypochlorite's
9
lead and its compounds
10
liquid halogenated hydrocarbons
11
mercury and mercury compounds
12
nitrites and their mixtures
13
perchlorates
14
permanganates
15
powdered metals
16
peroxides
17
azides
18
alkalia
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CHAPTER 7.2
7.2.1.7 N.O.S entries ( not otherwise specified)
It is recognized that not all substances falling within a segregation
group are listed in the Code by name. These substances are
shipped under N.O.S entries. Although these entries are not listed
themselves in the above groups, the shipper shall decide whether
allocation under the segregation group is appropriate.
UN 1760 CORROSIVE LIQUID, N.O.S.
UN 2924 FLAMMABLE LIQUID, CORROSIVE, N.O.S.
UN 3098 OXIDIZING LIQUID, CORROSIVE, N.O.S.
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CHAPTER 7.2
NO SEGREGATION
REQUIRED
7.2.1.11 Substances of the same class
Substances of the same class may be stowed together without
regards to segregation required by secondary hazards (subsidary
risk labels), provided the substances do not react dangerously
with each other and cause:
1. Combustion and/or evolution of considerable heat
2. Evolution of flammable, toxic gases
3. The formation of corrosive substances
4. The formation of unstable substances
EXPLANATION PRODUCER (MSDS)
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CHAPTER 7.2
NO SEGREGATION
REQUIRED
7.2.1.11 Special provisions
No segregation needs to be applied between dangerous goods of
different classes which comprise the same substance but vary
only in their water content.
Example:
UN 1385 SODIUM SULPHIDE, ANHYDROUS (waterfree)
class 4.2
UN 1849 SODIUM SULPHIDE, HYDRATED class 8
With not less than 30% water
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CHAPTER 7.2
NO SEGREGATION
REQUIRED
7.2.1.11 Special provisions
UN
PSN
Class
Subs. Risk
2014
HYDROGEN PEROXIDE, AQUEOUS SOLUTION
5.1
8
2984
HYDROGEN PEROXIDE, AQUEOUS SOLUTION
5.1
-
3105
ORGANIC PEROXIDE TYPE D, LIQUID
5.2
8
3107
ORGANIC PEROXIDE TYPE E, LIQUID
5.2
8
3109
ORGANIC PEROXIDE TYPE F, LIQUID
5.2
8
3149
HYDROGEN PEROXIDE AND PEROXYACETIC
ACID, MIXTURE, STABILIZED
5.1
8
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NO SEGREGATION
REQUIRED
CHAPTER 7.2
7.2.1.11 Special provisions
UN
PSN
1295
TRICHLOROSILANE
1818
SILICON TETRACHLORIDE
2189
DICHLOROSILANE
Class
Subs. Risk
4.3
3/8
8
-
2.3
2.1/8
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1. “Away from”
Reference package
Package containing
incompatible goods
PROHIBITED
STOWAGE
AREA
3 METERS
3 METERS
PROHIBITED
STOWAGE
AREA
If the same compartment or
hold or on deck if horizontal
separation of 3m, projected
vertically
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1. “Separated from”
Deck resistant
to fire and liquid
Under deck: in different
compartments or holds
On deck: at least 6m
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3. “Seperated by a complete compartement or hold
from”
12m
Vertical or horizontal
separation
If intervening decks not
resistant to fire and liquid:
only longitudinal
separation
On deck: at least 12m
One of the two decks must be resistant to
fire and liquid
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4.“Seperated longitudinally by an intervening
complete compartment or hold from”
24m including intervening
compartment
Vertical separation
alone does not meet
this requirement
On deck: at least 24m
from eachother
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SEGREGATION
SEGREGATION IN CARGO TRANSPORT UNITS
3 possibilities
 Allowed
 Allowed under conditions
 Forbidden
Port authorities
 TABEL
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Can you load them together in a
container?
UN 1263
UN 1993
UN 2078
Can you load them together in a
container?
3 UN 1263
3 UN 1993
6.1 UN 2078
YES, can be loaded in 1 container
Can you load them together in a
container?
UN 1965
UN 1726
Can you load them together in a
container?
2.1 UN 1965
8 UN 1726
NO, “away from” eachother
Can you load them together in a
container?
UN 2727
UN 2966
Can you load them together in a
container?
6.1/5.1 UN 2727
6.1 UN 2966
NO, “away from” eachother
Can you load them together in a
container?
UN 1300
UN 2601
Can you load them together in a
container?
3 UN 1300
2.1 UN 2601
NO, “seperate from” eachother
Can you load them together in a
container?
UN 1300
UN 1950
Can you load them together in a
container?
3 UN 1300
2 UN 1950 ( as for class 9)
YES, can be loaded in 1 container
Can you load them together in a
container?
UN 1305
UN 3295
UN 3084
Can you load them together in a
container?
3/8 UN 1305
3
UN 3295
8/5.1 UN 3084
NO, “seperate from” eachother
Can you load them together in a
container?
UN 3265
UN 1835
Can you load them together in a
container?
8 UN 3265 (ACIDS)
8 UN 1835 ( SEPERATE FROM ACIDS)
NO, not allowed
Can you load them together in a
container?
UN 1750
UN 2744
UN 1022
Can you load them together in a
container?
6.1/8 UN 1750 (ACID)
6.1/3/8
UN 2744 (ACID, as 3, away 4.1)
2.2
UN 1022
NO, “away from” eachother
Can you load them together in a
container?
UN 2427
UN 2071
Can you load them together in a
container?
5.1 UN 2427 (seperate from ammonium compounds,
cyanides and sulphur)
9 UN 2071 ( ammonium compounds)
No, can not be loaded in 1 container
Can you load them together in a
container?
UN 3082
UN 1080
UN 2859
Can you load them together in a
container?
9
2.2
6.1
UN 3082
UN 1080
UN 2859 (as 5.1, but away from 4.1, 5.1 and 7)
Yes, can be loaded in 1 container
Can you load them together in a
container?
UN 3109
UN 3149
Can you load them together in a
container?
5.2/8
UN 3109
5.1/8 (PG II)
UN 3149
YES, can be loaded in 1 container!
CHAPTER 7.2
NO SEGREGATION
REQUIRED
7.2.1.11 Special provisions
UN
PSN
Class
Subs. Risk
2014
HYDROGEN PEROXIDE, AQUEOUS SOLUTION
5.1
8
2984
HYDROGEN PEROXIDE, AQUEOUS SOLUTION
5.1
-
3105
ORGANIC PEROXIDE TYPE D, LIQUID
5.2
8
3107
ORGANIC PEROXIDE TYPE E, LIQUID
5.2
8
3109
ORGANIC PEROXIDE TYPE F, LIQUID
5.2
8
3149
HYDROGEN PEROXIDE AND PEROXYACETIC
ACID, MIXTURE, STABILIZED
5.1
8
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