THE INTERNATIONAL MARITIME DANGEROUS GOODS (IMDG) CODE
AMENDMENT 38-16
(adopted on 13 May 2016 by MSC.406(96))
enter into force on 1 January 2018
PART
7
PROVISIONS CONCERNING TRANSPORT OPERATIONS
Chapter 7.1. General stowage
provisions
7.1.1 Introduction
This
chapter contains the general provisions for the stowage of dangerous goods in
all types of ships. Specific provisions applicable to, container ships, ro-ro
ships, general cargo ships and barge carrying ships, are stipulated in chapters
7.4 to 7.7.
7.1.2 Definitions
Note
1: The term “magazine” is no longer used in the context of the IMDG
Code. A magazine that is not a fixed part of the ship shall meet the provisions
for a closed cargo transport unit for class 1 (see 7.1.2). A magazine that is a
fixed part of the ship such as compartment, below deck area or hold shall meet
the provisions of 7.6.2.4.
Note
2: Cargo holds cannot be interpreted as closed cargo transport units.
Clear
of living quarters means that packages or cargo transport units shall be stowed a
minimum distance of 3 m from accommodation, air intakes, machinery spaces and
other enclosed work areas.
Closed
cargo transport unit for class 1 means a unit which fully
encloses the contents by permanent structures, can be secured to the ship’s
structure and is, except for division 1.4, structurally serviceable as defined
in this section. Cargo transport units with fabric sides or tops are not closed
cargo transport units. The floor of any closed cargo transport unit shall
either be constructed of wood, close-boarded, or so arranged that goods are
stowed on sparred gratings, wooden pallets or dunnage.
Combustible
material means material which may or may not be dangerous goods but which
is easily ignited and supports combustion. Examples of combustible materials
include wood, paper, straw, vegetable fibres, products made from such
materials, coal, lubricants, and oils. This definition does not apply to
packaging material or dunnage.
Potential sources of ignition means, but is not
limited to, open fires, machinery exhausts, galley uptakes, electrical outlets
and electrical equipment including those on refrigerated or heated cargo
transport units unless they are of certified safe type.*
_____________________
* For cargo spaces, refer
to SOLAS II-2/19.3.2 and for refrigerated or heated cargo transport units refer
to Recommendations published by the International Electrotechnical Commission,
in particular IEC 60079.
Protected
from sources of heat means that packages and cargo transport units shall be stowed at
least 2.4 m from heated ship structures, where the surface temperature is
liable to exceed 55°C. Examples of heated structures are steam pipes, heating
coils, top or side walls of heated fuel and cargo tanks, and bulkheads of
machinery spaces. In addition, packages not loaded inside a cargo transport
unit and stowed on deck shall be shaded from direct sunlight. The surface of a
cargo transport unit can heat rapidly when in direct sunlight in nearly
windless conditions and the cargo may also become heated. Depending on the
nature of the goods in the cargo transport unit and the planned voyage
precautions shall be taken to ensure that exposure to direct sunlight is
reduced.
Stowage
means the proper placement of dangerous goods on board a ship in order to
ensure safety and environmental protection during transport.
Stowage
on deck means stowage on the weather deck. For open ro-ro cargo spaces
see 7.5.2.6.
Stowage
under deck means any stowage that is not on the weather deck. For hatchless
containerships see 7.4.2.1.
Structurally
serviceable for class 1 means the cargo transport unit shall
not have major defects in its structural components, e.g. top and bottom rails,
top and bottom end rails, door sill and header, floor cross-members, corner
posts, and corner fittings in a freight container. Major defects are: dents or
bends in the structural members greater than 19 mm in depth, regardless of
length; cracks or breaks in structural members; more than one splice (e.g. a
lapped splice) in top or bottom end rails or door headers; more than two
splices in any one top or bottom side rail or any splice in a door sill or
corner post; door hinges and hardware that are seized, twisted, broken, missing
or otherwise inoperative; gaskets and seals that do not seal; or, for freight
containers, any distortion of the overall configuration great enough to prevent
proper alignment of handling equipment, mounting and securing on chassis or
vehicle, or insertion into ship’s cells. In addition, deterioration in any
component of the cargo transport unit, regardless of the material of
construction, such as rusted-out metal in sidewalls or disintegrated
fibreglass, is unacceptable. Normal wear, however, including oxidation (rust),
slight dents and scratches and other damage that does not affect serviceability
or the weathertight integrity of the units, is acceptable.
7.1.3 Stowage categories
7.1.3.1
Stowage categories for class 1
Dangerous
goods of class 1 other than division 1.4, compatibility group S, packed in
limited quantities shall be stowed as indicated in column 16a of the Dangerous
Goods List in accordance with one of the categories specified below.
|
Stowage category 01 |
Cargo ships (up to 12 passengers) |
On deck in closed cargo transport unit or under deck |
|
|
Passenger ships |
On deck in closed cargo transport unit or under deck |
|
Stowage category 02 |
Cargo ships (up to 12 passengers) |
On deck in closed cargo transport unit or under deck |
|
|
Passenger ships |
On deck in closed cargo transport unit or under deck in closed
cargo transport unit in accordance with 7.1.4.4.5 |
|
Stowage category 03 |
Cargo ships (up to 12 passengers) |
On deck in closed cargo transport unit or under deck |
|
|
Passenger ships |
Prohibited except if in accordance with 7.1.4.4.5 |
|
Stowage category 04 |
Cargo ships (up to 12 passengers) |
On deck in closed cargo transport unit or under deck in closed
cargo transport unit |
|
|
Passenger ships |
Prohibited except if in accordance with 7.1.4.4.5 |
|
Stowage category 05 |
Cargo ships (up to 12 passengers) |
On deck only in closed cargo transport unit |
|
|
Passenger ships |
Prohibited except if in accordance with 7.1.4.4.5 |
7.1.3.2
Stowage categories for classes 2 to 9
Dangerous
goods of classes 2 to 9 and division 1.4, compatibility group S, packed in
limited quantities shall be stowed as indicated in column 16a of the Dangerous
Goods List in accordance with one of the categories specified below:
|
Stowage
category A |
|
|
Cargo
ships or passenger ships carrying a number of passengers limited to not more
than 25 or to 1 passenger per 3 m of overall length, whichever is the greater
number Other
passenger ships in which the limiting number of passengers transported is
exceeded |
} ON DECK OR UNDER
DECK } }
ON DECK OR UNDER DECK |
|
Stowage category B |
|
|
Cargo ships or passenger ships carrying a number of passengers
limited to not more than 25 or to 1 passenger per 3 m of overall length,
whichever is the greater number Other
passenger ships in which the limiting number of passengers transported is
exceeded |
}
ON DECK OR UNDER DECK } }ON
DECK ONLY |
|
Stowage category C |
|
|
Cargo ships or passenger ships carrying a number of passengers
limited to not more than 25 or to 1 passenger per 3 m of overall length,
whichever is the greater number Other
passenger ships in which the limiting number of passengers transported is
exceeded |
}
ON DECK ONLY } }
ON DECK ONLY |
|
Stowage category D |
|
|
Cargo ships or passenger ships carrying a number of passengers
limited to not more than 25 or to 1 passenger per 3 m of overall length,
whichever is the greater number Other passenger ships in which the limiting number of
passengers transported is exceeded |
}
ON DECK ONLY } } PROHIBITED |
|
Stowage category E |
|
|
Cargo ships or passenger ships carrying a number of passengers
limited to not more than 25 or to 1 passenger per 3 m of overall length,
whichever is the greater number Other passenger ships in which the limiting number of passengers
transported is exceeded |
} ON DECK OR UNDER
DECK } } PROHIBITED |
7.1.4 Special stowage provisions
7.1.4.1
Stowage of empty uncleaned packagings, including IBCs and large packagings
Notwithstanding
the stowage provisions given in the Dangerous Goods List, empty uncleaned
packagings, including IBCs and large packagings, which shall be stowed on
deck only when full may be stowed on deck or under deck in a
mechanically ventilated cargo space. However, empty uncleaned pressure
receptacles which carry a label of class 2.3 shall be stowed on deck only
(see also 4.1.1.11) and waste aerosols shall only be stowed according to column
16a of the Dangerous Goods List.
7.1.4.2
Stowage of marine pollutants
Where
stowage is permitted on deck or under deck, under deck stowage is
preferred. Where stowage on deck only is required, preference shall be
given to stowage on well-protected decks or to stowage inboard in sheltered
areas of exposed decks.
7.1.4.3
Stowage of limited quantities and excepted quantities
For
the stowage of limited quantities and excepted quantities see sections 3.4 and
3.5.
7.1.4.4
Stowage of goods of class 1
7.1.4.4.1
In cargo ships of 500 gross tons or over and passenger ships
constructed before 1 September 1984 and in cargo ships of less than 500 gross
tons constructed before 1 February 1992, goods of class 1 with the exception of
division 1.4, compatibility group S, shall be stowed on deck only,
unless otherwise approved by the Administration.
7.1.4.4.2
Goods of class 1 with the exception of division 1.4 shall be
stowed not less than a horizontal distance of 12 m from living quarters,
life-saving appliances and areas with public access.
7.1.4.4.3
Goods of class 1 with the exception of division 1.4 shall not be
positioned closer to the ship’s side than a distance equal to one eighth of the
beam or 2.4 m, whichever is the lesser.
7.1.4.4.4
Goods of class 1 shall not be stowed within a horizontal distance
of 6 m from potential sources of ignition.
7.1.4.4.5 Stowage on passenger ships
7.1.4.4.5.1
Goods in division 1.4, compatibility group S, may be transported
in any amount on passenger ships. No other goods of class 1 may be transported
on passenger ships except:
.1 goods in compatibility
groups C, D and E and articles in compatibility group G, if the total net
explosive mass does not exceed 10 kg per ship and if they are transported in
closed cargo transport units on deck or under deck;
.2 articles in
compatibility group B, if the total net explosive mass does not exceed 10 kg
per ship and if they are transported on deck only in closed cargo
transport units.
7.1.4.4.6
Alternative arrangements to those prescribed in chapter 7.1 for
class 1 may be approved by the Administration.
7.1.4.5
Stowage of goods of class 7
7.1.4.5.1 The
total activity in a single cargo space of a sea going vessel for transport of
LSA material or SCO in Type IP 1, Type IP 2, Type IP 3 packaging or unpackaged
shall not exceed the limits shown in the table hereunder.
Conveyance activity
limits for LSA material and SCO in industrial packages or unpackaged
|
Nature
of material |
Activity
limit for a seagoing vessel |
|
LSA I |
No
limit |
|
LSA II and LSA III
non-combustible solids |
No
limit |
|
LSA II and LSA III combustible solids, and all liquids and gases |
100A2 |
|
SCO |
100A2 |
7.1.4.5.2
Provided that its average surface heat flux does not exceed 15 W/m2
and that the immediately surrounding cargo is not in sacks or bags, a package
or overpack may be transported or stored among packaged general cargo without
any special stowage provisions except as may be specifically required by the
competent authority in an applicable certificate of approval.
7.1.4.5.3
Loading of freight containers and accumulation of packages, overpacks and
freight containers shall be controlled as follows:
.1 Except under the
condition of exclusive use, the total number of packages, overpacks and freight
containers aboard a single conveyance shall be so limited that the total sum of
the transport indexes aboard the conveyance does not exceed the values shown in
the table hereunder. For consignments of LSA I material there shall be no limit
on the sum of the transport indexes.
TI limits for freight containers and conveyances not under
exclusive use
|
Type
of freight container or conveyance |
Limit
on total sum of transport indexes in a freight container or aboard a
conveyance |
|
Freight container Small freight container Large freight container |
50 50 |
|
Vehicle |
50 |
|
Inland water-way
vessel (barge) |
50 |
|
Seagoing vessela 1 Hold,
compartment or defined deck area Packages, overpacks, small freight
containers Large freight containers (closed containers) |
50 200 |
|
2 Total vessel Packages,
overpacks, small freight containers Large freight containers (closed containers) |
200 No
limit |
a Packages or overpacks transported in or on a
vehicle which are in accordance with the provisions of 7.1.4.5.5 may be
transported by vessels provided that they are not removed from the vehicle at
any time while on board the ship.
.2 Where a consignment is
transported under exclusive use, there shall be no limit on the sum of the
transport indexes aboard a single conveyance.
.3 The radiation level
under routine conditions of transport shall not exceed 2 mSv/h at any point on,
and 0.1 mSv/h at 2 m from, the external surface of the conveyance, except for
consignments transported under exclusive use by road or rail, for which the
radiation limits around the vehicle are specified in 7.1.4.5.5.2 and
7.1.4.5.5.3.
.4 The total sum of the
criticality safety indexes in a freight container and aboard a conveyance shall
not exceed the values shown in the table hereunder.
CSI limits for freight containers and conveyances containing
fissile material
|
Type
of freight container or conveyance |
Limit
on total sum of criticality safety indexes in a freight container or aboard a
conveyance |
|
|
Not
under exclusive use |
Under
exclusive use |
|
|
Freight container Small freight container Large freight container |
50 50 |
n.a.
100 |
|
Vehicle |
50 |
100 |
|
Inland water-way
vessel (barge) |
50 |
100 |
|
Seagoing vessela 1 Hold,
compartment or defined deck area Packages, overpacks, small freight containers Large freight containers (closed containers) |
50 50 |
100 100 |
|
2 Total vessel Packages,
overpacks, small freight containers Large freight containers (closed containers) |
200b
No
limitb |
200c
No
limitc |
a Packages or overpacks transported in or on a vehicle which are in
accordance with the provisions of 7.1.4.5.5 may be transported by ships
provided that they are not removed from the vehicle at any time while on board
the ship. In that case, the entries under the heading “under exclusive use”
apply.
b The consignment shall be so handled and stowed that the total sum
of CSIs in any group does not exceed 50, and that each group is handled and
stowed so as to maintain a spacing of at least 6 m from other groups.
c The consignment shall be so handled and stowed that the total sum
of CSIs in any group does not exceed 100, and that each group is handled and
stowed so as to maintain a spacing of at least 6 m from other groups. The
intervening space between groups may be occupied by other cargo.
7.1.4.5.4 Any
package or overpack having either a transport index greater than 10, or any
consignment having a criticality safety index greater than 50, shall be
transported only under exclusive use.
7.1.4.5.5 For
consignments under exclusive use, the radiation level shall not exceed:
.1 10 mSv/h at any point
on the external surface of any package or overpack, and may only exceed 2 mSv/h
provided that:
.1 the vehicle is
equipped with an enclosure which, during routine conditions of transport,
prevents the access of unauthorized persons to the interior of the enclosure,
and
.2 provisions are made to
secure the package or overpack so that its position within the vehicle
enclosure remains fixed during routine conditions of transport, and
.3 there is no loading or
unloading during the shipment;
.2 2 mSv/h at any point
on the outer surfaces of the vehicle, including the upper and lower surfaces,
or, in the case of an open vehicle, at any point on the vertical planes
projected from the outer edges of the vehicle, on the upper surface of the
load, and on the lower external surface of the vehicle; and
.3 0.1 mSv/h at any point
2 m from the vertical planes represented by the outer lateral surfaces of the
vehicle, or, if the load is transported in an open vehicle, at any point 2 m
from the vertical planes projected from the outer edges of the vehicle.
7.1.4.5.6 In
the case of road vehicles, no persons other than the driver and assistants
shall be permitted in vehicles carrying packages, overpacks or freight
containers bearing category II-YELLOW or III-YELLOW labels.
7.1.4.5.7
Packages or overpacks having a surface radiation level greater than 2 mSv/h,
unless being transported in or on a vehicle under exclusive use in accordance
with the table under 7.1.4.5.3, footnote (a), shall not be transported by ship
except under special arrangement.
7.1.4.5.8 The
transport of consignments by means of a special use ship which, by virtue of
its design or by reason of its being chartered, is dedicated to the purpose of
carrying radioactive material shall be excepted from the provisions specified
in 7.1.4.5.3 provided that the following conditions are met:
.1 a radiation protection
programme for the shipment shall be approved by the Administration and, when
requested, by the competent authority at each port of call;
.2 stowage arrangements
shall be predetermined for the whole voyage, including any consignments to be
loaded at ports of call en route; and
.3 the loading, transport
and unloading of the consignments shall be supervised by persons qualified in
the transport of radioactive material.
7.1.4.5.9 Any
conveyance and equipment used regularly for the transport of radioactive
material shall be periodically checked to determine the level of contamination.
The frequency of such checks shall be related to the likelihood of
contamination and the extent to which radioactive material is transported.
7.1.4.5.10
Except as provided in 7.1.4.5.11, any conveyance, or equipment or part thereof,
which has become contaminated above the limits specified in 4.1.9.1.2 in the
course of the transport of radioactive material, or which shows a radiation level
in excess of 5 µSv/h at the surface, shall be decontaminated as soon as
possible by a qualified person and shall not be re-used unless the following
conditions are fulfilled:
.1 the
non-fixed contamination shall not exceed the limits specified in 4.1.9.1.2;
.2 the radiation level resulting from the fixed
contamination shall not exceed 5 μSv/h at the surface.
7.1.4.5.11 A
freight container, tank, IBC or conveyance dedicated to the transport of
unpackaged radioactive material under exclusive use shall be excepted from the
provisions of 4.1.9.1.4 and 7.1.4.5.10 solely with regard to its internal
surfaces and only for as long as it remains under that specific exclusive use.
7.1.4.5.12
Where a consignment is undeliverable, the consignment shall be placed in a safe
location and the appropriate competent authority shall be informed as soon as
possible and a request made for instructions on further action.
7.1.4.5.13
Radioactive material shall be segregated sufficiently from crew and passengers.
The following values for dose shall be used for the purpose of calculating
segregation distances or radiation levels:
.1 for crew in regularly
occupied working areas, a dose of 5 mSv in a year;
.2 for passengers, in
areas where the passengers have regular access, a dose of 1 mSv in a year,
taking account of the exposures expected to be delivered by all other relevant
sources and practices under control.
7.1.4.5.14
Category II-YELLOW or III-YELLOW packages or overpacks shall not be transported
in spaces occupied by passengers, except those exclusively reserved for
couriers specially authorized to accompany such packages or overpacks.
7.1.4.5.15 Any
group of packages, overpacks and freight containers containing fissile material
stored in transit in any one storage area shall be so limited that the total
sum of the criticality safety indexes in the group does not exceed 50. Each
group shall be stored so as to maintain a spacing of at least 6 m from other
such groups.
7.1.4.5.16
Where the total sum of the criticality safety indexes on board a conveyance or
in a freight container exceeds 50, as permitted in the table under 7.1.4.5.3.4,
storage shall be such as to maintain a spacing of at least 6 m from other
groups of packages, overpacks or freight containers containing fissile material
or other conveyances carrying radioactive material.
7.1.4.5.17 Any
departure from the provisions in 7.1.4.5.15 and 7.1.4.5.16 shall be approved by
the Administration and, when requested, by the competent authority at each port
of call.
7.1.4.5.18 The
segregation requirements specified in 7.1.4.5.13 may be established in one of
the following two ways:
– by following the
segregation table for persons (table 7.1.4.5.18) in respect of living quarters
or spaces regularly occupied by persons.
– by demonstration that,
for the following indicated exposure times, the direct measurement of the radiation
level in regularly occupied spaces and living quarters is less than:
for
the crew:
0.0070
mSv/h up to 700 h in a year, or
0.0018
mSv/h up to 2750 h in a year; and
for
the passengers:
0.0018
mSv/h up to 550 h in a year,
taking
into account any relocation of cargo during the voyage. In all cases, the
measurements of radiation level must be made and documented by a suitably
qualified person.
7.1.4.6
Stowage of dangerous goods under temperature control
7.1.4.6.1
When stowage arrangements are made, it shall be borne in mind that it may
become necessary to take the appropriate emergency action, such as jettisoning
or flooding of the container with water, and the temperature needs to be
monitored in accordance to 7.3.7. If, during transport, the control temperature
is exceeded, an alerting procedure shall be initiated involving either repair
of the refrigeration machinery or an increase in the cooling capacity (such as
by adding liquid or solid refrigerants). If an adequate cooling capacity is not
restored, emergency procedures shall be started.
Table 7.1.4.5.18 –
CLASS 7 – Radioactive material
Segregation table for
persons
|
Sum of transport indices (TI) |
Segregation distance of radioactive material from passengers and
crew |
|||||
|
General cargo ship1 |
Ferry, etc.2 |
Offshore support vessel3 |
||||
|
Break bulk (m) |
Containers (TEUs)4 |
|||||
|
Up
to 10 |
6 |
1 |
Stow at bow or stern
furthest from living quarters and regularly occupied work areas |
Stow at stern or at platform
midpoint |
||
|
More
than 10 but not more than 20 |
8 |
1 |
as above |
as above |
||
|
More
than 20 but not more than 50 |
13 |
2 |
as above |
not applicable |
||
|
More
than 50 but not more than 100 |
18 |
3 |
as above |
not applicable |
||
|
More
than 100 but not more than 200 |
26 |
4 |
as above |
not applicable |
||
|
More
than 200 but not more than 400 |
36 |
6 |
as above |
not applicable |
||
1 General cargo, break bulk or ro-ro
containership of 150 m minimum length.
2 Ferry or cross channel, coastal and
inter-island ship of 100 m minimum length.
3 Offshore support vessel of 50 m minimum
length (in this case the practical maximum sum of TIs carried is 20).
4 TEU means “20 ft Equivalent Unit” (this is
equivalent to a standard freight container of 6 m nominal length).
7.1.5 Stowage codes
The
stowage codes given in column 16a of the Dangerous Goods List are as specified
below:
|
Stowage code |
Description |
|
SW1 |
Protected from
sources of heat. |
|
SW2 |
Clear of living
quarters. |
|
SW3 |
Shall be
transported under temperature control. |
|
SW4 |
Surface ventilation
is required to assist in removing any residual solvent vapour. |
|
SW5
|
If under deck, stow
in a mechanically ventilated space. |
|
SW6
|
When stowed under
deck, mechanical ventilation shall be in accordance with SOLAS regulation
II-2/19 (II-2/54) for flammable liquids with flashpoint below 23°C c.c. |
|
SW7
|
As approved by the
competent authorities of the countries involved in the shipment. |
|
SW8
|
Ventilation may be
required. The possible need to open hatches in case of fire to provide
maximum ventilation and to apply water in an emergency, and the consequent
risk to the stability of the ship through flooding of the cargo spaces, shall
be considered before loading. |
|
SW9
|
Provide a good
through ventilation for bagged cargo. Double strip stowage is recommended.
The illustration in 7.6.2.7.2.3 shows how this can be achieved. During the
voyage regular temperature readings shall be taken at varying depths in the
hold and recorded. If the temperature of the cargo exceeds the ambient
temperature and continues to increase, ventilation shall be closed down. |
|
SW10
|
Unless carried in
closed cargo transport units, bales shall be properly covered by tarpaulins
or the like. Cargo spaces shall be clean, dry and free from oil or grease.
Ventilator cowls leading into the cargo space shall have sparking-preventing
screens. All other openings, entrances and hatches leading to the cargo space
shall be securely closed. During temporary interruption of loading, when the
hatch remains uncovered, a fire-watch shall be kept. During loading or
discharge, smoking in the vicinity shall be prohibited and fire-fighting
appliances kept ready for immediate operation. |
|
SW11
|
Cargo transport
units shall be shaded from direct sunlight. Packages in cargo transport units
shall be stowed so as to allow for adequate air circulation throughout the
cargo. |
|
SW12
|
Taking account of
any supplementary requirements specified in the transport documents. |
|
SW13
|
Taking account of
any supplementary requirements specified in the competent authority approval
certificate(s). |
|
SW14
|
Category A only if
the special stowage provisions of 7.4.1.4 and 7.6.2.8.4 are complied with. |
|
SW15
|
For metal drums,
stowage category B. |
|
SW16
|
For unit loads in
open cargo transport units, stowage category B. |
|
SW17
|
Category E, for closed cargo transport unit and pallet boxes
only. Ventilation may be required. The possible need to open hatches in case
of fire to provide maximum ventilation and to apply water in an emergency,
and the consequent risk to the stability of the ship through flooding of the
cargo space, shall be considered before loading. |
|
SW18
|
Category A, when
transported in accordance with P650. |
|
SW19
|
For batteries transported in accordance with special provisions
376 or 377, category C, unless transported on a short international voyage. |
|
SW20
|
For uranyl nitrate
hexahydrate solution stowage, category D applies. |
|
SW21
|
For uranium metal
pyrophoric and thorium metal pyrophoric stowage, category D applies. |
|
SW22
|
For AEROSOLS with a
maximum capacity of 1 L: category A. For AEROSOLS with a
capacity above 1 L: category B. For WASTE AEROSOLS:
category C, clear of living quarters. |
|
SW23
|
When transported in
BK3 bulk container, see 7.6.2.12 and 7.7.3.9. |
|
SW24
|
For special stowage
provisions, see 7.4.1.3 and 7.6.2.7.2. |
|
SW25
|
For special stowage
provisions, see 7.6.2.7.3. |
|
SW26
|
For special stowage
provisions, see 7.4.1.4 and 7.6.2.11.1.1. |
|
SW27
|
For special stowage
provisions, see 7.6.2.7.2.1. |
|
SW28
|
As approved by the
competent authority of the country of origin. |
|
SW29 |
For engines or
machinery containing fuels with flashpoint equal or greater than 23°C,
stowage Category A. |
7.1.6 Handling codes
The handling codes
given in column 16a of the Dangerous Goods List are as specified below:
|
Handling code |
Description |
|
H1
|
Keep as dry as
reasonably practicable. |
|
H2
|
Keep as cool as
reasonably practicable. |
|
H3
|
During transport,
it should be stowed (or kept) in a cool ventilated place. |
|
H4
|
If cleaning of
cargo spaces has to be carried out at sea, the safety procedures followed and
standard of equipment used shall be at least as effective as those employed
as industry best practice in a port. Until such cleaning is undertaken, the
cargo spaces in which the asbestos has been carried shall be closed and
access to those spaces shall be prohibited. |
Chapter 7.2. General
segregation provisions
7.2.1 Introduction
This
chapter contains the general provisions for the segregation of goods which are
mutually incompatible.
Additional
segregation provisions are given in:
7.3 Consigning operations
concerning the packing and use of cargo transport units (CTUs) and related
provisions;
7.4 Stowage and segregation
on containerships;
7.5 Stowage and
segregation on roll-on/roll-off ships;
7.6 Stowage and
segregation on general cargo ships; and
7.7 Shipborne barges on
barge-carrying ships.
7.2.2 Definitions
7.2.2.1
Segregation
Segregation is
the process of separating two or more substances or articles which are
considered mutually incompatible when their packing or stowage together may
result in undue hazards in case of leakage or spillage, or any other accident.
However,
as the extent of the hazard arising may vary, the segregation arrangements
required may also vary as appropriate. Segregation is obtained by maintaining
certain distances between incompatible dangerous goods or by requiring the
presence of one or more steel bulkheads or decks between them, or a combination
thereof. Intervening spaces between such dangerous goods may be filled with
other cargo compatible with the dangerous substances or articles in question.
7.2.2.2
Segregation terms
The
following segregation terms that are used throughout this Code are defined in
other chapters of this part as they apply to packing cargo transport units and
segregation on board different ship types:
.1 “away from”;
.2 “separated from”;
.3 “separated by a
complete compartment or hold from”;
.4 “separated longitudinally
by an intervening complete compartment or hold from”.
Segregation
terms such as “away from class …” that are used in the Dangerous Goods List,
“class …” is deemed to include:
.1 all substances within
“class …”; and
.2 all substances for
which a subsidiary risk label of “class …” is required.
7.2.3 Segregation provisions
7.2.3.1 To
determine the segregation requirements between two or more dangerous goods, the
segregation provisions, including the segregation table (7.2.4) and column 16b
of the Dangerous Goods List shall be consulted, see also the annex to this
chapter. In case of conflicting provisions, the provisions of column 16b of the
Dangerous Goods List, always take precedence.
7.2.3.2
Whenever a segregation term applies (see 7.2.2.2), the goods are:
.1 not permitted to be
packed in the same outer packaging; and
.2 not permitted to be
transported in the same cargo transport unit except as provided in 7.2.6 and
7.3.4.
For
“limited quantities” and “excepted quantities” see chapters 3.4 and 3.5.
7.2.3.3
Where the provisions of this Code indicate a single secondary hazard (one
subsidiary risk label), the segregation provisions applicable to that hazard
shall take precedence where they are more stringent than those of the primary
hazard. The segregation provisions corresponding to a subsidiary risk of class
1 are those for class 1 division 1.3.
7.2.3.4 The
segregation provisions for substances, materials or articles having more than
two hazards (two or more subsidiary risk labels) are given in column 16b of the
Dangerous Goods List.
For
example:
In
the Dangerous Goods List entry for BROMINE CHLORIDE, class 2.3, UN 2901,
subsidiary risks 5.1 and 8, the following particular segregation is specified:
“segregation as for class 5.1, but “separated from” class 7”.
7.2.4 Segregation table
The
general provisions for segregation between the various classes of dangerous
goods are shown in the “segregation table” given below.
Since
the properties of substances, materials or articles within each class may vary
greatly, the Dangerous Goods List shall always be consulted for particular
provisions for segregation as, in the case of conflicting provisions, these
take precedence over the general provisions.
Segregation
shall also take account of a single subsidiary risk label.
|
CLASS |
1.1 1.2 1.5 |
1.3 1.6 |
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 |
|
|
Explosives |
1.1, 1.2, 1.5 |
* |
* |
* |
4 |
2 |
2 |
4 |
4 |
4 |
4 |
4 |
4 |
2 |
4 |
2 |
4 |
X |
|
Explosives |
1.3, 1.6 |
* |
* |
* |
4 |
2 |
2 |
4 |
3 |
3 |
4 |
4 |
4 |
2 |
4 |
2 |
2 |
X |
|
Explosives |
1.4 |
* |
* |
* |
2 |
1 |
1 |
2 |
2 |
2 |
2 |
2 |
2 |
X |
4 |
2 |
2 |
X |
|
Flammable
gases |
2.1 |
4 |
4 |
2 |
X |
X |
X |
2 |
1 |
2 |
2 |
2 |
2 |
X |
4 |
2 |
1 |
X |
|
Non-toxic,
non-flammable gases |
2.2 |
2 |
2 |
1 |
X |
X |
X |
1 |
X |
1 |
X |
X |
1 |
X |
2 |
1 |
X |
X |
|
Toxic
gases |
2.3 |
2 |
2 |
1 |
X |
X |
X |
2 |
X |
2 |
X |
X |
2 |
X |
2 |
1 |
X |
X |
|
Flammable
liquids |
3 |
4 |
4 |
2 |
2 |
1 |
2 |
X |
X |
2 |
2 |
2 |
2 |
X |
3 |
2 |
X |
X |
|
Flammable
solids (including self- reactive substances and solid desensitized
explosives) |
4.1 |
4 |
3 |
2 |
1 |
X |
X |
X |
X |
1 |
X |
1 |
2 |
X |
3 |
2 |
1 |
X |
|
Substances
liable to spontaneous combustion |
4.2 |
4 |
3 |
2 |
2 |
1 |
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 |
X |
2 |
X |
1 |
X |
2 |
2 |
X |
2 |
2 |
1 |
X |
|
Oxidizing
substances (agents) |
5.1 |
4 |
4 |
2 |
2 |
X |
X |
2 |
1 |
2 |
2 |
X |
2 |
1 |
3 |
1 |
2 |
X |
|
Organic
peroxides |
5.2 |
4 |
4 |
2 |
2 |
1 |
2 |
2 |
2 |
2 |
2 |
2 |
X |
1 |
3 |
2 |
2 |
X |
|
Toxic
substances |
6.1 |
2 |
2 |
X |
X |
X |
X |
X |
X |
1 |
X |
1 |
1 |
X |
1 |
X |
X |
X |
|
Infectious
substances |
6.2 |
4 |
4 |
4 |
4 |
2 |
2 |
3 |
3 |
3 |
2 |
3 |
3 |
1 |
X |
3 |
3 |
X |
|
Radioactive
material |
7 |
2 |
2 |
2 |
2 |
1 |
1 |
2 |
2 |
2 |
2 |
1 |
2 |
X |
3 |
X |
2 |
X |
|
Corrosive
substances |
8 |
2 |
2 |
2 |
1 |
X |
X |
X |
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 |
X |
The
numbers and symbols in the table have the following meanings:
1 – “away from”
2 – “separated from”
3 – “separated by a complete compartment or
hold from”
4 – “separated longitudinally by an intervening
complete compartment or hold from”
X – the Dangerous Goods List has to be consulted
to verify whether there are specific segregation provisions
* – see 7.2.7.1 of this chapter for the
segregation provisions between class 1 substances or articles
7.2.5
Segregation groups
7.2.5.1 For
the purpose of segregation, dangerous goods having certain similar chemical
properties have been grouped together in segregation groups as listed in
7.2.5.2. The entries allocated to these segregation groups are listed in
3.1.4.4. Where in the Dangerous Goods List entry in column 16b a particular segregation
requirement refers to a group of substances, such as “acids”, the particular
segregation requirement applies to the goods allocated to the respective
segregation group.
7.2.5.2
Segregation groups referred to in the Dangerous Goods List:
.1 acids
.2 ammonium compounds
.3 bromates
.4 chlorates
.5 chlorites
.6 cyanides
.7 heavy metals and their
salts (including their organometallic compounds)
.8 hypochlorites
.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 alkalis.
7.2.5.3 It
is recognized that not all substances, mixtures, solutions or preparations
falling within a segregation group are listed in the IMDG Code by name. These
are shipped under N.O.S. entries. Although these N.O.S. entries are not
themselves listed in the segregation groups (see 3.1.4.4), the consignor shall
decide whether inclusion under the segregation group is appropriate and, if so,
shall mention that fact in the transport document (see 5.4.1.5.11).
7.2.5.4 The
segregation groups in this Code do not cover substances which fall outside the
classification criteria of this Code. It is recognized that some non-hazardous
substances have similar chemical properties as substances listed in the
segregation groups. A consignor or the person responsible for packing the goods
into a cargo transport unit who does have knowledge of the chemical properties
of such non-dangerous goods may decide to implement the segregation
requirements of a related segregation group on a voluntary basis.
7.2.6 Special segregation provisions and exemptions
7.2.6.1
Notwithstanding 7.2.3.3 and 7.2.3.4, substances of the same class may be stowed
together without regard to segregation required by secondary hazards
(subsidiary risk label(s)), provided that the substances do not react
dangerously with each other and cause:
.1 combustion and/or
evolution of considerable heat;
.2 evolution of flammable,
toxic or asphyxiant gases;
.3 the formation of
corrosive substances; or
.4 the formation of
unstable substances.
7.2.6.2
Where the Dangerous Goods List specifies that “segregation as for class ...”
applies, the segregation provisions applicable to that class in 7.2.4 shall be
applied. However, for the purposes of interpreting 7.2.6.1, which permits
substances of the same class to be stowed together provided they do not react
dangerously with each other, the segregation provisions of the class as
represented by the primary hazard class in the Dangerous Goods List shall be
applied.
For
example:
UN 2965 – BORON TRIFLUORIDE DIMETHYL ETHERATE, class 4.3
The Dangerous Goods List entry specifies “segregation as for class
3, but “away from” classes 4.1 and 8”.
For
the purposes of establishing the segregation provisions applicable in 7.2.4,
the class 3 column shall be consulted.
This
substance may be stowed together with other class 4.3 substances where they do
not react dangerously with each other, see 7.2.6.1.
7.2.6.3 No
segregation needs to be applied:
.1 between dangerous
goods of different classes which comprise the same substance but vary only in
their water content, such as sodium sulphide in classes 4.2 and 8 or for class
7 if the difference is due to quantity only; and
.2 between dangerous
goods which belong to a group of substances of different classes but for which
scientific evidence exists that they do not react dangerously when in contact
with each other. Substances within the same table shown below are compatible
with one another.
Table
7.2.6.3.1
|
UN |
Proper shipping name |
Class |
Subsidiary risk(s) |
Packing group |
|
2014 |
HYDROGEN
PEROXIDE, AQUEOUS SOLUTION with not less than 20% but not more than 60%
hydrogen peroxide (stabilized as necessary) |
5.1 |
8 |
II |
|
2984 |
HYDROGEN
PEROXIDE, AQUEOUS SOLUTION with not less than 8% but less than 20% hydrogen
peroxide (stabilized as necessary) |
5.1 |
|
III |
|
3105 |
ORGANIC PEROXIDE TYPE D,
LIQUID (peroxyacetic acid, type D, stabilized) |
5.2 |
8 |
|
|
3107 |
ORGANIC PEROXIDE TYPE E, LIQUID
(peroxyacetic acid, type E, stabilized) |
5.2 |
8 |
|
|
3109 |
ORGANIC PEROXIDE TYPE F,
LIQUID (peroxyacetic acid, type F, stabilized) |
5.2 |
8 |
|
|
3149 |
HYDROGEN
PEROXIDE AND PEROXYACETIC ACID, MIXTURE with acid(s), water and not more than
5% peroxyacetic acid, STABILIZED |
5.1 |
8 |
II |
Table
7.2.6.3.2
|
UN |
Proper shipping name |
Class |
Subsidiary risk(s) |
Packing group |
|
1295 |
TRICHLOROSILANE |
4.3 |
3/8 |
I |
|
1818 |
SILICON
TETRACHLORIDE |
8 |
– |
II |
|
2189 |
DICHLOROSILANE |
2.3 |
2.1/8 |
– |
Table
7.2.6.3.3
|
UN |
Proper shipping name |
Class |
Subsidiary risk(s) |
Packing group |
|
3391 |
ORGANOMETALLIC
SUBSTANCE, SOLID, PYROPHORIC |
4.2 |
|
I |
|
3392 |
ORGANOMETALLIC
SUBSTANCE, LIQUID, PYROPHORIC |
4.2 |
|
I |
|
3393 |
ORGANOMETALLIC
SUBSTANCE, SOLID, PYROPHORIC, WATER-REACTIVE |
4.2 |
4.3 |
I |
|
3394 |
ORGANOMETALLIC
SUBSTANCE, LIQUID, PYROPHORIC, WATER-REACTIVE |
4.2 |
4.3 |
I |
|
3395 |
ORGANOMETALLIC
SUBSTANCE, SOLID, WATER-REACTIVE |
4.3 |
|
I, II, III |
|
3396 |
ORGANOMETALLIC
SUBSTANCE, SOLID, WATER REACTIVE, FLAMMABLE |
4.3 |
4.1 |
I, II, III |
|
3397 |
ORGANOMETALLIC
SUBSTANCE, SOLID, WATER REACTIVE, SELF-HEATING |
4.3 |
4.2 |
I, II, III |
|
3398 |
ORGANOMETALLIC
SUBSTANCE, LIQUID, WATER REACTIVE |
4.3 |
|
I, II, III |
|
3399 |
ORGANOMETALLIC
SUBSTANCE, LIQUID, WATER REACTIVE, FLAMMABLE |
4.3 |
3 |
I, II, III |
|
3400 |
ORGANOMETALLIC
SUBSTANCE, SOLID , SELF-HEATING |
4.2 |
|
II, III |
7.2.6.4
Notwithstanding the provisions of 7.2.5, substances of class 8, packing group
II or III, that would otherwise be required to be segregated from one another
due to the provisions pertaining to segregation groups as identified by an
entry in column 16b of the Dangerous Goods List indicating “away from” or
“separated from” “acids” or “away from” or “separated from” “alkalis”, may be
transported in the same cargo transport unit, whether in the same packaging or
not, provided:
.1 the substances comply
with the provisions of 7.2.6.1;
.2 the package does not
contain more than 30 L for liquids or 30 kg for solids;
.3 the transport document
includes the statement required by 5.4.1.5.11.3; and
.4 a copy of the test
report that verifies that the substances do not react dangerously with each
other shall be provided if requested by the competent authority.
7.2.7 Segregation of goods of class 1
7.2.7.1
Segregation between goods of class 1
7.2.7.1.1
Goods of class 1 may be stowed within the same compartment or hold, or closed
cargo transport unit as indicated in 7.2.7.1.4. In other cases, they shall be
stowed in separate compartments or holds, or closed cargo transport units.
7.2.7.1.2
When goods requiring different stowage arrangements are permitted by 7.2.7.1.4
to be transported in the same compartment or hold, or closed cargo transport
unit, the appropriate stowage arrangement shall conform to the most stringent
provisions for the entire load.
7.2.7.1.3
Where a mixed load of different divisions is transported within the same
compartment or hold, or closed cargo transport unit, the entire load shall be
treated as if belonging to the hazard division in the order 1.1 (most
dangerous), 1.5, 1.2, 1.3, 1.6 and 1.4 (least dangerous) and the stowage
arrangement shall conform to the most stringent provisions for the entire load.
7.2.7.1.4 Permitted mixed stowage for
goods of class 1
|
Compatibility group |
A |
B |
C |
D |
E |
F |
G |
H |
J |
K |
L |
N |
S |
|
A |
X |
|
|
|
|
|
|
|
|
|
|
|
|
|
B |
|
X |
|
|
|
|
|
|
|
|
|
|
X |
|
C |
|
|
X |
X6 |
X6 |
|
X1 |
|
|
|
|
X4 |
X |
|
D |
|
|
X6 |
X |
X6 |
|
X1 |
|
|
|
|
X4 |
X |
|
E |
|
|
X6 |
X6 |
X |
|
X1 |
|
|
|
|
X4 |
X |
|
F |
|
|
|
|
|
X |
|
|
|
|
|
|
X |
|
G |
|
|
X1 |
X1 |
X1 |
|
X |
|
|
|
|
|
X |
|
H |
|
|
|
|
|
|
|
X |
|
|
|
|
X |
|
J |
|
|
|
|
|
|
|
|
X |
|
|
|
X |
|
K |
|
|
|
|
|
|
|
|
|
X |
|
|
X |
|
L |
|
|
|
|
|
|
|
|
|
|
X2 |
|
|
|
N |
|
|
X4 |
X4 |
X4 |
|
|
|
|
|
|
X3 |
X5 |
|
S |
|
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X5 |
X |
“X”
indicates that goods of the corresponding compatibility groups may be stowed in
the same compartment, hold, or closed cargo transport unit.
Notes
1 Explosive articles in compatibility group G
(other than fireworks and those requiring special stowage) may be stowed with
explosive articles of compatibility groups C, D and E provided no explosive
substances are transported in the same compartment or hold, or closed cargo
transport unit.
2 A consignment of one type in compatibility
group L shall only be stowed with a consignment of the same type within
compatibility group L.
3 Different types of articles of Division 1.6,
compatibility group N, may only be transported together when it is proven that
there is no additional risk of sympathetic detonation between the articles.
Otherwise they shall be treated as division 1.1.
4 When articles of compatibility group N are
transported with articles or substances of compatibility groups C, D or E, the
goods of compatibility group N shall be treated as compatibility group D.
5 When articles of compatibility group N are
transported together with articles or substances of compatibility group S, the
entire load shall be treated as compatibility group N.
6 Any combination of articles in compatibility
groups C, D and E shall be treated as compatibility group E. Any combination of
substances in compatibility groups C and D shall be treated as the most
appropriate compatibility group shown in 2.1.2.3, taking into account the
predominant characteristics of the combined load. This overall classification
code shall be displayed on any label or placard placed on a unit load or closed
cargo transport unit as prescribed in 5.2.2.2.2.
7.2.7.1.5
Closed cargo transport units carrying different goods of class 1 do not require
segregation from each other provided 7.2.7.1.4 authorizes the goods to be
transported together. Where this is not permitted, closed cargo transport unit
shall be “separated from” one another.
7.2.7.2
Segregation from goods of other classes
7.2.7.2.1
Notwithstanding the segregation provisions of this chapter,
AMMONIUM NITRATE (UN 1942), AMMONIUM NITRATE FERTILIZERS (UN 2067), alkali
metal nitrates (e.g. UN 1486) and alkaline earth metal nitrates (e.g. UN 1454)
may be stowed together with blasting explosives (except EXPLOSIVE, BLASTING,
TYPE C, UN 0083) provided the aggregate is treated as blasting explosives under
class 1.
Note:
Alkali metal nitrates include caesium nitrate (UN 1451), lithium nitrate (UN
2722), potassium nitrate (UN 1486), rubidium nitrate (UN 1477) and sodium
nitrate (UN 1498). Alkaline earth metal nitrates include barium nitrate (UN
1446), beryllium nitrate (UN 2464), calcium nitrate (UN 1454), magnesium
nitrate (UN 1474) and strontium nitrate (UN 1507).
7.2.8 Segregation codes
The
segregation codes given in column 16b of the Dangerous Goods List are as
specified below:
|
Segregation code |
Description |
|
SG1 |
For packages carrying a subsidiary risk label of class 1,
segregation as for class 1, division 1.3. |
|
SG2 |
Segregation as for class 1.2G. |
|
SG3 |
Segregation as for class 1.3G. |
|
SG4 |
Segregation as for class 2.1. |
|
SG5 |
Segregation as for class 3. |
|
SG6 |
Segregation as for class 5.1. |
|
SG7 |
Stow “away from” class 3. |
|
SG8 |
Stow “away from” class 4.1. |
|
SG9 |
Stow “away from” class 4.3. |
|
SG10 |
Stow “away from” class 5.1. |
|
SG11 |
Stow “away from” class 6.2. |
|
SG12 |
Stow “away from” class 7. |
|
SG13 |
Stow “away from” class 8. |
|
SG14 |
Stow “separated from” class 1 except for division 1.4S. |
|
SG15 |
Stow “separated from” class 3. |
|
SG16 |
Stow “separated from” class 4.1. |
|
SG17 |
Stow “separated from” class 5.1. |
|
SG18 |
Stow “separated from” class 6.2. |
|
SG19 |
Stow “separated from” class 7. |
|
SG20 |
Stow “away from” acids. |
|
SG21 |
Stow “away from” alkalis. |
|
SG22 |
Stow “away from” ammonium salts. |
|
SG23 |
Stow “away from” animal or vegetable oils. |
|
SG24 |
Stow “away from” azides. |
|
SG25 |
Stow “separated from” goods of classes 2.1 and 3. |
|
SG26 |
In addition: from goods of classes 2.1 and 3 when stowed on deck
of a containership a minimum distance of two container spaces athwartship
shall be maintained, when stowed on ro-ro ships a distance of 6 m athwartship
shall be maintained. |
|
SG27 |
Stow “away from” explosives containing chlorates or
perchlorates. |
|
SG28 |
Stow “away from” ammonium compounds and explosives containing
ammonium compounds or salts. |
|
SG29 |
Segregation from foodstuffs as in 7.3.4.2.2, 7.6.3.1.2 or
7.7.3.7. |
|
SG30 |
Stow “away from” heavy metals and their salts. |
|
SG31 |
Stow “away from” lead and its compounds. |
|
SG32 |
Stow “away from” liquid halogenated hydrocarbons. |
|
SG33 |
Stow “away from” powdered metals. |
|
SG34 |
When containing ammonium compounds, “away from” chlorates or perchlorates
and explosives containing chlorates or perchlorates. |
|
SG35 |
Stow “separated from” acids. |
|
SG36 |
Stow “separated from” alkalis. |
|
SG37 |
Stow “separated from” ammonia. |
|
SG38 |
Stow “separated from” ammonium compounds. |
|
SG39 |
Stow “separated from” ammonium compounds other than AMMONIUM
PERSULPHATE (UN 1444). |
|
SG40 |
Stow “separated from” ammonium compounds other than mixtures of
ammonium persulphates and/or potassium persulphates and/or sodium
persulphates. |
|
SG41 |
Stow “separated from” animal or vegetable oil. |