Regulation 19. Carriage of dangerous goods
1 Purpose
The purpose of this regulation is to provide additional safety measures in order to
address the fire safety objectives of this chapter for ships carrying dangerous goods.
For this purpose, the following functional requirements shall be met:
-
.1 fire protection systems shall be provided to protect the ship from the added fire
hazards associated with carriage of dangerous goods;
-
.2 dangerous goods shall be adequately separated from ignition sources; and
-
.3 appropriate personnel protective equipment shall be provided for the hazards associated
with the carriage of dangerous goods.
2. General requirements
2.1 In addition to complying with the requirements of regulations in parts B, C, D, E and Regulations 18 and 20 , as appropriate, ship types and cargo spaces, referred to in paragraph 2.2, intended
for the carriage of dangerous goods shall comply with the requirements of this Regulation,
as appropriate, except when carrying dangerous goods in limited quantities and excepted
quantities unless such requirements have already been met by compliance with the requirements
elsewhere in this chapter. The types of ships and modes of carriage of dangerous goods
are referred to in paragraph 2.2 and in table 19.1. Cargo ships of less than 500 gross
tonnage shall comply with this regulation, but Administrations may reduce the requirements
and such reduced requirements shall be recorded in the document of compliance referred
to in paragraph 4.
2.2 The following ship types and cargo spaces shall govern the application of tables
19.1 and 19.2:
-
.1 ships and cargo spaces not specifically designed for the carriage of freight containers,
but intended for the carriage of dangerous goods in packaged form including goods
in freight containers and portable tanks;
-
.2 purpose-built container ships and cargo spaces intended for the carriage of dangerous
goods in freight containers and portable tanks;
-
.3 ro-ro ships and ro-ro spaces intended for the carriage of dangerous goods;
-
.4 ships and cargo spaces intended for the carriage of solid dangerous goods in bulk;
and
-
.5 ships and cargo spaces intended for carriage of dangerous goods other than liquids
and gases in bulk in shipborne barges.
3 Special requirements
Unless otherwise specified, the following requirements shall govern the application
of tables 19.1, 19.2 and 19.3 to both “on-deck” and “under-deck” stowage of dangerous
goods where the numbers of the following paragraphs are indicated in the first column
of the tables.
3.1 Water supplies
3.1.1 Arrangements shall be made to ensure immediate availability of a supply of water
from the fire main at the required pressure either by permanent pressurization or
by suitably placed remote arrangements for the fire pumps.
3.1.2 The quantity of water delivered shall be capable of supplying four nozzles of
a size and at pressures as specified in regulation 10.2, capable of being trained on any part of the cargo space when empty. This amount
of water may be applied by equivalent means to the satisfaction of the Administration.
3.1.3 Means shall be provided for effectively cooling the designated underdeck cargo
space by at least 5 l/min per square metre of the horizontal area of cargo spaces,
either by a fixed arrangement of spraying nozzles or flooding the cargo space with
water. Hoses may be used for this purpose in small cargo spaces and in small areas
of larger cargo spaces at the discretion of the Administration. However, the drainage
and pumping arrangements shall be such as to prevent the build-up of free surfaces.
The drainage system shall be sized to remove no less than 125% of the combined capacity
of both the water spraying system pumps and the required number of fire hose nozzles.
The drainage system valves shall be operable from outside the protected space at a
position in the vicinity of the extinguishing system controls. Bilge wells shall be
of sufficient holding capacity and shall be arranged at the side shell of the ship
at a distance from each other of not more than 40 m in each watertight compartment.
If this is not possible, the adverse effect upon stability of the added weight and
free surface of water shall be taken into account to the extent deemed necessary by
the Administration in its approval of the stability information.
3.1.4 Provision to flood a designated under-deck cargo space with suitable specified
media may be substituted for the requirements in paragraph 3.1.3.
3.1.5 The total required capacity of the water supply shall satisfy paragraphs 3.1.2
and 3.1.3, if applicable, simultaneously calculated for the largest designated cargo
space. The capacity requirements of paragraph 3.1.2 shall be met by the total capacity
of the main fire pump(s) not including the capacity of the emergency fire pump, if
fitted. If a drencher system is used to satisfy paragraph 3.1.3, the drencher pump
shall also be taken into account in this total capacity calculation.
3.2 Sources of ignition
Electrical equipment and wiring shall not be fitted in enclosed cargo spaces or vehicle
spaces unless it is essential for operational purposes in the opinion of the Administration.
However, if electrical equipment is fitted in such spaces, it shall be of a certified
safe type for use in the dangerous environments to which it may be exposed unless
it is possible to completely isolate the electrical system (e.g. by removal of links
in the system, other than fuses). Cable penetrations of the decks and bulkheads shall
be sealed against the passage of gas or vapour. Through runs of cables and cables
within the cargo spaces shall be protected against damage from impact. Any other equipment
which may constitute a source of ignition of flammable vapour shall not be permitted.
3.3 Detection system
Ro-ro spaces shall be fitted with a fixed fire detection and fire alarm system complying
with the requirements of the Fire Safety Systems Code. All other types of cargo spaces
shall be fitted with either a fixed fire detection and fire alarm system or a sample
extraction smoke detection system complying with the requirements of the Fire Safety
Systems Code. If a sample extraction smoke detection system is fitted, particular
attention shall be made to paragraph 2.1.3 in chapter 10 of the Fire Safety Systems
Code in order to prevent the leakage of toxic fumes into occupied areas.
3.4 Ventilation arrangement
3.4.1 Adequate power ventilation shall be provided in enclosed cargo spaces. The arrangement
shall be such as to provide for at least six air changes per hour in the cargo space
based on an empty cargo space and for removal of vapours from the upper or lower parts
of the cargo space, as appropriate.
3.4.2 The fans shall be such as to avoid the possibility of ignition of flammable
gas air mixtures. Suitable wire mesh guards shall be fitted over inlet and outlet
ventilation openings.
3.4.3 Natural ventilation shall be provided in enclosed cargo spaces intended for
the carriage of solid dangerous goods in bulk, where there is no provision for mechanical
ventilation.
3.5 Bilge pumping
3.5.1 Where it is intended to carry flammable or toxic liquids in enclosed cargo spaces,
the bilge pumping system shall be designed to protect against inadvertent pumping
of such liquids through machinery space piping or pumps. Where large quantities of
such liquids are carried, consideration shall be given to the provision of additional
means of draining those cargo spaces.
3.5.2 If the bilge drainage system is additional to the system served by pumps in
the machinery space, the capacity of the system shall be not less than 10 m3/h per cargo space served. If the additional system is common, the capacity need not
exceed 25 m3/h. The additional bilge system need not be arranged with redundancy.
3.5.3 Whenever flammable or toxic liquids are carried, the bilge line into the machinery
space shall be isolated either by fitting a blank flange or by a closed lockable valve.
3.5.4 Enclosed spaces outside machinery spaces containing bilge pumps serving cargo
spaces intended for carriage of flammable or toxic liquids should be fitted with separate
mechanical ventilation giving at least 6 air changes per hour. If the space has access
from another enclosed space, the door shall be self-closing.
3.5.5 If bilge drainage of cargo spaces is arranged by gravity drainage, the drainage
shall be either led directly overboard or to a closed drain tank located outside the
machinery spaces. The tank shall be provided with a vent pipe to a safe location on
the open deck. Drainage from a cargo space into bilge wells in a lower space is only
permitted if that space satisfies the same requirements as the cargo space above.
3.6 Personnel protection
3.6.1 Four sets of full protective clothing resistant to chemical attack shall be
provided in addition to the fire-fighter's outfits required by regulation 10.10 and shall be selected taking into account the hazards associated with the chemicals
being transported and the standards developed by the Organization according to the
class and physical state. The protective clothing shall cover all skin, so that no
part of the body is unprotected.
3.6.2 At least two self-contained breathing apparatuses additional to those required
by Regulation 10 shall be provided. Two spare charges suitable for use with the breathing apparatus
shall be provided for each required apparatus. Passenger ships carrying not more than
36 passengers and cargo ships that are equipped with suitably located means for fully
recharging the air cylinders free from contamination, need carry only one spare charge
for each required apparatus.
3.7 Portable fire extinguishers
Portable fire extinguishers with a total capacity of at least 12 kg of dry powder
or equivalent shall be provided for the cargo spaces. These extinguishers shall be
in addition to any portable fire extinguishers required elsewhere in this chapter.
3.8 Insulation of machinery space boundaries
Bulkheads forming boundaries between cargo spaces and machinery spaces of category
A shall be insulated to “A-60” class standard, unless the dangerous goods are stowed
at least 3 m horizontally away from such bulkheads. Other boundaries between such
spaces shall be insulated to “A-60” class standard.
3.9 Water spray system
Each open ro-ro space having a deck above it and each space deemed to be a closed
ro-ro space not capable of being sealed, shall be fitted with an approved fixed pressure
water-spraying system for manual operation which shall protect all parts of any deck
and vehicle platform in the space, except that the Administration may permit the use
of any other fixed fire-extinguishing system that has been shown by full-scale test
to be no less effective. However, the drainage and pumping arrangements shall be such
as to prevent the build-up of free surfaces. The drainage system shall be sized to
remove no less than 125% of the combined capacity of both the water spraying system
pumps and the required number of fire hose nozzles. The drainage system valves shall
be operable from outside the protected space at a position in the vicinity of the
extinguishing system controls. Bilge wells shall be of sufficient holding capacity
and shall be arranged at the side shell of the ship at a distance from each other
of not more than 40 m in each watertight compartment. If this is not possible the
adverse effect upon stability of the added weight and free surface of water shall
be taken into account to the extent deemed necessary by the Administration in its
approval of the stability information.
3.10 Separation of ro-ro spaces
3.10.1 In ships having ro-ro spaces, a separation shall be provided between a closed
ro-ro space and an adjacent open ro-ro space. The separation shall be such as to minimize
the passage of dangerous vapours and liquids between such spaces. Alternatively, such
separation need not be provided if the ro-ro space is considered to be a closed cargo
space over its entire length and shall fully comply with the relevant special requirements
of this Regulation.
3.10.2 In ships having ro-ro spaces, a separation shall be provided between a closed
ro-ro space and the adjacent weather deck. The separation shall be such as to minimize
the passage of dangerous vapours and liquids between such spaces. Alternatively, a
separation need not be provided if the arrangements of the closed ro-ro spaces are
in accordance with those required for the dangerous goods carried on adjacent weather
deck.
4 Document of compliance
The Administration shall provide the ship with an appropriate document as evidence
of compliance of construction and equipment with the requirements of this regulation.
Certification for dangerous goods, except solid dangerous goods in bulk, is not required
for those cargoes specified as class 6.2 and 7 and dangerous goods in limited quantities
and excepted quantities.
Table 19.1 – Application of the requirements to different modes of carriage of dangerous
goods in ships and cargo spaces
Where X appears in table 19.1 it means this requirement is applicable to all classes
of dangerous goods as given in the appropriate line of table 19.3, except as indicated
by the notes.
Regulation 19.2.2
|
|
.1
|
.2
|
.3
|
.4
|
.5
|
Regulation 19
|
Weather decks .1 to .5 inclusive
|
Not specially designed
|
Container cargo spaces
|
Closed ro-ro spaces5
|
Open ro-ro spaces
|
Solid dangerous goods in bulk
|
Shipborne barges
|
3.1.1
|
X
|
X
|
X
|
X
|
X
|
For application of requirements of regulation 19 to different classes of dangerous
goods, see table 19.2.
|
X
|
3.1.2
|
X
|
X
|
X
|
X
|
X
|
–
|
3.1.3
|
–
|
X
|
X
|
X
|
X
|
X
|
3.1.4
|
–
|
X
|
X
|
X
|
X
|
X
|
3.1.5
|
–
|
X
|
X
|
X
|
X
|
X4
|
3.3
|
–
|
X
|
X
|
X
|
–
|
X4
|
3.4.1
|
–
|
X
|
X1
|
X
|
–
|
X4
|
3.4.2
|
–
|
X
|
X1
|
X
|
–
|
X4
|
3.5
|
–
|
–
|
X
|
X
|
–
|
–
|
3.5.1
|
X
|
X
|
X
|
X
|
X
|
–
|
3.6.2
|
X
|
X
|
X
|
X
|
X
|
–
|
3.7
|
X
|
X
|
–
|
–
|
X
|
|
3.8
|
X
|
X
|
X2
|
X
|
X
|
–
|
3.9
|
–
|
–
|
–
|
X3
|
X
|
|
3.10.1
|
–
|
–
|
–
|
X
|
–
|
–
|
3.10.2
|
–
|
–
|
–
|
X
|
–
|
–
|
Notes
1 For classes 4 and 5.1 solids not applicable to closed freight containers. For classes
2, 3, 6.1 and 8 when carried in closed freight containers, the ventilation rate may
be reduced to not less than two air changes per hour. For classes 4 and 5.1 liquids
when carried in closed freight containers, the ventilation rate may be reduced to
not less than two air changes per hour. For the purpose of this requirement, a portable
tank is a closed freight container.
2 Applicable to decks only.
3 Applies only to closed ro-ro spaces, not capable of being sealed.
4 In the special case where the barges are capable of containing flammable vapours
or alternatively if they are capable of discharging flammable vapours to a safe space
outside the barge carrier compartment by means of ventilation ducts connected to the
barges, these requirements may be reduced or waived to the satisfaction of the Administration.
5 Special category spaces shall be treated as closed ro-ro spaces when dangerous goods
are carried.
Table 19.2 - Application of the requirements to different classes of dangerous goods
for ships and cargo spaces carrying solid dangerous goods in bulk
Class
|
4.1
|
4.2
|
4.36
|
5.1
|
6.1
|
8
|
9
|
Regulation 19
|
|
|
|
|
|
|
|
3.1.1
|
X
|
X
|
–
|
X
|
–
|
–
|
X
|
3.1.2
|
X
|
X
|
–
|
X
|
–
|
–
|
X
|
3.2
|
X
|
X7
|
X
|
X8
|
–
|
–
|
X8
|
3.4.1
|
–
|
X7
|
X
|
–
|
–
|
–
|
–
|
3.4.2
|
X9
|
X7
|
X
|
X7,9
|
–
|
–
|
X7,9
|
3.4.3
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
3.6
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
3.8
|
X
|
X
|
X
|
X7
|
–
|
–
|
X10
|
Notes:
6 The hazards of substances in this class which may be carried in bulk are such that
special consideration shall be given by the Administration to the construction and
equipment of the ship involved in addition to meeting the requirements enumerated
in this table.
7 Only applicable to Seedcake containing solvent extractions, to Ammonium nitrate and
to Ammonium nitrate fertilizers.
8 Only applicable to Ammonium nitrate and to Ammonium nitrate fertilizers. However,
a degree of protection in accordance with standards contained in the International
Electrotechnical Commission publication 60079, Electrical Apparatus for Explosive
Gas Atmospheres, is sufficient.
9 Only suitable wire mesh guards are required.
10 The requirements of the International Maritime Solid Bulk Cargoes (IMSBC) Code, as
amended, are sufficient.
11 When “mechanically-ventilated spaces” are required by the IMDG Code.
12 Stow 3 m horizontally away from the machinery space boundaries in all cases.
13 Refer to the IMDG Code.
14 As appropriate for the goods to be carried.
15 FP means flashpoint.
16 Under the provisions of the IMDG Code, stowage of class 5.2 dangerous goods under
deck or in enclosed ro-ro spaces is prohibited.
17 Only applicable to dangerous goods evolving flammable vapour listed in the IMDG Code.
18 Only applicable to dangerous goods having a flashpoint less than 23ºC listed in the
IMDG Code.
19 Only applicable to dangerous goods having a subsidiary risk class 6.1.
20 Under the provisions of the IMDG Code, stowage of class 2.3 having subsidiary risk
class 2.1 under deck or in enclosed ro-ro spaces is prohibited.
21 Under the provisions of the IMDG Code, stowage of class 4.3 liquids having a flashpoint
less than 23ºC under deck or in enclosed ro-ro spaces is prohibited.