1. General
1.1. The use of a fire-extinguishing medium
which, in the opinion of the Head of the Shipping Inspectorate, either
by itself, or under expected conditions of use gives off toxic gases in
such quantities as to endanger persons shall not be permitted on board.
1.2. The necessary pipes for conveying
fire-extinguishing medium into protected spaces shall be provided with
control valves so marked as to indicate clearly the spaces to which the
pipes are led. Suitable provision shall be made to prevent inadvertent
admission of the medium to any space.
1.3. The
piping for the distribution of the fire-extinguishing medium shall be
arranged and discharge nozzles shall be so positioned that a uniform
distribution of medium is obtained.
1.4. Means
shall be provided to close all openings which may admit air to, or allow
gas to escape from, a protected space.
1.5.
Where the volume of free air contained in air receivers in any space is
such that, if released in such space in the event of fire, such release
of air within that space would seriously affect the efficiency of the
fixed fire-extinguishing system, the Head of the Shipping Inspectorate
shall require the provision of an additional quantity of
fire-extinguishing medium.
1.6. Means shall be
provided for automatically giving audible warning of the release of
fire-extinguishing medium in any space in which personnel normally work
or to which they have access. This alarm shall operate in time before
the fire-extinguishing medium is released.
1.7. The means of control of any such fixed gas
fire-extinguishing system shall be readily accessible and easy to
handle. They shall be grouped together in as few locations as possible
at positions not likely to be cut off by a fire in a protected space. At
each location there shall be clear instructions relating to the
operation of the system having regard to the safety of personnel.
1.8. Automatic release of fire-extinguishing
medium shall not be permitted, except as permitted by the provisions in
paragraph 2.3.5, as well as in the event of local, automatically
operating units as referred to in the paragraphs 2.4 and 2.5.
1.9. Where the quantity of extinguishing
medium is required to protect more than one space, the quantity of
medium available need not be more than the largest quantity required for
any one space so protected.
1.10. Subject to
the provisions in the paragraphs 2.3, 2.4 and 2.5, pressure containers
required for the storage of fire-extinguishing medium other than steam,
shall be located outside protected spaces in accordance with paragraph
1.13.
1.11. Means shall be provided for the
crew to safely check the quantity of medium in the containers.
1.12 Containers for the storage of
fire-extinguishing medium and associated pressure components shall
comply with the rules of the relevant classification society or with the
requirements of the Steam Vessel Inspectorate.
1.13. Where the fire-extinguishing medium is stored outside a
protected space, it shall be stored in a room which in the opinion of
the Head of the Shipping Inspectorate is located in a safe and readily
accessible place. The room as referred to shall be capable of adequate
ventilation to the satisfaction of the Head of the Shipping
Inspectorate. Any access to such a storage room shall preferably be from
the open deck and in any case independent of the protected spaces.
Access doors shall open outwards,and bulkheads and decks, including
doors and other means of closing any opening therein, which form the
boundaries between such rooms and adjacent enclosed spaces, shall be
gastight. The fire resistance of the storage room for fire-extinguishing
medium shall, in case of tankers, comply with the provisions in Article
58 and, in case of other small vessels, with the provisions in Article
70. For the purpose of the application of tables for fire resistance,
related to Article 58, storage rooms for extinguishing medium shall be
treated as fire control stations;
1.14. Spare
parts for the system shall be available on board in a sufficient type
and number in the opinion of the Head of the Shipping Inspectorate.
1.15. Apart from that, a fixed gas
fire-extinguishing system shall comply with more specific rules laid
down by the Head of the Shipping Inspectorate.
2.Carbon dioxide systems
2.1. For machinery spaces the quantity of
carbon dioxide carried, if carbon dioxide is used as fire-extinguishing
medium, shall be sufficient to give a minimum volume of free gas equal
to the larger of the following volumes, either:
- 35% of
the gross volume of the largest machinery space so protected,
the volume to exclude that part of the casing above the level at
which the horizontal area of the casing is 40% or less of the
horizontal area of the space concerned, taken midway between the
tank top and the lowest part of the casing, or
- 30% of
the gross volume of the largest machinery space protected,
including the casing.
When two or more machinery
spaces have not completely been separated from each other, these spaces
together should be considered as one department.
2.2. For the purpose of this paragraph the volume of carbon
dioxide shall be calculated at 0.56 m3/kg.
2.3. For machinery spaces the fixed piping system shall be such
that 85% of the prescribed volume of gas can be discharged into the
space within 2 minutes.
2.4 Carbon dioxide
systems intalled on or after 1 October 1994 shall comply with the
following requirements:
2.4.1 Two separate controls shall be
provided for releasing carbon dioxide into a protected space an to
ensure the activation of the alarm, as referred to in subparagraph 1.6.
One control shall be used for opening the valve of the piping which
conveys the gas into the protected space and a second control shall be
used to discharge the gas from its storage containers;
2.4.2 The two controls shall be located inside a release box clearly
identified for the particular space. If the box containing the controls
is to be locked, a key to the box shall be in a break-glass-type
enclosure conspicuously located adjacent to the box.
3.Fire-extinguishing systems using halogenised hydrocarbons
3.1 The use of the halogenised hydrocarbons
halon 1301 and halon 1211 as fire-extinguishing medium in fixed
fire-extinguishing systems is only permitted:
- in
machinery spaces and pumprooms; and
- when those systems
have been fitted before 1 October 1994.
3.2. Where halogenised hydrocarbons are used as
fire-extinguishing medium in fixed systems by which the required amount
of medium is delivered soon in the protected space:
3.2.1. the
system shall in any case be so designed as to be put into operation by a
deliberate act, whereas using provisions to automatically put the system
into operation are only permitted when the ship is unmanned;
3.2.2. when the available amount of halogenised
hydrocarbon has been intended for more than one space, the provisions
for storage and discharge shall be such that the provisions in paragraph
3.2.9 have been complied with;
3.2.3. means shall be
provided for automatically shutting down all ventilators which serve the
protected space prior to discharge of the fire-extinguishing medium;
3.2.4. means shall be provided for manually closing
all fire valves in the ventilation system which serves the protected
space;
3.2.5. the discharge provisions shall be
designed such that the minimum amount of medium required for machinery
spaces pursuant to paragraph 3.2.9 can almost completely be discharged
within a time of 20 seconds or less, all this based on discharging in
the liquid phase;
3.2.6. the system shall be designed
such that it is capable of functioning in a temperature range between
0°C and 60°C;
3.2.7. the positioning of the discharge
outlets shall be such that the discharge of the medium poses no danger
to the personnel involved in maintenance activities or while using the
regular access ladders or stairways and escape routes serving the space;
3.2.8. means shall be provided for the crew to
safely check the pressure in the pressure containers;
3.2.9. the amount of fire-extinguishing medium for machinery spaces
and pumprooms shall be calculated in accordance with table 66.1. This
amount shall be based on the gross volume of the space in connection
with the minimum concentration and on the net volume of the space in
connection with the maximum concentration, in both cases including the
shaft. The amount shall be calculated on the basis of volume ratios;
Table 66.1
Halon | Minimum | Maximum |
1301 | 4.25 percent | 7 percent |
1211 | 4.25 percent | 5.5
percent |
3.2.10. for the purpose of paragraph 3.2.9, for
the volume of Halon 1301 shall be calculated 0.16 m3/kg and for the
volume of Halon 1211 shall be calculated 0.14 m3/kg. 3.3. Only
for machinery spaces which are protected by the installation, the
fire-extinguishing medium may be stored in such spaces; in similar cases
only Halon 1301 shall be used. The individual pressure containers shall
be so positioned as to protect the entire space efficiently while the
following requirements are also complied with:
3.3.1. a manually
controllable activating unit for discharging the fire-extinguishing
medium shall be fitted outside the protected space. There shall be two
separate sources of power for this activating unit, one of which shall
be located outside the protected space. Both sources of power shall be
ready for immediate use;
3.3.2. in case of electrical
activating units the electrical lines which have been connected to the
pressure containers, shall be guarded against error conditions and
against breaking down of the sources of power.
Visual
and audible alarms have to indicate these situations;
3.3.3. in case of pneumatic or hydraulic activating units, the lines
which transfer the pressure shall be designed twice. The sources for
pneumatic or hydraulic pressure shall be guarded against loss of
pressure.
Visual and audible alarms have to indicate
this loss of pressure;
3.3.4. witihin the protected
space electrical lines, necessary for starting the installation, shall
be heat-resistant, such as cables with mineral insulation or cables
which are equivalent in the opinion of the Head of the Shipping
Inspectorate.
Hydraulic or pneumatic line systems,
necessary for starting the installation, shall be of steel or of
another, in the opinion of the Head of the Head of the Shipping
Inspectorate, equivalent, as regards heat-resistance, material;
3.3.5. each pressure container shall be provided with
an automatically operating overpressure protection which, when the
pressure container is exposed to the effect of a fire and the
installation has not been put into operation, lets the contents of the
container flood safely into the protected space;
3.3.6. the positioning of the pressure containers and the construction
of the electrical lines or hydraulic or pneumatic pipe lines, necessary
for starting the installation, shall be such that in the case of damage
to any such electrical line or hydraulic or pneumatic pipe line due to a
fire or an explosion in the protected space, where a simple error is
assumed, at least two thirds of the amount of medium, which is required
for that space in accordance with paragraph 3.2.9, still can be admitted
with due regard for the provisions regarding the uniform distribution of
the fire-extinguishing medium over the entire space. The design of
installations for spaces for which only one or two pressure containers
are required, shall be to the satisfaction of the Head of the Shipping
Inspectorate;
3.3.7. each pressure container shall not
be provided with more than two discharge outlets. The maximum amount of
extinguishing medium in each pressure container shall be such that due
regard has been given to the demand with respect to a uniform
distribution of the medium over the entire protected space, to the
satisfaction of the Head of the Shipping Inspectorate.
The amount of extinguishing medium in each pressure container shall,
however, not exceed 100 kg;
3.3.8. the pressure
containers shall be guarded against loss of pressure due to leakage or
discharge.
Visual and audible alarms for indication of
this condition shall be provided on the navigating bridge. 3.4.
Local, fixed automatic fire-extinguishing units with Halon 1301 and 1211
as medium, which have been fitted in enclosed spaces with a high fire
risk within machinery spaces, may be accepted in addition to and
independent of any required fixed fire-extinguishing system, provided
the following requirements have been complied with:
3.4.1. the
space in which such an additional local protection has been fitted,
shall preferably be located at only one working level, which level is
the same as that of the entrance. The Head of the Shipping Inspectorate
may accept location at more than one level, provided that an entrance
has been provided at each level;
3.4.2. the dimensions
of the space and the location of its entrances and the machinery placed
in it shall be such that the space can be left within 10 seconds;
3.4.3. the starting of each similar unit shall be
reported visually as well as audibly at the outside of each entrance to
the machinery space, as well as on the navigation bridge or in the space
in which the fire detection devices and the control devices for fire
fighting have been assembled;
3.4.4. at the outside of
each entrance to a space containing one or more automatic fire fighting
units, a warning sign shall be fitted which indicates that such units
are in the space as well as the nature of the medium;
3.4.5. discharge outlets shall be positioned such that the discharge
of the medium poses no danger to the personnel while using the regular
entrance ladders or stairways and escape routes which serve the space.
Besides, provisions shall be made to protect the personnel during
maintenance activities against unintended discharge of the medium;
3.4.6. the fire-extinguishing units shall generally be
designed to be capable of working at temperatures between 0°C and 60°C
unless, in the opinion of the Head of the Shipping Inspectorate, the
nature of the space involved requires to choose another temperature
range;
3.4.7. provisions shall be made for the crew to
safely check the pressure in the pressure containers;
3.4.8. the total amount of medium in the local, automatic units shall
be such that a concentration of 7 percent as regards Halon 1301 and 5.5
percent as regards Halon 1211, at 20°C, based on the net volume of the
enclosed space, shall not be exceeded. This requirement is applicable
when either a local, automatic unit, or a fixed fire-extinguishing
system has started in accordance with paragraph 3.2, but not when both
have been started. For the volume of Halon 1301 shall be calculated 0.16
m3/kg and for the volume of Halon 1211 shall be calculated 0.14 m3/kg;
3.4.9. the discharge time of such a unit, based on
the discharge in the liquid phase, shall not exceed 10 seconds;
3.4.10. the design of local, automatic
fire-extinguishing units shall be such that the discharge of the medium
does not result in the loss of electrical power or reduction of the
manoeuvrability of the ship.
3.5. Automatic fire-extinguishing units as specified in
paragraph 3.4, fitted in machinery spaces above equipment with a high
fire risk, in addition to and independent of any required, fixed
fire-extinguishing system, may be permitted, provided that they comply
with the paragraphs 3.4.3 through 3.4.7, 3.4.9 and 3.4.10 as well as
with the following provisions:
3.5.1. the amount of medium, present
in local, automatic fire-extinguishing units shall be such that a
concentration of not more than 1.25 percent at 20°C, based on the gross
volume of the machinery space, is obtained when the units have jointly
been put into operation;
3.5.2. for the volume of
Halon 1301 shall be calculated 0.16 m3/kg and for the volume of Halon
1211 shall be calculated 0.14 m3/kg.