Hong Kong Regulations

MERCHANT SHIPPING (SEAFARERS) (CREW ACCOMMODATION) REGULATION - SCHEDULE 4

TRUNKED MECHANICAL VENTILATION SYSTEMS

[sections 3, 16 & 42]

(1) The trunked mechanical ventilation system referred to in section 16 of
this Regulation (in this Schedule referred to as "the system") shall, in
relation to the spaces specified in column 2 of Table I of this Schedule, be
capable of the respective standards of performance specified in column 3 or 4
of that Table, whichever standard shall be the higher in the circumstances. In
this paragraph and in Table I of this Schedule, the term "spaces" (艙位)
excludes the spaces mentioned in Table II of this Schedule.

(2) The system shall, in relation to the spaces specified in column 2 of Table
II, be capable of the respective standards of performance specified in columns
3 and 4 of that Table.

(3) A supply system shall be provided for the galley to provide the air
changes required in Table II. That supply system may serve the provision store
rooms as well as the galley, but shall be separate from the supply system for
any other spaces.

(4) A separate exhaust system shall be provided for the galley to provide the
air changes required in Table II.

(5) If any provision store room is served by a fan which provides warmed air
for any other space, the store room shall be provided with ventilation
trunking separate from that serving such other space.

(6) The clear area of the exhaust openings provided in conjunction with the
system shall be sufficient to ensure that the velocity of air at each exhaust
opening does not exceed 305 metres per minute when the system is in operation.

(7) The speed of every supply fan forming part of the system shall be capable
of being varied where DC motors are used.

(8) The system shall be quiet in operation.

(9) All trunking forming part of the system shall be fitted with non-return
flaps where such flaps are necessary for the exclusion of effluvia and the
preservation of health of the crew.

(10) If the system is designed to circulate heated air as the sole means of
heating the crew accommodation, the system shall be sub-divided into sections
which can be separately controlled to the extent necessary to enable a
comfortable temperature to be maintained in all parts of the crew
accommodation.

(11) The spare gear referred to in section 16(6) of this Regulation shall be-
For Air Conditioning Units, Supply and Exhaust Fans, Refrigerating Machinery
and Seawater Pump Motors: (for each size fitted) 1-set Bearings Starters: (for
each size fitted) 1-set Contacts 1-set Springs 1-Operating Coil Mechanical
Spares for Pump: (for each size fitted) 1-set Wearing Rings 1-set Seal parts
For Air Conditioning Units 1-set Air Filter Cells (if throw-away type fitted)
1-set Fan Bearings for A/C Unit 1-set Vee Belts of each size and type fitted
For Refrigerating Machinery Compressor: (for each size fitted) 1-Gasket Set
1-Shaft Seal Replacement 1-set Piston Rings 1-complete set Connecting Rod
Bolts and Nuts 1-complete set Connecting Rod Bearings 1-set Discharge Valve
Discs 1-set Discharge Valve Springs 1-set Suction Valve Discs 1-set Suction
Valve Springs 1-Main Bearing-Pump End 1-Main Bearing-Seal End 2-Pump End
Bearing Washers (Bronze) 2-Seal End Bearing Washers (Bronze) 2-Seal End Thrust
Washers (Steel) 1-Oil Filter Condenser: (for each size fitted) 1-set End Cover
Gaskets 1-set Condenser Anodes 1-Tube Cleansing Brush Miscellaneous: 1-Oil
Differential Switch 1-High/Low Pressure Switch 1-set Drier Cores 1-Relief
Valve 1-set Packing for Refrigerating Line Valves 1-set Vee Belts of each size
fitted 1-Expansion Valve of each size fitted 1-Leak Detector

TABLE I

(not applicable to Spaces specified in Table II)

1

Cate-gory 2

Space
3

Fresh air changes per hour 4
Volume of fresh air in cubic metres per minute, for each seafarer likely to
use the room at any
one time A

        (i)   

        (ii)   Accommodation above the Upper Deck
Rooms (other than those in Category (ii))

(1) outside rooms (other than rooms adjoining machinery casings)

(2) inside rooms and rooms adjoining machinery casings
Mess rooms, smoking rooms and recreation rooms

(1) not adjoining machinery casings

(2) adjoining machinery casings

12

15

15
18

1.42

1.42

0.71(a)
0.71(a) B

        (i)   

        (ii)   Accommodation below the Upper Deck of Motor Vessels
Rooms (other than those in Category (ii))

(1) outside rooms (other than rooms adjoining machinery casings)

(2) inside rooms and rooms adjoining machinery casings
Mess rooms, smoking rooms and recreation rooms

(1) not adjoining machinery casings

(2) adjoining machinery casings

12

15

15
18

1.42

1.70

0.71
0.71 C

        (i)   

        (ii)  

Accommodation below the Upper Deck of Steam Ships
Rooms (other than those in Category (ii))

(1) outside rooms (other than rooms immediately above or adjoining machinery
casings)

(2) inside rooms and rooms immediately above or adjoining machinery casings
Mess rooms, smoking rooms and recreation rooms

(1) not adjoining machinery casings

(2) adjoining machinery casings

12

18

18
20

1.42

1.70

0.85(b)
0.85(b) D Passageways above and below the Upper Deck
Adjoining machinery casings
4
--

   (a)  Provided that whatever the number of seafarers likely to use the room
        at any one time, the total volume of fresh air per minute shall not be
        required to exceed such volume per minute as would produce 20 fresh
        air changes per hour.

   (b)  Provided that whatever the number of seafarers likely to use the room
        at any one time, the total volume of fresh air per minute shall not be
        required to exceed such volume per minute as would produce 25 fresh
        air changes per hour.

TABLE II

3 4
Fresh air changes per hour 1 Categ-ory 2

Space Supply Exhaust E Galleys 20(c) 40 F Sanitary accommodation, laundries,
drying rooms and pantries
Private or semi-private (d)

   (d)  15

10 G Wards in permanent hospitals 12
or such greaternumber as would
result in the supply of not less than 1.42 cubic metres fresh air per minute
for each bed in the ward -- H Dry provisions store rooms Not less than 10and
not more than 20(e) --

   (c)  15, if at least 2 sides of the galley are exposed to the weather.

   (d)  Mechanical supply ventilation may be fitted in addition to the
        mechanical exhaust ventilation provided that the volume of air
        supplied does not exceed that provided by the exhaust.

   (e)  Subject to the provisions of section 33(3) of this Regulation.
        "spaces" (艙位) excludes the spaces mentioned in Table II of this
        Schedule.