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TABLE 6. 5 SPACING OF PIPE SUPPORTS

TABLE 6. 5 SPACING OF PIPE SUPPORTS

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AS 5601 – 2000
AG 601 – 2000

128

6.3.5.8 Protection of piping where penetrating a partition, deck, floor,
structural member or bulkhead
Where consumer piping penetrates a partition, deck, floor, structural member or
bulkhead, the pipe shall be protected against abrasion.
NOTE: A rubber grommet or the like fitted to the piping will satisfy this requirement.

6.3.5.9 Deck or bulkhead penetrations to be vapour-proof
Where piping penetrates a deck or bulkhead, the penetration shall be made vapourproof.
NOTE: To satisfy this requirement the vapour-proofing is to be carried out after the
protection required by Clause 6.3.5.8 has been fitted.

6.3.5.10 Pressure testing of consumer piping

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The consumer piping for a marine craft shall have no loss of pressure when
subjected to the following tests:
(a)

With no appliances or regulators connected, a pressure test using a 200 kPa
test pressure and test duration of 10 minutes.

(b)

With appliances and regulators connected, a pressure test in accordance with
Appendix E.

6.3.6 Appliances
NOTE: Where a cooking appliance is to be installed consideration should be given to the
fitting of fiddle rails and pot holders to the appliance to prevent unintentional movement
of cooking vessels.

6.3.6.1 Prohibited appliances
The following appliances shall not be installed in a marine craft:
(a)

A flueless water heater.

(b)

An appliance which is designed to operate at a pressure exceeding 2.75 kPa.

NOTES:
1 An appliance that is permanently fixed in place or an appliance that is fitted in a
location where it is intended to be used or likely to be used is deemed to be installed.
2 An appliance operating at a pressure exceeding 2.75 kPa on commercial vessels may
be exempted from requirement (b) by the Authority.
3 In respect to space heaters see Clause 6.3.6.3.

6.3.6.2 Restriction on installation of an appliance on a petrol-fuelled craft
Where an appliance with a continuously burning flame is to be installed below the
upper deck of a petrol-fuelled craft, the appliance shall be installed so the air intake
to the continuously burning flame is at least 600 mm above the deck on which the
appliance is to be mounted.
NOTE: This does not apply where there is no possibility of petrol vapour entering the
space where the appliance is to be mounted.

6.3.6.3 Restriction on installation of space heaters
A space heater, other than of a room-sealed type, shall not be installed on a marine
craft.
NOTE: For a space heater installation on a house-boat, the Authority should be
contacted, as a flueless space heater may be permitted in the living area of the houseboat where the area can be isolated from the sleeping area. The heater needs to be fitted
with a flame safeguard, tilt safety switch and oxygen depletion device. The maximum gas
consumption of the heater is not to exceed 0.2 MJ/h for each cubic metre of room
volume.
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AS 5601 – 2000
AG 601 – 2000

6.3.6.4 Required clearance between appliance and fuel filler cap or vent
Except for marine craft fuelled by diesel, the minimum clearance between a fuel
filler cap or fuel tank vent and an appliance flue or combustion air intake shall
be 1 m.

6.3.6.5 Manual shut-off valve required
A manual shut-off valve shall be provided on the inlet connection of an appliance .
The valve shall be accessible for operation.

6.3.6.6 Appliance to be secured
An appliance shall be suitably secured to minimise movement or vibration of the
appliance and to minimise strain being imparted onto the appliance connection.

6.3.6.7 Appliance flueing
An appliance designed to be connected to a flue shall be fitted with a flue which –
(a)

except for Clause 5.13.6.2, complies with Clause 5.13; and

(b)

has a minimum clearance of 50 mm between the lowest opening of the flue
cowl and the outer surface of the marine craft.

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6.3.6.8 Installation of a refrigerator
A refrigerator shall be installed to comply with one of the following:
(a)

Be installed with means to exhaust the combustion products to outside
atmosphere and terminate at a point not less than 100 mm from an opening
into the vessel.

(b)

Be installed within a sealed recess that complies with Clause 5.12.18.4.

6.3.6.9 Flame safeguard required for cooking appliance hotplate burners
and grill burners
Cooking appliance hotplate burners and grill burners shall be fitted with a flame
safeguard system except where either of the following applies:
(a)

The appliance is installed in an area which has a ventilation opening
complying with the size requirement of Clause 6.3.7 at low level.

(b)

A gas detection system complying with Appendix K is installed.

NOTE: Commercial catering equipment installed in Class 1E – Sheltered Waters
Passenger Vessels for use in Smooth Waters only (as defined in the Uniform Shipping
Laws Code) may be exempt from meeting this requirement.

6.3.6.10 Appliance installed on gimbals
Where an appliance is to be installed on gimbals, all of the following shall apply:
(a)

The appliance is to be connected by a hose assembly.

(b)

Limits are to be fitted to minimise stress being imparted onto the hose
assembly.
NOTE: These limits should permit adequate movement of the appliance during normal
operating conditions, however, still ensure this requirement is satisfied. See also
Clauses 5.12.1.7 (d & e).

(c)

The clearances to combustible surfaces required by Clause 5.12.1.1 are to be
maintained at all possible positions of the appliance .
NOTE: Where these clearances are not obtainable, the Authority should be contacted
as the fitting of a deflector shield may permit lesser clearances.

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AS 5601 – 2000
AG 601 – 2000

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(d)

Means are to be provided to positively retain the appliance within the gimbals
at all angles of tilt.

(e)

Means are to be provided to prevent movement when the appliance is not in
use.

6.3.6.11 Combustible gas detection system required
Where an appliance with a continuously burning flame is to be installed below the
upper deck and there is no low level ventilation in the area where the appliance is to
be installed, a combustible gas detection system complying with Appendix K shall
be installed.
NOTE: If 50% of the total ventilation required by Clause 6.3.7 is supplied at low level the
requirement of this Clause will be satisfied.

6.3.7 Air supply to appliances

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An area in a marine craft where an appliance , other than of a room-sealed type, is
to be installed shall have at least two openings to outside. The openings shall –
(a)

provide permanent and unrestricted ventilation;

(b)

be located on opposite sides or ends of the marine craft; and

(c)

each have a minimum free ventilation area calculated using the following
formula:
A=3xT
where –
A=

the minimum free ventilation area (cm2 )

T=

the total gas consumption of all appliances in the area (MJ/h).

NOTE: It is preferable for the openings to be in the deck head and be located at each
end of the area to be ventilated.

6.3.8 Required consumer instruction plates and labels
6.3.8.1 Consumer instructions to be displayed near cylinders
A durable permanent caution plate containing the following instructions shall be
fixed in a prominent position adjacent to the cylinder:
“1

Close appliance valves before opening cylinder valve.

2

Check connection at the appliances, regulators and cylinders periodically for
leaks with soapy water, or its equivalent. This should be done at least
annually.

3

Never use a match or flame when checking leaks.

4

Close cylinder valve when appliances are not in use or whilst refuelling is in
progress.

5

No appliance with a continuously burning flame shall be left operating in any
petrol driven vessel when left unattended for a period of, or in excess of, 12
hours.”

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AS 5601 – 2000
AG 601 – 2000

6.3.8.2 Consumer instructions to be displayed near an appliance

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A durable permanent caution plate containing the following instructions shall be
fixed in a prominent position adjacent to an appliance :
“1

Close appliance valves before opening cylinder valve.

2

Check connection at the appliances, regulators and cylinders periodically for
leaks with soapy water, or its equivalent. This should be done at least
annually.

3

Never use a match or flame when checking leaks.

4

Close cylinder valve when appliances are not in use or whilst refuelling is in
progress.

5

No appliance with a continuously burning flame shall be left operating in any
petrol driven vessel when left unattended for a period of, or in excess of, 12
hours.

6

Never use cooking appliances for comfort heating.

7

When the vessel is fitted with a flammable gas detector, the gas detector shall
be checked for the presence of flammable vapours and the vessel shall be
cleared of flammable vapour before lighting any LP Gas appliance or starting
the motor.

8

In the event of fire, immediately close cylinder valve.

9

Ensure valve is closed and fit gas tight sealing plug to all spare cylinders not
connected, whether full or empty.

10

All additions or alterations to the LP Gas system shall be performed by an
authorised person. (Consult your LP Gas supplier.)

11

Appliances shall not be altered without the authorisation of the Authority.

12

Persons should familiarise themselves with the odour of unburnt LP Gas to
assist in the early detection of leaks.

13

All permanent ventilators, flues and vents should be checked regularly to
ensure that they are clear.

14

In the event of an accidental gas leak, close cylinder valve and ventilate the
vessel until air is clear.”

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AS 5601 – 2000
AG 601 – 2000

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SECTION 7 - CONTENTS
COMPRESSED NATURAL GAS (CNG) FOR APPLIANCES IN
MARINE CRAFT
7.1

CYLINDERS ......................................................................................................134
7.1.1 Cylinder requirements ..........................................................................134

7.2

REGULATING SYSTEM ....................................................................................134
7.2.1 Fitting of a regulating system ...............................................................134
7.2.2 Requirements for the regulating system...............................................134
7.2.3 Venting of the regulating system ..........................................................135
7.2.4 Maximum outlet pressure .....................................................................135

7.3

CYLINDER LOCATION......................................................................................135
7.3.1 Prohibited location................................................................................135
7.3.2 Cylinder to be accessible .....................................................................135
7.3.3 Ventilation required ..............................................................................135
7.3.4 Vent outlet to be protected from water entry ........................................135
7.3.5 Cylinder mounting ................................................................................135
7.3.6 Cylinder in a compartment – Compartment requirements....................135

7.4

CONSUMER PIPING .........................................................................................136
7.4.1 Acceptable materials for consumer piping ...........................................136
7.4.2 Piping support - Requirement and spacing ..........................................136
7.4.3 Flexibility of consumer piping system...................................................136
7.4.4 Restriction on joints in consumer piping...............................................136
7.4.5 Protection of piping where penetrating a partition, deck,
floor, structural member or bulkhead ...................................................136
7.4.6 Deck or bulkhead penetrations to be vapour-proof ..............................136

7.5

AIR SUPPLY TO APPLIANCES ........................................................................136
7.5.1 Required air supply to appliances ........................................................136

7.6

APPLIANCES ....................................................................................................137
7.6.1 Prohibited appliances ...........................................................................137
7.6.2 Appliance to be approved.....................................................................137
7.6.3 Required clearance between appliance and fuel filler cap or vent .......137
7.6.4 Appliance installed on gimbals .............................................................137
7.6.5 Installation of a refrigerator ..................................................................137
7.6.6 Warning label required adjacent to each cooking appliance ................137
7.6.7 Instruction sign required adjacent to each appliance ...........................137

7.7

CONSUMER INSTRUCTIONS ..........................................................................138
7.7.1 Consumer instructions to be displayed adjacent to cylinders...............138
7.7.2 Consumer instructions to be displayed adjacent to an appliance ........138

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AG 601 – 2000

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SECTION 7
COMPRESSED NATURAL
GAS (CNG) FOR APPLIANCES IN
MARINE CRAFT
NOTE: This Section gives requirements for cylinders and associated equipment used for
the storage of CNG in marine craft.
Installation requirements that apply to the storage cylinder, associated equipment, piping
and appliances are also covered.
Direct reference is made to Section 6 where requirements are common to CNG and LP
Gas.
Where no direct reference to other Sections is given, the relevant Clauses of Sections 1
to 5 are to apply.

7.1 CYLINDERS


7.1.1 Cylinder requirements

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A cylinder for use in a CNG system shall –
(a)

comply with AS 2030.1;

(b)

be protected against the corrosion experienced in marine conditions;

(c)

be suitable for a maximum filling pressure of 19.5 MPa when the cylinder and
its contents are at 15°C;
NOTE: The maximum filling pressure is less than the cylinder test pressure. The
cylinder test pressure is stamped into the cylinder or the valve protection shield.

(d)

have fitted into the cylinder neck, a manual shut-off valve complying with
AS 2473 which –
(i)

is fitted with a metallic hand wheel removable only with the use of tools;
and

(ii)

has a safety valve complying with AS 2613 incorporating a fusible plug
utilising an alloy with a nominal yield temperature of 100°C;
NOTE: The device in (ii) may be either a combination burst disc/fusible plug or
a combination pressure relief valve/fusible plug.

7.2 REGULATING SYSTEM
7.2.1 Fitting of a regulating system
A regulating system, complying with Clause 7.2.2, shall be connected directly to the
cylinder by a suitable coupling.
NOTE: A CGA (Compressed Gas Association USA) series 350 coupling or an Australian
equivalent would satisfy this requirement.

7.2.2 Requirements for the regulating system
The regulating system required by Clause 7.2.1 shall comply with all of the
following:
(a)

Be designed for use with CNG.

(b)

Have, in the regulating device, a flow limiting valve on the cylinder pressure
side which –
(i)

actuates and controls gas flow through the vent or vent system in the
event of regulator malfunction; and

(ii)

maintains this gas flow within the vent system’s designed pressure limit.
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(c)

AS 5601 – 2000
AG 601 – 2000

Have a pressure gauge on the cylinder pressure side of the regulating device.
NOTES:
1 Where the gauge is of the Bourdon type, the tube is to be of stainless steel.
2 The purpose of the gauge is twofold:
(a)
To monitor the amount of CNG remaining in the cylinder; and
(b)
To provide a quick and easy method for the user to test for leakage from the
system.

(d)

Have an over-pressure relief device which limits the maximum downstream
pressure to 7 kPa.

7.2.3 Venting of the regulating system
Where the vent opening of the regulating system or relief device is to be in an
enclosed space, a vent line which complies with Clause 4.7 shall be fitted to the
vent opening or relief device.

7.2.4 Maximum outlet pressure
The regulator of the regulating system shall be adjusted to ensure the maximum
outlet pressure does not exceed 1.5 kPa.

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7.3 CYLINDER LOCATION
7.3.1 Prohibited location
A cylinder shall not be installed within the interior of a marine craft other than in a
housing complying with Clause 7.3.6.

7.3.2 Cylinder to be accessible
A cylinder shall be in an accessible location.

7.3.3 Ventilation required
A cylinder shall be located in a well-ventilated open area or the requirements of
Clause 7.2.3 shall apply.

7.3.4 Vent outlet to be protected from water entry
A cylinder shall be located, or provision made, to ensure water will not enter the
regulating system’s vent outlet.

7.3.5 Cylinder mounting
A cylinder shall be securely mounted to the structure of the marine craft in
accordance with Clause 6.3.2.5.
NOTE: A cylinder may be mounted in any position providing the requirements of
Clause 7.3.3 are met.

7.3.6 Cylinder in a compartment – Compartment requirements
A cylinder compartment shall comply with all of the following:
(a)

Be constructed of corrosion-resistant material.

(b)

Be waterproof.

(c)

Be sealed to prevent gas from entering the interior of the marine craft.

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AS 5601 – 2000
AG 601 – 2000

(d)

(e)

136

Be designed to ensure that when the compartment is open –
(i)

the cylinder valve hand wheel is accessible for operation; and

(ii)

the regulating system’s pressure gauge is readily visible.

Have an opening to outside atmosphere for ventilation purposes, with a
minimum diameter of 25 mm, within the upper 5% of the total height of the
compartment.

7.4 CONSUMER PIPING
7.4.1 Acceptable materials for consumer piping
Except for a connection covered by Clause 7.2.1, piping and fittings shall comply
with Clause 6.3.5.4.

7.4.2 Piping support - Requirement and spacing
Consumer piping supports shall comply with the relevant requirements of
Clause 6.3.5.7.

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7.4.3 Flexibility of consumer piping system
To avoid the loosening of any component within a consumer piping system, the
system shall be designed with allowances for –
(a)

thermal expansion and contraction;

(b)

movement between sections of the structure; and

(c)

vibration of the structure.

NOTE: See also Clause 4.2.5 for methods of providing flexibility within the piping system.

7.4.4 Restriction on joints in consumer piping
There shall be no joints in consumer piping –
(a)

in locations which are not readily accessible;

(b)

between the branch point and a manual shut-off valve; and

(c)

where the piping passes through a sleeping accommodation area or through
an engine room.

7.4.5 Protection of piping where penetrating a partition, deck, floor,
structural member or bulkhead
Where consumer piping penetrates a partition, deck, floor, structural member or
bulkhead, the pipe shall be protected against abrasion.
NOTE: A rubber grommet or the like fitted to the piping will satisfy this requirement.

7.4.6 Deck or bulkhead penetrations to be vapour-proof
Where piping penetrates a deck or bulkhead, the penetration shall be made vapourproof.
NOTE: To satisfy this requirement the vapour-proofing is to be carried out after the
protection required by Clause 7.4.5 has been fitted.

7.5 AIR SUPPLY TO APPLIANCES
7.5.1 Required air supply to appliances
The required air supply to appliances shall be in accordance with the requirements
of Clause 6.3.7.

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AS 5601 – 2000
AG 601 – 2000

7.6 APPLIANCES
7.6.1 Prohibited appliances
The following appliances shall not be installed in a marine craft:
(a)

A flueless water heater.

(b)

A space heater, other than a room-sealed type.

7.6.2 Appliance to be approved
An appliance that is to be connected to a gas supply from a CNG cylinder shall be
approved for use with Natural Gas.

7.6.3 Required clearance between appliance and fuel filler cap or vent
Except for a marine craft fuelled by diesel, the minimum clearance between a fuel
filler cap or fuel tank vent and an appliance flue or combustion air intake shall
be 1 m.

7.6.4 Appliance installed on gimbals
Where an appliance is to be installed on gimbals, the installation shall comply with
Clause 6.3.6.10.
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7.6.5 Installation of a refrigerator
A refrigerator shall be installed to comply with one of the following:
(a)

With means, acceptable to the Authority, to exhaust the combustion products
to outside atmosphere.

(b)

Within a sealed recess which complies with Clause 5.12.18.4.

7.6.6 Warning label required adjacent to each cooking appliance
A durable permanent label containing the following information shall be displayed in
a prominent location adjacent to each cooking appliance :
“WARNING:
ALWAYS PROVIDE VENTILATION WHEN COOKING
APPLIANCE IS IN USE TO REPLACE OXYGEN AND TO VENT PRODUCTS
OF COMBUSTION.
DO NOT USE THIS APPLIANCE FOR COMFORT
HEATING.”
NOTE: This information may be included in the sign described in Clause 7.6.7.

7.6.7 Instruction sign required adjacent to each appliance
A durable permanent sign shall be located in a prominent location adjacent to each
installed appliance . The sign shall contain the following wording:
“1

THIS APPLIANCE IS DESIGNED FOR USE WITH NATURAL GAS ONLY.

2

Keep cylinder valves closed when boat is unattended.
Close them
immediately in any emergency. It is recommended that cylinder valves be
closed when appliances are not in use.

3

Be sure appliance valves are closed before opening cylinder valve.

4

Be sure to apply ignition source to burner before opening appliance valve.

5

NEVER USE FLAME TO TEST FOR LEAKS.”

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AG 601 – 2000

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7.7 CONSUMER INSTRUCTIONS
7.7.1 Consumer instructions to be displayed adjacent to cylinders
A durable permanent label containing the following instructions shall be fixed in a
prominent position adjacent to the cylinder:



“1

Close appliance valves before opening cylinder valve.

2

Check connection at the appliances, regulators and cylinders periodically for
leaks with soapy water or its equivalent. This should be done at least
annually.

3

Never use a match or flame when checking leaks.

4

Close cylinder valve when appliances are not in use.

5

All appliances must be turned off and cylinder valves closed when marine craft
is not in use or while refuelling is in progress.”

7.7.2 Consumer instructions to be displayed adjacent to an appliance

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A printed instruction sheet shall be located in a prominent position near an
appliance . The sheet shall be suitably protected from damage and contain the
following instructions:
“1

Close appliance valves before opening cylinder valve.

2

Check connection at the appliances, regulators and cylinders periodically for
leaks with soapy water or its equivalent. This should be done at least
annually.

3

Never use a match or flame when checking leaks.

4

Close cylinder valve when appliances are not in use.

5

All appliances must be turned off and cylinder valves closed when marine craft
is not in use or while refuelling is in progress.

6

In the event of an accidental gas leak, shut off engines, close cylinder valve
and ventilate the marine craft until air is clear.

7

In the event of fire, immediately close cylinder valve.

8

Close valve and fit sealing plug to all spare cylinders not connected, whether
full or empty.

9

All additions or alterations to the Natural Gas system shall be performed by an
authorised person.

10

Appliances shall not be altered without the authorisation of the Authority.

11

Persons should familiarise themselves with the odour of unburnt Natural Gas
to assist in the early detection of leaks.

12

All permanent ventilators, flues and vents should be checked regularly to
ensure that they are clean.”

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