PART I(Section 4)Design Specifications
|Description of Appliances
|This Schedule applies to the following galley and cabin-heating appliances aboard non-passenger ships:
|Gas fuel shall have a distinctive odour to indicate the presence of gas down to a concentration of 20 per cent of the lower explosive limit of the gas in the air.
|No liquefied petroleum gas fuel system of a type other than the vapour withdrawal type shall be installed or used in a ship.
|Gas fuel cylinders and regulating and safety devices shall be securely fastened and so located that escaping vapour cannot reach bilges, machinery spaces, accommodation or other enclosed spaces.
|Location of gas fuel cylinders, regulation arrangements and relief valve outlets shall be located only on open decks, on cabin tops, outside cockpits or inside housings that are gas-tight to the hull interior.
|Appliances shall be installed in accordance with the manufacturer’s instructions and shall be securely fastened.
|Appliances shall be connected in a manner that prevents undue strain on the piping.
|Only liquefied petroleum gas fuel cylinders that meet the requirements of the Transport of Dangerous Goods Directorate of the Department of Transport or the Interstate Commerce Commission of the United States shall be used.
|Liquefied petroleum gas fuel system components and piping shall have a design working pressure of not less than 1 725 kPa.
|Gas fuel piping shall
|Gas fuel piping shall not be used as part of any electrical circuit or grounding system.
|Gas fuel piping shall not be used as support or restraint for any item or fitting that is not part of the gas system.
|Any valves, regulators or other fittings exceeding 0.5 kg mass per 6 mm of pipe outside diameter shall have their mass supported by means other than the gas piping.
|Gas fuel piping shall be of a sufficient diameter to provide a sufficient supply of gas fuel to meet demand pressures at the point of use and the pressure drop between the regulator and the appliance shall not exceed 10 per cent.
|High-pressure liquefied petroleum gas fuel piping between the gas storage cylinders and the regulators shall have a minimum wall thickness of 1.24 mm and the low-pressure gas fuel piping between the regulators and the gas-burning appliances shall have a minimum wall thickness of 0.81 mm.
|Liquefied petroleum gas fuel piping shall
|Short reinforced flexible hoses and couplings used to connect the gas fuel piping system to a cylinder or gimballed appliance shall be of a type referred to in item 24.
|Short reinforced flexible hoses shall be of the minimum practicable length but not longer than 1 m and shall not extend from one cabin to another or pass through any bulkheads, partitions, deck heads or decks.
|Gas Storage Cylinders
|No gas fuel storage cylinder that permits gas in liquid form to enter any other part of the gas system shall be used.
|Each liquefied petroleum gas fuel storage cylinder shall have a manually operated screw-down shut-off valve mounted directly on the cylinder outlet.
|The manually operated screw-down shut-off valve shall be fitted with a spring-loaded safety device and with a fusible plug designed to yield when the cylinder has been emptied of liquefied petroleum gas by the relief valve under exposure to excessive heat.
|The shut-off valve, the spring-loaded safety device and the fusible plug referred to in item 20 shall each have direct communication with the vapour space of a gas fuel storage cylinder.
|A multiple-cylinder gas fuel system shall be fitted with a manually operated two-way positive shut-off manifold valve so arranged that the replacement of empty cylinders may be made without shutting down the flow of gas in the gas fuel system.
|No electrical connections shall be made within a gas fuel storage cylinder enclosure.
|Gas Fuel Components and Appliances
|Except for the gas fuel storage cylinders, only gas fuel components and appliances that meet the requirements of the Canadian Gas Association, the Compressed Gas Association, the Underwriters’ Laboratories of Canada or the Underwriters’ Laboratories Incorporated shall be used.
|All valves and regulators embodied in the gas fuel system for the purpose of pressure relief, regulation or control of gas pressure and flow rates shall be securely mounted in a position readily accessible for operation, inspection, maintenance and testing, and shall be protected against physical damage.
|The gas fuel system shall be fitted with a regulating device adjusted to release gas to the consuming appliance at a pressure not in excess of 4.5 kPa.
|The low-pressure side of all regulators in the gas fuel system shall be protected against excessive pressure by means of a suitable relief valve that is fitted to the regulator and set to discharge at a pressure of not less than twice, and not more than three times, the delivery pressure.
|All regulators in the gas fuel system shall be fitted with a pressure gauge located on the high-pressure side of the regulator.
|A master packless shut-off valve controlling all burners simultaneously shall be installed on the console of each gas-burning appliance.
|All appliances incorporating pilot-lights or other continuous-burning flame devices shall incorporate a flame failure device arranged to shut off the main and pilot gas in the event of flame failure.
|Installation clearances between appliances and adjacent combustible material shall not be less than the clearances specified in the manufacturer’s instructions.
|The piping and components in the gas fuel system shall be located so that gas leakage tests may be carried out at prescribed intervals as follows:
|Systems Installation for Ships Exceeding 24 m in Length
|Gas fuel storage cylinders and pressure-regulating and relief arrangements shall be
|Spare and empty gas fuel cylinders shall have valve outlets that are capped and may be stored within the metal enclosure or may be secured on the open deck in a location that is protected from damage, direct rays of the sun and heat by a suitable cover, and the enclosure or cover shall be ventilated to prevent the accumulation of gas.
|The metal enclosure shall be designed to be closed at all times except when access is required to change cylinders in the gas system or to maintain equipment, and only the following items shall be stored in the enclosure:
|Gas fuel storage cylinder pressure-relief valves shall be vented away from the cylinders and, as far as practicable, upwards to prevent impingement of escaping gas onto the cylinders.
|Gas fuel safety device vent outlets shall end at least 1.5 m from enclosed space openings and ventilation intakes.
|Compartments containing liquefied petroleum gas-burning appliances that are located above the weather deck shall be ventilated by
|Compartments that contain liquefied petroleum gas-burning appliances or in which gas may accumulate and that are located entirely below the weather deck shall be ventilated by mechanical ventilation of the positive extraction type with a spark-proof fan and motor having sufficient capacity to effect at least 10 air changes per hour through ventilators leading to and from the open deck and the extraction duct of the ventilator shall extend from the deck level and the inlet duct of the ventilator shall extend to the deckhead of the compartment.
|Systems Installation for Ships not Exceeding 24 m in Length
|Gas fuel storage cylinders and pressure-regulating and relief arrangements shall be
|Gas fuel storage cylinder pressure-relief valves shall be vented away from the cylinders, and, as far as practicable, upwards to prevent impingement of escaping gas onto the cylinders.
|Gas fuel safety device vent outlets from safety devices shall end as far as practicable from enclosed space openings and ventilation intakes.
|Spare and empty gas fuel cylinders shall have capped valve outlets, and shall be secured on the open deck and protected from damage, direct rays of the sun and heat.
|Compartments that contain gas-burning appliances or in which gas may accumulate shall be efficiently ventilated so that inside air is exhausted through a vent opening located at the lowest part of the compartments.
|Safety Notices for All Ships
|Printed manufacturer’s instructions for the proper installation, maintenance and operation of each gas-burning appliance shall be permanently mounted in a readily visible location adjacent to the appliance.
|The gas fuel cylinder storage location shall prominently display the following warning and operating instructions:
LIQUEFIED PETROLEUM GAS FUEL
NO OPEN FLAME
BEFORE TURNING ON GAS FUEL READ OPERATING INSTRUCTIONS BELOW
KEEP CYLINDER VALVES CLOSED WHEN CYLINDER EMPTY OR SHIP IS UNATTENDED
BE SURE ALL APPLIANCE VALVES ARE CLOSED BEFORE OPENING THE CYLINDER VALVES
CLOSE APPLIANCE VALVES WHEN APPLIANCE IS NOT IN USE
TEST SYSTEM FOR LEAKAGE AT LEAST TWICE A MONTH
CONSUMER OPERATING INSTRUCTIONS
|The following warning and safety instructions shall be prominently posted in spaces where gas fuel appliances are located:
ENSURE THAT FRESH AIR VENTILATION SYSTEM IS IN OPERATION WHEN USING FUEL-BURNING APPLIANCE
PARTS II to IV[Repealed, SOR/2021-135, s. 81]
- SOR/2015-161, ss. 29(E), 30(E), 31(F)
- SOR/2021-135, s. 81
- Date modified: