AS/NZS 2739:2009 NATURAL GAS (NG) FUEL SYSTEMS FOR VEHICLE ENGINES
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 OBJECTIVE
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.4.1 Approved, approval
1.4.2 Authority
1.4.3 Authorized person
1.4.4 Automatic fuel shut-off device
1.4.5 Breakaway coupling
1.4.6 Capacity (of a container)
1.4.7 Certified kit
1.4.8 CNG (compressed natural gas)
1.4.9 Container
1.4.10 Container compartment
1.4.11 Container manufacturing certificate
1.4.12 Container sub-compartment
1.4.13 Cryogenically conditioned system pressure (LNG)
1.4.14 Design pressure
1.4.15 Fuel
1.4.16 Fuel flow regulation device
1.4.17 Fuel metering system
1.4.18 Fuel service line
1.4.19 Gas air mixer
1.4.20 Ignition source
1.4.21 LNG (liquefied natural gas)
1.4.22 May
1.4.23 NGV
1.4.24 Non-return valve
1.4.25 Pressure
1.4.26 Pressure relief device (PRD)
1.4.27 Professional engineer
1.4.28 Rated working pressure (CNG)
1.4.29 Refuelling connection
1.4.30 Refuelling interlock device
1.4.31 Refuelling nozzle
1.4.32 Refuelling receptacle
1.4.33 Regulator
1.4.34 Removable container
1.4.35 Shall
1.4.36 Should
1.5 NEW DESIGNS AND INNOVATIONS
1.6 VEHICLE MODIFICATIONS
1.7 IMPACT ON VEHICLE LOADING
1.8 ENGINE MANAGEMENT SYSTEM ALTERATIONS
1.8.1 General
1.8.2 Additional requirements for Australia only
1.9 APPROVED EQUIPMENT
1.10 PREVIOUSLY USED EQUIPMENT
1.10.1 Provisions
1.10.2 Prohibitions
1.11 WORKING AREA AND SAFE PRACTICES
SECTION 2 COMPONENTS
2.1 GENERAL SUITABILITY
2.1.1 General
2.1.2 Suitability for pressure
2.1.3 Suitability for installation
2.2 COMPONENT PARTS
2.3 MODIFICATION
SECTION 3 CNG CONTAINER AND FUEL SYSTEM COMPONENTS
3.1 APPLICATION
3.1.1 General
3.1.2 Fuel supply system components
3.1.3 Use of multiple components
3.2 CONTAINER
3.2.1 General
3.2.2 Container identity and type
3.2.3 Use of removable containers
3.2.4 Container painting
3.3 COMPONENTS FOR REMOVABLE CONTAINERS
3.4 CONTAINER VALVE
3.5 REFUELLING CONNECTION
3.5.1 Design of connection
3.5.2 Dust cap
3.5.3 Refuelling interlock device (New Zealand only)
3.6 REFUELLING NON-RETURN VALVE
3.7 LOCATION OF REFUELLING RECEPTACLE
3.8 REFUELLING INFORMATION PLATE
3.9 SERVICE ISOLATION VALVE
3.10 FUEL FILTER
3.11 AUTOMATIC FUEL SHUT-OFF DEVICE
3.12 FUEL FLOW REGULATION DEVICE
3.13 CONTENTS INDICATOR
3.14 CONTAINER COMPARTMENTS AND SUB-COMPARTMENTS
3.14.1 Internal containers
3.14.2 Pressure relief device discharge
3.14.3 Construction
3.14.4 Ventilation
3.14.5 Conduits
3.15 MOUNTING OF FUEL CONTAINER
3.15.1 Access to valves
3.15.2 Attachment to vehicle
3.15.3 Alternate anchoring
3.15.4 Multiple containers
3.16 CONTAINER LOCATION AND GROUND CLEARANCES
3.17 PROTECTION
3.18 HEAT SHIELDING
SECTION 4 LNG CONTAINER AND FUEL SYSTEM COMPONENTS
4.1 APPLICATION
4.1.1 General
4.1.2 LNG fuel supply system components
4.1.3 Use of multiple components
4.2 CONTAINER
4.2.1 General
4.2.2 Structural integrity
4.3 DESIGN OF REFUELLING CONNECTION
4.4 CONTAINER SHUT-OFF VALVE
4.4.1 General
4.4.2 Container filling
4.4.3 Reuse
4.4.4 Repair
4.4.5 Markings
4.5 PRESSURE RELIEF DEVICES
4.5.1 General
4.5.2 Pressure relief devices
4.5.3 Heat leak
4.6 MOUNTING OF CONTAINER(S)
4.6.1 Access to valves
4.6.2 Attachment to vehicle
4.6.3 Multiple containers
4.7 CONTAINER LOCATION AND GROUND CLEARANCES
4.8 PROTECTION OF CONTAINER
4.9 CONTAINERS MOUNTED IN THE INTERIOR OF VEHICLES
4.10 VAPORIZERS
SECTION 5 CNG AND LNG FUEL SERVICE LINES AND MATERIALS
5.1 APPLICATION
5.2 MATERIALS
5.3 RIGID PIPING
5.3.1 General
5.3.2 Design
5.4 FLEXIBLE PIPING
5.5 JOINTS AND CONNECTIONS
5.6 PIPING INSTALLATION AND PROTECTION
5.7 PIPING OR FITTINGS IN ENCLOSED SPACES
5.8 CNG TRAILERS AND SEMITRAILERS
5.9 FUEL HOSE FOR PRESSURE NOT EXCEEDING 100 kPa
5.10 NG GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 450 kPa
5.11 CNG BREAKAWAY COUPLINGS
SECTION 6 FUEL CONTROL EQUIPMENT
6.1 APPLICATION
6.2 FUEL METERING SYSTEM
6.3 FUEL SELECTOR
6.3.1 General
6.3.2 Optional fuel type
6.4 PETROL OR DIESEL SYSTEM MODIFICATIONS
6.5 ELECTRICAL WIRING
6.6 ENGINE MANAGEMENT SYSTEM
SECTION 7 INSPECTION, TESTING AND COMMISSIONING
7.1 APPLICATION
7.2 USED EQUIPMENT
7.3 MODIFICATIONS AND REPAIRS
7.4 PRECAUTIONS
7.5 INSPECTION
7.6 LEAK DETECTION
7.7 CONTAINERS
7.7.1 CNG
7.7.2 LNG
7.8 INSTALLATION TEST
7.8.1 General
7.8.2 Sealing of compartment and sub-compartment
7.8.3 Leak testing of gas system
7.8.4 Test of fuel changeover system
7.8.5 Test of automatic full shut-off device (AFSOD) operation
7.8.6 Water system tests
7.8.7 Visual inspection
7.9 PERIODIC INSPECTION
7.9.1 General
7.9.2 System check
7.10 NON-RETURN VALVE TEST
SECTION 8 CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
8.1 APPLICATION
8.2 CERTIFICATION
8.3 COMPLIANCE PLATE
8.4 LABELS AND MARKINGS
8.4.1 Vehicle identification-Australia only
8.4.2 Vehicle identification-New Zealand only
8.4.3 Refuelling information plate
8.4.4 Selector
8.5 OPERATING INSTRUCTIONS
APPENDIX A - LIST OF REFERENCED DOCUMENTS
APPENDIX B - REGULATING AGENCY INFORMATION
APPENDIX C - NEW ZEALAND CNG REFUELLING CONNECTION AND DUST PLUG
APPENDIX D - LEAK DETECTION METHODS
D1 SCOPE
D2 COMBUSTIBLE GAS DETECTORS
D3 TRACE GAS DETECTORS
D4 FOAMING AGENTS
D5 TOTAL IMMERSION
APPENDIX E - PROCEDURES FOR DEMONSTRATING COMPLIANCE WITH EXHAUST EMISSION STANDARDS (Australia only)
E1 SCOPE AND VEHICLE SELECTION
E1.1 Scope
E1.2 Use of certified kits on engine/vehicle variants
E2 ADR79/00 VEHICLES
E2.1 General requirements
E2.2 Testing requirements
E2.3 Documentation and installation requirements
E3 ADR79/01 VEHICLES
E3.1 General requirements
E3.2 Testing requirements
E3.3 Documentation and installation requirements
E4 ADR70/00 VEHICLES
E4.1 General requirements
E4.2 Testing requirements
E4.3 Documentation and installation requirements
E5 ADR80/00 AND ADR80/01 VEHICLES
E5.1 General requirements
E5.2 Testing requirements
E5.3 Documentation and installation requirements
E6 ADR79/02 VEHICLES
E6.1 General requirements
E6.2 Testing requirements
E6.3 Documentation and installation requirements
