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    AS/NZS 1425:2007

    AvailableSuperseded An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard. Its availability is maintained where it is referenced in legislation/regulations or in other Standards and its use should be restricted to where so referenced. No responsibility is taken by SAI Global as to the ongoing technical validity of such a Standard, the responsibility resting with the referencing authority.

    LP Gas fuel systems for vehicle engines

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  12-07-2007

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS/NZS 1425:2007 LP GAS FUEL SYSTEMS FOR VEHICLE ENGINES
    4 - PREFACE
    5 - CONTENTS
    8 - SECTION 1 SCOPE AND GENERAL
    8 - 1.1 SCOPE AND APPLICATION
    8 - 1.1.1 Scope
    8 - 1.1.2 Application
    8 - 1.2 OBJECTIVE
    8 - 1.3 REFERENCED DOCUMENTS
    8 - 1.4 NEW DESIGNS AND INNOVATIONS
    8 - 1.5 DEFINITIONS
    9 - 1.5.1 Approved, approval
    9 - 1.5.2 Authority
    9 - 1.5.3 Authorized person
    9 - 1.5.4 Automatic fill limiter
    9 - 1.5.5 Automatic fuel shut-off device
    9 - 1.5.6 Bi-fuel vehicle
    9 - 1.5.7 Capacity (of a container)
    9 - 1.5.8 Certified kit
    9 - 1.5.9 Compartment
    9 - 1.5.10 Container
    10 - 1.5.11 Contents gauge
    10 - 1.5.12 DOTARS
    10 - 1.5.13 Double non-return valve
    10 - 1.5.14 Dual-fuel vehicle
    10 - 1.5.15 Excess-flow valve
    10 - 1.5.16 Fill line
    10 - 1.5.17 Fixed liquid level gauge
    10 - 1.5.18 Fuel selector
    10 - 1.5.19 Fuel filter
    10 - 1.5.20 Fuel injector
    10 - 1.5.21 Fuel service line
    10 - 1.5.22 GasŒair mixer
    10 - 1.5.23 Hydrostatic relief valve
    10 - 1.5.24 Ignition source
    11 - 1.5.25 Internal (component)
    11 - 1.5.26 Licensed installer
    11 - 1.5.27 LP Gas
    11 - 1.5.28 Maximum permitted filling level
    11 - 1.5.29 May
    11 - 1.5.30 Mono-fuel vehicle
    11 - 1.5.31 NATA
    11 - 1.5.32 Non return valve
    11 - 1.5.33 POL coupling
    11 - 1.5.34 Pressure
    11 - 1.5.35 Professional engineer
    12 - 1.5.36 Regulator
    12 - 1.5.37 Relief valve
    12 - 1.5.38 Removable container
    12 - 1.5.39 Safety coupling
    12 - 1.5.40 Safety valve
    12 - 1.5.41 Service valve
    12 - 1.5.42 Shall
    12 - 1.5.43 Should
    12 - 1.5.44 Sub-compartment
    12 - 1.5.45 Vaporizer
    12 - 1.6 VEHICLE MODIFICATIONS
    13 - 1.7 MINOR ALTERATIONS
    13 - 1.8 ENGINE MANAGEMENT SYSTEM
    14 - 1.9 APPROVED EQUIPMENT
    14 - 1.10 PREVIOUSLY USED EQUIPMENT
    14 - 1.11 LP GAS WITHDRAWAL FROM AUTOMOTIVE SYSTEMS
    14 - 1.12 DECOMMISSIONING OF LP GAS FUEL SYSTEM
    15 - 1.13 WORKING AREA AND SAFE PRACTICES
    15 - 1.14 REGULATORY AGENCIES
    16 - SECTION 2 COMPONENTS
    16 - 2.1 GENERAL SUITABILITY
    16 - 2.1.1 General
    16 - 2.1.2 Suitability for pressure
    16 - 2.2 MOVING PARTS
    16 - 2.3 SUITABILITY FOR INSTALLATION
    17 - 2.4 MODIFICATION
    17 - 2.5 METALS
    17 - 2.6 NON-METALS
    18 - SECTION 3 CONTAINER SUB-ASSEMBLY
    18 - 3.1 APPLICATION
    18 - 3.2 CONTAINER
    18 - 3.2.1 General
    18 - 3.2.2 Use of removable containers
    18 - 3.3 COMPONENTS FOR FIXED CONTAINERS
    18 - 3.4 COMPONENTS FOR REMOVABLE CONTAINERS
    19 - 3.5 COMPONENT SUITABILITY
    19 - 3.6 FILLING CONNECTION
    19 - 3.7 FILLER NON-RETURN VALVE SYSTEM
    19 - 3.7.1 Direct filling system
    20 - 3.7.2 Remote filling system
    20 - 3.7.3 Internal non-return valve
    20 - 3.7.4 Filler cap
    20 - 3.7.5 Filling point location
    21 - 3.8 AUTOMATIC FILL LIMITER (AFL)
    21 - 3.8.1 Design
    21 - 3.8.2 Performance
    21 - 3.8.3 Durability
    22 - 3.9 FIXED LIQUID LEVEL GAUGE
    22 - 3.10 CONTENTS GAUGE
    22 - 3.11 EXCESS-FLOW VALVE
    22 - 3.12 SERVICE VALVE
    22 - 3.13 AUTOMATIC FUEL SHUT-OFF DEVICE AT CONTAINER
    24 - 3.14 FUEL FILTER
    24 - 3.15 SAFETY VALVE
    24 - 3.15.1 General
    24 - 3.15.2 Safety valve discharge
    24 - 3.15.3 Safety valve discharge piping
    25 - 3.16 LOCATION OF CONTAINER COMPONENTS
    25 - 3.17 COMPARTMENTS AND SUB-COMPARTMENTS
    25 - 3.17.1 Internal containers
    26 - 3.17.2 Construction
    26 - 3.17.3 Ventilation
    27 - 3.17.4 Conduits and ducts
    27 - 3.18 MOUNTING OF FUEL CONTAINER
    27 - 3.18.1 Correct orientation
    27 - 3.18.2 Access to valves
    28 - 3.18.3 Attachment to vehicle
    30 - 3.18.4 Multiple containers
    31 - 3.19 CONTAINER LOCATION, GROUND CLEARANCES
    32 - 3.20 PROTECTION
    34 - 3.21 HEAT SHIELDING
    34 - 3.22 SUITABILITY FOR HAZARDOUS ZONES
    35 - SECTION 4 FUEL SERVICE LINE
    35 - 4.1 APPLICATION
    35 - 4.2 RIGID PIPING
    35 - 4.2.1 General
    35 - 4.2.2 Suitability of rigid piping
    35 - 4.3 FLEXIBLE PIPING (HOSE AND HOSE ASSEMBLY)
    35 - 4.4 JOINTS AND CONNECTIONS
    36 - 4.5 INSTALLATION AND PROTECTION
    37 - 4.6 PIPING OR FITTINGS IN ENCLOSED SPACES
    37 - 4.7 MULTIPLE CONTAINER INSTALLATIONS
    37 - 4.8 HYDROSTATIC RELIEF VALVE
    37 - 4.9 TRAILERS AND SEMITRAILERS
    38 - 4.10 PREVIOUSLY USED EQUIPMENT
    38 - 4.11 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 7 kPa
    38 - 4.12 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 450 kPa
    39 - SECTION 5 FUEL CONTROL EQUIPMENT
    39 - 5.1 APPLICATION
    39 - 5.2 FUEL FILTER
    39 - 5.3 AUTOMATIC FUEL SHUT-OFF DEVICE AT REGULATOR
    40 - 5.4 VAPORIZER
    40 - 5.5 REGULATOR
    40 - 5.6 INSTALLATION OF VAPORIZER AND REGULATOR
    40 - 5.7 LP GAS FUEL INJECTOR OR OTHER GAS METERING DEVICE
    40 - 5.8 GASŒAIR MIXER
    41 - 5.9 FUEL SELECTOR
    41 - 5.9.1 General
    41 - 5.9.2 Optional fuel type
    41 - 5.9.3 Bypass relief device
    41 - 5.9.4 Fuel selection control
    41 - 5.10 PETROL SYSTEM MODIFICATIONS
    42 - 5.11 ELECTRICAL WIRING
    42 - 5.12 ENGINE MANAGEMENT SYSTEM
    43 - SECTION 6 INSPECTION TESTING AND COMMISSIONING
    43 - 6.1 APPLICATION
    43 - 6.2 USED EQUIPMENT
    43 - 6.3 MODIFICATIONS AND REPAIRS
    43 - 6.4 PRECAUTIONS
    44 - 6.5 INSPECTION
    44 - 6.6 LEAK DETECTION
    44 - 6.7 CONTAINER SUB-ASSEMBLY LEAK TEST
    44 - 6.7.1 General
    44 - 6.7.2 Leak test
    45 - 6.8 INSTALLATION TEST
    45 - 6.8.1 General
    45 - 6.8.2 Gastightness of compartments and sub-compartments
    45 - 6.8.3 Leak testing of gas system
    45 - 6.8.4 Test of automatic fill limiter
    45 - 6.8.5 Test of fuel control device
    45 - 6.8.6 Coolant system tests
    46 - 6.8.7 Visual inspection
    46 - 6.9 PERIODIC INSPECTION
    46 - 6.9.1 General
    47 - 6.9.2 System check
    48 - 6.10 EXCESS FLOW VALVE TEST
    49 - 6.11 NON-RETURN VALVE TEST
    49 - 6.12 AUTOMATIC FILL LIMITER TEST
    49 - 6.13 TESTING OF AUTOMATIC FUEL SHUT-OFF DEVICE
    50 - SECTION 7 CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
    50 - 7.1 APPLICATION
    50 - 7.2 CERTIFICATION
    50 - 7.3 COMPLIANCE PLATE
    51 - 7.4 LABELS AND MARKINGS
    51 - 7.4.1 Filler markings
    51 - 7.4.2 Outlet markings
    51 - 7.4.3 Vehicle identification
    51 - 7.4.4 Controls
    52 - 7.4.5 Access hatch
    52 - 7.5 OPERATING INSTRUCTIONS
    53 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
    55 - APPENDIX B - REGULATING AGENCY INFORMATION
    57 - APPENDIX C - LEAK DETECTION METHODS
    57 - C1 SCOPE
    57 - C2 COMBUSTIBLE-GAS DETECTOR
    57 - C3 TRACE-GAS DETECTORS
    57 - C4 FOAMING AGENTS
    58 - C5 TOTAL IMMERSION
    58 - C6 VISUAL INSPECTION
    59 - APPENDIX D - PROCEDURES FOR DEMONSTRATING COMPLIANCE WITH EXHAUST EMISSION STANDARDS (Australia only)
    59 - D1 SCOPE AND VEHICLE SELECTION
    59 - D1.1 Scope
    60 - D1.2 Use of certified kits on engine/vehicle variants
    61 - D2 ADR79/00 VEHICLES
    61 - D2.1 General requirements
    61 - D2.2 Testing requirements
    62 - D2.3 Documentation and installation requirements
    62 - D3 ADR79/01 VEHICLES
    62 - D3.1 General requirements
    62 - D3.2 Testing requirements
    63 - D3.3 Documentation and installation requirements
    64 - D4 ADR70/00 VEHICLES
    64 - D4.1 General requirements
    64 - D4.2 Testing requirements
    65 - D4.3 Documentation and installation requirements
    66 - D5 ADR80/00 AND ADR80/01 VEHICLES
    66 - D5.1 General requirements
    66 - D5.2 Testing requirements
    67 - D5.3 Documentation and installation requirements
    67 - D6 ADR79/02 VEHICLES
    67 - D6.1 General requirements
    67 - D6.2 Testing requirements
    68 - D6.3 Documentation and installation requirements

    Abstract - (Show below) - (Hide below)

    This Standard specifies requirements for liquefied petroleum gas (LP Gas) fuel systems for engines mounted on motor vehicles, either for the propulsion of the vehicles or for driving some auxiliary function, e.g. a mixer or a pump.

    Scope - (Show below) - (Hide below)

    This Standard specifies requirements for liquefied petroleum gas (LP Gas) fuel systems for engines mounted on motor vehicles, either for the propulsion of the vehicles or for driving some auxiliary function, e.g. a mixer or a pump. It provides requirements for the design and construction of component parts, and for their installation in vehicles, and for tests, commissioning, and periodic inspection.This Standard does not apply to LP Gas usage such as the gas supply system for appliances in caravans, mobile homes, forklifts, floor sweepers, polishers, tow tractors, elevating work platforms and industrial engines (refer to AS 4983) or for the propulsion of marine craft (refer to AS 4732). This Standard does not address the requirements that may apply to structural modifications carried out on the vehicle. Prior to the commencement of such work, guidance should be sought from local Transport Authority, vehicle manufacturer or a professional engineer experienced in automotive disciplines.

    General Product Information - (Show below) - (Hide below)

    Committee ME-046
    Document Type Standard
    Publisher Standards Australia
    Status AvailableSuperseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS 1425-1973.Second edition 1979.Third edition 1982.Fourth edition 1989.First published in New Zealand in part as part of NZS 5422.1:1980.Second edition 1987.NZS 5422.3 first published 1991.AS 1425-1989, NZS 5422.1:1987 and part of NZS 5422.3-1991 jointly revised, amalgamated and designated AS/NZS 1425:1999.Sixth edition 2003.Seventh edition 2007. Originated in Australia as AS 1425-1973. Originated in New Zealand in part as part of NZS 5422.1:1980. Previous edition AS/NZS 1425:2003. Seventh edition 2007.

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS/NZS 3509:2003 LP Gas fuel vessels for automotive use
    AS 2613-2005 Safety devices for gas cylinders
    AS 2746-1999 Working areas for gas-fuelled vehicles
    AS 2473.3-2004 Valves for compressed gas cylinders - Outlet connections for medical gases (including pin-indexed yoke connections)
    AS 2030.1-1999 The verification, filling, inspection, testing and maintenance of cylinders for storage and transport of compressed gases Cylinders for compressed gases other than acetylene
    AS 1271-2003 Safety valves, other valves, liquid level gauges and other fittings for boilers and unfired pressure vessels (Reconfirmed 2016)
    AS 1572-1998 Copper and copper alloys - Seamless tubes for engineering purposes (Reconfirmed 2018)
    AS 4983-2003 Gas fuel systems for forklifts and industrial engines
    AS 2473.1-2006 Valves for compressed gas cylinders Specifications, type testing, and manufacturing tests and inspections
    AS 2473-1996 Valves for compressed gas cylinders (threaded outlet)
    AS/NZS 60079.10:2004 Electrical apparatus for explosive gas atmospheres Classification of hazardous areas (IEC 60079-10:2002 MOD)
    AS 1751-1999 Copper brazed steel tubes
    AS 1432-2004 Copper tubes for plumbing, gasfitting and drainage applications
    AS D26-1972 Tube fittings with dryseal American standard taper pipe and unified threads for automotive and industrial use (imperial units) (Reconfirmed 2018)
    AS/NZS 1869:1996 Hose and hose assemblies for liquefied petroleum gases (LP Gas), natural gas and town gas
    AS 1968-1976 Helical spring lock washers (metric series)
    AS/NZS 1596:2002 The storage and handling of LP Gas
    AS/NZS 1906.1:2007 Retroreflective materials and devices for road traffic control purposes Retroreflective sheeting
    AS 1210 SUPP 2-1999 Pressure vessels - Cold-stretched austenitic stainless steel vessels (Supplement to AS 1210-1997)
    AS 1210 SUPP 1-1990 Unfired Pressure Vessels - Advanced design and construction (Supplement to AS 1210-1997)
    AS 4291.1-2000 Mechanical properties of fasteners made of carbon steel and alloy steel - Bolts, screws and studs
    AS 1210-1997 Pressure vessels
    AS 4732-2002 LP Gas fuel systems for marine engines
    MP 48-2007 Certificated gas cylinder test stations
    AS 2337.2-2004 Gas cylinder test stations LP Gas fuel vessels for automotive use (Reconfirmed 2016)

    Standards Referencing This Book - (Show below) - (Hide below)

    AS/NZS 1596:2002 The storage and handling of LP Gas
    AS 2077-1982 Methods of test for fuel consumption of passenger cars, their derivatives and multi-purpose passenger cars
    AS 1470-1986 Health and safety at work - Principles and practices
    AS/NZS 3509:2003 LP Gas fuel vessels for automotive use
    AS 2877-1986 Methods of test for fuel consumption of motor vehicles designed to comply with Australian Design Rules 37 and 40
    AS 2337.1-2004 Gas cylinder test stations General requirements, inspection and tests - Gas cylinders
    AS 1210-2010 Pressure vessels (Reconfirmed 2021)
    AS/NZS 1869:1996 Hose and hose assemblies for liquefied petroleum gases (LP Gas), natural gas and town gas
    AS 2809.5-2001 Road tank vehicles for dangerous goods Tankers for bitumen-based products
    AS 2359.2-1985 Industrial trucks (known as the SAA Industrial Truck Code) - Operation
    AS 3645-2010 Essential requirements for gas equipment
    AS 2746-2008 Working areas for gas-fuelled vehicles
    AS 3873-2001 Pressure equipment - Operation and maintenance
    AS 2337.2-2004 Gas cylinder test stations LP Gas fuel vessels for automotive use (Reconfirmed 2016)
    AS 2746-1999 Working areas for gas-fuelled vehicles
    AS/NZS 1596:2008 The storage and handling of LP Gas
    AS 1210-1997 Pressure vessels
    HB 13-2007 Electrical equipment for hazardous areas
    AS/NZS 3509:2009 LP Gas fuel vessels for automotive use (Reconfirmed 2019)
    AS/NZS 4346:1995 Guide to the installation in vehicles of mobile communication equipment intended for connection to a cellular mobile telecommunication service (CMTS)
    AS 2359.1-1995 Powered industrial trucks - General requirements
    AS 3814-2009 Industrial and commercial gas-fired appliances
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