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  • AS/NZS 1425:2003

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    LP Gas fuel systems for vehicle engines

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

    Superseded date:  30-06-2017

    Language(s):  English

    Published date:  01-01-2003

    Publisher:  Standards Australia

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

    1 - AS/NZS 1425:2003 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 Capacity (of a container)
    9 - 1.5.7 Certified kit
    9 - 1.5.8 Compartment
    9 - 1.5.9 Container
    9 - 1.5.10 Contents gauge
    10 - 1.5.11 Double non-return valve
    10 - 1.5.12 Excess-flow valve
    10 - 1.5.13 Fill line
    10 - 1.5.14 Fixed liquid level gauge
    10 - 1.5.15 Fuel
    10 - 1.5.16 Fuel filter
    10 - 1.5.17 Fuel injector
    10 - 1.5.18 Fuel service line
    10 - 1.5.19 Gas-air mixer
    10 - 1.5.20 Hydrostatic relief valve
    10 - 1.5.21 Ignition source
    10 - 1.5.22 Internal (component)
    11 - 1.5.23 Licensed installer
    11 - 1.5.24 LP Gas
    11 - 1.5.25 Maximum permitted filling level
    11 - 1.5.26 May
    11 - 1.5.27 Non return valve
    11 - 1.5.28 POL coupling
    11 - 1.5.29 Pressure
    11 - 1.5.30 Professional engineer
    11 - 1.5.31 Regulator
    11 - 1.5.32 Relief valve
    12 - 1.5.33 Removable container
    12 - 1.5.34 Safety coupling
    12 - 1.5.35 Safety valve
    12 - 1.5.36 Service valve
    12 - 1.5.37 Shall
    12 - 1.5.38 Should
    12 - 1.5.39 Sub-compartment
    12 - 1.5.40 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
    14 - 1.13 WORKING AREA AND SAFE PRACTICES
    14 - 1.14 REGULATORY AGENCIES
    15 - SECTION 2 COMPONENTS
    15 - 2.1 GENERAL SUITABILITY
    15 - 2.1.1 General
    15 - 2.1.2 Suitability for pressure
    15 - 2.2 MOVING PARTS
    15 - 2.3 SUITABILITY FOR INSTALLATION
    16 - 2.4 MODIFICATION
    16 - 2.5 METALS
    16 - 2.6 NON-METALS
    17 - SECTION 3 CONTAINER SUB-ASSEMBLY
    17 - 3.1 APPLICATION
    17 - 3.2 CONTAINER
    17 - 3.2.1 General
    17 - 3.2.2 Use of removable containers
    17 - 3.3 COMPONENTS FOR FIXED CONTAINERS
    17 - 3.4 COMPONENTS FOR REMOVABLE CONTAINERS
    18 - 3.5 COMPONENT SUITABILITY
    18 - 3.6 FILLING CONNECTION
    18 - 3.7 FILLER NON-RETURN VALVE SYSTEM
    18 - 3.7.1 Direct filling system
    19 - 3.7.2 Remote filling system
    19 - 3.7.3 Internal non-return valve
    19 - 3.7.4 Filler cap
    19 - 3.7.5 Filling point location
    20 - 3.8 AUTOMATIC FILL LIMITER (AFL)
    20 - 3.8.1 Design
    20 - 3.8.2 Performance
    20 - 3.8.3 Durability
    21 - 3.9 FIXED LIQUID LEVEL GAUGE
    21 - 3.9.1 General
    21 - 3.10 CONTENTS GAUGE
    21 - 3.11 EXCESS-FLOW VALVE
    21 - 3.12 SERVICE VALVE
    21 - 3.13 AUTOMATIC FUEL SHUT-OFF DEVICE AT CONTAINER
    22 - 3.14 FUEL FILTER
    22 - 3.15 SAFETY VALVE
    22 - 3.15.1 General
    23 - 3.15.2 Safety valve discharge
    23 - 3.15.3 Safety valve discharge piping
    24 - 3.16 LOCATION OF CONTAINER COMPONENTS
    24 - 3.17 COMPARTMENTS AND SUB-COMPARTMENTS
    24 - 3.17.1 Internal containers
    24 - 3.17.2 Construction
    25 - 3.17.3 Ventilation
    25 - 3.17.4 Conduits and ducts
    26 - 3.18 MOUNTING OF FUEL CONTAINER
    26 - 3.18.1 Correct orientation
    26 - 3.18.2 Access to valves
    26 - 3.18.3 Attachment to vehicle
    29 - 3.18.4 Multiple containers
    29 - 3.19 CONTAINER LOCATION, GROUND CLEARANCES
    31 - 3.20 PROTECTION
    32 - 3.21 HEAT SHIELDING
    32 - 3.22 SUITABILITY FOR HAZARDOUS ZONES
    33 - SECTION 4 FUEL SERVICE LINE
    33 - 4.1 APPLICATION
    33 - 4.2 RIGID PIPING
    33 - 4.2.1 General
    33 - 4.2.2 Suitability of rigid piping
    33 - 4.3 FLEXIBLE PIPING (HOSE AND HOSE ASSEMBLY)
    33 - 4.4 JOINTS AND CONNECTIONS
    34 - 4.5 INSTALLATION AND PROTECTION
    35 - 4.6 PIPING OR FITTINGS IN ENCLOSED SPACES
    35 - 4.7 MULTIPLE CONTAINER INSTALLATIONS
    35 - 4.8 HYDROSTATIC RELIEF VALVE
    35 - 4.9 TRAILERS AND SEMITRAILERS
    35 - 4.10 PREVIOUSLY USED EQUIPMENT
    36 - 4.11 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 100 kPa
    36 - 4.12 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 450 kPa
    37 - SECTION 5 FUEL CONTROL EQUIPMENT
    37 - 5.1 APPLICATION
    37 - 5.2 FUEL FILTER
    37 - 5.3 AUTOMATIC FUEL SHUT-OFF DEVICE AT REGULATOR
    38 - 5.4 VAPORIZER
    38 - 5.5 REGULATOR
    38 - 5.6 INSTALLATION OF VAPORIZER AND REGULATOR
    38 - 5.7 LP GAS FUEL INJECTOR OR OTHER GAS METERING DEVICE
    38 - 5.8 GASŒAIR MIXER
    39 - 5.9 FUEL SELECTOR
    39 - 5.9.1 General
    39 - 5.9.2 Optional fuel type
    39 - 5.9.3 Bypass relief device
    39 - 5.9.4 Fuel selection control
    39 - 5.10 PETROL SYSTEM MODIFICATIONS
    40 - 5.11 ELECTRICAL WIRING
    40 - 5.12 ENGINE MANAGEMENT SYSTEM
    41 - SECTION 6 INSPECTION TESTING AND COMMISSIONING
    41 - 6.1 APPLICATION
    41 - 6.2 USED EQUIPMENT
    41 - 6.3 MODIFICATIONS AND REPAIRS
    41 - 6.4 PRECAUTIONS
    42 - 6.5 INSPECTION
    42 - 6.6 LEAK DETECTION
    42 - 6.7 CONTAINER SUB-ASSEMBLY LEAK TEST
    42 - 6.7.1 General
    42 - 6.7.2 Leak test
    43 - 6.8 INSTALLATION TEST
    43 - 6.8.1 General
    43 - 6.8.2 Gastightness of compartments and sub-compartments
    43 - 6.8.3 Leak testing of gas system
    43 - 6.8.4 Test of automatic fill limiter
    43 - 6.8.5 Test of fuel control device
    43 - 6.8.6 Coolant system tests
    43 - 6.8.7 Visual inspection
    44 - 6.9 PERIODIC INSPECTION
    44 - 6.9.1 General
    44 - 6.9.2 System check
    46 - 6.10 EXCESS FLOW VALVE TEST
    47 - 6.11 NON-RETURN VALVE TEST
    47 - 6.12 AUTOMATIC FILL LIMITER TEST
    47 - 6.13 TESTING OF AUTOMATIC FUEL SHUT-OFF DEVICE
    48 - SECTION 7 CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
    48 - 7.1 APPLICATION
    48 - 7.2 CERTIFICATION
    48 - 7.3 COMPLIANCE PLATE
    49 - 7.4 LABELS AND MARKINGS
    49 - 7.4.1 Filler markings
    49 - 7.4.2 Outlet markings
    49 - 7.4.3 Vehicle identification
    49 - 7.4.4 Controls
    49 - 7.4.5 Access hatch
    50 - 7.5 OPERATING INSTRUCTIONS
    51 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
    53 - APPENDIX B - REGULATING AGENCY INFORMATION
    56 - APPENDIX C - LEAK DETECTION METHODS
    56 - C1 SCOPE
    56 - C2 COMBUSTIBLE-GAS DETECTOR
    56 - C3 TRACE-GAS DETECTORS
    56 - C4 FOAMING AGENTS
    57 - C5 TOTAL IMMERSION
    57 - C6 VISUAL INSPECTION
    58 - APPENDIX D - PROCEDURES FOR DEMONSTRATING COMPLIANCE WITH EXHAUST EMISSION STANDARDS
    58 - D1 SCOPE AND VEHICLE SELECTION
    58 - D1.1 Scope
    59 - D1.2 Use of certified kits on engine/vehicle variants
    60 - D2 ADR79/00 VEHICLES
    60 - D2.1 General requirements
    60 - D2.2 Testing requirements
    61 - D2.3 Documentation and installation requirements
    61 - D3 ADR79/01 VEHICLES
    61 - D3.1 General requirements
    61 - D3.2 Testing requirements
    62 - D3.3 Documentation and installation requirements
    63 - D4 ADR70/00 VEHICLES
    63 - D4.1 General requirements
    63 - D4.2 Testing requirements
    64 - D4.3 Documentation and installation requirements
    65 - D5 ADR80/00 AND ADR80/01 VEHICLES
    65 - D5.1 General requirements
    65 - D5.2 Testing requirements
    65 - D5.3 Documentation and installation requirements

    Abstract - (Show below) - (Hide below)

    Sets out 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.

    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 forklifts, floor sweepers, polishers, tow tractors, elevating work platforms and industrial stationary engines and to other LP Gas usage, such as the gas supply system for appliances in caravans, mobile homes or for the propulsion of marine craft.This Standard does not cover the areas where major structural modifications are to be carried out to the vehicle (major structural modifications are those not defined in Clause 1.6). Prior to commencement of such work, guidance should be sought from the vehicle manufacturer or a professional engineer who is experienced in the automotive disciplines.

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

    Committee ME-046
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    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. 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.

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

    AS 1432-1996 Copper tubes for plumbing, gasfitting and drainage applications
    AS 1751-1999 Copper brazed steel tubes
    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/NZS 3509:2003 LP Gas fuel vessels for automotive use
    AS 1210-1997 Pressure vessels
    AS 2473-1996 Valves for compressed gas cylinders (threaded outlet)
    AS 2746-1999 Working areas for gas-fuelled vehicles
    AS 4291.1-2000 Mechanical properties of fasteners made of carbon steel and alloy steel - Bolts, screws and studs
    AS 2337.2-1990 Gas cylinder test stations - LP gas fuel vessels for automotive use
    AS 2613-1989 Safety devices for gas cylinders
    AS/NZS 1906.1:1993 Retroreflective materials and devices for road traffic control purposes - Retroreflective materials
    AS/NZS 1869:1996 Hose and hose assemblies for liquefied petroleum gases (LP Gas), natural gas and town gas
    AS 2430.1-1987 Classification of hazardous areas - Explosive gas atmospheres
    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 1596:2002 The storage and handling of LP Gas

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

    AS 2337.1-2004 Gas cylinder test stations General requirements, inspection and tests - Gas cylinders
    AS 3814-2005 Industrial and commercial gas-fired appliances
    AS 2337.2-2004 Gas cylinder test stations LP Gas fuel vessels for automotive use
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