AS/NZS 1425:1999
LP Gas fuel systems for vehicle engines
Sets out the specific requirements for LP Gas fuel systems for engines mounted on vehicles, either for the propulsion of the vehicle or for driving some auxiliary function. It also provides requirements for the design and construction of component parts, as well as their installation, testing, commissioning and periodic inspection. Reprinted to append Amendment 1:2001.
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AS/NZS 1425:1999 LP GAS FUEL SYSTEMS FOR VEHICLE ENGINES
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION
1.1.1 Scope
1.1.2 Application
1.2 OBJECTIVE
1.3 REFERENCED DOCUMENTS
1.4 NEW DESIGNS AND INNOVATIONS
1.5 DEFINITIONS
1.5.1 Approved, approval
1.5.2 Authorized person
1.5.3 Authority
1.5.4 Automatic fill limiter
1.5.5 Automatic fuel shut-off device
1.5.6 Capacity (of a container)
1.5.7 Compartment
1.5.8 Container
1.5.9 Contents gauge
1.5.10 Double non-return valve
1.5.11 Excess-flow valve
1.5.12 Fixed liquid level gauge
1.5.13 Fuel filter
1.5.14 Fuel service line
1.5.15 Gas-air mixer
1.5.16 Hydrostatic relief valve
1.5.17 Ignition source
1.5.18 Internal (component)
1.5.19 Licensed installer
1.5.20 LP Gas
1.5.21 Maximum permitted filling level
1.5.22 May
1.5.23 Non return valve
1.5.24 POL coupling
1.5.25 Pressure
1.5.26 Professional engineer
1.5.27 Regulator
1.6 VEHICLE MODIFICATIONS
1.7 MINOR ALTERATIONS
1.8 ENGINE MANAGEMENT SYSTEM
1.9 APPROVED EQUIPMENT
1.10 PREVIOUSLY USED EQUIPMENT
1.11 LP GAS WITHDRAWAL FROM AUTOMOTIVE SYSTEMS
1.12 WORKING AREA AND SAFE PRACTICES
1.13 AGENCIES
SECTION 2 COMPONENTS
2.1 GENERAL SUITABILITY
2.1.1 General
2.1.2 Suitability for pressure
2.2 MOVING PARTS
2.3 SUITABILITY FOR INSTALLATION
2.4 MODIFICATION
2.5 METALS
2.6 NON-METALS
SECTION 3 CONTAINER SUB-ASSEMBLY
3.1 APPLICATION
3.2 CONTAINER
3.2.1 General
3.2.2 Use of removable containers
3.3 COMPONENTS FOR FIXED CONTAINERS
3.4 COMPONENTS FOR REMOVABLE CONTAINERS
3.5 COMPONENT SUITABILITY
3.6 FILLING CONNECTION
3.7 FILLER NON-RETURN VALVE SYSTEM
3.7.1 Direct filling system
3.7.2 Remote filling system
3.7.3 Internal non-return valve
3.7.4 Filler cap
3.7.5 Filling point location
3.8 AUTOMATIC FILL LIMITER (AFL)
3.8.1 Design
3.8.2 Performance
3.8.3 Durability
3.9 FIXED LIQUID LEVEL GAUGE
3.9.1 General
3.9.2 Gas-bleed type
3.9.3 Sight-glass type
3.10 CONTENTS GAUGE
3.11 EXCESS-FLOW VALVE
3.12 SERVICE VALVE
3.13 AUTOMATIC FUEL SHUT-OFF DEVICE AT CONTAINER
3.14 FUEL FILTER
3.15 SAFETY VALVE
3.15.1 General
3.15.2 Safety valve discharge
3.15.3 Safety valve discharge piping
3.16 LOCATION OF CONTAINER COMPONENTS
3.17 COMPARTMENTS AND SUB-COMPARTMENTS
3.17.1 Internal containers
3.17.2 Construction
3.17.3 Ventilation
3.17.4 Conduits and ducts
3.18 MOUNTING OF FUEL CONTAINER
3.18.1 Correct orientation
3.18.2 Access to valves
3.18.3 Attachment to vehicle
3.18.4 Multiple containers
3.19 CONTAINER LOCATION, GROUND CLEARANCES
3.20 PROTECTION
3.21 HEAT SHIELDING
3.22 SUITABILITY FOR HAZARDOUS ZONES
SECTION 4 FUEL SERVICE LINE
4.1 APPLICATION
4.2 RIGID PIPING
4.2.1 General
4.2.2 Suitability of rigid piping
4.3 FLEXIBLE PIPING (HOSE AND HOSE ASSEMBLY)
4.4 JOINTS AND CONNECTIONS
4.5 INSTALLATION AND PROTECTION
4.6 PIPING OR FITTINGS IN ENCLOSED SPACES
4.7 MULTIPLE CONTAINER INSTALLATIONS
4.8 HYDROSTATIC RELIEF VALVE
4.9 TRAILERS AND SEMITRAILERS
4.10 PREVIOUSLY USED EQUIPMENT
4.11 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 100 kPa
SECTION 5 FUEL CONTROL EQUIPMENT
5.1 APPLICATION
5.2 FUEL FILTER
5.3 AUTOMATIC FUEL SHUT-OFF DEVICE AT REGULATOR
5.4 VAPORIZER
5.5 REGULATOR
5.6 INSTALLATION OF VAPORIZER AND REGULATOR
5.7 GAS-AIR MIXER
5.8 FUEL SELECTOR
5.8.1 General
5.8.2 Dual fuel change over system
5.8.3 Optional fuel type
5.8.4 Bypass relief device
5.8.5 Fuel selection control
5.9 PETROL SYSTEM MODIFICATIONS
5.10 ELECTRICAL WIRING
5.11 ENGINE MANAGEMENT SYSTEM
SECTION 6 INSPECTION TESTING AND COMMISSIONING
6.1 APPLICATION
6.2 USED EQUIPMENT
6.3 MODIFICATIONS AND REPAIRS
6.4 PRECAUTIONS
6.5 INSPECTION
6.6 LEAK DETECTION
6.7 CONTAINER SUB-ASSEMBLY LEAK TEST
6.7.1 General
6.7.2 Leak test
6.8 INSTALLATION TEST
6.8.1 General
6.8.2 Gastightness of compartments and sub-compartment
6.8.3 Leak testing of gas system
6.8.4 Test of automatic fill limiter
6.8.5 Test of fuel control device
6.8.6 Coolant system tests
6.8.7 Visual inspection
6.9 PERIODIC INSPECTION
6.9.1 General
6.9.2 System check
6.10 EXCESS FLOW VALVE TEST
6.11 NON-RETURN VALVE TEST
6.12 AUTOMATIC FILL LIMITER TEST
6.13 TESTING OF AUTOMATIC FUEL SHUT-OFF DEVICE
SECTION 7 CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
7.1 APPLICATION
7.2 CERTIFICATION
7.3 COMPLIANCE PLATE
7.4 LABELS AND MARKINGS
7.4.1 Filler markings
7.4.2 Outlet markings
7.4.3 Vehicle identification
7.4.4 Controls
7.4.5 Access hatch
7.5 OPERATING INSTRUCTIONS
APPENDIX A - LIST OF REFERENCED DOCUMENTS
APPENDIX B - REGULATING AGENCY INFORMATION
APPENDIX C - LEAK DETECTION METHODS
C1 SCOPE
C2 COMBUSTIBLE-GAS DETECTOR
C3 TRACE-GAS DETECTORS
C4 FOAMING AGENTS
C5 TOTAL IMMERSION
C6 VISUAL INSPECTION
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AS/NZS 1425:1999 LP GAS FUEL SYSTEMS FOR VEHICLE ENGINES
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION
1.1.1 Scope
1.1.2 Application
1.2 OBJECTIVE
1.3 REFERENCED DOCUMENTS
1.4 NEW DESIGNS AND INNOVATIONS
1.5 DEFINITIONS
1.5.1 Approved, approval
1.5.2 Authorized person
1.5.3 Authority
1.5.4 Automatic fill limiter
1.5.5 Automatic fuel shut-off device
1.5.6 Capacity (of a container)
1.5.7 Compartment
1.5.8 Container
1.5.9 Contents gauge
1.5.10 Double non-return valve
1.5.11 Excess-flow valve
1.5.12 Fixed liquid level gauge
1.5.13 Fuel filter
1.5.14 Fuel service line
1.5.15 Gas-air mixer
1.5.16 Hydrostatic relief valve
1.5.17 Ignition source
1.5.18 Internal (component)
1.5.19 Licensed installer
1.5.20 LP Gas
1.5.21 Maximum permitted filling level
1.5.22 May
1.5.23 Non return valve
1.5.24 POL coupling
1.5.25 Pressure
1.5.26 Professional engineer
1.5.27 Regulator
1.6 VEHICLE MODIFICATIONS
1.7 MINOR ALTERATIONS
1.8 ENGINE MANAGEMENT SYSTEM
1.9 APPROVED EQUIPMENT
1.10 PREVIOUSLY USED EQUIPMENT
1.11 LP GAS WITHDRAWAL FROM AUTOMOTIVE SYSTEMS
1.12 WORKING AREA AND SAFE PRACTICES
1.13 AGENCIES
SECTION 2 COMPONENTS
2.1 GENERAL SUITABILITY
2.1.1 General
2.1.2 Suitability for pressure
2.2 MOVING PARTS
2.3 SUITABILITY FOR INSTALLATION
2.4 MODIFICATION
2.5 METALS
2.6 NON-METALS
SECTION 3 CONTAINER SUB-ASSEMBLY
3.1 APPLICATION
3.2 CONTAINER
3.2.1 General
3.2.2 Use of removable containers
3.3 COMPONENTS FOR FIXED CONTAINERS
3.4 COMPONENTS FOR REMOVABLE CONTAINERS
3.5 COMPONENT SUITABILITY
3.6 FILLING CONNECTION
3.7 FILLER NON-RETURN VALVE SYSTEM
3.7.1 Direct filling system
3.7.2 Remote filling system
3.7.3 Internal non-return valve
3.7.4 Filler cap
3.7.5 Filling point location
3.8 AUTOMATIC FILL LIMITER (AFL)
3.8.1 Design
3.8.2 Performance
3.8.3 Durability
3.9 FIXED LIQUID LEVEL GAUGE
3.9.1 General
3.9.2 Gas-bleed type
3.9.3 Sight-glass type
3.10 CONTENTS GAUGE
3.11 EXCESS-FLOW VALVE
3.12 SERVICE VALVE
3.13 AUTOMATIC FUEL SHUT-OFF DEVICE AT CONTAINER
3.14 FUEL FILTER
3.15 SAFETY VALVE
3.15.1 General
3.15.2 Safety valve discharge
3.15.3 Safety valve discharge piping
3.16 LOCATION OF CONTAINER COMPONENTS
3.17 COMPARTMENTS AND SUB-COMPARTMENTS
3.17.1 Internal containers
3.17.2 Construction
3.17.3 Ventilation
3.17.4 Conduits and ducts
3.18 MOUNTING OF FUEL CONTAINER
3.18.1 Correct orientation
3.18.2 Access to valves
3.18.3 Attachment to vehicle
3.18.4 Multiple containers
3.19 CONTAINER LOCATION, GROUND CLEARANCES
3.20 PROTECTION
3.21 HEAT SHIELDING
3.22 SUITABILITY FOR HAZARDOUS ZONES
SECTION 4 FUEL SERVICE LINE
4.1 APPLICATION
4.2 RIGID PIPING
4.2.1 General
4.2.2 Suitability of rigid piping
4.3 FLEXIBLE PIPING (HOSE AND HOSE ASSEMBLY)
4.4 JOINTS AND CONNECTIONS
4.5 INSTALLATION AND PROTECTION
4.6 PIPING OR FITTINGS IN ENCLOSED SPACES
4.7 MULTIPLE CONTAINER INSTALLATIONS
4.8 HYDROSTATIC RELIEF VALVE
4.9 TRAILERS AND SEMITRAILERS
4.10 PREVIOUSLY USED EQUIPMENT
4.11 LP GAS FUEL PIPING FOR PRESSURE NOT EXCEEDING 100 kPa
SECTION 5 FUEL CONTROL EQUIPMENT
5.1 APPLICATION
5.2 FUEL FILTER
5.3 AUTOMATIC FUEL SHUT-OFF DEVICE AT REGULATOR
5.4 VAPORIZER
5.5 REGULATOR
5.6 INSTALLATION OF VAPORIZER AND REGULATOR
5.7 GAS-AIR MIXER
5.8 FUEL SELECTOR
5.8.1 General
5.8.2 Dual fuel change over system
5.8.3 Optional fuel type
5.8.4 Bypass relief device
5.8.5 Fuel selection control
5.9 PETROL SYSTEM MODIFICATIONS
5.10 ELECTRICAL WIRING
5.11 ENGINE MANAGEMENT SYSTEM
SECTION 6 INSPECTION TESTING AND COMMISSIONING
6.1 APPLICATION
6.2 USED EQUIPMENT
6.3 MODIFICATIONS AND REPAIRS
6.4 PRECAUTIONS
6.5 INSPECTION
6.6 LEAK DETECTION
6.7 CONTAINER SUB-ASSEMBLY LEAK TEST
6.7.1 General
6.7.2 Leak test
6.8 INSTALLATION TEST
6.8.1 General
6.8.2 Gastightness of compartments and sub-compartment
6.8.3 Leak testing of gas system
6.8.4 Test of automatic fill limiter
6.8.5 Test of fuel control device
6.8.6 Coolant system tests
6.8.7 Visual inspection
6.9 PERIODIC INSPECTION
6.9.1 General
6.9.2 System check
6.10 EXCESS FLOW VALVE TEST
6.11 NON-RETURN VALVE TEST
6.12 AUTOMATIC FILL LIMITER TEST
6.13 TESTING OF AUTOMATIC FUEL SHUT-OFF DEVICE
SECTION 7 CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
7.1 APPLICATION
7.2 CERTIFICATION
7.3 COMPLIANCE PLATE
7.4 LABELS AND MARKINGS
7.4.1 Filler markings
7.4.2 Outlet markings
7.4.3 Vehicle identification
7.4.4 Controls
7.4.5 Access hatch
7.5 OPERATING INSTRUCTIONS
APPENDIX A - LIST OF REFERENCED DOCUMENTS
APPENDIX B - REGULATING AGENCY INFORMATION
APPENDIX C - LEAK DETECTION METHODS
C1 SCOPE
C2 COMBUSTIBLE-GAS DETECTOR
C3 TRACE-GAS DETECTORS
C4 FOAMING AGENTS
C5 TOTAL IMMERSION
C6 VISUAL INSPECTION
Previous versions
AS/NZS 1425:1999
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.