AS/NZS 1425:2007

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

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.

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.

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.