AS 4983-2003

1 - AS 4983:2003 GAS FUEL SYSTEMS FOR FORKLIFTS AND INDUSTRIAL 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
9 - 1.5 DEFINITIONS
9 - 1.5.1 Approved, approval
9 - 1.5.2 Authorized person
9 - 1.5.3 Authority
9 - 1.5.4 Automatic fill limiter (LP Gas)
9 - 1.5.5 Automatic fuel shut-off device
9 - 1.5.6 Capacity (of a container)
9 - 1.5.7 Closed-loop system
9 - 1.5.8 Compartment
9 - 1.5.9 CNG (Compressed natural gas)
9 - 1.5.10 Container (LP Gas)
9 - 1.5.11 Contents gauge
10 - 1.5.12 Cylinder (CNG)
10 - 1.5.13 Double non-return valve
10 - 1.5.14 Excess-flow valve
10 - 1.5.15 Fill line
10 - 1.5.16 Fixed liquid level gauge
10 - 1.5.17 Fuel filter
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 Manifold
11 - 1.5.26 Maximum permitted filling level
11 - 1.5.27 May
11 - 1.5.28 NGV
11 - 1.5.29 Non return valve
11 - 1.5.30 POL coupling
11 - 1.5.31 Pressure
11 - 1.5.32 Pressure relief device (CNG)
11 - 1.5.33 Professional engineer
11 - 1.5.34 Rated working pressure
11 - 1.5.35 Regulator
12 - 1.5.36 Relief device (LP Gas)
12 - 1.5.37 Removable container
12 - 1.5.38 Safety coupling
12 - 1.5.39 Safety valve (PRV-Pressure Relief Valve)
12 - 1.5.40 Service valve
12 - 1.5.41 Shall
12 - 1.5.42 Should
12 - 1.5.43 Sub-compartment
12 - 1.5.44 Vaporizer (Converter)
12 - 1.6 INDUSTRIAL EQUIPMENT MODIFICATIONS
13 - 1.7 MINOR ALTERATIONS
13 - 1.8 ENGINE MANAGEMENT SYSTEM
13 - 1.9 USE OF EQUIPMENT IN ENCLOSED SPACES
13 - 1.10 PREVIOUSLY USED COMPONENTS AND MATERIALS
14 - 1.11 GAS OR LIQUID FUEL WITHDRAWAL FROM INDUSTRIAL EQUIPMENT SYSTEMS
14 - 1.12 WORKING AREA AND SAFE PRACTICES
14 - 1.13 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
15 - 2.4 MODIFICATION
15 - 2.5 METALS
16 - 2.6 NON-METALS
17 - SECTION 3 - LP GAS CONTAINER, COMPONENTS AND FILLING SYSTEMS
17 - 3.1 SCOPE OF SECTION
17 - 3.2 CONTAINER
17 - 3.3 COMPONENTS FOR REMOVABLE CONTAINERS
17 - 3.4 COMPONENTS FOR FIXED CONTAINERS
18 - 3.5 COMPONENT SUITABILITY
18 - 3.6 FILLING CONNECTION
18 - 3.7 FILLER 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
20 - 3.9 FIXED LIQUID LEVEL GAUGE
21 - 3.10 CONTENTS GAUGE
21 - 3.11 EXCESS-FLOW VALVE
21 - 3.12 SERVICE VALVE
21 - 3.13 AUTOMATIC FUEL SHUT-OFF DEVICE FOR FIXED CONTAINER
21 - 3.13.1 General
22 - 3.13.2 Fuel filter
22 - 3.14 SUITABILITY FOR HAZARDOUS ZONES
22 - 3.15 SAFETY VALVE
22 - 3.15.1 General
22 - 3.15.2 Safety valve discharge
22 - 3.16 LOCATION OF CONTAINER COMPONENTS
23 - 3.17 COMPARTMENTS AND SUB-COMPARTMENTS
23 - 3.17.1 Internal containers
23 - 3.17.2 Construction
23 - 3.17.3 Ventilation
24 - 3.17.4 Conduits and ducts
25 - 3.18 MOUNTING OF FUEL CONTAINER
25 - 3.18.1 Correct orientation
25 - 3.18.2 Access to valves
25 - 3.18.3 Attachment to industrial equipment
27 - 3.18.4 Alternate considerations
29 - 3.18.5 Multiple containers
29 - 3.19 CONTAINER LOCATION
30 - 3.20 PROTECTION
30 - 3.21 HEAT SHIELDING
32 - SECTION 4 - CNG CYLINDER, COMPONENTS AND FILLING SYSTEMS
32 - 4.1 SCOPE OF SECTION
32 - 4.2 FUEL SUPPLY SYSTEM COMPONENTS
32 - 4.2.1 Components
32 - 4.2.2 Use of combined components
32 - 4.3 CYLINDER
32 - 4.3.1 General
32 - 4.3.2 Cylinder painting
32 - 4.4 CYLINDER VALVE(S)
32 - 4.4.1 Cylinder valve
33 - 4.4.2 Automatic fuel shut-off device of cylinder
33 - 4.5 REFUELLING CONNECTION
33 - 4.5.1 Design of connection
33 - 4.5.2 Dust cap
34 - 4.6 REFUELLING NON-RETURN VALVE
34 - 4.7 LOCATION OF REFUELLING CONNECTION
34 - 4.8 CYLINDER COMPARTMENTS AND SUB-COMPARTMENTS
34 - 4.8.1 Internal cylinders
34 - 4.8.2 Safety device discharge
34 - 4.8.3 Construction
35 - 4.8.4 Ventilation
36 - 4.8.5 Conduits
37 - 4.9 MOUNTING OF CYLINDER
37 - 4.9.1 Access to valves
37 - 4.9.2 Attachment to forklift or mobile industrial equipment
38 - 4.9.3 Alternate considerations
39 - 4.10 CYLINDER LOCATION AND GROUND CLEARANCES
39 - 4.11 PROTECTION
40 - 4.12 HEAT SHIELDING
41 - SECTION 5 - LP GAS AND CNG FUEL SERVICE LINE
41 - 5.1 SCOPE OF SECTION
41 - 5.2 RIGID PIPING
41 - 5.2.1 General
41 - 5.2.2 Suitability of rigid piping
41 - 5.3 FLEXIBLE PIPING (HOSE AND HOSE ASSEMBLY)
42 - 5.4 JOINTS AND CONNECTIONS
42 - 5.5 INSTALLATION AND PROTECTION
43 - 5.6 PIPING OR FITTINGS IN ENCLOSED OPERATOR CABINS
43 - 5.7 MULTIPLE LP GAS CONTAINER INSTALLATIONS
43 - 5.8 HYDROSTATIC RELIEF VALVE (LP GAS)
43 - 5.9 LP GAS AND CNG FUEL PIPING FOR PRESSURE NOT EXCEEDING 100 kPa
45 - SECTION 6 - FUEL CONTROL EQUIPMENT
45 - 6.1 SCOPE OF SECTION
45 - 6.2 FUEL FILTER
45 - 6.3 LP GAS VAPORIZER AUTOMATIC FUEL SHUT-OFF DEVICE
46 - 6.4 AUTOMATIC FUEL SHUT-OFF DEVICE FOR CNG SYSTEMS
46 - 6.5 LP GAS VAPORIZER/REGULATOR
46 - 6.6 REGULATING SYSTEMS
46 - 6.7 INSTALLATION OF LP GAS VAPORIZER OR REGULATOR
46 - 6.8 FUEL METERING SYSTEM
47 - 6.9 FUEL SELECTION
47 - 6.9.1 General
47 - 6.9.2 Fuel changeover system
47 - 6.9.3 Optional fuel type
48 - 6.10 PETROL SYSTEM MODIFICATIONS
48 - 6.11 ELECTRICAL WIRING
48 - 6.12 ENGINE MANAGEMENT SYSTEM
48 - 6.13 CONTENTS INDICATOR
49 - SECTION 7 - INSPECTION TESTING AND COMMISSIONING
49 - 7.1 SCOPE OF SECTION
49 - 7.2 USED COMPONENTS
49 - 7.3 MODIFICATIONS AND REPAIRS
49 - 7.4 PRECAUTIONS
50 - 7.5 INSPECTION
50 - 7.6 LEAK DETECTION
50 - 7.7 FIXED LP GAS CONTAINER ASSEMBLY LEAK TEST
50 - 7.7.1 General
50 - 7.7.2 Leak test
51 - 7.8 INSTALLATION TEST
51 - 7.8.1 General
51 - 7.8.2 Gastightness of compartment and sub-compartment
51 - 7.8.3 Leak testing of gas system
52 - 7.8.4 Test of automatic fill limiter on fixed LP Gas container installations
52 - 7.8.5 Test of fuel control device
52 - 7.8.6 Coolant system tests
52 - 7.8.7 Visual inspection
52 - 7.9 ANNUAL INSPECTION AND TESTS
52 - 7.9.1 General
52 - 7.9.2 System check
55 - 7.10 EXCESS FLOW VALVE TEST (LP GAS)
55 - 7.11 NON-RETURN VALVE TEST
55 - 7.12 AUTOMATIC FILL LIMITER (AFL) TEST FOR LP GAS INSTALLATIONS
56 - SECTION 8 - CERTIFICATION, COMPLIANCE PLATE, MARKINGS AND LABELS
56 - 8.1 GENERAL REQUIREMENT
56 - 8.2 CERTIFICATION
56 - 8.3 INFORMATION PLATES
56 - 8.3.1 Compliance plates
56 - 8.3.2 Information plate for removable LP Gas container
57 - 8.3.3 CNG cylinder information plate
57 - 8.4 LABELS AND MARKINGS
57 - 8.4.1 Filler markings for LP Gas installations
57 - 8.4.2 Outlet markings for LP Gas installations
58 - 8.4.3 Mobile industrial equipment identification
58 - 8.4.4 Access hatch
58 - 8.4.5 Selector
58 - 8.5 OPERATING INSTRUCTIONS
59 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
61 - APPENDIX B - REGULATING AGENCY INFORMATION
64 - APPENDIX C - LEAK DETECTION METHODS
64 - C1 SCOPE
64 - C2 COMBUSTIBLE-GAS DETECTOR
64 - C3 TRACE-GAS DETECTORS
64 - C4 FOAMING AGENTS
65 - C5 TOTAL IMMERSION
65 - C6 VISUAL INSPECTION (LP GAS)

Sets out requirements for liquefied petroleum gas (LPG) and compressed natural gas (CNG) fuel systems for engines mounted on industrial equipment, either for the propulsion of the equipment or for driving some auxiliary function.

First published as AS 4983-2003.