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AS 4983-2010


Gas fuel systems for forklifts and industrial engines

Specifies requirements for liquefied petroleum gas (LP Gas) and compressed natural gas (CNG) fuel systems for engines mounted on industrial equipment.
Published: 08/01/2010
Pages: 59
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Table of contents
Cited references
Content history
Table of contents
About this publication
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
1.6 Industrial equipment modifications
1.7 Minor alterations
1.8 Engine management system
1.9 Use of equipment in enclosed spaces
1.10 Previously used components and materials
1.11 Gas or liquid fuel withdrawal from industrial equipment systems
1.12 Working area and safe practices
1.13 Regulatory agencies
2 Components
2.1 General suitability
2.1.1 General
2.1.2 Suitability for pressure LP Gas CNG
2.2 Moving parts
2.3 Suitability for installation
2.4 Modification
2.5 Metals for LP Gas components
2.6 Non-metals for LP Gas components
3 LP Gas container, components and filling systems
3.1 Scope of section
3.2 Container
3.3 Components for removable containers
3.4 Components for fixed containers
3.5 Component suitability
3.6 Filling connection
3.7 Filler system
3.7.1 Direct filling system
3.7.2 Remote filling system Filling connection Fill line
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
3.10 Contents gauge
3.11 Excess-flow valve
3.12 Service valve
3.13 Automatic fuel shut-off device for fixed container
3.13.1 General
3.13.2 Fuel filter
3.14 Suitability for hazardous zones
3.15 Safety valve
3.15.1 General
3.15.2 Safety valve discharge
3.16 Location of container components
3.17 Compartments and sub-compartments
3.17.1 Removable containers
3.17.2 Internal containers
3.17.3 Construction
3.17.4 Ventilation
3.17.5 Conduits and ducts
3.18 Mounting of fuel container
3.18.1 Correct orientation
3.18.2 Access to valves
3.18.3 Fixed industrial engines
3.18.4 Attachment to mobile industrial equipment
3.18.5 Alternate considerations General Attachment to sheet metal structure Attachment to forklift counterweights Attachment to non-integral and non-metallic panels Attachment to roof of forklifts or industrial equipment
3.18.6 Multiple containers
3.19 Container location
3.20 Protection
3.21 Heat shielding
4 CNG container, components and filling systems
4.1 Scope of section
4.2 Fuel supply system components
4.2.1 Components
4.2.2 Component parts
4.2.3 Use of combined components
4.3 Container
4.3.1 General
4.3.2 Container identity and type
4.3.3 Container painting
4.4 Container valve(s)
4.4.1 Container valve
4.4.2 Automatic fuel shut-off device at container
4.5 Refuelling connection
4.5.1 Design of connection
4.5.2 Dust cap
4.6 Refuelling non-return valve
4.7 Location of refuelling receptacle
4.8 Container compartments and sub-compartments
4.8.1 Internal containers
4.8.2 Pressure relief device
4.8.3 Construction
4.8.4 Ventilation
4.8.5 Conduits
4.9 Mounting of container
4.9.1 Access to valves
4.9.2 Fixed industrial engines
4.9.3 Attachment to forklift or mobile industrial equipment
4.9.4 Alternate considerations
4.10 Container location and ground clearances
4.11 Protection
4.12 Heat shielding
5 LP Gas and CNG fuel service lines
5.1 Scope of section
5.2 Rigid piping
5.2.1 General
5.2.2 Suitability of rigid piping
5.3 Flexible piping (hose and hose assembly)
5.4 Joints and connections
5.5 Installation and protection
5.6 Piping or fittings in enclosed operator cabins
5.7 Multiple LP Gas container installations
5.8 Hydrostatic relief valve (LP Gas)
5.9 LP Gas fuel hoses for pressure not exceeding 450 kPa
6 Fuel control equipment
6.1 Scope of section
6.2 Fuel filter
6.3 Automatic fuel shut-off device at LP Gas regulator
6.4 Automatic fuel shut-off device for CNG systems
6.5 LP Gas or CNG vaporiser/regulator
6.6 Regulating systems
6.7 Installation of LP Gas vaporiser or regulator
6.8 Fuel metering system
6.9 Fuel selection
6.9.1 General
6.9.2 Fuel changeover system
6.9.3 Optional fuel type Shut-off device Bypass relief device Fuel selection control
6.10 Petrol system modifications
6.11 Electrical wiring
6.12 Minimizing risk of gas ignition
6.13 Engine management system
6.14 Contents indicator
7 Inspection, testing and commissioning
7.1 Scope of section
7.2 Used components
7.3 Modifications and repairs
7.4 Precautions
7.5 Inspection
7.6 Leak detection
7.7 Fixed LP Gas container assembly leak test
7.7.1 General
7.7.2 Leak test
7.8 Installation test
7.8.1 General
7.8.2 Gastightness of compartment and sub-compartment
7.8.3 Leak testing of gas system
7.8.4 Test of automatic fill limiter on fixed LP Gas container installations
7.8.5 Test of fuel control device
7.8.6 Coolant system tests
7.8.7 Visual inspection
7.9 Annual inspection and tests
7.9.1 General
7.9.2 Annual system check
7.10 Excess flow valve test (LP Gas)
7.11 Non-return valve test
7.12 Automatic Fill Limiter (AFL) test for LP Gas installations
7.13 Testing of automatic fuel shut-off device
7.14 CNG containers
8 Certification, compliance plate, markings and labels
8.1 General requirement
8.2 Certification
8.3 Information plates
8.3.1 Compliance plates
8.3.2 Information plate for removable LP Gas container
8.3.3 CNG refuelling information plate
8.4 Labels and markings
8.4.1 Filler markings for LP Gas installations
8.4.2 Outlet markings for LP Gas installations
8.4.3 Mobile industrial equipment identification
8.4.4 Access hatch
8.4.5 Selector
8.5 Operating instructions
Appendix A
Appendix B
Appendix C
C1 Scope
C2 Combustible-gas detector
C3 Trace-gas detectors
C4 Foaming agents
C5 Total immersion
C6 Visual inspection (LP Gas)
Cited references in this standard
Content history
DR 09040