I.S. 808:2002
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
SPECIFICATION FOR CNG FUELLED VEHICLES
Hardcopy , PDF
31-10-2019
English
01-01-2002
Declaration
Foreword
1 Scope
2 References
3 Terms and definitions
4 Specific requirements
4.1 General
4.2 CNG system
4.3 Design
4.3.1 General
4.3.2 Vehicle modifications
4.4 Filling stations
4.5 Heat shielding
4.6 Gas quality
4.7 Vehicle hand-over and documentation
5 Cylinders
5.1 Design and specification of cylinder and cylinder
valve assembly
5.1.1 Cylinder valve
5.1.2 Pressure relief device
5.1.3 Excess flow valve
5.1.4 Cylinder markings
5.1.5 Surface treatment
5.2 Cylinder installation
5.2.1 Cylinder weight
5.2.2 Attachment to vehicle
5.2.3 Location
5.2.4 Shielding
5.2.5 Enclosure and venting to atmosphere of
internal cylinders
5.3 Cylinder inspection and revalidation
5.3.1 Cylinder inspection
6 CNG fuel line
6.1 Fuel line subject to cylinder pressure
6.2 Fuel line size
6.3 Joints and connection
6.4 Securing and location
6.5 CNG fuel line subject to pressure not exceeding
100 kPa
6.6 Flexibility
6.7 Hose renewal
7 Engine and fuel control systems
7.1 General
7.2 CNG control equipment
7.2.1 CNG service shut-off valve
7.2.2 Filter
7.2.3 CNG automatic shut-off valve
7.2.4 Regulator system
7.2.5 Gas/air mixer
7.2.6 Gas injector
7.3 Fuel selector
7.4 Interface with petrol system
7.4.1 General
7.4.2 Electronic ignition modifier
7.4.3 Carburettor systems
7.5 Installation
7.5.1 General
7.5.2 Electrical wiring
7.6 Inertia switch
7.7 CNG fuel contents indicator
8 Filling equipment
8.1 Maximum filling pressure
8.2 Filling connection
8.3 Position of filling receptacle
8.4 Filler non-return valve
9 Garaging and repair
9.1 General
9.2 Scrapping
10 Labels and identification plates
11 Inspection, testing and commissioning
11.1 General
11.2 Initial inspection and testing
11.2.1 General
11.2.2 Leak testing (see annex G)
11.2.3 Installation certificate
11.3 Periodic inspection and testing
11.3.1 Inspection
11.3.2 Periodic leak test
11.3.3 CNG system component test
11.4 Records
12 Components
12.1 Application
12.2 Strength and durability
12.2.1 Design pressure
12.2.2 Moving parts
12.2.3 Suitability for installation
12.3 Materials
12.3.1 Metals
12.3.2 Non-metals
12.4 Filler non-return valve system (check valves)
12.5 Filling interlock device
12.6 Filling receptacle
12.7 Regulator
12.8 CNG automatic shut-off valve
12.9 CNG service shut-off valve
12.10 Fuel selector
12.11 Pressure measurement device
12.12 CNG fuel contents indicator
12.13 Gas/air mixer
12.14 Gas injector
12.15 CNG fuel line
12.15.1 High pressure tubing and fittings
12.15.2 Low pressure tubing and connections
12.16 Inertia switch
12.17 Filter
12.18 CNG system electrical equipment and associated
wiring
12.19 CNG cylinder
12.20 Cylinder valve
12.21 Pressure relief device
12.22 Excess flow valve
12.23 Cylinder compartments and sub-compartments
Annex A (informative) Definitions of vehicle categories
and zones of clearance (extract from directive
70/156)
A.1 International classification of vehicle categories
Annex B (normative) Identification marking label
Annex C (informative) Example of CNG vehicle installation
certificate
Annex D (normative) CNG vehicle initial inspection checklist
Annex E (informative) CNG Vehicle Periodic Inspection Checklist
Annex F (informative) Compressed Natural Gas - Characteristics
and safety aspects
Annex G (informative) Leak detection methods
Annex H (informative) Component layout
Annex I (informative) Recommended vehicle instruction manual
content
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