INHALT

Regulation No 110 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of I. specific components of motor vehicles using compressed natural gas (CNG) in their propulsion system; — II. vehicles with regard to the installation of specific components of an approved type for the use of compressed natural gas (CNG) in their propulsion system

Regulation No 110 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of
1. SCOPE
2. DEFINITION AND CLASSIFICATION OF COMPONENTS
Figure 1-1
Flow scheme for CNG components classification
Figure 1-2
Tests applicable to specific classes of components (excluding cylinders)
2.16. Fuel lines
PART I
APPROVAL OF SPECIFIC COMPONENTS OF MOTOR VEHICLES USING COMPRESSED NATURAL GAS (CNG) IN THEIR PROPULSION SYSTEM
3. APPLICATION FOR APPROVAL
4. MARKINGS
5. APPROVAL
6. SPECIFICATIONS REGARDING CNG COMPONENTS
6.1. General provisions
6.2. Provisions regarding containers
6.3. Provisions regarding components fitted to the container
6.4.-6.11. Provisions regarding other components
7. MODIFICATIONS OF A TYPE OF CNG COMPONENT AND EXTENSION OF APPROVAL
8. (Not allocated)
9. CONFORMITY OF PRODUCTION
10. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
11. (Not allocated)
12. PRODUCTION DEFINITELY DISCONTINUED
13. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
PART II
APPROVAL OF VEHICLES WITH REGARD TO THE INSTALLATION OF SPECIFIC COMPONENTS OF AN APPROVED TYPE FOR THE USE OF COMPRESSED NATURAL GAS (CNG) IN THEIR PROPULSION SYSTEM
14. DEFINITIONS
15. APPLICATION FOR APPROVAL
16. APPROVAL
17. REQUIREMENTS FOR THE INSTALLATION OF SPECIFIC COMPONENTS FOR THE USE OF COMPRESSED NATURAL GAS IN THE PROPULSION SYSTEM OF A VEHICLE
17.1. General
17.2. Further requirements
17.3. The CNG system
17.4. Installation of the container
17.5. Accessories fitted to the container(s) or cylinder(s)
17.5.1. Automatic valve
17.5.2. Pressure relief device
17.5.3. Excess flow valve on the container
17.5.4. Manual valve
17.5.5. Gas-tight housing on the container(s)
17.5.6. PRD (pressure triggered)
17.6. Rigid and flexible fuel lines
17.7. Fitting or gas connections between the components
17.8. Automatic valve
17.9. Filling unit or receptacle
17.10. Fuel selection system and electrical installation
18. CONFORMITY OF PRODUCTION
19. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
20. MODIFICATION AND EXTENSION OF APPROVAL OF A VEHICLE TYPE
21. PRODUCTION DEFINITELY DISCONTINUED
22. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
ANNEX 1A
ESSENTIAL CHARACTERISTICS OF THE CNG COMPONENT
ANNEX 1B
ESSENTIAL CHARACTERISTICS OF THE VEHICLE, ENGINE AND CNG-RELATED SYSTEM
0. DESCRIPTION OF THE VEHICLE(S)
1. DESCRIPTION OF THE ENGINE(S)
1.2. Internal combustion engine
1.2.4.5.8. CNG container accessories:
1.2.4.5.17.1. Description of the CNG system
ANNEX 2A
ARRANGEMENT OF THE CNG COMPONENT TYPE-APPROVAL MARK
(See paragraph 5.2 of this Regulation)
ANNEX 2B
COMMUNICATION
(maximum format: A4 (210 × 297 mm))
Addendum
1. Additional information concerning the type-approval of a type of CNG components pursuant to Regulation No 110
1.1. Container(s) or cylinder(s)
1.2. Pressure indicator
1.3. Pressure relief valve (discharge valve)
1.4. Automatic valve(s)
1.5. Excess flow valve
1.6. Gas-tight housing
1.7. Pressure regulator(s)
1.8. Non-return valve(s) or non-return valve(s)
1.9. Pressure relief device (temperature triggered)
1.10. Manual valve
1.11. Flexible fuel lines
1.12. Filling unit or receptacle
1.13. Gas injector(s)
1.14. Gas flow adjuster
1.15. Gas/air mixer
1.16. Electronic control unit (CNG-fuelling)
1.17. Pressure and temperature sensor(s)
1.18. CNG filter(s)
1.19. PRD (pressure triggered)
ANNEX 2C
ARRANGEMENT OF APPROVAL MARKS
MODEL A
(See paragraph 16.2 of this Regulation)
MODEL B
(See paragraph 16.2 of this Regulation)
ANNEX 2D
COMMUNICATION
(maximum format: A4 (210 × 297 mm))
ANNEX 3
Gas cylinders
High-pressure cylinder for the on-board storage of natural gas as a fuel for automotive vehicles
1. SCOPE
2. REFERENCES
ASTM Standards(1)
BSI Standards(2)
ISO Standards(3)
NACE Standard(4)
3. DEFINITIONS
4. SERVICE CONDITIONS
4.1.
General
4.1.1. Standard service conditions
4.1.2. Use of cylinders
4.1.3. Service life
4.1.4. Periodic requalification
4.1.4.1. Cylinders involved in collisions
4.1.4.2. Cylinders involved in fires
4.2.
Maximum pressures
4.3.
Maximum number of filling cycles
4.4.
Temperature range
4.4.1. Settled gas temperature
4.4.2. Cylinder temperatures
4.4.3. Transient temperatures
4.5.
Gas composition
4.6.
External surfaces
4.7.
Gas permeation or leakage
5. DESIGN APPROVAL
5.1.
General
5.2.
Statement of service
5.3.
Design data
5.3.1. Drawings
5.3.2. Stress analysis report
5.3.3. Material test data
5.3.4. Design qualification test data
5.3.5. Fire protection
5.3.6. Cylinder supports
5.4.
Manufacturing data
5.5. (not allocated)
5.6.
Fracture performance and NDE defect size
5.6.1. Fracture performance
5.6.2. NDE defect size
5.7.
Specification sheet
5.8.
Additional supporting data
5.9.
Approval and certification
5.9.1. Inspection and testing
5.9.2. Test certificate
5.9.3. Batch acceptance certificate
6. REQUIREMENTS APPLICABLE TO ALL CYLINDER TYPES
6.1.
General
6.2.
Design
6.3.
Materials
6.3.2. Steel
6.3.2.1. Composition
6.3.2.2. Tensile properties
6.3.2.3. Impact properties
6.3.2.4. Bending properties
6.3.2.5. Macroscopic weld examination
6.3.2.6. Sulfide stress cracking resistance
6.3.3. Aluminium
6.3.3.1. Composition
6.3.3.2. Corrosion tests
6.3.3.3. Sustained load cracking
6.3.3.4. Tensile properties
6.3.4. Resins
6.3.4.1. General
6.3.4.2. Shear strength
6.3.4.3. Glass transition temperature
6.3.5. Fibres
6.3.6. Plastic liners
6.4.
Test pressure
6.5.
Burst pressures and fibre stress ratios
6.6.
Stress analysis
6.7.
Leak-before-break (LBB) assessment
6.8.
Inspection and testing
6.9.
Fire protection
6.10.
Openings
6.10.1. General
6.11.
Cylinder supports
6.12.
Exterior environmental protection
6.13.
Design qualification tests
6.14.
Batch tests
6.15.
Production examinations and tests
6.15.1. General
6.15.2. Maximum defect size
6.16.
Failure to meet test requirements
6.17.
Change of design
7. TYPE CNG-1 METAL CYLINDERS
7.1.
General
7.2.
Stress analysis
7.3.
Manufacturing and production test requirements
7.3.1. General
7.3.2. Non-destructive examination
7.3.3. Hydrostatic pressure testing
7.4.
Cylinder batch tests
7.5.
Cylinder design qualification tests
7.5.1. General
7.5.2. Hydrostatic pressure burst test
7.5.3. Ambient temperature pressure cycling test.
7.5.4. Bonfire test
7.5.5. Penetration test
7.5.6. LBB performance
8. TYPE CNG-2 HOOP-WRAPPED CYLINDERS
8.1.
General
8.2.
Design requirements
8.2.1. Metal liner
8.2.2. Composite over-wrap
8.2.3. Stress analysis
8.3.
Manufacturing requirements
8.3.1. General
8.3.2. Liner
8.3.3. Over-wrap
8.3.3.1. Curing of thermosetting resins
8.3.4. Auto-frettage
8.4.
Production test requirements
8.4.1. Non-destructive examination
8.4.2. Hydrostatic pressure testing
8.5.
Cylinder batch tests
8.5.1. General
8.6.
Cylinder design qualification tests
8.6.1. General
8.6.2. Hydrostatic pressure burst test
8.6.3. Ambient temperature pressure cycling test
8.6.4. Acid environment test
8.6.5. Bonfire test
8.6.6. Penetration test
8.6.7. Flaw tolerance tests
8.6.8. High temperature creep test
8.6.9. Accelerated stress rupture test
8.6.10. LBB performance
8.6.11. Extreme temperature pressure cycling test
9. TYPE CNG-3 FULLY-WRAPPED CYLINDERS
9.1.
General
9.2.
Design requirements
9.2.1. Metal liner
9.2.2. Composite over-wrap
9.2.3. Stress analysis
9.3.
Manufacturing requirements
9.4.
Production test requirements
9.5.
Cylinder batch tests
9.6.
Cylinder design qualification tests
9.6.1. Drop test
10. TYPE CNG-4 ALL-COMPOSITE CYLINDERS
10.1.
General
10.2.
Design requirements
10.3.
Stress analysis
10.4.
Manufacturing requirements
10.5.
Production test requirements
10.5.1. Hydrostatic pressure testing
10.5.2. Leak testing
10.6.
Cylinder batch tests
10.6.1. General
(a) Batch materials test
(b) Batch burst test
(c) Periodic pressure cycling test
10.7.
Cylinder design qualification tests
10.7.1. General
10.7.2. Boss torque test
10.7.3. Permeation test
10.7.4. Natural gas cycling test
11. MARKING
11.1.
Provision of marking
12. PREPARATION FOR DISPATCH
Appendix A
TEST METHODS
A.1. Tensile tests, steel and aluminium
A.2. Impact test, steel cylinders and steel liners
A.3. Sulphide stress cracking test for steel
A.4. Corrosion tests, aluminium
A.5. Sustained load cracking tests, aluminium
A.6. Leak-Before-Break (LBB) performance test
A.7. Extreme temperature pressure cycling
A.8. Brinell hardness test
A.9. Coating tests (mandatory if paragraph 6.12(c) of Annex 3 is used)
A.9.1. Coating performance tests
A.9.2. Coating batch tests
(i) Coating thickness
(ii) Coating adhesion
A.10. Leak test
A.11. Hydraulic test
Option 1: Water jacket test
Option 2: Proof pressure test
A.12. Hydrostatic pressure burst test
A.13. Ambient temperature pressure cycling
A.14. Acid environment test
A.15. Bonfire test
A.15.1. General
A.15.2. Cylinder set-up
A.15.3. Fire source
A.15.4. Temperature and pressure measurements
A.15.5. General test requirements
A.15.6. Cylinders 1,65 m length or less
A.15.7. Cylinders greater than 1,65 m length
A.15.8. Acceptable results
A.16. Penetration tests
A.17. Composite flaw tolerance tests
A.18. High temperature creep test
A.19. Accelerated stress rupture test
A.20. Impact damage test
A.21. Permeation test
A.22. Tensile properties of plastics
A.23. Melting temperature of plastics
A.24. Pressure relief device requirements
A.25. Boss torque test
A.26. Resin shear strength
A.27. Natural gas cycling test
A.28. Bend test, welded stainless steel liners
Appendix B
Appendix C
Appendix D
REPORT FORMS
Form 1: Report of Manufacturer and Certification of Conformance
Appendix E
VERIFICATION OF STRESS RATIOS USING STRAIN GAUGES
4. Method 1 (applies to cylinders that do not use high tension winding)
5. Method 2 (applies to all cylinders)
Appendix F
FRACTURE PERFORMANCE METHODS
F.1. Determination of fatigue sensitive sites
F.2. Leak-Before-Break (LBB)
F.2.1. Engineering critical assessment
F.2.2. LBB by flawed cylinder burst
(a) Determination of leak-before-break flaw length
(b) Cylinder flaws
(c) Test procedure
(d) Acceptance criteria for the flawed cylinder test
F.3. Defect size for non-destructive examination (NDE)
F.3.1. NDE Defect size by engineering critical assessment
F.3.2. NDE Defect size by flawed cylinder cycling
Appendix G
Instructions by the container manufacturer regarding handling, use and inspection of cylinders
G.1. General
G.2. Distribution
G.3. Reference to existing codes, standards and regulations
G.4. Cylinder handling
G.5. Installation
G.6. Use of cylinders
G.7. In-service inspection
Appendix H
ENVIRONMENTAL TEST
H.1. Scope
H.2. Summary of test method
H.3. Cylinder set-up and preparation
Figure H.1
Cylinder orientation and layout of exposure areas
H.4. Preconditioning apparatus
(a) Pendulum impact
(b) Gravel impact
(c) Gravel
Figure H.2
Gravel impact test
H.5. Exposure environments
(a) Immersion environment
(b) Other fluid exposure
H.6. Test conditions
(a) Pressure cycle
(b) Pressure during other fluid exposure
(c) High and low temperature exposure
H.7. Test procedure
(a) Preconditioning of the cylinder
(b) Test sequence and cycles
H.8. Acceptable results
ANNEX 4A
Provisions regarding the approval of the automatic valve, non-return valve, pressure relief valve, pressure relief device (temperature triggered), excess flow valve, manual valve and the pressure relief device (pressure triggered)
2. The automatic valve
2.2. Operating specifications
3. The non-return valve
3.2. Operating specifications
4. The pressure relief valve and pressure relief device
4.2. Operating specifications
5. The excess flow valve
5.2. Operating specifications
6. The manual valve
6.3. Manual valve device requirements
7. Pressure relief device (pressure triggered)
7.2. Operating specifications
7.4. PRD (pressure triggered) requirements.
7.4.1. Continued operation
7.4.1.1. Test procedure
7.4.1.2. Requirements
7.4.2. Corrosion resistance test
7.4.2.1. Test procedure
7.4.2.2. Requirements
ANNEX 4B
PROVISIONS REGARDING THE APPROVAL OF FLEXIBLE FUEL LINES OR HOSES
Scope
1. HIGH PRESSURE HOSES, CLASS 0 CLASSIFICATION
1.1. General specifications
1.2. Hose construction
1.3. Specifications and tests for the lining
1.3.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
1.4. Specifications and test-method for the cover
1.4.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
1.4.3. Resistance to ozone
1.5. Specifications for uncoupled hose
1.5.1. Gas-tightness (permeability)
1.5.2. Resistance at low temperature
1.5.3. Bending test
Figure 1 (example only)
1.5.4. Hydraulic-test-pressure and appointment of the minimum burst-pressure
1.6. Couplings
1.7. Assembly of hose and couplings
1.7.3. Gas-tightness
1.8. Markings
2. MEDIUM PRESSURE HOSES, CLASS 1 CLASSIFICATION
2.1. General specifications
2.2. Hose construction
2.3. Specifications and tests for the lining
2.3.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
2.4. Specifications and test-method for the cover
2.4.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
2.4.3. Resistance to ozone
2.5. Specifications for uncoupled hose
2.5.1. Gas-tightness (permeability)
2.5.2. Resistance at low temperature
2.5.3. Bending test
Figure 2 (example only)
2.5.4. Hydraulic-test-pressure
2.6. Couplings
2.7. Assembly of hose and couplings
2.7.3. Gas-tightness
2.8. Markings
3. LOW PRESSURE HOSES, CLASS 2 CLASSIFICATION
3.1. General specifications
3.2. (Not allocated)
3.3. Specifications and tests for the lining
3.3.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
3.4. Specifications and test-method for the cover
3.4.1. Tensile strength and elongation for rubber material and for thermoplastic elastomers (TPE)
3.4.3. Resistance to ozone
3.5. Specifications for uncoupled hose
3.5.1. Gas-tightness (permeability)
3.5.2. Resistance at low temperature
3.5.3. Resistance at high temperature
3.5.4. Bending test
Figure 3 (example only)
3.6. Markings
ANNEX 4C
PROVISIONS REGARDING THE APPROVAL OF THE CNG FILTER
2. Operating conditions
ANNEX 4D
PROVISIONS REGARDING THE APPROVAL OF THE PRESSURE REGULATOR
2. Pressure regulator
3. Classification and test pressures
ANNEX 4E
Provisions regarding the approval of the pressure and temperature sensors
2. Pressure and temperature sensors
3. Classification and test pressures
ANNEX 4F
PROVISIONS REGARDING THE APPROVAL OF THE FILLING UNIT (RECEPTACLE)
1. Scope
2. The filling unit
3. The filling unit test procedures
4. Filling unit dimensions
Figure 1
20 MPa filling unit (receptacle) for M
1
and N
1
vehicles
Figure 2
20 MPa filling unit size 2 (receptacle) for M
2
, M
3
, N
2
and N
3
vehicles
ANNEX 4G
Provisions regarding the approval of gas flow adjuster and gas/air mixer or gas injector
2. Gas/air mixer or gas injector
2.3. Test pressures
3. Gas flow adjuster
3.3. Test pressures
ANNEX 4H
PROVISIONS REGARDING THE APPROVAL OF THE ELECTRONIC CONTROL UNIT
2. Electronic control unit
ANNEX 5
TEST PROCEDURES
1. CLASSIFICATION
2. APPLICABLE TEST PROCEDURES
3. GENERAL REQUIREMENTS
ANNEX 5A
OVER PRESSURE TEST (STRENGTH TEST)
ANNEX 5B
EXTERNAL LEAKAGE TEST
5. High temperature test
6. Low temperature test
ANNEX 5C
INTERNAL LEAKAGE TEST
ANNEX 5D
CNG COMPATIBILITY TEST
ANNEX 5E
CORROSION RESISTANCE TEST
ANNEX 5F
RESISTANCE TO DRY HEAT
ANNEX 5G
OZONE AGEING
ANNEX 5H
TEMPERATURE CYCLE TEST
ANNEX 5I
PRESSURE CYCLE TEST APPLICABLE ONLY TO CYLINDERS (SEE ANNEX 3)
ANNEXES 5J AND 5K
ANNEX 5L
DURABILITY TEST (CONTINUED OPERATION)
Test method
(a) Room temperature cycling
(b) High temperature cycling
(c) Low temperature cycling
ANNEX 5M
BURST/DESTRUCTIVE TEST APPLICABLE ONLY TO CYLINDERS (SEE ANNEX 3)
ANNEX 5N
VIBRATION RESISTANCE TEST
Test method
ANNEX 5O
ANNEX 6
Provisions regarding CNG identification mark for public service vehicles