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BS EN 13423:2021

BS EN 13423:2021

$167.15

Natural gas vehicles. Requirements for NGV workshops and the management of compressed natural gas (CNG) vehicles

Published By Publication Date Number of Pages
BSI 2021 34
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This document provides requirements for operation of vehicles that use compressed natural gas (CNG) as a fuel for propulsion, covering various aspects of NGV workshops including activities, risk management, planning, personnel, layout, systems and operations. It provides requirements regarding the management of NGVs including use, parking, fuelling for commissioning, inspection, installation, repair and maintenance, disposal, transportation and documentation.

This document is applicable to the management of CNG vehicles with a fuel system pressure of 20 MPa (200 bar) at 15 °C. This document can also be applied to vehicles with higher fuel system pressures, taking into account additional safety aspects.

This document also applies to servicing, repair and maintenance of NGVs when work is not performed on the gas fuel system.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
12 4 General provisions
13 5 NGV workshop activities
6 NGV workshop risk management
6.1 Procedure
6.2 Risk context
14 6.3 Risk assessment
6.4 Risk treatment
6.5 Risk monitoring and review
6.6 Risk documentation
7 NGV workshop planning
7.1 Tools and equipment
15 7.2 Security measures
7.3 Emergency planning
7.3.1 Emergency procedures
7.3.2 Emergency access and escape
7.3.3 Emergency equipment
8 NGV workshop occupants
8.1 General safety
8.2 NGV workshop mechanics/technicians
8.3 Training
16 8.4 Qualification
9 NGV workshop layout
9.1 Designated areas
9.2 Marking of areas
9.3 Hazardous areas
9.4 Warning signs and notices
9.5 General atmosphere
17 9.6 Increased hazards
10 NGV workshop systems
10.1 Air compressor system
10.2 Fire protection system
10.2.1 General
10.2.2 Fire walls
18 10.3 Gas detection system
10.3.1 General
10.3.2 Personal gas monitors
10.4 Heat and lighting system
10.5 Measurement system
10.6 Mechanical ventilation system
11 NGV workshop operations
11.1 Documentation
11.1.1 Written procedures
11.1.2 Record keeping
19 11.2 Gas leak management
11.2.1 Reporting of gas leak
11.2.2 Handling NGVs with gas leaks
11.2.3 Isolation of cylinders
20 Annex A (normative)Management of NGVs
A.1 Use
A.2 Parking
A.3 Inspection
A.3.1 Routine assessment
A.3.2 Unplanned assessment
A.4 Installation, repair and maintenance
A.4.1 General
A.4.1.1 CNG system and components
21 A.4.1.2 Dealing with nonconformity
A.4.2 Preventative measures
A.4.2.1 Overheating
A.4.2.2 Uncontrolled release of gas
A.4.3 Prior to work
A.4.3.1 CNG system isolation
22 A.4.3.2 CNG system depressurization
A.4.4 During work
A.4.4.1 Qualified person and conformity assessment
A.4.4.2 Part replacement
A.4.4.3 Operation instructions
A.4.5 After work
A.4.5.1 Gas-free interior testing
A.4.5.2 Leak-testing
23 A.5 Disposal
A.5.1 Decommissioning
A.5.2 Scrapping
A.5.3 Resale
A.6 Transportation
A.7 Documentation
24 Annex B (normative)Management of cylinders
B.1 Use
B.1.1 Service conditions
B.1.2 Installation instructions
B.2 Handling
B.2.1 Unacceptable damage
B.2.2 Hot work
B.3 Inspection
B.3.1 Inspection interval
B.3.2 Procedure
B.3.3 Revalidation
25 B.3.4 Rejection
B.4 Storage
B.4.1 General
B.4.2 Hazardous condition
B.4.3 Safe condition
B.5 Depressurization
B.5.1 Cases
26 B.5.2 Procedure
B.5.3 Tasks of the qualified person
B.5.4 Flaring
B.5.4.1 Procedure
B.5.4.2 Restrictions
B.6 Removal
B.6.1 Replacement
B.6.2 Removal of CNG
27 B.7 Maintenance
B.8 Mounting
B.8.1 Specified case
B.8.2 Unspecified case
B.9 Gas-freeing
B.10 Disposal
28 Annex C (informative)Natural gas characteristics
C.1 Information in manual
C.2 Composition of natural gas
C.3 Production of CNG
C.4 Hazards
C.4.1 Toxicity
29 C.4.2 Explosion danger
C.4.3 Dispersion
C.4.4 Compressibility of the gas
C.4.5 Corrosion in relation to CNG
30 Annex D (informative)NGV workshop tools and equipment
D.1 Complementary tools
D.2 Measurement tools

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BS EN 13423:2021
$167.15