prEN 17932

Natural gas vehicles - Requirements for LNGV workshops and the management of liquefied natural gas (LNG) vehicles

This document provides requirements for operation of vehicles that use liquefied natural gas (LNG) as a fuel for propulsion, covering various aspects of LNGV workshops including activities, risk management, planning, personnel, layout, systems and operations. It provides requirements regarding the management of LNGV including use, parking, fuelling for commissioning, inspection, installation, repair and maintenance, disposal, transportation and documentation.
This document is applicable to the management of LNG vehicles.

Erdgasfahrzeuge - Anforderungen an Werkstätten und das Management von mit LNG betriebenen Fahrzeugen

Dieses Dokument enthält Anforderungen zum Betrieb von Fahrzeugen, die verflüssigtes Erdgas (LNG) als Kraftstoff für den Antrieb verwenden, und behandelt hierbei verschiedene Aspekte einschließlich Tätigkeiten, Risikomanagement, Planung, Personal, Aufbau, Systeme sowie Betrieb von Werkstätten für LNG-Fahrzeuge. Es enthält Anforderungen an die Handhabung von LNG-Fahrzeugen, einschließlich Gebrauch, Parken, Betankung für die Inbetriebnahme, Inspektion, Installation, Reparatur und Wartung, Entsorgung, Transport und Dokumentation.
Dieses Dokument gilt für die Handhabung von LNG-Fahrzeugen.

Exploitation de véhicules fonctionnant au gaz naturel - Exigences relatives aux ateliers pour véhicules GNL et à la gestion des véhicules fonctionnant au gaz naturel liquéfié (GNL)

Le présent document fournit des exigences relatives à l'utilisation des véhicules fonctionnant au gaz naturel liquéfié (GNL) en tant que carburant pour la propulsion, et couvre différents aspects des ateliers pour véhicules GNL, notamment les activités, le management du risque, la planification, le personnel, la disposition, les systèmes et l'exploitation. Il fournit des exigences concernant la gestion des véhicules GNL, y compris l'utilisation, le stationnement, le ravitaillement pour la mise en service, le contrôle, l'installation, la réparation et la maintenance, la mise au rebut, le transport et la documentation.
Le présent document est applicable à la gestion des véhicules GNL.

Vozila na zemeljski plin - Zahteve za delavnice in upravljanje vozil na utekočinjeni zemeljski plin

General Information

• Status: Not Published
• Publication Date: 05-Aug-2024
• ICS: 43.020 - Road vehicles in general
• ICS: 43.080.10 - Trucks and trailers
• ICS: 43.180 - Diagnostic, maintenance and test equipment
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• Technical Committee: CEN/TC 326 - Gas supply for Natural Gas Vehicles (NGV)
• Drafting Committee: CEN/TC 326/WG 5 - LNG Vehicle Use and Operation
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 11-May-2023
• Due Date: 13-Mar-2023
• Completion Date: 11-May-2023
• Ref Project: oSIST prEN 17932:2023 - Natural gas vehicles - Requirements for LNGV workshops and the management of liquefied natural gas (LNG) vehicles

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 17932:2023
01-marec-2023

Vozila na zemeljski plin - Zahteve za delavnice in upravljanje vozil na utekočinjeni

zemeljski plin
Natural gas vehicles - Requirements for LNGV workshops and the management of
liquefied natural gas (LNG) vehicles
Erdgasfahrzeuge - Anforderungen an Werkstätten und das Management von mit LNG
betriebenen Fahrzeugen
Ta slovenski standard je istoveten z: prEN 17932
ICS:
43.180 Diagnostična, vdrževalna in Diagnostic, maintenance and
preskusna oprema test equipment
75.060 Zemeljski plin Natural gas
oSIST prEN 17932:2023 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17932:2023
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oSIST prEN 17932:2023
DRAFT
EUROPEAN STANDARD
prEN 17932
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2023
ICS
English Version
Natural gas vehicles - Requirements for LNGV workshops
and the management of liquefied natural gas (LNG)
vehicles
Erdgasfahrzeuge - Anforderungen an Werkstätten und
das Management von mit LNG betriebenen Fahrzeugen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 326.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17932:2023 E

worldwide for CEN national Members.
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oSIST prEN 17932:2023
prEN 17932:2023 (E)
Contents Page

European foreword ............................................................................................................................................ 6

Introduction .......................................................................................................................................................... 7

1 Scope .......................................................................................................................................................... 7

2 Normative references .......................................................................................................................... 7

3 Terms and definitions ......................................................................................................................... 8

4 General provisions ............................................................................................................................. 12

5 LNGV workshop activities ................................................................................................................ 12

6 LNGV workshop risk management ............................................................................................... 12

6.1 Procedure .............................................................................................................................................. 12

6.2 Risk context ........................................................................................................................................... 12

6.3 Risk assessment .................................................................................................................................. 13

6.4 Risk treatment ..................................................................................................................................... 13

6.5 Risk monitoring and review ........................................................................................................... 13

6.6 Risk documentation ........................................................................................................................... 13

7 LNGV workshop planning ................................................................................................................ 13

7.1 Tools and equipment ......................................................................................................................... 13

7.2 Access restrictions .............................................................................................................................. 14

7.3 Emergency planning .......................................................................................................................... 14

7.3.1 Emergency procedures ..................................................................................................................... 14

7.3.2 Emergency access and escape ........................................................................................................ 14

7.3.3 Emergency equipment ...................................................................................................................... 14

8 LNGV workshop occupants .............................................................................................................. 14

8.1 General safety ....................................................................................................................................... 14

8.2 LNGV workshop mechanics/technicians .................................................................................... 14

8.3 Training .................................................................................................................................................. 14

8.4 Qualification ......................................................................................................................................... 15

9 LNGV workshop layout ..................................................................................................................... 15

9.1 Designated areas ................................................................................................................................. 15

9.2 Hazardous areas .................................................................................................................................. 15

9.3 Warning signs and notices ............................................................................................................... 15

9.4 Increased hazards ............................................................................................................................... 15

10 LNGV workshop systems .................................................................................................................. 16

10.1 Air compressor system ..................................................................................................................... 16

10.2 Fire protection system ...................................................................................................................... 16

10.2.1 General.................................................................................................................................................... 16

10.2.2 Fire walls ................................................................................................................................................ 16

10.3 Gas detection system ......................................................................................................................... 16

10.3.1 General.................................................................................................................................................... 16

10.3.2 Personal gas monitors....................................................................................................................... 17

10.4 Heat and lighting system .................................................................................................................. 17

10.5 Measurement system......................................................................................................................... 17

10.6 Mechanical ventilation system ....................................................................................................... 17

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11 LNGV workshop operations ............................................................................................................ 17

11.1 Documentation .................................................................................................................................... 17

11.1.1 Written procedures ........................................................................................................................... 17

11.1.2 Record keeping .................................................................................................................................... 17

11.2 Gas leak management ....................................................................................................................... 17

11.2.1 Reporting of gas leak ......................................................................................................................... 17

11.2.2 Handling LNGV with gas leaks ........................................................................................................ 17

11.2.3 Handling LNGV with liquid natural gas leaks ........................................................................... 18

11.2.4 Isolation of a vehicle tank ................................................................................................................ 18

Annex A (normative) Management of LNGV ............................................................................................ 19

A.1 Use of LNGVs ......................................................................................................................................... 19

A.1.1 General considerations .................................................................................................................... 19

A.2 Refuelling of LNGV .............................................................................................................................. 19

A.3 Parking of LNGVs ................................................................................................................................ 20

A.4 Daily check of LNGV ........................................................................................................................... 20

A.5 Inspection of LNGV ............................................................................................................................. 20

A.5.1 Routine assessment ........................................................................................................................... 20

A.5.2 Unplanned assessment ..................................................................................................................... 20

A.6 Repair and maintenance of LNGV ................................................................................................. 20

A.6.1 Nonconformity ..................................................................................................................................... 20

A.6.2 Preventative measures ..................................................................................................................... 21

A.6.2.1 General ................................................................................................................................................... 21

A.6.2.1.1 Welding and brazing .................................................................................................................. 21

A.6.2.1.2 Heated paint booth ..................................................................................................................... 21

A.6.2.2 Uncontrolled release of gas ............................................................................................................. 21

A.6.3 Prior to work ........................................................................................................................................ 21

A.6.3.1 General ................................................................................................................................................... 21

A.6.3.2 LNG system isolation ......................................................................................................................... 21

A.6.3.3 LNG tank drain ..................................................................................................................................... 21

A.6.3.4 Depressurization ................................................................................................................................ 22

A.6.4 During work .......................................................................................................................................... 22

A.6.4.1 Tank pressure monitoring .............................................................................................................. 22

A.6.4.2 Part replacement ................................................................................................................................ 22

A.6.5 After work ............................................................................................................................................. 22

A.6.5.1 Leak-testing .......................................................................................................................................... 22

A.7 Disposal of LNGVs ............................................................................................................................... 22

A.7.1 Decommissioning ............................................................................................................................... 22

A.7.2 Scrapping ............................................................................................................................................... 23

A.7.3 Resale ...................................................................................................................................................... 23

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A.8 Documentation of LNGVs ................................................................................................................. 23

Annex B (normative) Management of LNG tanks ................................................................................... 24

B.1 Use of tanks ........................................................................................................................................... 24

B.1.1 Service conditions............................................................................................................................... 24

B.2 Handling of tanks ................................................................................................................................ 24

B.2.1 General.................................................................................................................................................... 24

B.2.2 Unacceptable damage........................................................................................................................ 24

B.2.3 Hot work ................................................................................................................................................. 24

B.3 Inspection of tanks ............................................................................................................................. 24

B.3.1 Inspection interval ............................................................................................................................. 24

B.3.2 Procedure .............................................................................................................................................. 24

B.3.3 Rejection ................................................................................................................................................ 25

B.4 Storage of tanks ................................................................................................................................... 25

B.4.1 General.................................................................................................................................................... 25

B.4.2 Hazardous condition.......................................................................................................................... 25

B.5 Depressurization of LNG system ................................................................................................... 25

B.5.1 General.................................................................................................................................................... 25

B.5.2 LNG tank depressurization .............................................................................................................. 25

B.6 Draining of tanks ................................................................................................................................. 25

B.6.1 Procedure .............................................................................................................................................. 25

B.6.2 Flaring ..................................................................................................................................................... 26

B.6.2.1 Procedure .............................................................................................................................................. 26

B.6.2.2 Restrictions ........................................................................................................................................... 26

B.7 Mounting of tanks ............................................................................................................................... 26

B.7.1 Specified case ....................................................................................................................................... 26

B.8 Disposal of tank ................................................................................................................................... 26

Annex C (informative) Natural gas characteristics ................................................................................ 27

C.1 Information in manual ...................................................................................................................... 27

C.2 Composition of natural gas .............................................................................................................. 27

C.2.1 General.................................................................................................................................................... 27

C.2.2 Colour ...................................................................................................................................................... 27

C.3 Handling, cold contact burns .......................................................................................................... 28

C.3.1 General.................................................................................................................................................... 28

C.3.2 Frostbite ................................................................................................................................................. 28

C.3.3 Effect of cold on the lungs ................................................................................................................ 28

C.3.4 Hypothermia ......................................................................................................................................... 28

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C.3.5 Recommended protective clothing .............................................................................................. 28

C.4 Exposure to gas .................................................................................................................................... 28

C.4.1 Toxicity ................................................................................................................................................... 28

C.4.2 Asphyxia ................................................................................................................................................. 28

C.5 Fire precautions and protection ................................................................................................... 29

C.5.1 General ................................................................................................................................................... 29

C.5.2 Explosion danger ................................................................................................................................ 29

C.5.3 Dispersion ............................................................................................................................................. 29

Annex D (informative) LNGV workshop tools and equipment .......................................................... 30

D.1 Complementary tools ........................................................................................................................ 30

D.2 Measurement tools ............................................................................................................................ 30

D.3 LNG retrofit system specific tools ................................................................................................. 31

Bibliography ....................................................................................................................................................... 32

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oSIST prEN 17932:2023
prEN 17932:2023 (E)
European foreword

This document (prEN 17932:2022) has been prepared by Technical Committee CEN/TC 326 “Natural gas

vehicles - Fuelling and operation”, the secretariat of which is held by TSE.
This document is currently submitted to the CEN Enquiry.
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oSIST prEN 17932:2023
prEN 17932:2023 (E)
Introduction

This document provides minimum requirements for professionals on how to safely operate vehicles that

use liquefied natural gas (LNG) as a fuel for propulsion, covering various aspects of LNGV workshops. In

addition, the scope of the document addresses the LNGV owner and user and other parties dealing with

LNGVs.

This document addresses LNGV workshops and the management of liquefied natural gas (LNG) vehicles.

This document can be a useful reference for:
— LNGV workshop architects;
— LNGV workshop owners;
— LNGV workshop staff;
— OEMs;
— system manufacturers;
— LNG trucks owners and users;
— LNG trucks dealers;
— local authorities.
1 Scope

This document provides requirements for operation of vehicles that use liquefied natural gas (LNG) as a

fuel for propulsion, covering various aspects of LNGV workshops including activities, risk management,

planning, personnel, layout, systems and operations. It provides requirements regarding the

management of LNGV including use, parking, fuelling for commissioning, inspection, installation, repair

and maintenance, disposal, transportation and documentation.
This document is applicable to the management of LNG vehicles.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 2, Classification of fires

EN 50402, Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours

or of oxygen — Requirements on the functional safety of gas detection systems

EN IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas

atmospheres (IEC 60079-10-1)

EN 60079-29-2, Explosive atmospheres — Part 29-2: Gas detectors — Selection, installation, use and

maintenance of detectors for flammable gases and oxygen (IEC 60079-29-2)

EN ISO 10012, Measurement management systems — Requirements for measurement processes and

measuring equipment (ISO 10012)
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ISO 31000, Risk management — Guidelines
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
authorized qualification body

body, independent of the LNGV workshop, authorized by the certification body to prepare and administer

qualification examinations
[SOURCE: EN ISO 9712:2012, 3.1]
3.2
LNG system

assembly of components (tank(s), valves, flexible fuel lines, etc.) and connecting parts (rigid fuel lines,

pipes fitting, etc.) fitted on motor vehicles using LNG in their propulsion system

3.3
competent body

person or corporate body, defined by the national or relevant authority, which by combination of

appropriate qualification, training, experience and resources is able to make objective judgments on a

subject
[SOURCE: ISO 10691:2004, 3.2]
3.4
liquefied natural gas
LNG

natural gas that has been liquefied, after processing, for storage or transportation purposes used as a

transport fuel
[SOURCE: EN ISO 16924:2018]
3.5
vehicle tank

cryogenic tank mounted on a vehicle for the storage of LNG as a fuel for that vehicle

[SOURCE: EN ISO 16924:2018]
3.6
examining body

organization that has been appointed to verify compliance with the applicable standard

Note 1 to entry: In certain cases, an external independent examining body can be required.

[SOURCE: ISO/TR 25901-1:2016, 2.5.30]
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3.7
gas-free

less than 10 % of the lower flammable limit of natural gas in air (less than 0,5 % in air)

3.8
hazardous area

area in which an explosive gas atmosphere is present, or can be expected to be present, in quantities such

as that special precautions for the construction, installation and use of equipment are required

Note 1 to entry: The interior of many items of process equipment are commonly considered as a hazardous area

even though a flammable atmosphere may not normally be present to account for the possibility of air entering the

equipment. Where specific controls such as inerting are used the interior of process equipment may not need to be

classified as a hazardous area.
[SOURCE: EN 60079-10-1:2015, 3.3.1]
3.9
ignition source
source of energy sufficient to ignite a flammable atmosphere

Note 1 to entry: Ignition sources include naked flames, exposed incandescent material, sparks, electric welding

arcs, and electrical or mechanical equipment not approved for use in hazardous locations.

3.10
incident

unplanned event or occurrence that has been assessed as having an actual or potentially adverse effect

Note 1 to entry: An incident can be classified as a ‘major incident’ or ‘minor incident’. A major incident has effect

on the LNGV’s integrity or structural support (vehicle chassis) whereas a minor incident doesn’t. An example of a

major incident is damage to the bonnet/wing, which is designed to crumple to absorb the impact rather than

continue to transfer the momentum to the car’s passengers; a damaged hood can imply a damage on vehicle chassis.

An example of a minor incident is damage to a door panel that can be minor when limited to the skin (outer panel).

[SOURCE: ISO 28007-1:2015, 3.21, modified – ‘event’ has been replaced with ‘unplanned event or

occurrence’ and Note 1 to entry has been added.]
3.11
inspection

process of measuring, examining, testing, gauging or otherwise comparing the product with the

applicable requirements
[SOURCE: ISO 11961:2018, 3.1.19]
3.12
learning outcome
what a person is expected to
...