SIST EN 17963:2025
(Main)Natural gas vehicles - LNG vehicle fuelling procedures
Natural gas vehicles - LNG vehicle fuelling procedures
This document provides a guidance for safe fuelling operations of heavy duty vehicles and busses that use liquefied natural gas (LNG) as a fuel for propulsion, covering all the aspects of the fuelling operation, taking into account the existing differences in LNG fuelling equipment.
This document is applicable to the operation of LNG vehicles
Erdgasfahrzeuge - Betankungsabläufe für LNG Fahrzeuge
Dieses Dokument enthält Leitlinien für sichere Betankungsabläufe für Fahrzeuge, deren Antrieb auf Flüssigerdgas (LNG, en: liquefied natural gas) als Kraftstoff beruht, und deckt die Aktivitäten und Abläufe ab, die zu befolgen sind, um sicherzustellen, dass die Bedienung sicher ist. Es enthält Verfahren, die auf unterschiedliche Betankungssysteme und technologien anwendbar sind.
ANMERKUNG Das Dokument beruht auf der Überlegung, dass der Arbeitgeber verpflichtet ist, Gesundheit, Sicherheit und Wohlbefinden der Arbeitnehmer zu schützen (wie in Richtlinie 89/391/EWG dargelegt).
Deshalb wird davon ausgegangen, dass der Arbeitgeber des Fahrzeugführers dafür verantwortlich ist, sicherzustellen, dass LNG Fahrzeugführer angemessen ausgebildet werden.
Véhicules au gaz naturel - Procédures de ravitaillement des véhicules GNL
Le présent document fournit les lignes directrices pour les opérations de ravitaillement des véhicules qui utilisent du gaz naturel liquéfié (GNL) comme carburant de propulsion, couvrant les activités et les procédures à suivre pour un fonctionnement en toute sécurité. Il fournit les procédures applicables aux différents systèmes et technologies de ravitaillement.
NOTE Le document s’appuie sur le fait qu’il incombe à l’employeur d’assurer la protection de la santé, de la sécurité et du bien-être des employés (selon l’organisation de la directive 89/391 CEE).
Ainsi, il est de la responsabilité de l’employeur d’assurer que ses conducteurs de véhicules GNL ont reçu la formation adéquate.
Vozila na zemeljski plin - Postopki polnjenja vozil na utekočinjeni zemeljski plin
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Vozila na zemeljski plin - Postopki polnjenja vozil na utekočinjeni zemeljski plin
Natural gas vehicles - LNG vehicle fuelling procedures
Erdgasfahrzeuge - Betankungsabläufe für LNG Fahrzeuge
Véhicules au gaz naturel - Procédures de ravitaillement des véhicules GNL
Ta slovenski standard je istoveten z: EN 17963:2024
ICS:
43.020 Cestna vozila na splošno Road vehicles in general
75.060 Zemeljski plin Natural gas
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17963
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 43.080.01; 75.200
English Version
Natural gas vehicles - LNG vehicle fuelling procedures
Véhicules au gaz naturel - Procédures de ravitaillement Erdgasfahrzeuge - Betankungsabläufe für LNG
des véhicules GNL Fahrzeuge
This European Standard was approved by CEN on 24 June 2024.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17963:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 LNG fuelling operations . 6
4.1 General. 6
4.2 Safety precautions . 6
4.2.1 General. 6
4.2.2 Personal safety . 6
4.3 Pre-fuelling. 6
4.3.1 General. 6
4.3.2 Pre-fuelling conditions . 6
4.4 Fuelling operations . 7
4.4.1 General. 7
4.4.2 Identification . 7
4.4.3 Grounding . 7
4.4.4 Preparation of LNG nozzle connection . 7
4.4.5 Vapour pressure reduction . 7
4.5 Disconnect LNG nozzle . 9
4.6 Final operation . 9
Annex A (informative) Troubleshooting . 10
A.1 Emergency procedures . 10
A.1.1 General. 10
A.1.2 First aid . 10
A.2 Leakages . 10
A.2.1 General. 10
A.2.2 Leakages during nozzle disconnection . 10
A.3 Freezing of the connection . 10
A.4 Fire . 11
Annex B (normative) Warm tank refuelling procedure . 12
European foreword
This document (EN 17963:2024) has been prepared by Technical Committee CEN/TC 326 “Natural gas
Vehicles”, the secretariat of which is held by TSE.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2025, and conflicting national standards shall
be withdrawn at the latest by January 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Introduction
This document addresses the general operational and safety instructions for fuelling of LNG vehicles.
Training of LNG vehicle drivers is not part of this procedure.
1 Scope
This document gives guidelines for safe fuelling operations of vehicles that use liquefied natural gas
(LNG) as a fuel for propulsion, covering the activities and procedures to be followed for safe operation.
It provides procedures applicable to different fuelling systems and technologies.
NOTE Regarding the responsibility surrounding the training of drivers of LNG vehicles, see the framework of
Directive 89/391 EEC.
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 511, Protective gloves against cold
EN ISO 16321-1, Eye and face protection for occupational use — Part 1: General requirements
(ISO 16321 1)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
LNG vehicle fuel 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
3.2
liquefied natural gas
LNG
natural gas that has been liquefied, after processing, for storage or transportation purposes used as a
transport fuel, regardless of its production pathways (e.g. renewable, synthetic or fossil)
3.3
vehicle tank
cryogenic tank mounted on a vehicle for the storage of LNG as a fuel
3.4
ignition source
source of energy sufficient to ignite a flammable atmosphere
3.5
dispenser
equipment through which the liquefied natural gas is supplied to the vehicle
3.6
operator
person executing the fuelling
3.7
cryogenic burns
cold burns caused by cryogenic gas
4 LNG fuelling operations
4.1 General
How to operate the dispenser can vary from station to station. This paragraph sets out the general
instructions for this activity. Specific operating instructions shall be provided at the station.
4.2 Safety precautions
4.2.1 General
Before starting fuelling, the operator shall ensure that no ignition sources (e.g. naked flames, exposed
incandescent material, sparks, electrical equipment) are present in the close surroundings of the vehicle
and that the no smoking rule is followed. Fuelling shall not take place during thunderstorms.
Before starting fuelling, the operator shall read the emergency procedures of the station.
4.2.2 Personal safety
During the entire fuelling operation, it is necessary to protect the operator from cryogenic burns. The
operator shall at least wear the following protective equipment:
— face shield (EN ISO 16321-1);
— long cryogenic gloves (EN 511);
— clothes with long sleeves fully covering exposed skin including legs and arms;
— closed shoes.
4.3 Pre-fuelling
4.3.1 General
Tanks can be filled at the station only if they are in the proper conditions of pressure and temperature.
If tank conditions are not suitable for fuelling, the vapour pressure reduction procedure listed in 4.4.5
shall be followed.
If the vehicle has been parked with an empty tank for several days, the Vehicle tank is considered
“warm” (i.e. expected close to ambient temperature) and the specific procedure in Annex B shall be
followed.
4.3.2 Pre-fuelling conditions
Before fuelling the vehicle shall be parked in the proper area and the following requirements shall be
met:
— parking brake activated;
— engine turned off;
— external heating/cooling (e.g. cabin heating, refrigeration system, etc.) turned off;
— windows of the vehicle closed;
— electronic devices left inside the vehicle.
4.4 Fuelling operations
4.4.1 General
If all the pre-fuelling requirements are met, the operator can start the fuelling operation.
4.4.2 Identification
If requested at the station, the operator shall start the identification procedure.
Operator may be asked to select the fuel type (i.e. “cold”/“unsaturated” or “warm”/“saturated”), or
vehicle brand.
4.4.3 Grounding
If the instructions at the station prescribe the use of a grounding connection, the dispenser’s grounding
cable shall be connected to the prescribed point on the vehicle tank.
4.4.4 Preparation of LNG nozzle connection
The tank cap shall be removed from the vehicle tank. The operator shall visually check that fuelling
equipment on the dispenser and vehicle tank are not damaged; the operator shall clean both nozzle and
receptacle with the dispenser’s air blow gun.
4.4.5 Vapour pressure reduction
4.4.5.1 General
Pressure inside the tank can be higher than the supply pressure at the station. To allow fuelling
operations, the tank pressure shall be adjusted to the level required by the station. The pressure
adjustment pr
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