EN 17922:2024

SLOVENSKI STANDARD
01-julij-2024
Polnilne postaje za oskrbo z utekočinjenim zemeljskim plinom - Sistem za
zaustavitev raztovarjanja v sili
Natural gas fuelling stations - LNG unloading stop system
Gasfüllanlagen - LNG-Entlade-Stopp-System
Stations-service de gaz naturel - Système d'arrêt de déchargement de GNL
Ta slovenski standard je istoveten z: EN 17922:2024
ICS:
43.040.01 Sistemi za cestna vozila na Road vehicle systems in
splošno general
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 17922
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 43.080.10; 75.200
English Version
Natural gas fuelling stations - LNG unloading stop system
Stations-service de gaz naturel - Système d'arrêt de Gasfüllanlagen - LNG-Entlade-Stopp-System
déchargement de GNL
This European Standard was approved by CEN on 8 January 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 17922:2024 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 Functional requirements . 6
4.1 General requirement . 6
4.2 Functional description of the unloading stop system. 7
4.3 Alarms and actions for unloading stop system . 8
4.3.1 Manual triggers for unloading stop . 8
4.3.2 Automatic triggers for unloading stop . 8
5 Design of the unloading stop system . 10
5.1 General. 10
5.2 Activation time . 10
5.3 Air pressure alarm . 10
6 Technical description of unloading stop system . 10
6.1 Pneumatic system . 10
6.1.1 General. 10
6.1.2 Pressure rating . 10
6.2 Pneumatic system connector. 10
6.2.1 Technical drawing . 10
6.2.2 Profile of the pneumatic connector . 10
7 Operation of unloading stop system . 11
7.1 Testing of the pneumatic link . 11
7.2 Resume operation after ESD action . 11
Bibliography . 12

European foreword
This document (EN 17922:2024) has been prepared by Technical Committee CEN/TC 326 “Natural gas
vehicles - Fuelling and operation”, 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 September 2024, and conflicting national standards shall
be withdrawn at the latest by September 2024.
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
The transport of LNG over the road in Europe is organized through ADR regulations. This European
Agreement concerning the International Carriage of Dangerous Goods by Road specifies the safety
procedures of the road tanker and driver.
The design, construction, operation, maintenance and inspection including equipment safety and control
devices for LNG fuelling stations are described in EN ISO 16924 “Natural gas fuelling stations — LNG
stations for fuelling vehicles”.
This document describes the interface between the LNG road tanker and LNG fuelling station.
The unloading of LNG at the fuelling station must be carried out with an unloading stop system which, in
the event of an emergency, safely stops the transfer process and closes the necessary valves.
However, at the moment different fuelling station operators are using different safety systems: some are
using electronic safety systems, others are using pneumatic operated safety systems.
The proposed harmonized communication interface between the fuelling station and the LNG road tanker
is a pneumatic system. Even though an electrical interface is also used, for the present it is difficult to
propose a harmonized interface connector.
The aim of this document is to describe a harmonized pneumatic operated unloading stop system in such
a way that the safety system of LNG road tanker is linking with the safety system of the LNG fuelling
station.
The proposed unloading stop system is also applicable to the unloading of LNG road tanker to LNG
industrial.
1 Scope
This document specifies the minimum safety interface requirement for the unloading stop system
between the LNG road tanker and LNG fuelling station.
This document consists of two main topics:
— functional description of the unloading stop system;
— technical layout description of the unloading stop system.
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.
ISO 6150:2018, Pneumatic fluid power — Cylindrical quick-action couplings for maximum working
pressures of 1 MPa, 1,6 MPa, and 2,5 MPa (10 bar, 16 bar and 25 bar) — Plug connecting dimensions,
specifications, application guidelines and testing
EN ISO 16924:2018, Natural gas fuelling stations — LNG stations for fuelling vehicles (ISO 169
...