SIST EN ISO 16924:2018

Natural gas fuelling stations - LNG stations for fuelling vehicles (ISO 16924:2016)

ISO 16924:2016 specifies the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices.
ISO 16924:2016 also specifies the design, construction, operation, maintenance and inspection of fuelling stations for using LNG as an onsite source for fuelling CNG to vehicles (LCNG fuelling stations), including safety and control devices of the station and specific LCNG fuelling station equipment.
NOTE Specific CNG equipment is dealt with in ISO 16923.
ISO 16924:2016 is applicable to fuelling stations receiving LNG and other liquefied methane-rich gases that comply with local applicable gas composition regulation or with the gas quality requirements of ISO 13686.
ISO 16924:2016 includes all equipment from the LNG storage tank filling connection up to the fuelling nozzle on the vehicle. The LNG storage tank filling connection itself and the vehicle fuelling nozzle are not covered in this document.
ISO 16924:2016 includes fuelling stations having the following characteristics:
- private access;
- public access (self-service or assisted);
- metered dispensing and non metered dispensing;
- fuelling stations with fixed LNG storage;
- fuelling stations with mobile LNG storage;
- movable fuelling stations;
- mobile fuelling stations;
- multi-fuel stations.

Erdgastankstellen - Tankstellen für verflüssigtes Erdgas (LNG) zur Betankung von Fahrzeugen (ISO 16924:2016)

Dieses Dokument legt die Ausführung, die Konstruktion, den Betrieb, die Instandhaltung und die Inspektion von Tankstellen für verflüssigtes Erdgas (LNG, en: liquefied natural gas) zur Betankung von Fahrzeugen fest, einschließlich der Ausrüstung und Sicherheits- und Steuer- und Kontrollvorrichtungen.
Dieses Dokument beschreibt zudem die Ausführung, die Konstruktion, den Betrieb, die Instandhaltung und die Inspektion von Tankstellen für die Verwendung von verflüssigtem Erdgas (LNG) als Quelle vor Ort zur Betankung von Fahrzeugen mit CNG (en: compressed natural gas) einschließlich Sicherheits- und Steuer- und Kontrollvorrichtungen der Tankstelle und eine für LCNG-Tankstellen (LCNG, en: liquefied compressed natural gas) spezifische Ausrüstung fest.
ANMERKUNG   Die spezifische CNG-Ausrüstung wird in ISO 16923 behandelt.
Dieses Dokument gilt für Tankstellen, die LNG oder andere verflüssigte methanreiche Gase aufnehmen, die den anwendbaren örtlichen Bestimmungen über die Gaszusammensetzung oder den Qualitätsanforderungen für Gas in ISO 13686 entsprechen.
Dieses Dokument umfasst die gesamte Ausrüstung, vom Betankungsanschluss des LNG-Speichertanks bis hin zur Füllkupplung am Fahrzeug. Der Betankungsanschluss des LNG-Speichertanks und die Füllkupplung am Fahrzeug selbst werden in diesem Dokument jedoch nicht behandelt.
Dieses Dokument umfasst Tankstellen mit den folgenden Eigenschaften:
   privater Zugang;
   öffentlicher Zugang (Selbstbedienung oder mit Tankwart-Service);
   Zapfsäulen mit oder ohne Zählwerk;
   Tankstellen mit fester LNG-Speicherung;
   Tankstellen mit mobiler LNG-Speicherung;
   bewegliche Tankstellen;
   mobile Tankstellen;
   Multikraftstoff-Tankstellen.

Stations-service de gaz naturel - Stations GNL pour le ravitaillement de véhicules (ISO 16924:2016)

L'ISO 16924:2016 spécifie la conception, la construction, l'exploitation, la maintenance et l'inspection des stations-service de gaz naturel liquéfié (GNL) pour véhicules, dont les équipements et les dispositifs de sécurité et de contrôle.
L'ISO 16924:2016 spécifie également la conception, la construction, l'exploitation, la maintenance et l'inspection des stations-service de gaz naturel liquéfié (GNL) servant également de site de ravitaillement des véhicules en gaz naturel comprimé (GNC), appelées stations-service de GNLC (gaz naturel liquéfié/comprimé), en couvrant les dispositifs de sécurité et de contrôle des stations et les équipements propres aux stations-service GNLC.
NOTE Les équipements propres aux stations de GNC sont couverts par l'ISO 16923.
L'ISO 16924:2016 s'applique aux stations-service ravitaillées en GNL et autres gaz liquéfiés riches en méthane conformes à la réglementation locale applicable aux compositions gazeuses ou aux exigences en matière de qualité des gaz de l'ISO 13686.
L'ISO 16924:2016 couvre tous les équipements, du connecteur pour le dépotage de GNL dans réservoir de stockage GNL au pistolet de ravitaillement destiné aux réservoirs des véhicules. Le connecteur de ravitaillement du réservoir et le pistolet de ravitaillement des véhicules à proprement dits ne sont pas couverts par ce document.
L'ISO 16924:2016 couvre toutes les stations-service présentant les caractéristiques suivantes:
- accès privé;
- accès public (self-service ou avec assistance);
- borne de distribution de carburant avec ou sans compteur;
- stations-service avec stockage de GNL fixe;
- stations-service avec stockage mobile de GNL;
- stations-service transportables;
- stations-service mobiles;
- stations-service multi-carburants.

Polnilne postaje za oskrbo z zemeljskim plinom - Postaje za oskrbo vozil z utekočinjenim zemeljskim plinom (ISO 16924:2016)

Standard ISO 16924:2016 določa projektiranje, izgradnjo, obratovanje, vzdrževanje in nadzor polnilnih postaj za oskrbo vozil z utekočinjenim zemeljskim plinom (LNG), vključno z opremo ter varnostnimi in krmilnimi napravami.
Standard ISO 16924:2016 določa tudi projektiranje, izgradnjo, obratovanje, vzdrževanje in nadzor polnilnih postaj za uporabo utekočinjenega zemeljskega plina kot vira za oskrbo vozil s stisnjenim zemeljskim plinom na mestu uporabe (polnilne postaje za oskrbo z utekočinjenim stisnjenim zemeljskim plinom), vključno z opremo ter varnostnimi in krmilnimi napravami postaje ter posebno opremo za polnilne postaje za oskrbo z utekočinjenim stisnjenim zemeljskim plinom.
OPOMBA: Standard ISO 16923 zajema posebno opremo za stisnjeni zemeljski plin.
Standard ISO 16924:2016 se uporablja za polnilne postaje, ki prejemajo utekočinjeni zemeljski plin in druge utekočinjene pline, bogate z metanom, in so v skladu z lokalnimi veljavnimi predpisi o sestavi plina ali z zahtevami o kakovosti plina, določenimi v standardu ISO 13686.
Standard ISO 16924:2016 vključuje vso opremo od priključka za polnjenje rezervoarja z utekočinjenim zemeljskim plinom do šobe za dotok goriva na vozilu. Priključek za polnjenje rezervoarja z utekočinjenim zemeljskim plinom in šoba za dotok goriva na vozilu nista vključena v ta dokument.
Standard ISO 16924:2016 vključuje polnilne postaje z naslednjimi lastnostmi:
– z zasebnim dostopom;
– z javnim dostopom (samopostrežne ali ne);
– z odmerjenim in neodmerjenim polnjenjem;
– polnilne postaje s fiksnim rezervoarjem za utekočinjeni zemeljski plin;
– polnilne postaje z mobilnim rezervoarjem za utekočinjeni zemeljski plin;
– premične polnilne postaje;
– mobilne polnilne postaje;
– postaje z različnimi vrstami plina.

General Information

• Status: Published
• Public Enquiry End Date: 04-Dec-2017
• Publication Date: 06-May-2018
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• Technical Committee: DPL - Gas supply
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 11-Apr-2018
• Due Date: 16-Jun-2018
• Completion Date: 07-May-2018
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Mandate: M/533 - [C(2015)1330] Standardisation request addressed to CEN, CENELEC and ETSI in support of the implementation of the Directive 2014/94/EU on the deployment of alternative fuels infrastructure
• Ref Project: EN ISO 16924:2018 - Natural gas fuelling stations - LNG stations for fuelling vehicles (ISO 16924:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16924:2018
01-junij-2018
3ROQLOQHSRVWDMH]DRVNUER]]HPHOMVNLPSOLQRP3RVWDMH]DRVNUERYR]LO]
XWHNRþLQMHQLP]HPHOMVNLPSOLQRP,62
Natural gas fuelling stations - LNG stations for fuelling vehicles (ISO 16924:2016)
Erdgastankstellen - Tankstellen für verflüssigtes Erdgas (LNG) zur Betankung von
Fahrzeugen (ISO 16924:2016)
Stations-service de gaz naturel - Stations GNL pour le ravitaillement de véhicules (ISO
16924:2016)
Ta slovenski standard je istoveten z: EN ISO 16924:2018
ICS:
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
SIST EN ISO 16924:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16924:2018

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SIST EN ISO 16924:2018


EN ISO 16924
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2018
EUROPÄISCHE NORM
ICS 75.200
English Version

Natural gas fuelling stations - LNG stations for fuelling
vehicles (ISO 16924:2016)
Stations-service de gaz naturel - Stations GNL pour le Erdgastankstellen - Tankstellen für verflüssigtes
ravitaillement de véhicules (ISO 16924:2016) Erdgas (LNG) zur Betankung von Fahrzeugen (ISO
16924:2016)
This European Standard was approved by CEN on 26 January 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16924:2018 E
worldwide for CEN national Members.

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SIST EN ISO 16924:2018
EN ISO 16924:2018 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 16924:2018
EN ISO 16924:2018 (E)
European foreword
The text of ISO 16924:2016 has been prepared by ISO/TMBG “Technical Management Board - groups”
of the International Organization for Standardization (ISO) and has been taken over as
EN ISO 16924:2018 by Technical Committee CEN/TC 326 “Natural Gas Vehicles - Fuelling and
Operation” the secretariat of which is held by NEN.
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 October 2018, and conflicting national standards shall
be withdrawn at the latest by October 2018.
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.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This document has been prepared under the standardization request M/533 given to CEN by the
European Commission and the European Free Trade Association in the framework of
Directive 2014/94/EU on the deployment of alternative fuels infrastructure.
The standardization request M/533 focuses on interoperability aspects of the alternative fuels
infrastructure, which for LNG fuelling stations are covered in this document by the following items:
— Fuelling pressure (service pressure): This document requires that the pressure of LNG at the nozzle
is lower than the maximum allowable working pressure of the vehicle tank.
— Connector profile: The harmonized connector profile is described in EN ISO 12617:2017, that
specifies LNG refuelling nozzles and receptacles constructed entirely of new and unused parts and
materials for road vehicles powered by LNG, and which is referenced in this document.
In addition to interoperability aspects, the following aspects are relevant for applying this document in
Europe:
— Fuel quality: The quality of LNG for use as automotive fuel is covered in EN 16723-2:2017, that
specifies the requirements and test methods for natural gas, biomethane and blends of both.
— Fuel labelling: The fuel label for LNG at dispensers is covered by EN 16942:2016, that lays down
harmonized identifiers for marketed liquid and gaseous fuels, and which has also been developed
to support Directive 2014/94/EU.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
3

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SIST EN ISO 16924:2018
EN ISO 16924:2018 (E)
Endorsement notice
The text of ISO 16924:2016 has been approved by CEN as EN ISO 16924:2018 without any modification.


4

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SIST EN ISO 16924:2018
INTERNATIONAL ISO
STANDARD 16924
First edition
2016-12-01
Natural gas fuelling stations — LNG
stations for fuelling vehicles
Stations-service de gaz naturel — Stations GNL pour le ravitaillement
de véhicules
Reference number
ISO 16924:2016(E)
©
ISO 2016

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SIST EN ISO 16924:2018
ISO 16924:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 16924:2018
ISO 16924:2016(E)

Contents Page
Foreword .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 9
5 Risk management .10
5.1 Risk assessment .10
5.1.1 General.10
5.1.2 Protection against overpressure .10
5.1.3 Static electricity .11
5.2 Fire protection .11
5.2.1 Hazardous area classification .11
5.2.2 Sources of ignition .11
5.2.3 Fire fighting .12
5.3 Explosion protection measures .12
6 General design requirements .12
6.1 General .12
6.1.1 Design philosophy .12
6.1.2 Buildings and civil works .13
6.1.3 Installation and construction .14
6.2 Site layout .15
6.2.1 Separation distances .15
6.2.2 Traffic management .15
6.2.3 Security .15
6.2.4 Requirements for location of equipment .15
6.3 Environmental considerations .16
6.3.1 Noise attenuation .16
6.3.2 Prevention of venting of natural gas .16
7 Fuel supply to the fuelling station .16
7.1 Application .16
7.2 Equipment compatibility .16
7.3 Filling connector .17
7.4 Requirements for filling .17
7.4.1 General requirements .17
7.4.2 Prevention of overpressurization and overfilling .17
7.5 Prevention of back flow .17
7.6 Bleed connections .17
7.7 Draining of liquid from the LNG storage tank .18
7.8 LNG tanker .18
7.8.1 Immobility .18
7.8.2 Anti-drive-away equipment .18
7.8.3 Turning off the engine .18
7.8.4 Equalizing the potentials .18
8 Storage .18
8.1 LNG storage .18
8.1.1 Design and construction .18
8.1.2 Safety requirements .20
8.1.3 Installation guidance .24
8.2 CNG buffer storage .25
9 Pumps and compressors .25
9.1 Connection of LNG pumps to the LNG storage tank .25
© ISO 2016 – All rights reserved iii

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SIST EN ISO 16924:2018
ISO 16924:2016(E)

9.1.1 General.25
9.1.2 NPSH requirements .25
9.1.3 Vapour return .25
9.1.4 Protection against weather .25
9.1.5 Accessibility .26
9.2 LNG centrifugal pump (including ancillaries) .26
9.2.1 General provisions.26
9.2.2 Liquid inlet to the centrifugal pump .26
9.2.3 Centrifugal pump design .26
9.2.4 Vibration .26
9.2.5 Detection of shaft seal leak .27
9.2.6 Detection of cavitation .27
9.3 LNG reciprocating pump for LCNG fuelling stations (including ancillaries) .27
9.3.1 General provisions.27
9.3.2 Liquid supplied to the reciprocating pump .27
9.3.3 Design .27
9.3.4 Vibration .27
9.3.5 Pulsation .27
9.4 Commonalities for LNG centrifugal and reciprocating pumps .27
9.4.1 Suction line .27
9.4.2 Instrumentation .28
9.4.3 Markings of a pump .28
9.4.4 Instructions .28
9.5 Natural gas compressor .29
10 Dispensers .29
10.1 LNG dispensers .29
10.1.1 General requirements .29
10.1.2 Breakaway system .31
10.1.3 Fuelling hoses .31
10.1.4 Fuelling nozzles .32
10.1.5 Dispenser enclosure .32
10.1.6 Other requirements .33
10.2 CNG dispensers .33
11 Vaporizers and heaters .34
11.1 Application .34
11.2 Design of vaporizers and heaters .34
11.3 Ambient air vaporizer .35
11.3.1 General.35
11.3.2 Defrosting .35
11.3.3 Aluminium vaporizers .35
11.4 Electric vaporizer/heater .35
11.5 Water bath vaporizer .36
11.6 Fired vaporizers .36
11.7 Remotely heated vaporizers .36
12 Odorization .36
12.1 General requirements .36
12.2 High-pressure odorizer .37
12.3 Safety .37
12.4 Monitoring .37
12.5 Odorant .38
12.6 Dynamics of function .38
13 Pipework .38
13.1 General .38
13.2 Pipework design .38
13.2.1 General.38
13.2.2 Overground pipework .39
iv © ISO 2016 – All rights reserved

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SIST EN ISO 16924:2018
ISO 16924:2016(E)

13.2.3 Underground pipework .39
13.2.4 Pipework in ducts .39
13.2.5 Flexible connections .40
14 Electrical equipment and wiring .40
14.1 General .40
14.2 Main considerations .40
14.2.1 Grounding .40
14.2.2 Lightning .40
14.2.3 Contact with live parts .40
14.2.4 Cables . .40
14.2.5 Static electricity .
...

SLOVENSKI STANDARD
oSIST prEN ISO 16924:2017
01-november-2017
3ROQLOQHSRVWDMH]DRVNUER]]HPHOMVNLPSOLQRP3RVWDMH]DRVNUERYR]LO]
XWHNRþLQMHQLP]HPHOMVNLPSOLQRP,62
Natural gas fuelling stations - LNG stations for fuelling vehicles (ISO 16924:2016)
Erdgastankstellen - Tankstellen für verflüssigtes Erdgas (LNG) zur Betankung von
Fahrzeugen (ISO 16924:2016)
Stations-service de gaz naturel - Stations GNL pour le ravitaillement de véhicules (ISO
16924:2016)
Ta slovenski standard je istoveten z: prEN ISO 16924
ICS:
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
oSIST prEN ISO 16924:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 16924:2017

---------------------- Page: 2 ----------------------
oSIST prEN ISO 16924:2017


DRAFT
EUROPEAN STANDARD
prEN ISO 16924
NORME EUROPÉENNE

EUROPÄISCHE NORM

September 2017
ICS 75.200
English Version

Natural gas fuelling stations - LNG stations for fuelling
vehicles (ISO 16924:2016)
Stations-service de gaz naturel - Stations GNL pour le Erdgastankstellen - Tankstellen für verflüssigtes
ravitaillement de véhicules (ISO 16924:2016) Erdgas (LNG) zur Betankung von Fahrzeugen (ISO
16924:2016)
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 16924:2017 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN ISO 16924:2017
prEN ISO 16924:2017 (E)
Contents Page
European foreword . 3
2

---------------------- Page: 4 ----------------------
oSIST prEN ISO 16924:2017
prEN ISO 16924:2017 (E)
European foreword
The text of ISO 16924:2016 has been prepared by Technical Committee ISO/PC 252 “Natural gas
fuelling stations for vehicles” of the International Organization for Standardization (ISO) and has been
taken over as prEN ISO 16924:2017 by Technical Committee CEN/TC 326 “Natural Gas Vehicles -
Fuelling and Operation” the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This document has been prepared under the standardization request M/533 given to CEN by the
European Commission and the European Free Trade Association in the framework of Directive
2014/94/EU on the deployment of alternative fuels infrastructure.
The standardization request M/533 focuses on interoperability aspects of the alternative fuels
infrastructure, which for LNG fuelling stations are covered in this document by the following items:
— Fuelling pressure (service pressure): This document requires that the pressure of LNG at the nozzle
is lower than the maximum allowable working pressure of the vehicle tank.
— Connector profile: The harmonized connector profile is described in EN ISO 12617:2017, that
specifies LNG refuelling nozzles and receptacles constructed entirely of new and unused parts and
materials for road vehicles powered by LNG, and which is referenced in this document.
In addition to interoperability aspects, the following aspects are relevant for applying this document in
Europe:
— Fuel quality: The quality of LNG for use as automotive fuel is covered in EN 16723-2:2017, that
specifies the requirements and test methods for natural gas, biomethane and blends of both.
— Fuel labelling: The fuel label for LNG at dispensers is covered by EN 16942:2016, that lays down
harmonized identifiers for marketed liquid and gaseous fuels, and which has also been developed to
support Directive 2014/94/EU.
Endorsement notice
The text of ISO 16924:2016 has been approved by CEN as prEN ISO 16924:2017 without any
modification.
3

---------------------- Page: 5 ----------------------
oSIST prEN ISO 16924:2017

---------------------- Page: 6 ----------------------
oSIST prEN ISO 16924:2017
INTERNATIONAL ISO
STANDARD 16924
First edition
2016-12-01
Natural gas fuelling stations — LNG
stations for fuelling vehicles
Stations-service de gaz naturel — Stations GNL pour le ravitaillement
de véhicules
Reference number
ISO 16924:2016(E)
©
ISO 2016

---------------------- Page: 7 ----------------------
oSIST prEN ISO 16924:2017
ISO 16924:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

---------------------- Page: 8 ----------------------
oSIST prEN ISO 16924:2017
ISO 16924:2016(E)

Contents Page
Foreword .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 9
5 Risk management .10
5.1 Risk assessment .10
5.1.1 General.10
5.1.2 Protection against overpressure .10
5.1.3 Static electricity .11
5.2 Fire protection .11
5.2.1 Hazardous area classification .11
5.2.2 Sources of ignition .11
5.2.3 Fire fighting .12
5.3 Explosion protection measures .12
6 General design requirements .12
6.1 General .12
6.1.1 Design philosophy .12
6.1.2 Buildings and civil works .13
6.1.3 Installation and construction .14
6.2 Site layout .15
6.2.1 Separation distances .15
6.2.2 Traffic management .15
6.2.3 Security .15
6.2.4 Requirements for location of equipment .15
6.3 Environmental considerations .16
6.3.1 Noise attenuation .16
6.3.2 Prevention of venting of natural gas .16
7 Fuel supply to the fuelling station .16
7.1 Application .16
7.2 Equipment compatibility .16
7.3 Filling connector .17
7.4 Requirements for filling .17
7.4.1 General requirements .17
7.4.2 Prevention of overpressurization and overfilling .17
7.5 Prevention of back flow .17
7.6 Bleed connections .17
7.7 Draining of liquid from the LNG storage tank .18
7.8 LNG tanker .18
7.8.1 Immobility .18
7.8.2 Anti-drive-away equipment .18
7.8.3 Turning off the engine .18
7.8.4 Equalizing the potentials .18
8 Storage .18
8.1 LNG storage .18
8.1.1 Design and construction .18
8.1.2 Safety requirements .20
8.1.3 Installation guidance .24
8.2 CNG buffer storage .25
9 Pumps and compressors .25
9.1 Connection of LNG pumps to the LNG storage tank .25
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ISO 16924:2016(E)

9.1.1 General.25
9.1.2 NPSH requirements .25
9.1.3 Vapour return .25
9.1.4 Protection against weather .25
9.1.5 Accessibility .26
9.2 LNG centrifugal pump (including ancillaries) .26
9.2.1 General provisions.26
9.2.2 Liquid inlet to the centrifugal pump .26
9.2.3 Centrifugal pump design .26
9.2.4 Vibration .26
9.2.5 Detection of shaft seal leak .27
9.2.6 Detection of cavitation .27
9.3 LNG reciprocating pump for LCNG fuelling stations (including ancillaries) .27
9.3.1 General provisions.27
9.3.2 Liquid supplied to the reciprocating pump .27
9.3.3 Design .27
9.3.4 Vibration .27
9.3.5 Pulsation .27
9.4 Commonalities for LNG centrifugal and reciprocating pumps .27
9.4.1 Suction line .27
9.4.2 Instrumentation .28
9.4.3 Markings of a pump .28
9.4.4 Instructions .28
9.5 Natural gas compressor .29
10 Dispensers .29
10.1 LNG dispensers .29
10.1.1 General requirements .29
10.1.2 Breakaway system .31
10.1.3 Fuelling hoses .31
10.1.4 Fuelling nozzles .32
10.1.5 Dispenser enclosure .32
10.1.6 Other requirements .33
10.2 CNG dispensers .33
11 Vaporizers and heaters .34
11.1 Application .34
11.2 Design of vaporizers and heaters .34
11.3 Ambient air vaporizer .35
11.3.1 General.35
11.3.2 Defrosting .35
11.3.3 Aluminium vaporizers .35
11.4 Electric vaporizer/heater .35
11.5 Water bath vaporizer .36
11.6 Fired vaporizers .36
11.7 Remotely heated vaporizers .36
12 Odorization .36
12.1 General requirements .36
12.2 High-pressure odorizer .37
12.3 Safety .37
12.4 Monitoring .37
12.5 Odorant .38
12.6 Dynamics of function .38
13 Pipework .38
13.1 General .38
13.2 Pipework design .38
13.2.1 General.38
13.2.2 Overground pipework .39
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oSIST prEN ISO 16924:2017
ISO 16924:2016(E)

13.2.3 Underground pipework .39
13.2.4 Pipework in ducts .39
13.2.5 Flexible connections .40
14 Electrical equipment and wiring .40
14.1 General .40
14.2 Main considerations .40
14.2.1 Grounding .40
14.2.2 Lightning .40
14.2.3 Contact with live parts .40
14.2.4 Cables . .40
14.2.5 Static electricity .41
14.3 Other considerations .41
14.3.1 Interface .41
14.3.2 Primary seal .
...