SIST EN ISO 16924:2026
(Main)Natural gas fuelling stations - Liquefied natural gas (LNG) stations for fuelling road vehicles (ISO 16924:2026)
Natural gas fuelling stations - Liquefied natural gas (LNG) stations for fuelling road vehicles (ISO 16924:2026)
This document specifies requirements for the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices. This document also specifies the design, construction, operation, maintenance and inspection of fuelling stations using LNG as an onsite source for supplying compressed natural gas (CNG) to vehicles, commonly referred to as liquefied-to-compressed natural gas (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.
This document is applicable to fuelling stations receiving LNG and other liquefied methane-rich gases such as bio LNG which comply with local applicable gas composition regulations or with the gas quality requirements of ISO 13686.
This document covers all equipment from the LNG storage tank unloading connection up to (but not including) the fuelling nozzle on the vehicle. The LNG storage tank unloading connection itself and the vehicle fuelling nozzle are not covered in this document.
This document applies to 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.
This document does not apply to:
equipment, piping, or tubing downstream of the gas pressure regulator for closed boil-off gas systems;
liquefaction equipment.
Gasfüllanlagen - LNG Füllanlagen zur Betankung von Fahrzeugen (ISO 16924:2026)
Dieses Dokument legt Anforderungen an 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 Bereitstellung von komprimiertem Erdgas (CNG, en: compressed natural gas) für Fahrzeuge, meist LCNG-Tankstellen (Tankstellen für komprimiertes Erdgas aus LNG, LCNG (en: liquefied-to-compressed natural gas)) genannt, einschließlich Sicherheits- und Steuer- und Kontrollvorrichtungen der Tankstelle und eine für LCNG-Tankstellen 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 wie Bio-LNG aufnehmen, die den anwendbaren örtlichen Bestimmungen über die Gaszusammensetzung oder den Qualitätsanforderungen für Gas nach ISO 13686 entsprechen.
Dieses Dokument erfasst die gesamte Ausrüstung, vom Entladungsanschluss des LNG-Speichertanks bis hin zur (aber nicht einschließlich der) Füllkupplung am Fahrzeug. Der Entladungsanschluss des LNG-Speichertanks und die Füllkupplung am Fahrzeug selbst werden in diesem Dokument jedoch nicht behandelt.
Dieses Dokument gilt für 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.
Dieses Dokument gilt nicht für:
Ausrüstungsteile, Rohrleitungen oder dem Gasdruckregler nachgelagerte Rohre bei geschlossenen Boil-Off-Gas-Systemen;
Ausrüstung zur Verflüssigung.
Stations-service de gaz naturel - Stations de gaz naturel liquéfié (GNL) pour le ravitaillement de véhicules routiers (ISO 16924:2026)
Le présent document spécifie les exigences relatives à la conception, la construction, l'exploitation, la maintenance et l'inspection des stations-service de gaz naturel liquéfié (GNL) pour véhicules, y compris les équipements et les dispositifs de sécurité et de contrôle. Le présent document spécifie également la conception, la construction, l'exploitation, la maintenance et l'inspection des stations-service utilisant du GNL servant de site de ravitaillement des véhicules en gaz naturel comprimé (GNC), communément appelées stations-service de gaz naturel liquéfié/comprimé (GNLC), y compris 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.
Le présent document s'applique aux stations-service ravitaillées en GNL et autres gaz liquéfiés riches en méthane, comme le bio GNL, conformes aux réglementations locales applicables aux compositions gazeuses ou aux exigences en matière de qualité des gaz de l'ISO 13686.
Le présent document couvre tous les équipements, du connecteur pour le dépotage de GNL dans le réservoir de stockage GNL (mais sans inclure) au pistolet de ravitaillement destiné aux réservoirs des véhicules. Le raccord de dépotage du réservoir et le pistolet de ravitaillement des véhicules à proprement dits ne sont pas couverts par le présent document.
Le présent document s'applique à 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 déplaçables;
stations-service mobiles;
stations-service multi-carburants.
Le présent document ne s'applique pas:
à l'équipement, aux canalisations ou aux conduites en aval du régulateur de pression de gaz pour les systèmes de gaz d'évaporation fermés;
à l'équipement de liquéfaction.
Polnilne postaje za oskrbo z zemeljskim plinom - Postaje za oskrbo vozil z utekočinjenim zemeljskim plinom (LNG) (ISO 16924:2026)
Ta dokument določa zahteve za načrtovanje, gradnjo, obratovanje, vzdrževanje in pregled postaj za polnjenje vozil s utekočinjenim zemeljskim plinom (LNG), vključno z opremo, varnostnimi in kontrolnimi napravami. Dokument prav tako določa načrtovanje, gradnjo, obratovanje, vzdrževanje in pregled polnilnih postaj, ki uporabljajo LNG kot vir na kraju samem za oskrbo vozil s stisnjenim zemeljskim plinom (CNG), kar se običajno imenuje polnilne postaje za utekočinjeni v stisnjeni zemeljski plin (LCNG), vključno z varnostnimi in kontrolnimi napravami postaje ter specifično opremo za LCNG polnilne postaje.
OPOMBA Specifična oprema za CNG je obravnavana v ISO 16923.
Ta dokument je uporaben za polnilne postaje, ki prejemajo LNG in druge utekočinjene pline, bogate z metanom, kot je bio LNG, ki so skladni z lokalnimi veljavnimi predpisi o sestavi plina ali z zahtevami glede kakovosti plina po ISO 13686.
Dokument zajema vso opremo od priključka za razkladanje rezervoarja za LNG do (vendar ne vključno) polnilne šobe na vozilu. Sam priključek za razkladanje rezervoarja za LNG in polnilna šoba na vozilu nista zajeta v tem dokumentu.
Dokument se uporablja za polnilne postaje z naslednjimi značilnostmi:
- zasebni dostop;
- javni dostop (samooskrba ali pomoč);
- merjeno in nemerjeno točenje;
- polnilne postaje s fiksnim skladiščenjem LNG;
- polnilne postaje z mobilnim skladiščenjem LNG;
- premične polnilne postaje;
- mobilne polnilne postaje;
- večgorivne postaje.
Ta dokument ne velja za:
- opremo, cevovode ali cevi, ki so nižje od regulatorja tlaka plina za zaprte sisteme za odparevanje plina;
- opremo za utekočinjanje.
General Information
- Status
- Published
- Public Enquiry End Date
- 01-Mar-2025
- Publication Date
- 13-Apr-2026
- Technical Committee
- DPL - Gas supply
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 08-Apr-2026
- Due Date
- 13-Jun-2026
- Completion Date
- 14-Apr-2026
Relations
- Effective Date
- 01-May-2026
- Effective Date
- 01-May-2026
Overview
FprEN ISO 16924 (based on ISO 16924:2016 / ISO/DIS 16924:2024) provides guidance for the design, construction, operation, maintenance and inspection of liquefied natural gas (LNG) fuelling stations for road vehicles. The standard also covers LCNG stations where LNG is used onsite as a source for compressed natural gas (CNG). It applies to stations receiving LNG and other liquefied methane‑rich gases in accordance with local gas composition rules or ISO 13686 gas quality.
The document addresses equipment and safety systems from the LNG storage tank filling connection up to the vehicle fuelling nozzle, with the filling connection itself and the vehicle nozzle explicitly excluded. Station types covered include private and public access (self‑service or assisted), metered and non‑metered dispensing, fixed or mobile storage, movable/mobile fuelling units and multi‑fuel configurations.
Key Topics
- Risk management: requirements for risk assessment, overpressure protection, static electricity control, fire and explosion protection and hazardous area classification.
- General design: design philosophy, buildings and civil works, installation and construction best practices, site layout, separation distances, traffic management and security considerations.
- Fuel supply & storage: equipment compatibility, filling connector provisions, prevention of overfilling and backflow, draining and tanker interface; design and safety requirements for LNG storage and CNG buffer storage.
- Pumps, compressors and dispensers: guidance for LNG pumps (centrifugal and reciprocating), compressor considerations for natural gas, dispenser design, breakaway systems and hose requirements.
- Operation, maintenance & inspection: planned inspection regimes, maintenance of safety and control devices, documentation and labelling, and personnel competency expectations.
Applications
FprEN ISO 16924 is intended for stakeholders involved in the lifecycle of vehicle fuelling stations using LNG or LCNG, including:
- Station designers and engineers specifying storage, pumps and dispensers.
- Site owners and operators implementing safety and maintenance programmes.
- Manufacturers of LNG station equipment and control systems.
- Regulators and inspectors referencing harmonised safety and inspection practices.
Practical benefits include improved safety performance, clearer requirements for equipment selection and installation, consistent inspection criteria, and support for regulatory compliance and operational reliability.
Related Standards
- ISO 16923 - addresses specific CNG equipment used at fuelling stations (relevant where LCNG systems are implemented).
- ISO 13686 - defines gas quality requirements for certain natural gas compositions referenced by ISO 16924.
For projects involving LNG/LCNG fuelling infrastructure, FprEN ISO 16924 should be used alongside national regulations and complementary ISO/CEN documents to ensure a compliant, safe and operationally robust installation.
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Frequently Asked Questions
SIST EN ISO 16924:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Natural gas fuelling stations - Liquefied natural gas (LNG) stations for fuelling road vehicles (ISO 16924:2026)". This standard covers: This document specifies requirements for the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices. This document also specifies the design, construction, operation, maintenance and inspection of fuelling stations using LNG as an onsite source for supplying compressed natural gas (CNG) to vehicles, commonly referred to as liquefied-to-compressed natural gas (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. This document is applicable to fuelling stations receiving LNG and other liquefied methane-rich gases such as bio LNG which comply with local applicable gas composition regulations or with the gas quality requirements of ISO 13686. This document covers all equipment from the LNG storage tank unloading connection up to (but not including) the fuelling nozzle on the vehicle. The LNG storage tank unloading connection itself and the vehicle fuelling nozzle are not covered in this document. This document applies to 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. This document does not apply to: equipment, piping, or tubing downstream of the gas pressure regulator for closed boil-off gas systems; liquefaction equipment.
This document specifies requirements for the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices. This document also specifies the design, construction, operation, maintenance and inspection of fuelling stations using LNG as an onsite source for supplying compressed natural gas (CNG) to vehicles, commonly referred to as liquefied-to-compressed natural gas (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. This document is applicable to fuelling stations receiving LNG and other liquefied methane-rich gases such as bio LNG which comply with local applicable gas composition regulations or with the gas quality requirements of ISO 13686. This document covers all equipment from the LNG storage tank unloading connection up to (but not including) the fuelling nozzle on the vehicle. The LNG storage tank unloading connection itself and the vehicle fuelling nozzle are not covered in this document. This document applies to 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. This document does not apply to: equipment, piping, or tubing downstream of the gas pressure regulator for closed boil-off gas systems; liquefaction equipment.
SIST EN ISO 16924:2026 is classified under the following ICS (International Classification for Standards) categories: 75.060 - Natural gas; 75.200 - Petroleum products and natural gas handling equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 16924:2026 has the following relationships with other standards: It is inter standard links to SIST EN ISO 16924:2018, SIST ISO 16924:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 16924:2026 is associated with the following European legislation: EU Directives/Regulations: 2014/94/EU; Standardization Mandates: M/533. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN ISO 16924:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2026
Nadomešča:
SIST EN ISO 16924:2018
SIST ISO 16924:2017
Polnilne postaje za oskrbo z zemeljskim plinom - Postaje za oskrbo vozil z
utekočinjenim zemeljskim plinom (LNG) (ISO 16924:2026)
Natural gas fuelling stations - Liquefied natural gas (LNG) stations for fuelling road
vehicles (ISO 16924:2026)
Gasfüllanlagen - LNG Füllanlagen zur Betankung von Fahrzeugen (ISO 16924:2026)
Stations-service de gaz naturel - Stations de gaz naturel liquéfié (GNL) pour le
ravitaillement de véhicules routiers (ISO 16924:2026)
Ta slovenski standard je istoveten z: EN ISO 16924:2026
ICS:
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 ISO 16924
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2026
EUROPÄISCHE NORM
ICS 75.200 Supersedes EN ISO 16924:2018
English Version
Natural gas fuelling stations - Liquefied natural gas (LNG)
stations for fuelling road vehicles (ISO 16924:2026)
Stations-service de gaz naturel - Stations de gaz naturel Gasfüllanlagen - LNG Füllanlagen zur Betankung von
liquéfié (GNL) pour le ravitaillement de véhicules Fahrzeugen (ISO 16924:2026)
routiers (ISO 16924:2026)
This European Standard was approved by CEN on 4 January 2026.
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16924:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 16924:2026) has been prepared by Technical Committee ISO/TC 340 "Natural
gas fuelling stations" in collaboration with 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 July 2026, and conflicting national standards shall be
withdrawn at the latest by July 2026.
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 supersedes EN ISO 16924:2018.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, 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.
Endorsement notice
The text of ISO 16924:2026 has been approved by CEN as EN ISO 16924:2026 without any modification.
International
Standard
ISO 16924
Second edition
Natural gas fuelling stations —
2026-01
Liquefied natural gas (LNG) stations
for fuelling road vehicles
Stations-service de gaz naturel — Stations de gaz naturel liquéfié
(GNL) pour le ravitaillement de véhicules routiers
Reference number
ISO 16924:2026(en) © ISO 2026
ISO 16924:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 16924:2026(en)
Contents Page
Foreword .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Abbreviated terms . 10
5 Risk management .11
5.1 Risk assessment .11
5.1.1 General .11
5.1.2 Protection against overpressure .11
5.1.3 Static electricity . 12
5.2 Fire protection . 12
5.2.1 Fire protection measures . 12
5.2.2 Fire fighting . 13
6 General design provisions .13
6.1 General . 13
6.1.1 Design philosophy . 13
6.1.2 Buildings and civil works .14
6.1.3 Installation and construction . 15
6.2 Site layout .16
6.2.1 Separation distances .16
6.2.2 Traffic management . .16
6.2.3 Security . .16
6.2.4 Location of equipment .17
6.3 Environmental considerations .17
6.3.1 Noise attenuation .17
6.3.2 Prevention of venting of natural gas .17
7 Fuel supply to the fuelling station .18
7.1 Application .18
7.2 Equipment compatibility .18
7.3 Unloading connector .18
7.4 Requirements for unloading .18
7.4.1 Personnel and supervision .18
7.4.2 Emergency stop systems (ESDs) .19
7.4.3 Unloading process conditions. 20
7.4.4 Hose and connection requirements . 20
7.4.5 Prevention of over-pressurization and overfilling . 20
7.5 Prevention of back flow .21
7.6 Bleed connections .21
7.7 Draining of liquid from the liquefied natural gas (LNG) storage tank .21
7.8 Liquefied natural gas (LNG) tanker .21
7.8.1 Immobility . .21
7.8.2 Turning off the engine .21
7.8.3 Equalizing the potentials .21
8 Storage .22
8.1 Liquefied natural gas (LNG) storage . . 22
8.1.1 Design and construction . 22
8.1.2 Safety requirements .24
8.1.3 Installation guidance .27
8.2 Compressed natural gas (CNG) storage .27
9 Pumps and compressors .28
9.1 General . 28
9.1.1 The design requirement for safe operation . 28
iii
ISO 16924:2026(en)
9.1.2 Vibration . 28
9.1.3 Connection of liquefied natural gas (LNG) pumps to the LNG storage tank . 28
9.1.4 Net positive suction head (NPSH) requirements . 28
9.1.5 Vapour return . 28
9.1.6 Protection against weather . 28
9.1.7 Accessibility . 28
9.2 Liquefied natural gas (LNG) centrifugal pump (including ancillaries) . 28
9.2.1 General provisions . 28
9.2.2 Liquid inlet to the centrifugal pump . 29
9.2.3 Centrifugal pump design . 29
9.2.4 Detection of shaft seal leak . 29
9.2.5 Detection of cavitation . 29
9.3 Liquefied natural gas (LNG) reciprocating pump for LCNG fuelling stations (including
ancillaries) . 29
9.3.1 General provisions . 29
9.3.2 Liquid supplied to the reciprocating pump . 30
9.3.3 Design . 30
9.3.4 Pulsation . 30
9.4 Commonalities for liquefied natural gas (LNG) centrifugal and reciprocating pumps . . 30
9.4.1 Suction line . 30
9.4.2 Instrumentation. 30
9.4.3 Markings of a pump . 30
9.4.4 Instructions .31
9.5 Natural gas compressor.31
10 Dispensers .31
10.1 Liquefied natural gas (LNG) dispensers .31
10.1.1 General requirements .31
10.1.2 Breakaway system . . 33
10.1.3 Fuelling hoses . 33
10.1.4 Fuelling nozzles . 34
10.1.5 Dispenser enclosure . 35
10.1.6 Other requirements . 35
10.2 Compressed natural gas (CNG) dispensers . 36
11 Vaporizers and heaters .36
11.1 Application . 36
11.2 Design of vaporizers and heaters .37
11.3 Ambient air vaporizer .37
11.3.1 General .37
11.3.2 Defrosting .37
11.3.3 Aluminium vaporizers . 38
11.4 Electric vaporizer or heater . 38
11.5 Water bath vaporizer . 38
12 Odorization .38
12.1 General requirements . 38
12.2 High-pressure odorizer. 38
12.3 Safety. 39
12.4 Monitoring . 39
12.5 Odorant. 40
12.5.1 Dynamics of function . 40
13 Pipework.40
13.1 General . 40
13.2 Pipework design . 40
13.2.1 General . 40
13.2.2 Overground pipework .41
13.2.3 Underground pipework .41
13.2.4 Pipework in ducts .41
13.2.5 Flexible connections . . .42
iv
ISO 16924:2026(en)
14 Electrical equipment and wiring .42
14.1 General .42
14.2 Main considerations.42
14.2.1 Grounding .42
14.2.2 Lightning .42
14.2.3 Contact with live parts . . .42
14.2.4 Cables . .42
14.2.5 Static electricity .43
14.3 Other considerations .43
14.3.1 Interface .43
14.3.2 Primary seal .43
14.3.3 Additional seal .43
14.3.4 Conduit seals .43
14.3.5 Detection vents . 44
15 Instrumentation and control system .44
15.1 General . 44
15.2 Gas detectors . 44
15.3 Flame detectors . 44
15.4 Pressure gauges . 44
15.5 Temperature sensors . 44
15.6 Manual emergency shutdown devices . 44
15.7 Uninterruptible power supply unit (UPS) .45
16 Emergency shutdown .45
16.1 Application .45
16.2 Procedure .45
16.3 Activation .45
16.4 Emergency shut-down (ESD) action . 46
16.5 Reset . 46
17 Special configurations .46
17.1 Movable liquefied natural gas (LNG) fuelling station . . 46
17.1.1 General requirements . 46
17.1.2 Anchoring . 46
17.1.3 Containment .47
17.1.4 Configurations .47
17.2 Mobile liquefied natural gas (LNG) fuelling station .47
17.2.1 General requirements .47
17.2.2 Anchoring .47
17.2.3 Containment .47
17.2.4 Design .47
17.2.5 Additional requirements for operation . 48
18 Testing and commissioning .48
18.1 Testing . 48
18.1.1 Electrical testing . 48
18.1.2 Pressure strength testing . 48
18.1.3 Leak testing. 49
18.2 Commissioning . 49
18.2.1 General provisions . 49
18.2.2 Purging . 49
18.2.3 Functional testing . 49
18.2.4 First filling of the liquefied natural gas (LNG) storage tank and other
components . 50
19 Operations .50
19.1 Liquefied natural gas (LNG) tanker unloading . 50
19.2 Fuelling procedure . 50
19.3 Safety signs . 50
19.3.1 General on identification labels . 50
v
ISO 16924:2026(en)
19.3.2 Equipment marking .51
19.4 Equipment and pipework identification .52
19.5 Training .52
19.6 Installation and operating instructions .52
19.7 Emergency plan . 53
19.8 Maintaining the emergency shutdown (ESD) . 53
20 Inspection and maintenance .53
20.1 Inspection . 53
20.1.1 General requirements . 53
20.1.2 Inspection and testing of electrical systems . 54
20.1.3 Inspection and re-testing of the safety relief valves . 54
20.1.4 Safety and fire protection equipment . 55
20.2 Maintenance . 55
20.2.1 Preventive maintenance planning . 55
20.2.2 Maintenance procedures. 56
20.2.3 Maintenance safety . 56
20.2.4 Draining of the liquefied natural gas (LNG) storage tank . 56
Annex A (informative) Examples of hazardous zones classification .57
Annex B (normative) Separation distances . 61
Annex C (informative) Example flow diagram of a liquefied natural gas (LNG) fuelling station .65
Annex D (informative) Example flow diagram of a liquefied-to-compressed natural gas (LCNG)
fuelling station .66
Annex E (informative) Example flow diagram of a liquefied natural gas (LNG) and liquefied-to-
compressed natural gas (LCNG) fuelling station . 67
Annex F (informative) Process requirements for the effective cryogenic pump operation .70
Annex G (informative) Recommendations for installation of a centrifugal pump .71
Annex H (informative) Recommendations for centrifugal pump design .73
Annex I (informative) Recommendations for installation of a reciprocating pump . 74
Annex J (informative) Recommendations on the content of the cryogenic pump operation
instructions .77
Annex K (informative) Liquefied natural gas (LNG) identification mark of an LNG fuelling
station .
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