EN ISO 16924:2026
(Main)Natural gas fuelling stations - Liquefied natural gas (LNG) stations for fuelling road vehicles (ISO 16924:2026)
General Information
- Abstract
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.
- Status
- Published
- Publication Date
- 27-Jan-2026
- Technical Committee
- CEN/TC 326 - Gas supply for Natural Gas Vehicles (NGV)
- Drafting Committee
- CEN/TC 326/WG 4 - LNG Fuelling Stations
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 28-Jan-2026
- Completion Date
- 28-Jan-2026
Overview
EN ISO 16924:2026 specifies comprehensive requirements for the design, construction, operation, maintenance, and inspection of natural gas fuelling stations that dispense liquefied natural gas (LNG) to road vehicles. This European and International Standard, prepared by CEN and ISO, ensures safety, reliability, and efficiency at fuelling stations and is widely applicable to both public and private access sites. It also includes provisions for stations using LNG to produce compressed natural gas (CNG) on-site, also known as liquefied-to-compressed natural gas (LCNG) stations.
The standard covers the infrastructure and equipment between the LNG storage tank unloading connection and the vehicle fuelling nozzle (not including these endpoints). It addresses various configurations such as fixed and mobile LNG storage, metered and non-metered dispensing, public and private access, and multi-fuel station compatibility.
Key Topics
EN ISO 16924:2026 addresses all critical aspects of LNG fuelling station safety and performance:
- Design and Construction: Guidelines for infrastructure robustness, site layout, separation distances, and selection of equipment.
- Safety Devices: Requirements for emergency shutdown systems, fire protection, gas detectors, and control systems to manage the inherent risks of LNG.
- Operation and Maintenance: Procedures for safe handling, periodic inspection, and operational tasks, including tanker unloading, fuelling processes, and emergency response.
- Inspection and Testing: Methods for pressure, leak, and functional testing to ensure ongoing station integrity and compliance.
- Equipment Compatibility: Clarifies requirements for pumps, dispensers, compressors, vaporizers, pipework, electrical installations, and their interfaces to maximize safety and performance.
- Environmental Considerations: Noise attenuation, prevention of unintentional gas venting, and environmentally-sound operation.
- Applicability to Bio LNG: Addresses not just fossil LNG but also bio LNG and other methane-rich gases, provided they meet regulatory composition and gas quality standards (per ISO 13686).
Applications
This standard is essential for a broad range of stakeholders in the natural gas vehicle (NGV) industry:
- Station Designers and Engineers: Ensures that LNG and LCNG stations are built to internationally recognized safety and performance criteria, reducing risks and enabling efficient operations.
- Station Operators and Service Providers: Offers structured maintenance, operational, and emergency procedures, supporting compliance and minimizing downtime.
- Equipment Manufacturers: Sets requirements for the manufacture, testing, and integration of station components such as storage tanks, pumps, dispensers, and vaporizers.
- Fleet Owners and Road Transport Companies: Provides assurance of fuelling station safety and reliability, critical for logistics and vehicle uptime, covering both public and private-access stations.
- Regulatory Authorities and Inspectors: Supplies a harmonized baseline for audits, permitting, and certification of LNG fuelling infrastructure.
The standard covers many types of stations including:
- Public and private access stations
- Metered and non-metered dispensing points
- Stations with fixed and mobile LNG storage tanks
- Movable and mobile fuelling stations
- Multi-fuel stations that may integrate LNG alongside other fuels
Related Standards
Understanding and applying EN ISO 16924:2026 may also involve reference to other key standards:
- ISO 16923: Focuses on CNG fuelling stations, relevant for stations that also dispense compressed natural gas.
- ISO 13686: Specifies natural gas quality requirements-crucial for bio LNG and other alternative methane-rich gases.
- Local and regional regulations: Adherence to national safety, environmental, and gas composition regulations is required in addition to international standard compliance.
By following EN ISO 16924:2026, stakeholders in the LNG vehicle fuelling value chain can achieve safer, more reliable, and efficient operations, supporting the adoption of cleaner transport fuels and contributing to sustainable mobility solutions.
Relations
- Effective Date
- 19-Jan-2023
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
- Effective Date
- 16-Sep-2026
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Frequently Asked Questions
EN ISO 16924:2026 is a standard published by the European Committee for Standardization (CEN). 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.
EN ISO 16924:2026 is classified under the following ICS (International Classification for Standards) categories: 75.200 - Petroleum products and natural gas handling equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 16924:2026 has the following relationships with other standards: It is inter standard links to EN ISO 16924:2018, ISO 10380:2012, ISO 24490:2025, IEC 62305-4:2024, ISO 12617:2015, IEC 62443-3-3:2013, ISO 13709:2009, IEC 61511-1:2016, ISO 21013-3:2016, IEC 60079-0:2017, ISO 4126-3:2020, ISO 20607:2019, IEC 61511-2:2016, ISO 10497:2022, ISO 4126-9:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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.
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
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 .
...