ISO 15501-1:2025
(Main)Road vehicles - Compressed natural gas (CNG) fuel systems - Part 1: Safety requirements
Road vehicles - Compressed natural gas (CNG) fuel systems - Part 1: Safety requirements
This document specifies the minimum safety requirements applicable for the functionality of compressed natural gas (CNG) on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833. This document is applicable to vehicles using compressed natural gas in accordance with ISO 15403-1, including mono-fuel, bi-fuel or dual-fuel applications, original-production and converted vehicles. All matters relating to the skills of installers and converters have been excluded from this document.
Véhicules routiers — Systèmes d'alimentation en gaz naturel comprimé (GNC) — Partie 1: Exigences de sécurité
General Information
Relations
Overview
ISO 15501-1:2025 - "Road vehicles - Compressed natural gas (CNG) fuel systems - Part 1: Safety requirements" sets the minimum safety requirements for CNG on-board fuel systems used in motor vehicles defined by ISO 3833. Applicable to mono‑fuel, bi‑fuel and dual‑fuel applications (original-production and converted vehicles), the standard covers system functionality for vehicles using compressed natural gas in accordance with ISO 15403-1. The series is based on a nominal service pressure of 20 MPa (200 bar) and focuses on component and system safety - it explicitly excludes installer or converter competence requirements.
Key Topics
ISO 15501-1:2025 addresses essential technical and safety topics for CNG fuel systems, including:
- Design and component requirements - compliance with ISO 11439, ISO 14469 and the ISO 15500 series; environmental and mechanical durability; prevention of corrosion and electrostatic charge.
- Refuelling connection - receptacle location, mounting and minimum receptacle clearance to ensure safe refuelling.
- Leakage control - measures to detect and limit gas leakage from on-board systems.
- Cylinder mounting and protection - secure mounting arrangements and shielding from impact and environmental hazards.
- Heat protection and ignition risk minimization - requirements to reduce fire and ignition hazards near CNG components.
- Venting systems - vent routing, vent line closures, and provisions for pressure relief devices (PRDs) and pressure relief valves (PRVs).
- Electronic control unit (ECU) and electrical connections - system control functions (e.g., automatic shut‑off in case of line break or crash) and protection against electrical disturbances.
- Gas temperature sensors and marking requirements for traceability and safe operation.
The 2025 fourth edition updates normative references, adds ECU and electrical connection requirements, refines receptacle clearance, and incorporates vent line and gas temperature sensor requirements.
Applications
ISO 15501-1 is used by:
- Vehicle manufacturers designing factory-fit CNG systems.
- CNG component suppliers (cylinders, valves, receptacles, PRDs/PRVs, ECUs).
- Conversion companies and designers validating converted vehicles (note: installer skill requirements are excluded).
- Regulators, type-approval authorities and safety engineers assessing compliance and crash/venting behavior.
- Testing laboratories implementing ISO 15501-2 (test methods) for conformity verification. The standard helps ensure safe design, integration and operation of CNG on-board fuel systems across passenger and commercial vehicle categories.
Related standards
- ISO 15501-2 (Test methods)
- ISO 15500 series (CNG components)
- ISO 11439 (High-pressure CNG cylinders)
- ISO 14469 (CNG refuelling connector)
- ISO 15403-1 (CNG fuel quality)
- ISO 3833 (Vehicle types) and relevant electrical/EMC standards (ISO 11451 / ISO 11452 series, ISO 7637)
Keywords: ISO 15501-1:2025, CNG fuel systems, compressed natural gas, on-board fuel system safety, PRD, PRV, ECU, CNG vehicle standards.
Frequently Asked Questions
ISO 15501-1:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Compressed natural gas (CNG) fuel systems - Part 1: Safety requirements". This standard covers: This document specifies the minimum safety requirements applicable for the functionality of compressed natural gas (CNG) on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833. This document is applicable to vehicles using compressed natural gas in accordance with ISO 15403-1, including mono-fuel, bi-fuel or dual-fuel applications, original-production and converted vehicles. All matters relating to the skills of installers and converters have been excluded from this document.
This document specifies the minimum safety requirements applicable for the functionality of compressed natural gas (CNG) on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833. This document is applicable to vehicles using compressed natural gas in accordance with ISO 15403-1, including mono-fuel, bi-fuel or dual-fuel applications, original-production and converted vehicles. All matters relating to the skills of installers and converters have been excluded from this document.
ISO 15501-1:2025 is classified under the following ICS (International Classification for Standards) categories: 43.060.40 - Fuel systems. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 15501-1:2025 has the following relationships with other standards: It is inter standard links to ISO 15501-1:2016, ISO 15501-1:2016/Amd 1:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 15501-1:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
International
Standard
ISO 15501-1
Fourth edition
Road vehicles — Compressed
2025-12
natural gas (CNG) fuel systems —
Part 1:
Safety requirements
Véhicules routiers — Systèmes d'alimentation en gaz naturel
comprimé (GNC) —
Partie 1: Exigences de sécurité
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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or ISO’s member body in the country of the requester.
ISO copyright office
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Email: copyright@iso.org
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 4
4.1 Design .4
4.1.1 General .4
4.1.2 Components .5
4.2 Refuelling connection .7
4.2.1 General .7
4.2.2 Receptacle location .7
4.2.3 Receptacle mounting .7
4.2.4 Minimum receptacle clearance .7
4.3 Leakage control .8
4.4 Mounting of the cylinders .9
4.5 Heat protection .10
4.6 Minimizing risk of gas ignition .10
4.7 Venting system .10
4.7.1 General .10
4.7.2 Ventilation lines for PRDs and PRVs .11
4.7.3 Vent line closures .11
4.8 Gas temperature sensor .11
5 Marking . .11
Annex A (informative) Technical solutions to functional requirements .12
Annex B (informative) Compressed natural gas (CNG) on-board fuel systems .13
Bibliography .15
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects for gaseous fuels.
This fourth edition cancels and replaces the third edition (ISO 15501-1:2016), which has been technically
revised. It also incorporates the Amendment ISO 15501-1:2016/Amd. 1:2021.
The main changes are as follows:
— normative references have been updated;
— terminological entries have been updated;
— the reference to the series PRD has been removed;
— an electronic control unit requirement has been added;
— an electrical connections requirement has been added;
— the minimum receptacle clearance has been updated;
— vent line closures requirements have been added;
— gas temperature sensor requirements have been added.
A list of all parts in the ISO 15501 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
For the purposes of this document, all fuel system components in contact with natural gas have been
considered suitable for natural gas as defined in ISO 15403-1.
When applying this document, it is to be understood that a safety device to prevent overfilling the vehicle's
fuel system is part of the refuelling station. The pressure gauge has not been considered as a safety
component.
When necessary, technical solutions regarding functional requirements are given in Annex A.
This document refers to a service pressure of 20 MPa (200 bar).
5 2
NOTE 1 1 bar = 0,1 MPa = 10 Pa. 1 MPa = 1 N/mm .
NOTE 2 This document is based upon a service pressure for natural gas as fuel of 20 MPa (200 bar) settled at 15 °C.
Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example,
a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25.
v
International Standard ISO 15501-1:2025(en)
Road vehicles — Compressed natural gas (CNG) fuel
systems —
Part 1:
Safety requirements
1 Scope
This document specifies the minimum safety requirements applicable for the functionality of compressed
natural gas (CNG) on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833.
This document is applicable to vehicles using compressed natural gas in accordance with ISO 15403-1,
including mono-fuel, bi-fuel or dual-fuel applications, original-production and converted vehicles.
All matters relating to the skills of installers and converters have been excluded from this document.
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 1176, Road vehicles — Masses — Vocabulary and codes
ISO 7637-1, Road vehicles — Electrical disturbances from conduction and coupling — Part 1: Vocabulary and
general considerations
ISO 7637-2, Road vehicles — Electrical disturbances from conduction and coupling — Part 2: Electrical transient
conduction along supply lines only
ISO 11439, Gas cylinders — High pressure cylinders for the on-board storage of natural gas as a fuel for
automotive vehicles
ISO 11451-1, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 1: General principles and terminology
ISO 11451-2, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 2: Off-vehicle radiation sources
ISO 11451-4, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 4: Harness excitation methods
ISO 11452-1, Road vehicles — Component test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 1: General principles and terminology
ISO 11452-2, Road vehicles — Component test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 2: Absorber-lined shielded enclosure
ISO 11452-3, Road vehicles — Component test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 3: Transverse electromagnetic (TEM) cell
ISO 11452-4, Road vehicles — Component test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 4: Harness excitation methods
ISO 11452-5, Road vehicles — Component test methods for electrical disturbances from narrowband radiated
electromagnetic energy — Part 5: Stripline
ISO 14469, Road vehicles — Compressed natural gas (CNG) refuelling connector
ISO 15500 (all parts), Road vehicles — Compressed natural gas (CNG) fuel system components
ISO 15501-2, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods
ISO 20653, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against foreign
objects, water and access
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1176, ISO 15500-6, ISO 15500-7,
ISO 15500-9, ISO 15500-12, ISO 15500-13, ISO 15500-14 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
service pressure
settled pressure at a uniform gas temperature of 15 °C
Note 1 to entry: The ISO 15501 series is based on a service pressure for natural gas used as fuel of 20 MPa (200 bar),
settled at 15 °C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor
(ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25.
3.2
CNG on-board fuel system
compressed natural gas fuel system comprising cylinder, or cylinders according to ISO 11439, mounting, one
or more refuelling receptacles according to ISO 14469, and the components described in the ISO 15500 series
3.3
main shut-off valve
automatic valve designed to isolate a high-pressure source
3.4
vehicle mass
3.4.1
maximum authorized mass
vehicle mass determined as a maximum by the administrative authority for operating conditions laid down
by that authority
Note 1 to entry: For vehicles coupled with a trailer or a semi-trailer which exerts a significant vertical load on the
coupling device or the fifth wheel, this load, divided by standard acceleration of gravity, is included in the maximum
design total mass or maximum authorized total mass.
Note 2 to entry: For semi-trailers, the maximum authorized total mass including the vertical load on the fifth wheel is
determined by the administrative authority taking into account the characteristics of the towing vehicle.
[SOURCE: ISO 1176:1990, 4.8, modified — The original term was "maximum authorized total mass".]
3.5
vehicle categories
3.5.1
category M
power-driven vehicles having at least four wheels and used for the carriage of passengers
3.5.1.1
category M1
vehicles used for the carriage of passengers and comprising no more than eight seats in addition to the
driver's seat
3.5.1.2
category M2
vehicles used for the carriage of passengers and comprising more than eight seats in addition to the driver's
seat and having a maximum authorized mass (3.4.1) not exceeding 5 000 kg
3.5.1.3
category M3
vehicles used for the carriage of passengers and comprising more than eight seats in addition to the driver's
seat and having a maximum authorized mass (3.4.1) exceeding 5 000 kg
3.5.2
category N
power-driven vehicles having at least four wheels and used for the carriage of goods
3.5.2.1
category N1
vehicles used for the carriage of goods and having a maximum authorized mass (3.4.1) not exceeding 3 500 kg
3.5.2.2
category N2
vehicles used for the carriage of goods and having a maximum authorized mass (3.4.1) exceeding 3 500 kg,
but not exceeding 12 000 kg
3.5.2.3
category N3
vehicles used for the carriage of goods and having a maximum authorized mass (3.4.1) exceeding 12 000 kg
3.6
electronic control unit
ECU
device which controls the compressed natural gas demand of the engine and establishes the cut-off of the
automatic valve in case of a broken fuel supply pipe or in case of stalling of the engine, or during a crash
3.7
pressure relief device
PRD
one-time-use device triggered by excessive temperature or temperature and pressure acting in series or in
parallel which vents gas to protect the cylinder from rupture
3.8
pressure relief valve
PRV
discharge valve
self-closing device which opens to prevent a pre-determined pressure being exceeded
4 Requirements
4.1 Design
4.1.1 General
The compressed natural gas (CNG) on-board fuel system components shall comply with ISO 11439, ISO 14469
and the ISO 15500 series, as applicable.
For bi-fuel vehicles, provisions shall be made to avoid accelerated deterioration of the non-CNG fuel system
as a result of sustained operation on natural gas. Such measures shall be as recommended by the original
vehicle manufacturer (e.g. fuel hoses).
All fuel system components shall fulfill the following conditions.
a) They shall withstand the environmental temperatures and other environmental conditions safely
during their operational life.
b) They shall be located with full regard for anticipated damage while the vehicle is being used safely. Such
damage may be caused by the vehicle itself, by extraneous factors such as heat, road debris, automotive
fluids (e.g. brake liquid, oil, petrol, cooling liquid), or by rust, etc.
c) They shall be fitted so that they are not the outermost, highest or lowest parts of the vehicles; otherwise
they shall be protected.
d) They shall be fitted so as not to affect ground clearance, approach angle, ramp (break-over) angle or
departure angles as defined by the vehicle manufacturer.
e) They shall be located so that they will not suffer corrosion damage by accumulation of water or cargo
chemicals.
f) They shall ensure the proper electrical conductivity throughout the fuel system in order to avoid the
electrostatic charges. This provision does not apply to gas-tight housing and ventilation hose.
g) All connections shall be made in locations where access is possible for inspection.
The CNG system shall be installed in such a way that it has suitable protection against damage, such as
damage due to moving vehicle components, collision, grit or due to the loading or unloading of the vehicle or
the shifting of those loads.
The CNG system shall include automatic valves designed to close when the engine is not running on CNG, and
shall be able to be manually opened or closed in case of failure of the automatism (see Annex B).
The CNG on-board fuel system shall include the following:
— an automatic valve to be installed directly on every CNG cylinder with a manual valve rigidly fixed to the
CNG cylinder, which may be integrated into the automatic valve. The manual valve shall be able to isolate
the cylinder content from the automatic valve;
— a pressure relief device (PRD) installed on each cylinder, functionally independent from any other
component;
— one or more additional PRD as applicable to the approval of the cylinder according to ISO 11439; and
— an excess flow valve inside every cylinder or a functionally equivalent system to control the gas leakage
in the event of an abnormal flow (see Annex A).
The automatic valve shall be closed when:
— the vehicle is not operating on CNG, and
— the engine is not running.
The valve may remain open when the engine stops during the stop phase in start-stop systems where the
valve shall remain open by design.
Only automatic valves that are no
...
ISO 15501-1:2025は、圧縮天然ガス（CNG）燃料システムの安全要件に関する重要な標準です。この文書は、ISO 3833で定義された種類の自動車に適用されるCNG搭載燃料システムの機能性に関する最低限の安全要件を明示しています。従って、この標準はCNGを使用する車両にとって不可欠な基準となります。 この標準の強みは、CNGを利用するさまざまな用途に対して柔軟に対応できることです。単独燃料、バイフューエル、デュアルフューエルのアプリケーションを含むすべての車両タイプに適用可能であり、原始的な生産車両や改造車両にも利用できます。これにより、製造業者や改造業者が安全性を確保しつつ多様な車両ニーズに対応できる基盤が整っています。 さらに、ISO 15501-1:2025は、圧縮天然ガスシステムの設計や実装におけるリスクを軽減するための具体的な指針を提供しており、その結果、消費者や環境への安全性を高める役割を果たしています。この標準は、圧縮天然ガスを使用する自動車の安全性を保障するための重要なツールであり、自動車産業全体における持続可能性の向上にも寄与しています。 なお、文書内では、取り付け業者や改造業者の技能に関する事項は除外されており、実際の運用に焦点を当てています。これにより、技術的な詳細を簡素化し、ユーザーが理解しやすい形に整理されています。 総じて、ISO 15501-1:2025は、圧縮天然ガス（CNG）燃料システムに関わる安全性の確保を強化するための重要な文書であり、業界の標準としての役割を果たしています。自動車の安全で効率的な運用を支えるために必要な要件を明示するこの標準は、今後の自動車技術の発展においても重要な指針となるでしょう。
The ISO 15501-1:2025 standard provides a comprehensive framework for the safety requirements concerning compressed natural gas (CNG) fuel systems used in road vehicles. The scope of the document is clearly defined, making it applicable to various types of vehicles identified in ISO 3833, including those that operate on mono-fuel, bi-fuel, and dual-fuel systems. One of the primary strengths of ISO 15501-1:2025 is its focus on safety requirements, which are critical for enhancing the functionality of CNG on-board fuel systems. By establishing minimum safety standards, this document aims to mitigate risks associated with CNG, ensuring that vehicles equipped with these systems maintain a high level of safety during operation. Moreover, the standard acknowledges the diversity of applications for CNG, covering both original-production vehicles and those that have undergone conversion to utilize this fuel type. This inclusivity reflects the growing trend of alternative fuel use in the automotive industry and reinforces the relevance of the standard as environmental regulations continue to influence vehicle design and fuel selection. Additionally, the exclusion of installer and converter skill requirements from this standard helps to streamline its application, allowing manufacturers and engineers to focus on safety regulations without getting sidetracked by the nuances of installation proficiency. This clarity enhances the standard's usability, making it more accessible for stakeholders involved in the design and production of CNG fuel systems. In summary, ISO 15501-1:2025 stands out due to its well-defined scope, emphasis on safety, adaptability to various vehicle types, and clarity in its directives. These attributes collectively contribute to its importance in the ongoing development and regulation of compressed natural gas applications in the automotive sector.
ISO 15501-1:2025 표준은 압축 천연가스(CNG) 연료 시스템의 안전 요구 사항을 규정하고 있습니다. 이 문서는 ISO 3833에서 정의된 유형의 자동차에서 사용하기 위한 압축 천연가스 시스템의 기능성에 대한 최소 안전 요구 사항을 명시합니다. 이 표준의 주요 강점은 CNG 시스템이구체적으로 안전성을 보장하도록 설계되어 있다는 점입니다. 해당 문서는 단일 연료, 이중 연료 또는 이중 연료 시스템을 사용하는 원래 생산 차량 및 개조 차량을 포함하여 ISO 15403-1에 따라 압축 천연가스를 사용하는 모든 차량에 적용될 수 있어 매우 포괄적입니다. 이는 자동차 산업 내에서 CNG 연료 시스템의 안전성을 높이는 데 기여합니다. 또한, ISO 15501-1:2025는 설치자와 변환자의 기술에 관련된 사항을 제외하고 있기 때문에, 사용자와 제조사 모두에게 명확한 안전 기준을 제공합니다. 이러한 접근 방식은 CNG 연료 시스템의 안전성과 효율성을 보장하는 데 중점을 두고 있으며, 이를 통해 관련 업계에서의 신뢰성을 향상시키는 데 중요한 역할을 합니다. 따라서 ISO 15501-1:2025 표준은 압축 천연가스 시스템의 안전 및 기능성 보장을 위한 필수 문서로, CNG 차량의 확대된 사용과 지속 가능성을 염두에 두고 개발되었습니다. 이 표준은 CNG 연료 시스템의 품질과 안전성을 확보하는 데 큰 기여를 하고 있으며, 앞으로의 성장을 위한 중요한 발판이 될 것입니다.
Le document ISO 15501-1:2025 est une norme essentielle qui établit les exigences de sécurité minimales pour les systèmes de carburant à gaz naturel comprimé (CNG) embarqués dans les véhicules. Son champ d'application est clairement défini, s'adressant aux types de véhicules motorisés identifiés dans la norme ISO 3833. Cette spécification est pertinente pour différents types de configurations de carburants, y compris les applications mono-carburant, bi-carburant ou de carburant alternatif, ainsi que pour les véhicules de production originale et ceux convertis. L'un des points forts de la norme ISO 15501-1:2025 réside dans son approche rigoureuse de la sécurité. En fournissant des exigences de sécurité claires et applicables, elle permet de garantir que les systèmes CNG fonctionnent de manière fiable et sécurisée, minimisant ainsi les risques associés à l'utilisation de gaz naturel dans les véhicules. De plus, cette norme joue un rôle crucial dans la promotion de l'utilisation de carburants alternatifs, offrant une alternative plus propre et respectueuse de l'environnement par rapport aux combustibles fossiles traditionnels. Un autre atout majeur de cette norme est son exclusion des compétences des installateurs et des convertisseurs, ce qui permet de se concentrer spécifiquement sur les exigences techniques et de sécurité des systèmes de carburant CNG. Cela permet d'assurer une uniformité dans la mise en œuvre des exigences de sécurité, facilitant ainsi la conformité à la norme pour les fabricants et les opérateurs de véhicules. En résumé, la norme ISO 15501-1:2025 est d'une grande pertinence pour le secteur automobile, grâce à ses exigences de sécurité claires et sa capacité à encourager l'adoption de solutions de carburant plus durables. Sa focalisation sur les systèmes de carburant à gaz naturel comprimé répond à un besoin croissant de sécurité dans un contexte où l'utilisation de carburants alternatifs devient de plus en plus courante.
Die Norm ISO 15501-1:2025 definiert die Mindestanforderungen an die Sicherheit von Gasversorgungssystemen für Erdgasfahrzeuge (Compressed Natural Gas, CNG). Ihr Anwendungsbereich umfasst eine Vielzahl von Motorfahrzeugen, die gemäß ISO 3833 klassifiziert sind und speziell auf den Betrieb mit CNG ausgelegt sind. Dies beinhaltet sowohl Mono-Gas- als auch Bi-Gas- und Dual-Gas-Anwendungen, sowie Neufahrzeuge und umgerüstete Fahrzeuge. Einer der wesentlichen Stärken dieser Norm ist die klare Festlegung von Sicherheitsanforderungen, die für die praktische Anwendung in der Automobilindustrie entscheidend sind. Durch die spezifische Ausrichtung auf die Funktionalität von CNG-Systemen trägt die ISO 15501-1:2025 dazu bei, das Risiko von Sicherheitsvorfällen zu minimieren. Die Norm stellt sicher, dass alle Fahrzeuge, die CNG nutzen, hinsichtlich ihrer Sicherheit ein einheitliches Niveau erreichen, was wiederum das Vertrauen der Verbraucher in diese Technologie stärkt. Ein weiterer Vorteil der Norm ist ihre Relevanz für eine Vielzahl von Anwendungen, die über die traditionelle Nutzung von Kraftstoffen hinausgehen. Indem sie sowohl Originalprodukte als auch umgerüstete Fahrzeuge berücksichtigt, unterstützt die ISO 15501-1:2025 nicht nur die Neu-Entwicklung von Fahrzeugtechnologien, sondern auch die Anpassung existierender Modelle an umweltfreundlichere Brennstoffe. Diese Flexibilität spiegelt das growing Interesse an nachhaltigen Verkehrslösungen wider und fördert die Akzeptanz von CNG als Alternative zu herkömmlichen Kraftstoffen. Insgesamt ist die ISO 15501-1:2025 ein bedeutendes Dokument, das durch seine umfassenden Sicherheitsanforderungen einen wichtigen Beitrag zur Sicherheit von CNG-Fahrzeugen leistet. Sie zeigt auf, wie durch die Standardisierung von Sicherheitsvorgaben in der Automobilindustrie sowohl Innovation als auch Verbraucherschutz gefördert werden können.
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