ISO 15501-2:2025 PDF

Name: ISO 15501-2:2025 — Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods
SKU: ISO 15501-2:2025
Price: 25 EUR
Availability: InStock

Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods

Название (английский):

ISO 15501-2:2025

Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 1 декабря 2025 г.
Издание:: ISO IS 15501 edition 3 version 1
ICS:: 43.060.40

Тип поставки:

Full version120 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:120 €

Описание (английский):

This document specifies the test methods for checking the minimum safety requirements specified in ISO 15501-1. It is applicable to the functionality of the fuel systems designed to operate on compressed natural gas of motor vehicles as defined in ISO 3833. NOTE For tests of individual components, refer to the ISO 15500 series, ISO 14469 and ISO 11439.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 15501-2:2025 - Road vehicles - Compressed natural gas (CNG) fuel systems - Part 2: Test methods - specifies standardized test methods to verify the minimum safety and functional requirements given in ISO 15501-1 for vehicle CNG fuel systems. It applies to fuel systems fitted to motor vehicles as defined in ISO 3833 and covers system-level tests (cylinder mounting, leak, functional and receptacle mounting tests) rather than individual component qualification (see ISO 15500 series).

Key topics and technical requirements

Cylinder mounting strength tests

Inertia test: cylinders mounted to the vehicle (or representative part) are filled (≥90% mass equivalent) and subjected to a specified deceleration profile measured with instrumentation conforming to ISO 6487 (CFC 60); deceleration must be maintained for at least 30 ms.
Static test: a traction force is applied to the cylinder centre of gravity and held; the force is defined by F = (M + 0,9 ρV) a where M = empty mass, V = cylinder volume and ρ = CNG density (document reference value).
Alternative methods: homologous crash tests or validated calculation methods may be accepted if equivalence is demonstrated.
Acceptance: cylinders shall remain attached to the vehicle structure and must not interfere with seat structures after testing. Annex A contains engineering guidance for steel (type 1) cylinder mountings (fastener sizes, reinforcement plates, clamping/retention practice).

Leak test

Performed after system installation: pressurize upstream of the first-stage regulator to 1.0 MPa ±0.1 MPa, check all connections with gas detector or foam for the specified hold time, then repeat at service pressure. Any detected leaks must be repaired and the system re-tested.

Functional tests

Main shut-off valve: verify the valve closes reliably when ignition is off, the engine stalls, cranking on non‑CNG fuel, or when the engine is not running on CNG.
Receptacle clearance: ensure free space around the fuelling receptacle conforms to ISO 15501-1 requirements.

Receptacle mounting tests

With the nozzle connected and system at service pressure, apply a defined longitudinal pull (670 N) and a worst-case moment (200 N·m); gas tightness must not be impaired and shall be rechecked per the leak test.

Applications and who uses this standard

ISO 15501-2:2025 is intended for:

OEM engineering teams designing CNG vehicle fuel systems

After‑market converters and installers validating retrofit systems

Test laboratories and conformity assessment bodies performing system-level safety tests

Certification authorities, fleet operators and maintenance organizations requiring objective test methods for CNG systems

Use of ISO 15501-2 helps ensure consistent, reproducible verification of CNG system safety and functionality for vehicle certification, product validation and compliance.

Related standards

ISO 15501-1:2025 (Safety requirements for CNG fuel systems)

ISO 15500 series (CNG fuel system components)

ISO 11439, ISO 14469 (component/cylinder standards)

ISO 6487 (impact measurement instrumentation)

ISO 3833 (vehicle classification/definitions)

Keywords: ISO 15501-2:2025, CNG fuel systems, test methods, cylinder mounting strength, leak test, receptacle mounting, road vehicles, compressed natural gas.

ISO 15501-2:2025 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses this standard

Related standards

Технические детали

ISO 15501-1:2025

Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements

ISO 15501-1:2016/Amd 1:2021

Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements — Amendment 1

SIST ISO 3833:2000

Road vehicles -- Types -- Terms and definitions

BS ISO 15500-7:2015

Road vehicles. Compressed natural gas (CNG) fuel system components. Gas injector.

ISO 6487:2015/Amd 1:2017

Road vehicles — Measurement techniques in impact tests — Instrumentation — Amendment 1

ISO 15501-2:2001

Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods

ISO 11439:2013/Amd 1:2021

Gas cylinders — High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehi…

SIST EN ISO 14469:2017

Road vehicles - Compressed natural gas (CNG) refuelling connector (ISO 14469:2017)