ISO 15500-15:2015
(Main)Road vehicles - Compressed natural gas (CNG) fuel system components - Part 15: Gas-tight housing and ventilation hose
Road vehicles - Compressed natural gas (CNG) fuel system components - Part 15: Gas-tight housing and ventilation hose
ISO 15500-15:2015 specifies tests and requirements for the gas-tight housing and ventilation hose, compressed natural gas fuel system components intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to the following: a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as a fuel of 20 MPa (200 bar[1]) 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. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Véhicules routiers — Composants des systèmes de combustible gaz naturel comprimé (GNC) — Partie 15: Compartiment étanche pour gaz et tuyaux de ventilation
General Information
- Status
- Published
- Publication Date
- 18-Oct-2015
- Technical Committee
- ISO/TC 22/SC 41 - Specific aspects for gaseous fuels
- Current Stage
- 9092 - International Standard to be revised
- Start Date
- 14-Feb-2023
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 25-Oct-2014
Overview
ISO 15500-15:2015 is an international standard specifying the requirements and test methods for gas-tight housing and ventilation hoses used in compressed natural gas (CNG) fuel systems of road vehicles. It applies to motor vehicles defined under ISO 3833 that utilize natural gas fuel compliant with ISO 15403-1 in mono-fuel, bi-fuel, or dual-fuel configurations. This standard ensures safety, performance, and reliability of critical CNG fuel system components designed to contain and safely vent natural gas emissions, primarily focusing on gas-tight compartments and ventilation hoses.
The standard excludes components related to liquefied natural gas (LNG) systems upstream of the vaporizer, fuel containers, stationary engines, mounting hardware, electronic fuel management systems, and refuelling receptacles.
Key Topics
Scope and Application
Applies exclusively to CNG fuel system components in vehicles using compressed natural gas at service pressures typically around 20 MPa (200 bar) and 15 °C. The pressures can be adjusted for different service conditions.Marking Requirements
Components must be clearly marked with manufacturer identification, part/model number, temperature range, and other recommended information such as flow direction, fuel type, electrical ratings, certification symbols, and approval codes to ensure traceability and proper installation.Construction and Assembly
The gas-tight housing and ventilation hoses must comply with general requirements of ISO 15500-1 & ISO 15500-2, ensuring proper assembly that does not interfere with pressure relief devices (PRDs). These parts serve to contain and vent permeation gas and minor leaks safely.Test Methods and Performance Criteria
Rigorous testing is mandated to verify leakage resistance, venting ability, structural integrity, and endurance:- Leakage Tests: External leakage at various temperatures (-40°C to 85°C) and pressures (0.05 MPa). Ensures no unintended gas escape except through designated pathways.
- Venting Ability and Pressure Retention: Ensures gas-tight housings and hoses vent safely without excessive pressure build-up during leaks, retaining less than 50 kPa pressure.
- Pull-off Strength: Ventilation hoses must withstand a minimum tensile force of 100 N before detachment, ensuring secure connections under operational stresses.
Compliance and Traceability
Markings and testing protocols support consistent quality control and compliance with safety regulations across diverse vehicle applications.
Applications
ISO 15500-15:2015 is critical for manufacturers, suppliers, and regulators involved in the design, testing, and certification of CNG fuel system components in road vehicles, supporting:
- Passenger vehicles equipped with CNG fuel systems (mono-fuel, bi-fuel, dual-fuel)
- Commercial vehicles and buses using compressed natural gas as an alternative fuel
- Ensuring safe venting and containment of natural gas to prevent leaks and reduce fire or explosion risks
- Supporting the development of environmentally friendly and sustainable transportation by promoting natural gas as a cleaner alternative fuel
- Assisting quality assurance and product development teams in verifying component performance under operational conditions
- Facilitating compliance with international safety regulations and enhancing consumer confidence in CNG vehicle safety
Related Standards
ISO 15500-15:2015 is part of the broader ISO 15500 series focused on CNG fuel system components, which includes:
- ISO 15500-1: General requirements and definitions for CNG components
- ISO 15500-2: Performance and general test methods
- ISO 15500-3 to ISO 15500-20: Covering specific components such as valves, injectors, pressure regulators, fuel lines (rigid and flexible), filters, fittings, and additional safety devices like pressure relief valves
Other connected standards include:
- ISO 3833: Definitions and terms for road vehicle types
- ISO 15403-1: Quality designation for natural gas used as compressed fuel
Together, these standards harmonize technical requirements to ensure interoperability, safety, and performance of CNG fuel systems worldwide.
Keywords: ISO 15500-15, CNG fuel system components, compressed natural gas, gas-tight housing, ventilation hose, road vehicles, natural gas vehicle safety, CNG leakage tests, pressure retention, fuel system standards, vehicle fuel system components.
Frequently Asked Questions
ISO 15500-15:2015 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Compressed natural gas (CNG) fuel system components - Part 15: Gas-tight housing and ventilation hose". This standard covers: ISO 15500-15:2015 specifies tests and requirements for the gas-tight housing and ventilation hose, compressed natural gas fuel system components intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to the following: a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as a fuel of 20 MPa (200 bar[1]) 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. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
ISO 15500-15:2015 specifies tests and requirements for the gas-tight housing and ventilation hose, compressed natural gas fuel system components intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to the following: a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as a fuel of 20 MPa (200 bar[1]) 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. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
ISO 15500-15:2015 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 15500-15:2015 has the following relationships with other standards: It is inter standard links to ISO 15500-15:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 15500-15:2015 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 ISO
STANDARD 15500-15
Second edition
2015-10-15
Road vehicles — Compressed natural
gas (CNG) fuel system components —
Part 15:
Gas-tight housing and ventilation hose
Véhicules routiers — Composants des systèmes de combustible gaz
naturel comprimé (GNC) —
Partie 15: Compartiment étanche pour gaz et tuyaux de ventilation
Reference number
©
ISO 2015
© ISO 2015, 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. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking . 2
5 Construction and assembly . 2
6 Tests . 2
6.1 Applicability . 2
6.2 Leakage . 3
6.2.1 External leakage . 3
6.2.2 External Leakage, of pressure retaining ventilation passages . 3
6.2.3 Venting ability and pressure retention . 4
6.3 Pull-off . 4
Bibliography . 5
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects for gaseous fuels.
This second edition cancels and replaces the first edition (ISO 15500-15:2001), which has been
technically revised.
ISO 15500 consists of the following parts, under the general title Road vehicles — Compressed natural
gas (CNG) fuel system components :
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Check valve
— Part 4: Manual valve
— Part 5: Manual cylinder valve
— Part 6: Automatic valve
— Part 7: Gas injector
— Part 8: Pressure indicator
— Part 9: Pressure regulator
— Part 10: Gas-flow adjuster
— Part 11: Gas/air mixer
— Part 12: Pressure relief valve (PRV)
— Part 13: Pressure relief device (PRD)
iv © ISO 2015 – All rights reserved
— Part 14: Excess flow valve
— Part 15: Gas-tight housing and ventilation hose
— Part 16: Rigid fuel line in stainless steel
— Part 17: Flexible fuel line
— Part 18: Filter
— Part 19: Fittings
— Part 20: Rigid fuel line in material other than stainless steel
INTERNATIONAL STANDARD ISO 15500-15:2015(E)
Road vehicles — Compressed natural gas (CNG) fuel
system components —
Part 15:
Gas-tight housing and ventilation hose
1 Scope
This part of ISO
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...