ISO 15500-17:2021 道路車両—圧縮天然ガス（CNG）燃料システムコンポーネント—パート17：フレキシブル燃料ライン | ページ 2

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.

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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific aspects for gaseous fuels.

This third edition cancels and replaces the second edition (ISO 15500-17:2012), which has been technically revised. It also incorporates the Amendment ISO 15500-17:2012/Amd 1:2016.

The main changes are as follows:

• serial number or data code changed from recommended to mandatory in Clause 4"Marking";
• addition of requirements in Clause 5"Construction and assembly";
• addition of the following tests:
  • automotive fluids,
  • verification of hose cover perforations,
  • vibration resistance.

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. However, it is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this document and tested according to the appropriate functional tests.

All references to pressure in this document are considered to be gauge pressures unless otherwise specified.

This document is based on a service pressure for natural gas used as 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 Scope

This document specifies tests and requirements for the flexible fuel line, a compressed natural gas (CNG) fuel system component in accordance with SAE J517 (100R8 hose) or JIS B 8362 intended for use on the types of motor vehicles defined in ISO 3833.

This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using natural gas in accordance with ISO 15403-1. 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.

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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 15500-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography