ISO 23297:2017 熱可塑性ホースおよびホースアセンブリ—油圧用途向けのワイヤーまたは合成毛糸で強化された単圧タイプ—仕様 | 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 45, Rubber and rubber products, Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.

This second edition cancels and replaces the first edition (ISO 23297:2008), of which it constitutes a minor revision. The changes compared to previous edition are as follows:

• the title of the document has been changed to refer to thermoplastic hoses and hose assemblies instead of thermoplastics hoses and hose assemblies, in keeping with the text of the document;
• the introduction has been amended to explain the current status of a new ISO standard for abrasion tests on rubber and plastic hose covers;
• Clause 2 has been updated: ISO 1746 and ISO 4672 have been cancelled and replaced by ISO 10619‑1 and 10619-2, respectively; ISO 7326:2006 has been replaced by ISO 7326:2016;
• 7.2.3 and 7.2.6 have been amended to refer to the bend test standards ISO 10619‑1 and ISO 10619‑2;
• 7.2.9 has been amended to refer to ISO 7326:2016;
• 9.1 has been revised to stipulate that the hose manufacturer shall use the latest edition of this document, otherwise the year of publication shall be included in the marking;
• the bibliography has been amended by the deletion of ISO 6945 (standard withdrawn).

Introduction

The abrasion resistance tests for compound and plastic hose covers are not included in this document. ISO 20444 ¹ is intended to specify abrasion tests on rubber and plastic hose covers.

1 Scope

This document specifies requirements for eight classes and two types (construction with adhesive bond between layers and construction without adhesive bond between layers) of wire or synthetic yarn reinforced hydraulic hoses and hose assemblies of nominal size from 3,2 to 31,5. Each class has a single maximum working pressure for all sizes. Such hoses are suitable for use with hydraulic fluids HH, HL, HM, HR, and HV as defined in ISO 6743‑4 at temperatures ranging from −40 °C to +100 °C for grades A and B and −40 °C to +120 °C for grades C and D.

This document does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest maximum working pressure of the components.

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 8330 apply.

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

Bibliography