ISO 6772:2012 航空宇宙—流体システム—油圧ホース、チューブ、フィッティングアセンブリのインパルステスト | 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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 6772 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components.

This third edition cancels and replaces the second edition (ISO 6772:1988), which has been technically revised. The main changes are as follows:

• 3.2: definition has been modified;
• Clause 5: new paragraph has been added;
• Tables 1, 2 and 3 have been modified to cover additional classes J and K.

Introduction

In hydraulic systems, power is transmitted through the hydraulic fluid under pressure with a network of tubing and hoses, and their attendant fitting assemblies. In order to demonstrate that these transmission elements are fit for purpose in terms of the prevention of premature failures due to fatigue, it is necessary to conduct appropriate impulse pressure testing.

This document provides the overall requirements for pressure impulse testing of hydraulic system distribution elements.

1 Scope

This International Standard specifies the requirements and the procedures for impulse testing of hose, tubing, and fitting assemblies for use in aerospace hydraulic systems. Requirements may apply, when appropriate, to components used in other aerospace fluid systems.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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 following terms and definitions apply.

Bibliography