ISO 12584:2013 航空宇宙—油圧作動油コンポーネント—粒子汚染レベルの表現 | 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. 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. 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.

The committee responsible for this document is ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components.

Introduction

The reliability of fluid circuits depends largely on the quantity and size of the particles conveyed by the fluid.

The cleanliness of the operating fluid is obtained and maintained by filtration at a level consistent with the sensitivity of the system components to particulate contamination and the life and reliability required by the operator of the system.

The cleanliness of the system at start-up is dependent on the cleanliness of the components as delivered, the amount of contamination added during the build process, the cleanliness of the hydraulic liquid used to fill the system, and how successful the liquid was in penetrating the clearances. The amount of contamination added from these processes must be controlled to minimize the damage to the system during the initial running period. Cleanliness specifications are fundamental to this.

This International Standard defines the terminology used in and the method of reporting and communicating the cleanliness of components used in aerospace fluid systems. This will ensure consistent and unambiguous reporting.

It also presents a coding system which allows cleanliness data to be reported either in a shortened manner or in a complete manner for communication purposes or for specifying cleanliness requirements.

1 Scope

This International Standard defines the method of reporting and communicating the contamination (or cleanliness) level of components used in aerospace fluid systems.

It also presents a coding system which allows cleanliness data to be reported, both in a shortened manner and in a complete manner, when communicating for reporting contamination level measurement results and for specifying cleanliness requirements.

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