BS 2M 49-1997 Aircraft Hydraulic components Marking to indicate fluid for which component is approved《航空器 液压组件 已校准组件液体指示标记》.pdf

1、BRITISH STANDARD AEROSPACE SERIES BS 2M 49:1997 ISO 3323:1987 Aircraft Hydraulic components Markingto indicate fluid for which component is approved ICS 49.080BS2M49:1997 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority o

2、f the Standards Board and comesintoeffect on 15November1997 BSI 04-2000 ISBN 0 580 28785 8 National foreword This British Standard reproduces verbatim ISO3323:1987 and implements it as the UK national standard. It supersedes BSM49:1977 which is withdrawn. The UK participation in its preparation was

3、entrusted to Technical CommitteeACE/69, Aerospace hydraulic systems, fluids and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK

4、 interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications

5、 referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions

6、of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pag

7、es ii to iv, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS2M49:1997 BSI 04-2000 i Cont

8、ents Page National foreword Inside front cover Foreword iii Text of ISO 3323 1ii blankBS2M49:1997 ii BSI 04-2000 Contents Page Foreword iii 1 Scope and field of application 1 2 Reference 1 3 Scheme 1 4 Materials, design and manufacture 1 Figure 1 Example of a typical identification plate 1 Figure 2

9、Preferred dimensions of identification plates 2 Descriptors: Aircraft, aircraft equipment, hydraulic equipment, fluid circuits, components, marking.BS2M49:1997 BSI 04-2000 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS

10、O 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, gove

11、rnmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance wi

12、th ISO procedures requiring at least75% approval by the member bodies voting. International Standard ISO 3323 was prepared by Technical Committee ISO/TC20, Aircraft and space vehicles. This second edition cancels and replaces the first edition (ISO3323:1976), of which it constitutes a technical revi

13、sion (particularly with regard to colour of plates or labels). Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated.iv blankBS2M49:1997 BSI 04-2

14、000 1 1 Scope and field of application This International Standard establishes a scheme for the marking of components (other than pipelines, hoses and fittings) used in aircraft hydraulic systems, so that the correct type of fluid is readily apparent during any assembly or testing operations in work

15、shops. The marking is not intended to serve any purpose when a component is installed in an aircraft. NOTEThe requirements for the marking of pipelines and hoses in aerospace vehicles to indicate the type of fluid for which they are approved are given in ISO12. 2 Reference ISO 12, Aerospace Tubes an

16、d pipelines Identification. 3 Scheme A component which is to be fitted in an aircraft hydraulic system shall indicate the type of hydraulic fluid for which it is approved by means of a plate, clearly marked with the name of that type of fluid. The types of hydraulic fluid are as follows: mineral bas

17、e synthetic hydrocarbon base chlorinated silicone base phosphate ester base castor base silicate ester base Optionally, the name and/or specification number of the particular hydraulic fluid may also be marked. An example of a typical plate is shown inFigure 1. The term “label” may be used to descri

18、be the plastic alternative to a metallic plate. The plates (or labels) shall be neutral in colour except those for phosphate ester based fluids which shall be violet in colour as specified in4.4. 4 Materials, design and manufacture 4.1 The identification plate shall be secured to the component in su

19、ch a manner that it is readily visible and will not become detached under normal conditions of use. The plate shall be mechanically secured to the component when it is used to identify fluids likely to corrode glued joints, such as Skydrol chosen as an example inFigure 1. 4.2 If a component is large

20、 enough to accommodate a manufacturers nameplate, provided that the size of the component allows, the identification plate may be incorporated in the manufacturers nameplate. 4.3 The materials used for plates shall be durable and resistant to the effects of the appropriate hydraulic fluids and of th

21、e environmental conditions of use, for example anodized metal or plastics. 4.4 For phosphate ester based fluids, the colour ofthe label shall be violet, identified by chromaticitycoordinates and spectral radiance factor, x = 0,337, y = 0,242 and = 6,5% under CIE 1)Standard illuminant B. 4.5 The dime

22、nsions of the identification plate shall be at the option of the manufacturer or user of the component, commensurate with the dimensions of the hydraulic component. Preferred dimensions are shown inFigure 2. 4.6 The size of the lettering shall be as large as practicable commensurate with the size of

23、 the plate. 1) Commission Internationale de l*clairage (International Commission on Illumination). Figure 1 Example of a typical identification plateBS2M49:1997 2 BSI 04-2000 Dimensions in millimetres l b r 15 5 2,5 30 10 5 50 17 8,5 Figure 2 Preferred dimensions of identification platesblankBS 2M 4

24、9:1997 ISO 3323:1987 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions

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