《BS 2M 53-1997 ISO 6773-1994.pdf》由会员分享，可在线阅读，更多相关《BS 2M 53-1997 ISO 6773-1994.pdf（12页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD AEROSPACE SERIES BS 2M 53:1997 ISO 6773:1994 Aircraft Fluid systems Thermal shock testing of piping and fittings ICS 49.080 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53:1997 This British Standard, having been pre
2、pared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 04-2000 ISBN 0 580 28786 6 National foreword This British Standard reproduces verbatim ISO 6773:1994 and implements it as the UK national
3、standard. It supersedes BS M 53:1983 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace hydraulic systems, fluids and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible internat
4、ional/European committee any enquiries on the interpretation, or proposals for change, and keep the UK 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 se
5、cretary. Cross-references The British Standards which implement international or European publications 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 Standa
6、rds Electronic Catalogue. A British Standard does not purport to include all the necessary provisions 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 page
7、s This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages 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 insid
8、e front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53:1997 BSI 04-2000i Contents Page National forewordInside front cover Forewordiii Text of ISO 67731 Licensed Copy:
9、 sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolle
10、d Copy, (c) BSI BS 2M 53:1997 ii BSI 04-2000 Contents Page Forewordiii 1Scope1 2Normative reference1 3Required characteristics1 4Method of test1 Figure 1 Thermal shock test apparatus2 Descriptors: Aircraft, aircraft equipment, hydraulic systems, fluid circuits, piping, pipes (tubes), pipe fittings,
11、tests, thermal shock tests. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53:1997 BSI 04-2000iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bod
12、ies). 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
13、 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. Draft International Standards adopted by the technical committees are circulated to the member bod
14、ies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 6773 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components. Thi
15、s second edition cancels and replaces the first edition (ISO 6773:1982), the figure of which has been technically revised and the text clarified in places. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun s
16、heffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53:1997 BSI 04-20001 1 Scope This International Standard provides an environmental test method for thermal shock testing of fluid system piping and fittings, excluding hose and hose assemblies. 2 Normative reference
17、 The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard
18、are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6772:1988, Aerospace Fluid systems Impulse testing of hydraulic hose, tubing and fitting assemb
19、lies. 3 Required characteristics The test assemblies shall not leak or burst during temperature and pressure cycling procedures described in clause 4. 4 Method of test 4.1 Test apparatus The test assemblies shall be mounted in a test fixture similar to that shown in Figure 1 capable of providing the
20、 specified test fluid, ambient temperatures and circuit pressures corresponding to the system classification specified in ISO 6772. 4.2 Test fluid The specified test fluid shall be a system fluid or hydraulic fluid which is compatible with the item being tested and the specified system pressure and
21、temperature. 4.3 Hot test chamber testing Mount the test assemblies in a temperature chamber, connect them to a pressure source and fill them with the specified test fluid. Then pressurize the assemblies to at least the nominal circuit service pressure and raise the temperature in the test chamber t
22、o at least the maximum specified for the circuit. Hold this temperature for a minimum of 2 h. At the end of this period, while still at at least the maximum temperature, release the hot test fluid and replace it within 20 s with test fluid initially at or below the minimum specified temperature. Wit
23、hin an additional 20 s, raise the test pressure to at least proof pressure and maintain this pressure for at least 1 min and then release it for at least an additional 1 min. Then repeat the 1-min proof test. Observe the assemblies continuously during the two 1-min pressurization periods to determin
24、e any leakage. 4.4 Cold test chamber testing Following a cooling period to room temperature, re-apply at least the nominal circuit pressure and lower the chamber temperature to at least the minimum specified. Hold this temperature for a minimum of 2 h. At the end of this period while still at low te
25、mperature, release the cold fluid and replace it with test fluid initially at at least the maximum circuit temperature within 20 s. Within an additional 20 s, raise the pressure to the proof pressure specified for the circuit, and maintain this pressure for at least 1 min. Observe the specimens clos
26、ely to determine any leakage. 4.5 Test schedule The procedures described in 4.3 or 4.4 shall be repeated in sequence three times to complete the requirements of the thermal shock test. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53
27、:1997 2 BSI 04-2000 NOTEThe graphic symbols conform to ISO 1219-1:1991, Fluid power systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols. Figure 1 Thermal shock test apparatus Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled
28、Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 53:1997 ISO 6773:1994 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British
29、 Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the
30、 constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cove
31、r. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to
32、 Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of i
33、nformation on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 0
34、20 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsis
35、ts in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any
36、means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other
37、 purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI