BS 2M 59-1993 ISO 7319-1992.pdf

BRITISH STANDARD AEROSPACE SERIES BS 2M 59:1993 ISO 7319:1992 Specification for Interface of metric couplings, 24° cone, for aerospace fluid systems UDC 621.643.414:629.7.064.2/.3 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1993 © BSI 12-1999 First published April 1986 Second edition August 1993 The following BSI references relate to the work on this standard: Committee reference ACE/- Draft for comment 91/77454 DC ISBN 0 580 22500 3 Committees responsible for this British Standard The preparation of this British Standard was undertaken by the Aerospace Standards Policy Committee (ACE/-) upon which the following bodies were represented: British Airways Department of Trade and Industry (Air Division) Institution of Electrical Engineers Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 © BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative reference1 3Coupling assembly and sealing principle1 4Dimensions1 Annex A (informative) Bibliography4 Figure 1 Dimensions2 Table 1 Dimensions3 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 ii © BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO 7319:1992 Aerospace Fluid systems Interface of 24° cone metric couplings, published by the International Organization for Standardization (ISO). This British Standard supersedes BS M 59:1986 which is withdrawn. Cross-reference The Technical Committee has reviewed the provisions of ISO 5855-3:1988, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. 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 pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover 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. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 © BSI 12-19991 1 Scope This International Standard defines the geometry of the interface of removable 24° cone couplings for fluid systems in aircraft. The connection with the pipe of each one of the connecting elements may be of different design. This International Standard specifies the dimensions which allow the interchangeability of the male and female elements and of the nut used for the connection. The dimensions define the maximum volume of the male fitting. 2 Normative reference 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 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 5855-3:1988, Aerospace MJ threads Part 3: Limit dimensions for fittings for fluid systems. 3 Coupling assembly and sealing principle The coupling comprises three elements as follows. a) A female element including a frustum with a cone angle equal to 24°, with which the male element comes into contact to provide sealing. The contact line is a circle with a theoretical diameter, E. b) A male element, included inside a shell composed of two frustums connected by a spherical section with which the female element comes into contact to provide sealing. The contact line is a circle with a theoretical diameter, E. c) A nut allowing assembly of the male and female elements of the coupling. 4 Dimensions The dimensions shall be as shown in Figure 1 and given in Table 1. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 2 © BSI 12-1999 Key Point a:origin at E/2 from the XX½ axis Point b:point located at a distance R from point a, on the perpendicular to the line tilted 12° relative to XX½ and passing through point a Point c:located at B/2 from the XX½ axis and at a distance P from point a Line cd:tangent drawn from c to the arc of the circle with centre at b and radius R Line ef:tangent tilted 12° 50½ relative to the XX½ axis on the arc to the circle with centre at b and radius R. The point of tangency thus obtained is designated e. NOTEThe profile involves exclusively those machined male elements which do not lose their shape. Nevertheless, the male element may be in the form of a sleeve fitted over the end of the pipe and which, during coupling to the female element, is compressed onto the pipe and changes its shape such that the correct profile is obtained. Figure 1 Dimensions Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 © BSI 12-19993 Table 1 Dimensions Dimensions in millimetres DNa Nb ABEFGHLMPRSTUV externalinternal 4g6g4H5Hmin.max.max. theoreticalc max.min.max.recommended max.d min.min. max.e min.max.min.minmax. 5MJ10 × 11,381,627,16,55,065,265,36123,887,18 2,586,130,560,923,882,84,7 6MJ12 × 1,251,381,628,17,56,066,266,36144,388,18 2,586,130,560,924,383,84,7 8MJ14 × 1,51,381,6210,19,58,068,268,36174,389,18 2,586,130,560,924,383,85,2 10MJ16 × 1,51,381,6212,111,510,0610,2610,36194,3810,18 2,586,130,560,924,384,15,9 12MJ18 × 1,52,282,5214,513,512,0612,2612,36224,489,28 3,4812,130,961,324,484,16,4 14MJ20 × 1,52,282,5216,515,514,0614,2614,36244,489,28 3,4812,130,961,324,484,16,4 16MJ22 × 1,52,282,5218,517,516,0616,2616,36274,489,28 3,4812,130,961,324,484,46,1 20MJ27 × 1,52,282,5222,521,520,0820,2820,38324,489,28 3,4812,130,961,324,483,96,1 25MJ33 × 1,52,282,5227,626,625,0825,2825,38414,4810,28 3,4813,610,961,324,484,25,8 32MJ42 × 22,282.5234,733,732,132,332,4464,9811,28 3,4817,240,961,324,984,15,9 40MJ50 × 22,282,5242,741,740,140,340,4604,9811,28 3,4821,320,961,324,984,47,6 a Nominal size (outside diameter of the corresponding tube). b Threads are in accordance with ISO 5855-3. c Tolerance for the proof gauge: ± 0,002 5 d L min. = S e The radius R shall have a sufficient minimum value in order to prevent a deterioration of the seats during assembly of the male and female elements. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 4 © BSI 12-1999 Annex A (informative) Bibliography 1 ISO 5855-1:1988, Aerospace MJ threads Part 1: General requirements. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 © BSI 12-1999 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2M 59:1993 ISO 7319:1992 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British 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 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 cover. 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 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 information 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: 020 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 subsists 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 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 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 14:15:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI