1、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/.3BS 2M 59:1993 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee,
2、waspublished under the authorityof the Standards Boardand comes into effect on 15August1993 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 C
3、ommittees 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 Engi
4、neers Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBS2M59:1993 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative reference 1 3 Coupling assembly and sealing principl
5、e 1 4 Dimensions 1 Annex A (informative) Bibliography 4 Figure 1 Dimensions 2 Table 1 Dimensions 3 List of references Inside back coverBS 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 identic
6、al with ISO7319:1992 Aerospace Fluid systems Interface of 24 cone metric couplings, published by the International Organization for Standardization (ISO). This British Standard supersedes BSM59:1986 which is withdrawn. Cross-reference The Technical Committee has reviewed the provisions of ISO5855-3:
7、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 applicat
8、ion. 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, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and m
9、ay have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS2M59:1993 BSI 12-1999 1 1 Scope This International Standard defines the geometry of the interface of removable24 cone couplings for fluid systems in aircraft. The connection with the pipe o
10、f 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
11、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
12、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 Part3: Limit dimensions for fittings for fluid syste
13、ms. 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 to24 , with which the male element comes into contact to provide sealing. The contact line is a circle with a theoretical diameter, E. b) A
14、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
15、. 4 Dimensions The dimensions shall be as shown inFigure 1 and given inTable 1.BS 2M 59:1993 2 BSI 12-1999 Key Point a: origin at E/2 from the XX axis Point b: point located at a distance R from point a, on the perpendicular to the line tilted 12 relative to XX and passing through point a Point c: l
16、ocated at B/2 from the XX 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 50 relative to the XX axis on the arc to the circle with centre at b and radius R. The point of tangency thus obtained is de
17、signated 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 sha
18、pe such that the correct profile is obtained. Figure 1 DimensionsBS 2M 59:1993 BSI 12-1999 3 Table 1 Dimensions Dimensions in millimetres DN a N b A B E F G H L M P R S T U V external internal 4g6g 4H5H min. max. max. theoretical c max. min. max. recommended max. d min. min. max. e min. max. min. mi
19、n max. 5 MJ10 1 1,38 1,62 7,1 6,5 5,06 5,26 5,36 12 3,88 7,18 2,58 6,13 0,56 0,92 3,88 2,8 4,7 6 MJ12 1,25 1,38 1,62 8,1 7,5 6,06 6,26 6,36 14 4,38 8,18 2,58 6,13 0,56 0,92 4,38 3,8 4,7 8 MJ14 1,5 1,38 1,62 10,1 9,5 8,06 8,26 8,36 17 4,38 9,18 2,58 6,13 0,56 0,92 4,38 3,8 5,2 10 MJ16 1,5 1,38 1,62 1
20、2,1 11,5 10,06 10,26 10,36 19 4,38 10,18 2,58 6,13 0,56 0,92 4,38 4,1 5,9 12 MJ18 1,5 2,28 2,52 14,5 13,5 12,06 12,26 12,36 22 4,48 9,28 3,48 12,13 0,96 1,32 4,48 4,1 6,4 14 MJ20 1,5 2,28 2,52 16,5 15,5 14,06 14,26 14,36 24 4,48 9,28 3,48 12,13 0,96 1,32 4,48 4,1 6,4 16 MJ22 1,5 2,28 2,52 18,5 17,5
21、16,06 16,26 16,36 27 4,48 9,28 3,48 12,13 0,96 1,32 4,48 4,4 6,1 20 MJ27 1,5 2,28 2,52 22,5 21,5 20,08 20,28 20,38 32 4,48 9,28 3,48 12,13 0,96 1,32 4,48 3,9 6,1 25 MJ33 1,5 2,28 2,52 27,6 26,6 25,08 25,28 25,38 41 4,48 10,28 3,48 13,61 0,96 1,32 4,48 4,2 5,8 32 MJ42 2 2,28 2.52 34,7 33,7 32,1 32,3
22、32,4 46 4,98 11,28 3,48 17,24 0,96 1,32 4,98 4,1 5,9 40 MJ50 2 2,28 2,52 42,7 41,7 40,1 40,3 40,4 60 4,98 11,28 3,48 21,32 0,96 1,32 4,98 4,4 7,6 a Nominal size (outside diameter of the corresponding tube). b Threads are in accordance with ISO5855-3. c Tolerance for the proof gauge: 0,0025 d L min.
23、= 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.BS 2M 59:1993 4 BSI 12-1999 Annex A (informative) Bibliography 1 ISO 5855-1:1988, Aerospace MJ threads Part 1: General requirements.BS2M59:1993 BS
24、I 12-1999 List of references See national foreword.BS 2M 59:1993 ISO 7319:1992 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 internatio
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