1、BRITISH STANDARD AEROSPACE SERIES BS 2M 63:1993 ISO 7320:1992 Specification for Dimensions of aerospace fluid system port connection, seal and fitting end UDC 621.643.414:629.7BS2M 63:1993 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, was
2、 published under the authority of the Standards Board and comesinto effect on 15 August 1993 BSI 10-1999 First published February 1987 Second edition August 1993 The following BSI references relate to the work on this standard: Committee reference ACE/- Draft for comment 92/70579 DC ISBN 0 580 22502
3、 X 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
4、Engineers Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBS2M 63:1993 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative reference 1 3 Sealing principle and assembly of
5、 the coupling 1 4 Dimensions 1 Annex A (informative) Bibliography 6 Figure 1 Port connection configuration 1 Figure 2 Fitting end configuration 3 Figure 3 O-ring seal configuration 5 Table 1 Port connection dimensions 2 Table 2 Fitting end dimensions 4 Table 3 Selection of O-ring seal sizes 5 List o
6、f references Inside back coverBS2M 63:1993 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO 7320:1992 Aerospace Couplings, threaded and sealed, for fluid systems Dimensions, published by
7、 the International Organization for Standardization (ISO). This British Standard supersedes BS M 63:1987, which is withdrawn.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 accept
8、able 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 obliga
9、tions. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to6, 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 in
10、side front cover.BS2M 63:1993 BSI 10-1999 1 1 Scope This International Standard establishes a system for sealing the port connection of couplings used in the aerospace industry. It specifies dimensions to achieve interchangeability of the port connection, the fitting end and a seal. The seal may be
11、a standard O-ring or a special ring. 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 p
12、arties 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 Par
13、t3: Limit dimensions for fittings for fluid systems. 3 Sealing principle and assembly of the coupling The coupling comprises three elements: a) the port element, including the internal thread (see 4.1); b) the fitting element, including an external thread and a groove intended to receive the O-ring
14、(see 4.2) or a special seal; this element is screwed into the internal threaded element; c) the seal element, which maintains system pressure without leakage a standard O-ring (see4.3) or special seal. 4 Dimensions 4.1 Port connection See Figure 1 and Table 1. Figure 1 Port connection configurationB
15、S2M 63:1993 2 BSI 10-1999 Table 1 Port connection dimensions Dimensions in millimetres DN a Thread b B D 1 D 2 E M N U V 4H5H nom. tol. min. min. min. max. 03 MJ8 1 1,9 8,6 11,3 0,08 Internal diameter of tube 15 15 04 05 MJ10 1 10,6 13,3 18 06 MJ12 1,25 12,4 15,1 12,5 20 17 08 MJ14 1,5 3,4 14,6 18,3
16、 16 0,1 23 21 10 MJ16 1,5 16,6 20,3 25 12 MJ18 1,5 18,6 22,3 28 14 MJ20 1,5 20,6 24,3 31 16 MJ22 1,5 22,6 26,3 18 MJ24 1,5 24,6 28,3 33 20 MJ27 1,5 27,6 31,3 37 22 MJ30 1,5 30,6 34,3 42 25 MJ33 1,5 33,6 37,3 0,2 28 MJ36 1,5 36,6 40,3 47 32 MJ42 2 4,3 43 47,1 20 56 26 40 MJ50 2 51 55,1 61 a DN = Nomi
17、nal size (outside diameter of the corresponding tube). b Threads are in accordance with ISO 5855-3.04 , + 004 , + 00,1 + 0015 , + 0BS2M 63:1993 BSI 10-1999 3 4.2 Fitting end See Figure 2 and Table 2. Figure 2 Fitting end configurationBS2M 63:1993 4 BSI 10-1999 Table 2 Fitting end dimensions Dimensio
18、ns in millimetres DN a Thread b C F H J S T Y 4h6h 0,5 nom. tol. nom. tol. min. 03 MJ8 1 6,2 10 1,9 6,3 14 h13 13,8 3 04 05 MJ10 1 8,2 8,3 17 16,8 06 MJ12 1,25 9,8 11,5 10,1 19 18,7 08 MJ14 1,5 11,5 15 3,4 11,7 22 21,7 4 10 MJ16 1,5 13,5 13,7 24 23,7 5 12 MJ18 1,5 15,5 15,7 27 26,7 14 MJ20 1,5 17,5
19、17,7 30 29,7 16 MJ22 1,5 19,5 19,7 18 MJ24 1,5 21,5 21,7 32 31,6 20 MJ27 1,5 24,5 24,7 36 h14 35,4 22 MJ30 1,5 27,5 27,7 41 40,4 25 MJ33 1,5 30,5 30,7 28 MJ36 1,5 33,5 33,7 46 45,4 6 32 MJ42 2 38,9 19 4,3 39 50 49,4 40 MJ50 2 46,9 47 60 59,3 a DN = Nominal size (outside diameter of the corresponding
20、 tube). b Threads are in accordance with ISO 5855-3. 0 02 , 04 , + 005 , + 0 0 008 , 0 01 , 0 015 , BS2M 63:1993 BSI 10-1999 5 4.3 O-ring seal See Figure 3 and Table 3. Table 3 Selection of O-ring seal sizes Figure 3 O-ring seal configuration Dimensions in millimetres DN a d 1 d 2 nom. tol. nom. tol
21、. 03 6 0,13 1,8 0,08 04 05 8 0,14 06 9,5 0,15 08 11,2 0,16 2,65 0,09 10 13,2 0,17 12 15 0,18 14 17 0,2 16 19 0,21 18 21,2 0,22 20 23,6 0,24 22 26,5 0,25 25 30 0,27 28 32,5 0,29 32 37,5 0,32 3,55 0,1 40 45 0,36 NOTESelection taken from Series A of ISO 3601-1. a DN = Nominal size (outside diameter of
22、the corresponding tube).BS2M 63:1993 6 BSI 10-1999 Annex A (informative) Bibliography 1 ISO 1101:1983, Technical drawings Geometrical tolerancing Tolerances of form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings. 2 ISO 2692:1988, Technical drawings Geo
23、metrical tolerancing Maximum material principle. 3 ISO 3601-1:1988, Fluid systems Sealing devices O-rings Part 1: Inside diameters, cross-sections, tolerances and size identification code.BS2M 63:1993 BSI 10-1999 List of references See national foreword.BS 2M 63:1993 ISO 7320:1992 BSI 389 Chiswick H
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