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1、BRITISH STANDARD BS ISO 2974:2005 Diesel engines High-pressure fuel injection pipe end-connections with 60? ? female cone ICS 43.060.40 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2974:2005 This British Standard was published un
2、der the authority of the Standards Policy and Strategy Committee on 10 June 2005 BSI 10 June 2005 ISBN 0 580 45932 2 National foreword This British Standard reproduces verbatim ISO 2974:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Techn
3、ical Committee MCE/22, Engines for road vehicles, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be
4、found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are r
5、esponsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and ke
6、ep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iii, a blank page, pages 1 to 5 and a back cover. The BSI copyright notice d
7、isplayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 2974:2005(E) INTERNATIONAL STANDARD ISO 297
8、4 Sixth edition 2005-03-01 Diesel engines High-pressure fuel injection pipe end-connections with 60 female cone Moteurs diesels Raccords finaux cne femelle de 60 pour lignes dinjection de combustible haute pression BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+
9、00:00 2006, Uncontrolled Copy, (c) BSI ii BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memb
10、er 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, government
11、al and 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Direct
12、ives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodie
13、s casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2974 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee
14、 SC 7, Injection equipment and filters for use on road vehicles. This sixth edition cancels and replaces the fifth edition (ISO 2974:2000), Table 1 of which has been technically revised (addition of tube outside diameter of 7 mm). BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
15、26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Diesel engines High-pressure fuel injection pipe end-connections with 60 female cone 1 Scope This International S
16、tandard specifies the dimensional requirements of high-pressure pipe end-connections for diesel (compression-ignition) engine fuel injection equipment. It is applicable to externally threaded end-connections of types 1 and 2 having a 60 female cone (see Figures 1 to 3), as well as to the pipe end as
17、semblies of high-pressure fuel injection pipes with outside diameters of up to and including 12 mm (see Table 1). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refere
18、nces, the latest edition of the referenced document (including any amendments) applies. ISO 261:1998, ISO general purpose metric screw threads General plan ISO 3508:1976, Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262 3 Requirements 3.1 Dimensions and tolerances Fig
19、ures 1 and 2 indicate the basic requirements for the end-connection at the fuel injector and fuel injection pump to allow interchangeability for high-pressure fuel injection pipe assemblies. The 60 female cone and its relationship to the external thread of the end-connection shall meet the requireme
20、nts of Figure 1. However, variations at the smaller end of the female cone as shown in Figure 3 are acceptable. Dimensions and tolerances are given in Table 1. Unspecified details are left to the manufacturers choice. With reference dimension T in Figures 1 and 2, the external thread may be of eithe
21、r type 1 or type 2. However, it shall be possible to screw the GO-gauge for the thread up to the plane specified by dimension T for both types. Figure 4 identifies the pipe end assembly dimensions that are important to sealing - those normally on the leading edge of the sealing face of the connectio
22、n end (see also 3.2). 3.2 Materials The specification of material and heat treatment shall be made according to the intended use. BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 To ensure that deformation takes place at th
23、e sealing face of the connection end, the connection end of the high-pressure injection pipe shall be softer than the female cone of the end-connection of the fuel injection pump or the fuel injector. 4 Designation An end-connection conforming to this International Standard shall be designated by th
24、e following elements, in the order given: a) reference to this International Standard; b) the shape, in accordance with Figure 3; c) the tube outside diameter, in millimetres; d) the thread designation, in accordance with ISO 261. EXAMPLE An end-connection of shape A, of pipe outside diameter 10 mm,
25、 with an M22 ? 1,5 thread is designated: ISO 2974 A 10 ? ? ? ? M22 ? ? ? ? 1,5 Dimensions in millimetres, surface roughness values in micrometres Key 1 chamfer to root of thread 2female sealing face NOTE See Table 1 for dimensions A, E, S and T. a SeeFigure 3. Figure 1 End-connection, type 1 BS ISO
26、2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 NOTE 1 All dimensions and specifications other than the undercut a are the same as for type 1. NOTE 2 See Table 1 for dimension T. a Undercut in accordance with ISO 3508. Figure 2 E
27、nd-connection, type 2 Dimensions in millimetres a) Shape A b) Shape B c) Shape C Key 1 reference diameter plane NOTE See Table 1 for dimensions S, F1and F3. Figure 3 Shapes of detail X (Figure 1) on female cones, types 1 and 2 BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 1
28、4:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Dimensions in millimetres Key 1 connection end sealing face 2 chamfer to root of threads NOTE See Table 1 for dimensions A, G, L, P and S. a The connection end bore entrance configuration shall be so chosen that, after final assembly, the pipe ins
29、ide diameter is not reduced. b 58 ? 1 included angle (other shapes by agreement). c Design of the shoulder of connection end and the connector nut shall be agreed between customer and manufacturer. Figure 4 Pipe end assembly Table 1 Dimensions in millimetres Thread a Reference diameter F1bF3b EPGLTT
30、ube outside diameter AS?0,1max. 0,3 0 ? ?0,5 0,5 0 ? max.min. 4,5 M10 ? 1,25 M12 ? 1,5 5 1,12 to 2,24 0,8 7 0,5 7 10 6 M12 ? 1,5 M14 ? 1,5 6,5 1,5 to 3 6,1 0,8 9 0,8 8 11 7 M14 ? 1,5 6,5 cor 7,5 1,5 to 3 6,1 0,8 9c or 10,50,8 8 11 8 M16 ? 1,5 M18 ? 1,5 M22 ? 1,5 8,5 2 to 4 7,3 2,6 11,5 0,9 11 16,5 1
31、0 M20 ? 1,5 M22 ? 1,5 M24 ? 1,5 10,5 2,5 to 5 9,3 2,6 13,5 0,9 12,5 18 12 M22 ? 1,5 M26 ? 1,5 12,5 3 to 5 10,3 2,6 15,5 1,8 15,5 21 a Tolerance classes of threads: 6g for external threaded end-connection; 6H for connector nuts. b Dimension F1 shall be adapted to the inside diameter of the pipe for t
32、he sake of optimum flow conditions. If required, for instance for edge filters, application of dimension F3 is allowed. c In case outer diameter P of 9 is used with reference diameter S of 6,5 mm, then a connector collar shall be applied for strengthening. BS ISO 2974:2005 Licensed Copy: sheffieldun
33、 sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 Bibliography 1 ISO 7876-4, Fuel injection equipment Vocabulary Part 4: High-pressure pipes and end-connections BS ISO 2974:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:14 GMT+00:00 2006, Uncontrol
34、led Copy, (c) BSI BS ISO 2974:2005 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 C
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