1、BRITISH STANDARD AEROSPACE SERIES BS EN 3380:1996 Rings, retaining Technical specification The European Standard EN3380:1996 has the status of a BritishStandard ICS49.040.20BSEN3380:1996 This BritishStandard, having been prepared under the directionof the Engineering SectorBoard, was published under
2、the authority of the Standards Board and comes intoeffect on 15June1996 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/14 Draft for comment 88/75425 DC ISBN 0 580 25641 3 Committees responsible for this BritishStandard The preparation of this Bri
3、tishStandard was entrusted to Technical Committee ACE/14, Aerospace details and parts, upon which the following bodies were represented: British Iron and Steel Producers Association Civil Aviation Authority (Airworthiness Division) Federation of Wire Rope Manufacturers of Great Britain Institute of
4、Petroleum Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSEN3380:1996 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Qual
5、ity assurance 3 5 Requirements and test methods 3 6 Filing of documents 9 7 Certificate of conformity 9 Figure 1 8 Figure 2 9 Table 1 4 List of references Inside back coverBSEN3380:1996 ii BSI 12-1999 National foreword This BritishStandard has been prepared by Technical Committee ACE/14 and is the E
6、nglish language version of EN3380:1996 Aerospace series Rings, retaining Technical specification, published by the European Committee for Standardization (CEN). EN3380:1996 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does
7、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. Cross-references Publication referred to Corresponding BritishSta
8、ndard ISO2859-1:1989 BS6001 Sampling procedures for inspection by attributes Part1:1991 Specification for sampling plans indexed by acceptance quality level (AQL) for lot-by-lot inspection BS ISO3534 Statistics, Vocabulary and symbols ISO3534-1:1993 BS ISO3534-1:1993 Probability and general statisti
9、cal terms ISO3534-2:1993 BS ISO3534-2:1993 Statistical quality control ISO3534-3:1993 BS ISO3534-3:1993 Glossary of terms relating to the design of experiments EN3042:1991 BS EN3042:1992 Quality assurance. EN aerospace products. Qualification procedure Summary of pages This document comprises a fron
10、t cover, an inside front cover, pagesi andii, theEN title page, pages2 to10, 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.EUROPEAN STANDARD
11、NORME EUROPENNE EUROPISCHE NORM EN3380 January1996 ICS49.040.20 Descriptors: Aircraft industry, snap ring, specification, test, acceptance testing, characteristic English version Aerospace series Rings, retaining Technicalspecification Srie arospatiale Anneaux darrt Spcification technique Luft- und
12、Raumfahrt Sicherungsringe Technische Lieferbedingungen This European Standard was approved by CEN on1995-09-14. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alt
13、eration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tran
14、slation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembou
15、rg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref.No.EN3380:199
16、6EEN3380:1996 BSI 12-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National A
17、ssociations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July1996, and conflicting national standar
18、ds shall be withdrawn at the latest by July1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
19、Spain, Sweden, Switzerland, United Kingdom.EN3380:1996 BSI 12-1999 3 1 Scope This standard specifies the requirements and test methods for axial and radial mounting retaining rings for aerospace applications. It is applicable whenever referenced. 2 Normative references This European Standard incorpo
20、rates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Europea
21、n Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO2859-1, Sampling procedures for inspection by attributes Part1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. I
22、SO3534, Statistics Vocabulary and symbols. ISO6507-1, Metallic materials Hardness test Vickers test Part1: HV5 to HV100. EN3042, Aerospace series Quality assurance EN aerospace products Qualification procedures. EN3425, Aerospace series Groove dimensions for axial mounting, internal type, retaining
23、rings 1) . EN3426, Aerospace series Groove dimensions for axial mounting, external type, retaining rings 1) . EN3427, Aerospace series Groove dimensions for radial mounting retaining rings 1) . 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 inspection batch a q
24、uantity of rings of the same type, same dimensions, same material, same surface treatment, manufactured under identical conditions, and presented for inspection at the same time 3.2 simple random sampling see ISO3534 3.3 sampling plan see ISO3534 3.4 acceptable quality level (AQL) see ISO3534 4 Qual
25、ity assurance EN3042 No defect permitted 5 Requirements and test methods See Table 1. Inspection and testing shall be carried out on each inspection batch, by the manufacturer or under his responsibility. Each ring may be submitted to several inspections or tests. Inspection batches declared unaccep
26、table after inspection and testing shall be submitted for re-inspection only after all defective parts have been removed and/or defects corrected. In this case, twice the initial sample size shall be used for re-inspection or re-testing of the attributes which caused initial rejection; the same insp
27、ection level shall be used. If the reason for rejection results from the test procedure or test apparatus, the tests may be repeated after elimination of the cause. A note to this effect shall be added to the corresponding inspection documents. Unless otherwise specified, the test temperature shall
28、be20 C. 1) Published as AECMA Prestandard at the date of publication of this standardEN 3380:1996 4 BSI 12-1999 Table 1 Subclause Characteristics Requirement Test method Qualification Batch size Rception Inspection level a Sampling plan ab AQL a 5.1 Material In accordance with the product standard 5
29、.2 Dimensions (Freering) In accordance with the product standard Thickness, diameter D 1for axial mounting rings, dimensions D 2for radial mounting rings: Other dimensions Standard gauging 8 8 II II Simple random, for standard inspection Simple random, for standard inspection 1% 2,5% 5.3 Manufacturi
30、ng 5.3.1 Surface treatment In accordance with the product standard See surface treatment standard. 8 II Simple random, for standard inspection 2,5% 5.3.2 Surface appearance No burrs, scales, cracks, scratches, laps, pittings, sharp edges, tooling marks, porosity, or other defects prejudicial to thei
31、r use Visual examination (magnification10times to30times) 8 II Simple random, for standard inspection 0,4%EN 3380:1996 BSI 12-1999 5Table 1 Subclause Characteristics Requirement Test method Qualification Batch size Rception Inspection level a Sampling plan ab AQL a 5.4 Mechanical properties 5.4.1 El
32、asticity Axial mounting retaining rings Being placed in the test device, the ring shall not fall by its own mass (see Figure 1 and Figure 2). a) Tooling and test device Internal type See Figure 1. External type See Figure 2. It is forbidden to use pliers. b) Method Internal type Place the ring in th
33、e cone and push it to put it in diameters B and C. External type Place the ring on the cone and push it to put it on diameters D and E. 4 S3 Simple random, for standard inspection 1% Radial mounting retaining rings No cracks shall be apparent after assembling and disassembling ten times. Effort of e
34、xtraction15N Install the ring in a groove of maximum diameter (seeEN3427) and then removeit. Install the ring in a groove of minimum diameter (seeEN3427). 4 S3 Simple random, for standard inspection 1%EN 3380:1996 6 BSI 12-1999Table 1 Subclause Characteristics Requirement Test method Qualification B
35、atch size Rception Inspection level a Sampling plan ab AQL a 5.4.2 Hardness In accordance with the product standard After removing any surface protection, measure in accordance with ISO6507-1: 4 S3 Simple random, for standard inspection 1% 5.5 Marking In accordance with the product standard Visual e
36、xamination 8 II Simple random, for standard inspection 4% 5.6 Delivery 5.6.1 Packaging It shall: only contain rings of the same identity block; avoid any damage during handling and transportation. Visual examination 100% EN 3380:1996 BSI 12-1999 7Table 1 Subclause Characteristics Requirement Test me
37、thod Qualification Batch size Rception Inspection level a Sampling plan ab AQL a 5.6.2 Labelling Durable labels, on the package, containing the following informations: identity block; description block; quantity; manufacturers identification (name and address); inspection batch number; inspection st
38、amp. Visual examination 100% a In accordance with ISO2859-1 b Other sampling plans of ISO2859-1 may be used, provided that they ensure an equivalent quality level.EN3380:1996 8 BSI 12-1999 Figure 1 EN3380:1996 BSI 12-1999 9 6 Filing of documents For each inspection batch, the manufacturer shall stor
39、e in an archive, for at least three years, a report of tests carried out, available for despatch, to a user, at his request. 7 Certificate of conformity Each delivery shall be accompanied by a certificate of conformity confirming that the rings conform with the requirements of this standard. Figure
40、2 10 blankBSEN3380:1996 BSI 12-1999 List of references See national foreword.BS EN 3380:1996 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
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