BS EN 2912-1996 Washers flat large diameter in aluminium alloy anodized or chromated《经阳极化或铬酸钝化处理的铝合金大直径扁平垫圈》.pdf

1、BRITISH STANDARD AEROSPACE SERIES BS EN 2912:1996 Washers, flat, large diameter in aluminium alloy, anodized or chromated The European Standard EN2912:1996 has the status of a BritishStandard ICS 49.040.20BSEN2912:1996 This BritishStandard, having been prepared under the directionof the Engineering

2、SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15June1996 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment88/76306DC ISBN 0 580 25931 5 Committees responsible for this BritishStand

3、ard The preparation of this BritishStandard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represented: Association of Electronic, Telecommunications and Business Equipment Industries British Industrial Fasteners Federatio

4、n Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSEN2912:1996 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics 3 4

5、 Designation 5 5 Marking 5 6 Quality assurance 5 Figure 1 4 Table 1 3 Table 2 4 List of references Inside back coverBSEN2912:1996 ii BSI 01-2000 National foreword This BritishStandard has been prepared by Technical Committee ACE/12 and is the English language version of EN2912:1996 Aerospace series

6、Washers, flat, large diameter, in aluminium alloy, anodized or chromated, published by the European Committee for Standardization (CEN). EN2912:1996 was produced as a result of international discussions in which the UnitedKingdom took an active part. A British Standard does not purport to include al

7、l 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 BritishStandard EN2000:1991 BS EN20

8、00:1992 Quality assurance. EN aerospace products. Approval of the quality system of manufacturers EN2101:1991 BS EN2101:1991 Specification for chromic acid anodizing of aluminium and wrought aluminium alloys EN2248:1991 BS EN2284:1991 Specification for sulphuric acid anodizing of aluminium and wroug

9、ht aluminium alloys EN2424:1995 BS EN2424:1995 Marking of aerospace products Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may h

10、ave had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2912 March 1996 ICS 49.040.20 Descriptors: Aircraft industry, washer, plain washer, aluminium alloy, chromate, surface treatment, dimension, d

11、esignation English version Aerospace series Washers, flat, large diameter, inaluminium alloy, anodized or chromated Srie arospatiale Rondelles plates larges, en alliage daluminium, anodises ou chromates Luft- und Raumfahrt Scheiben, flach, groer Auendurchmesser, aus Aluminiumlegierung, anodisiert od

12、er chromatiert This European Standard was approved by CEN on1995-08-31. 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 alteration. Up-to-date lists and bibliograp

13、hical 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 translation under the responsibility of a CE

14、N 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, Luxembourg, Netherlands, Norway, Portugal, Spain

15、, Sweden, Switzerland and UnitedKingdom. 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. EN2912:1996 EEN2912:1996 BSI 01-2000 2 Foreword T

16、his 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 Associations and the Official Services

17、of the members 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 September1996, and conflicting national standards shall be withdrawn at the lat

18、est by September1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa

19、y, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN2912:1996 BSI 01-2000 3 1 Scope This standard specifies the characteristics of flat washers, large diameter, in aluminium alloy, anodized or chromated, for maximum operating temperature120 C, for aerospace applications. 2 Normative referenc

20、es This European Standard incorporates 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 p

21、ublications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers. EN 2

22、090, Aerospace series Aluminium alloy2024-T3 Clad sheet and strip 0,4k ak 6mm 1) . EN 2091, Aerospace series Aluminium alloy2024-T4 Clad sheet and strip 0,4k ak 6mm 1) . EN 2101, Aerospace series Chromic acid anodizing of aluminium and wrought aluminium alloys. EN 2284, Aerospace series Sulphuric ac

23、id anodizing of aluminium and wrought aluminium alloys. EN 2319, Aerospace series Aluminium alloy2024-T3510 Drawn barak 75mm 1) . EN 2320, Aerospace series Aluminium alloy2024-T4 Drawn bar ak 75mm 1) . EN 2424, Aerospace series Marking of aerospace products. EN 2437, Aerospace series Chromate conver

24、sion coatings (yellow) for aluminium and aluminium alloys 2) . 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 2. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. 3.2 Materials EN2090, EN2091, EN2319 or EN2320 3.3 Surface

25、 treatment See Table 1. Table 1 1) Published as AECMA Standard at the date of publication of this standard 2) In preparation at the date of publication of this standard Nature Code EN2284B A EN2437A1 B EN2101B a None a Specified in the AECMA Prestandard. Shall be replaced by EN2284B.EN2912:1996 4 BS

26、I 01-2000 Table 2 Figure 1 Diameter code D 1 D 2 D 3 S Mass b H13 h14 nom. Tol. Thickness code 10% a 030 3,2 9 3,8 06 0,6 0,09 10 1 0,16 040 4,2 12 4,8 06 0,6 0,17 10 1 0,28 050 5,2 15 6 10 1 0,44 16 1,6 0,70 060 6,2 18 7,4 12 1,2 0,76 16 1,6 1,01 070 7,2 21 8,4 12 1,2 1,00 16 1,6 1,33 080 8,2 24 9,

27、4 16 1,6 1,80 25 2,5 2,80 100 10,2 30 11,6 20 2 3,49 25 2,5 4,37 120 12,2 36 13,8 20 2 5,05 25 2,5 6,30 a Includes also the flatness tolerance. b Approximate values(kg/1000 pieces), calculated on the basis of2,85kg/dm 3 , given for information purposes only +0,1 0 +0,2 0 +0,3 0EN2912:1996 BSI 01-200

28、0 5 4 Designation EXAMPLE: NOTEIf necessary, the codeI9005 shall be placed between the description block and the identity block. 5 Marking EN2424, style G 6 Quality assurance EN20006 blankBSEN2912:1996 BSI 01-2000 List of references See national foreword.BS EN 2912:1996 BSI 389 Chiswick High Road Lo

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