1、BRITISH STANDARD AEROSPACE SERIES Pipe coupling 8“ 30 in titanium alloy - Elbows go“, bulkhead The European Standard EN 4021:2001 has the status of a British Standard ICs 49.026.30; 49.036 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 4021:2001 BS EN 4021:2001 Amd. No.
2、 Date National foreword Comments This British Standard is the official English language version of EN 4021:2001. The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace Hydraulic Systems, Fluids and Components which has the responsibility to: - - aid enquirers
3、to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this
4、 committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or
5、 by using the “Find facility of the BSI Standards Electronic Catalogue. 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 im
6、munity from legal obligations. This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 November 2001 O BSI 13 November 2001 Summary of pages This do
7、cument comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. ISBN O 580 37171 9 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4021 O
8、ctober 2001 ICs 49.080 English version Aerospace series - Pipe coupling 830 in titanium alloy - Elbows go, bulkhead Srie arospatiale - Systme de raccordement 8“30 en alliage de titane - Raccords couds a 90“ pour traverse de cloison Luft- und Raumfahrt - Rohrverschraubung V30 aus Titanlegierung - Win
9、kel-Schottverschraubungen 90“ This European Standard was approved by CEN on 29 December 2000. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-dat
10、e lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre 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 re
11、sponsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Ne
12、therlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMITE EUROPEEN DE NORMALISATION Management Centre: rue de Stassart, 36 8-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any mean
13、s reserved worldwide for CEN national Members. Ref. No. EN 4021:2001 E EN 4021:2001 (E) 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 Stand
14、ard has received the approval of the National Associations 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 lates
15、t by April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denma
16、rk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 2 EN 4021:2001 (E) 1 Scope This standard specifies the Characteristics of elbows go“, bulkhead, for pipe couplings 8“30, in titanium alloy, for
17、 aerospace applications. Nominal pressure: up to 28 O00 kPa Temperature range: - 55 “C to 135 “C 2 Normative references 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
18、 the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications 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 (i
19、ncluding amendments). IS0 5855-3, Aerospace - MJ threads - Part 3: Limit dimensions for fittings for fluid systems. EN 2424, Aerospace series - Marking of aerospace products. EN 2491, Aerospace series - Molybdenum disulphide dry lubricants - Coating methods. EN 3267, Aerospace series - Washers, bulk
20、head, in titanium alloy. EN 3274, Aerospace series - Pipe coupling 830 - Thread ends - Geometric configuration. EN 3275, Aerospace series - Pipe coupling 830 up to 28 O00 kPa - Dynamic beam seal - Metric series - Technical specification. EN 331 1, Aerospace series - Titanium alloy TI-P64001 - Anneal
21、ed - Bar for machining - D I 150 mm.) EN 3312, Aerospace series - Titanium alloy TI-P64001 - Grade 2 - Annealed - Forgings - De I 150 mm.) EN 3314, Aerospace series - Titanium alloy TI-P64001 - Solution treated and aged - Bar for machining - D I 75 mrn.) EN 331 5, Aerospace series - Titanium alloy T
22、I-P64001 - Solution treated and aged - Forgings - D, I 75 mm.) 3 Required characteristics 3.1 Configuration - Dimensions - Mass According to figure 1 and table 1. The values apply before lubricating. Dimensions not specified are at the manufacturers option provided that the qualification and accepta
23、nce require- ments of EN 3275, type I1 are met. ) Published as AECMA Prestandard at the date of publication of this standard 3 EN 4021:2001 (E) 3.2 Surface roughness According to figure 1, unless otherwise specified in the design documentation. 3.3 Materials According to EN 331 1 or EN 3314, EN 3312
24、 or EN 3315. 3.4 Surface treatment Lubrication: according to EN 2491, on threads and sealing faces. Prior to application of the lubricant, the surface shall be abrasive blasted using non-metallic grit. Film thickness 0,005 mm to 0,013 mm. 3.5 Internal surface finishing Finishing shall give a radius
25、R of 0,3 mm to 1,0 mm and a surface roughness of 0,8 pm. Hand deburring is not permitted. Dimensions in millimetres -0.3 X a Area for marking According to EN 3274, form C According to EN 3274, form D Thread e Across flats s R 0,3 to 1,0 Figure 1 4 EN 4021:2001 (E) According to IS0 5855-3. Drill dept
26、h dimension. Across flats 4 Designation EXAMPLE . . . . Description block Identity block I EN402 1-05 ELBOW go, BULKHEAD I Number of this standard Code (see table 1) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking According to EN 2424
27、, style A and figure 1. 6 Technical specification According to EN 3275, type II. 5 EN 4021:2001 (E) 7 Installation details See figure 2. Dimensions in millimetres 2 Key 1 Bulkhead 2 Washer according to EN 3267 a Grip length Thread Thread + 0.5 U I Figure 2 6 BS EN 4021:2001 BSI 389 Chiswick High Roa
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