BS EN 2955-1993 Aerospace series - Recycling of titanium and titanium alloy scrap《航空航天系列 钛和钛合金废料的回收利用》.pdf
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1、BRITISH STANDARD BS EN 2955:1993 Aerospace series Recycling of titanium and titanium alloy scrap ICS 49.025.30 Incorporating corrigendum January 1995National foreword This British Standard is the UK implementation of EN 2955:1993, The UK participation in its preparation was entrusted to Technical Co
2、mmittee ACE/61/-/49, Titanium and its alloys. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with
3、 a British Standard cannot confer immunity from legal obligations. BS EN 2955:1993 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 BSI 2009
4、 Amendments/corrigenda issued since publication Date Comments 30 November 2009 Implementation of CEN corrigendum January 1995 modification of first dashed item in 4.4.2 ISBN 978 0 580 61002 8 incorporating corrigendum January 1995. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2955 July 1993
5、UDC 669.295.002.68:620.1:629.7 Descriptors: Aircraft industry, titanium, titanium alloys, metal scrap, burrs, waste recycling English version Aerospace series Recycling of titanium and titanium alloy scrap Srie arospatiale Recyclage des chutes de titane et dalliages de titane Luft- und Raumfahrt Wie
6、deraufbereitung von Schrott aus Titan und Titanlegierungen This European Standard was approved by CEN on 1993-07-26. 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 an
7、y alteration. 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
8、 translation 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, Lux
9、embourg, 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 1993 Copyright reserved to CEN members Ref. No. EN
10、2955:1993 E Incorporating corrigendum January 1995 BSI 2009 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 recei
11、ved the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national standard, either by pub
12、lication of an identical text or by endorsement at the latest by January 1994, and conflicting national standards shall be withdrawn at the latest by January 1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgi
13、um, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Recycling 3 Annex A (normative) Flow chart for scrap recycling
14、8 Table 1 Classification of titanium and titanium alloy scrap 5 BS EN 2955:19933 1 Scope This standard specifies the general requirements for recycling, by vacuum remelting, titanium and titanium alloy scrap used for the production of ingots. 2 Normative references This European Standard incorporate
15、s by dated or undated reference, provisions from other publications. These normative references are cited in 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 European S
16、tandard 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. 3 Definitions 3.1 scrap processor the sc
17、rap processor classifies the scrap and guarantees conformity to the melters requirements. Scrap processing may be carried out by an independant processor (scrap dealer), by the melters processing department or by the purchasers processing department 3.2 melter a company which manufactures titanium o
18、r titanium alloy ingots 3.3 purchaser body which purchases the products from a manufacturer or a stockist in accordance with the requirements of the user NOTE the purchaser may also be the user. 3.4 user see EN 2000 3.5 melters recovery department the department responsible for recovering the scrap
19、produced by the melter and preparing it for treatment by the scrap processor 3.6 purchasers recovery department the department responsible for recovering the scrap produced by the purchaser and preparing it for treatment by the scrap processor 3.7 scrap lot scrap from the same alloy and same classif
20、ication prepared by the same processor in accordance with the same process schedule and processed at the same time 3.8 classification of scrap the scrap categories and sub-categories are defined in the Table 1 3.9 traceable scrap individual pieces of scrap, the history of which can be traced back to
21、 the original ingot 3.10 massive scrap scrap with an individual mass ofU 0,5 kg 3.11 light scrap scrap with an individual mass of 0,5 kg 3.12 non-contaminated scrap scrap which is free from contamination caused by: welding; brazing; electrolytic deposits; painting; coating; oxidation caused by heati
22、ng; nitriding; etc. 4 Recycling For flow chart for scrap recycling see Annex A. 4.1 General requirements The scrap shall: come exclusively from aerospace quality products, but only if any defects which led to the rejection can be removed by remelting (e.g. without high density inclusions, HDI, carbi
23、des). BS EN 2955:1993 BSI 20094 be collected, segregated according to alloy type, classified in accordance with the Table 1, put into boxes and marked with an identification number according to a laid-down procedure. 4.2 Approval For each scrap category, the scrap processor shall demonstrate that hi
24、s sorting process is capable of yielding a product that meets the requirements of this standard. In order to demonstrate this capability, a verification programme shall be established in conjunction with the melter and the purchaser. After satisfactory results, the scrap processor shall be approved
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