1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3863:2013Aerospace series Non-metallic materials Glasstransparencies Test methods Determination of flatnessBS EN 3863:2013 BRITISH STANDARDNational forewordThis British Sta
2、ndard is the UK implementation of EN 3863:2013.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not
3、purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 80245 4ICS 49.025.99Compliance with a British Standard cannot confer immunity fromlegal obligat
4、ions.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2013.Amendments issued since publicationDate Text affectedBS EN 3863:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3863 January 2013 ICS 49.025.99 English Version Aeros
5、pace series - Non-metallic materials - Glass transparencies - Test methods - Determination of flatness Srie arospatiale - Matriaux non-mtalliques - Transparents en verre - Mthodes dessais - Dtermination de la planit Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Transparente Glaswerkstoffe - Pr
6、fverfahren - Bestimmung der Ebenheit This European Standard was approved by CEN on 17 November 2012. 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
7、-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 trans
8、lation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finlan
9、d, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
10、 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3863:2013: EBS EN 3863:2013EN 3863:2013 (E) 2 Contents Page Fo
11、reword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms, definitions, symbols and abbreviations .5 4 Health, safety and environment .5 5 Principle/technique 5 6 Resources .6 6.1 Apparatus/facilities 6 6.2 Materials/reagents .6 6.3 Qualification of personnel 6 7 Test samples/test pieces 6
12、 8 Test procedure .6 9 Expression of results 7 10 Measurement uncertainties 7 11 Designation 7 12 Test report 7 BS EN 3863:2013EN 3863:2013 (E) 3 Foreword This document (EN 3863:2013) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After
13、enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a nat
14、ional standard, either by publication of an identical text or by endorsement, at the latest by July 2013, and conflicting national standards shall be withdrawn at the latest by July 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent ri
15、ghts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
16、 Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the U
17、nited Kingdom. BS EN 3863:2013EN 3863:2013 (E) 4 Introduction This standard is part of the series of EN non-metallic materials standards for aerospace applications. The general organisation of this series is described in EN 4385. This standard is a level 3 document as defined in EN 4385. It has been
18、 prepared in accordance with EN 4386. BS EN 3863:2013EN 3863:2013 (E) 5 1 Scope This European Standard defines the requirements for the determination of the flatness of monolithic glass transparencies for aircraft applications. The method is designed to eliminate the effect of the glass deflecting u
19、nder its own weight, thus eliminating false results. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest ed
20、ition of the referenced document (including any amendments) applies. EN 4385, Aerospace series Non-metallic materials General organisation of standardisation Links between types of standards 1)EN 4386, Aerospace series Non-metallic materials Rules for the drafting and presentation of test method sta
21、ndards 1)3 Terms, definitions, symbols and abbreviations Not applicable. 4 Health, safety and environment This European Standard does not necessarily include all health, safety and environment requirements, associated with its use. Persons using this European Standard shall be familiar with normal l
22、aboratory / test house practices. It is the responsibility of the user to establish satisfactory health, safety and environment practices and to ensure conformity with any European, National or local laws / regulations. 5 Principle/technique The transparency is held in a vertical position such that
23、its mean plane is parallel to a reference plane. The gap between the glass and the reference plane is then measured at predetermined positions by means of wedge gauges. 1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). BS EN 3863:2013EN 3863:2013 (E
24、) 6 6 Resources 6.1 Apparatus/facilities A stand to hold the transparency in a vertical position (see Figure 1). The stand shall have two nearly vertical side-members, at a greater width spacing than the glass, drilled at equal pitch. These side-members shall be fixed at the same angle to the vertic
25、al, not to exceed 0,1 radians, and together shall define a reference plane. A steel straight edge of greater size than the stand. Pegs, which are inserted into the drilled holes in the stand side members, and support the straight edge at defined vertical intervals. Three adjustable support pads agai
26、nst which to support the transparency. Wedge gauges. 6.2 Materials/reagents Not applicable. 6.3 Qualification of personnel Not applicable. 7 Test samples/test pieces Not applicable. 8 Test procedure See Figure 1. The transparency shall be set up in the support stand with an average gap of 1 mm to 2
27、mm from the reference plane. The straight edge shall be supported on the pegs at the lowest level, and the gap between the transparency and the reference plane measured using the wedge gauges. The gap shall be measured at horizontal intervals of 100 mm across the width of the glass. The straight edg
28、e shall then be moved 100 mm vertically, and the horizontal measurements repeated. The whole process shall then be repeated at 100 mm vertical intervals until the whole of the area of the transparency has been measured. All measurements shall be made to an accuracy of 0,1 mm. NOTE 1 In order to show
29、 any local distortion of the surface, the measurements of thermally tempered glass that has been tong supported in the furnace may need to be made at an increased frequency. NOTE 2 It is acceptable to make the measurement using a computerised system, having an identical or a better accuracy. BS EN 3
30、863:2013EN 3863:2013 (E) 7 9 Expression of results All measurements shall be recorded in millimetres to the first decimal place. The arithmetic mean of all of the gap measurements shall be determined. This arithmetic mean shall then be subtracted from each individual gap measurement, and the resulti
31、ng difference reported in chart form, as in the example shown in Figure 2. 10 Measurement uncertainties The precision of this test method is not known because inter-laboratory data are not available. 11 Designation Not applicable. 12 Test report The test report shall include: reference to the test m
32、ethod designation; designation of the apparatus; any other information relevant to the test method; identification and traceability of the semi-finished product to be tested, in accordance with the technical specification; expression of results; traceability to test apparatus used; traceability to i
33、ndividual performing the test work; any incident which may have affected the results; any deviation from the test method standard; date of test. BS EN 3863:2013EN 3863:2013 (E) 8 Key 1 straight edge support and pegs 2 adjustable support pads 3 sample under test 4 wedge feeler gauge 5 straight edge 6
34、 sample supports 7 0.1 rads from vertical Figure 1 Flatness measurement apparatus BS EN 3863:2013EN 3863:2013 (E) 9 Dimensions in millimetres Key 1 lower edge of glass Figure 2 Recording of flatness (example) This page deliberately left blankThis page deliberately left blankBSI is the independent na
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