1、BRITISH STANDARDBS EN 4429:2006Aerospace series Textiles Testing of narrow woven fabrics Determination of warp bowThe European Standard EN 4429:2006 has the status of a British StandardICS 49.025.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g5
2、9g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 4429:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 48790 3National forewordThis British Standar
3、d was published by BSI. It is the UK implementation of EN 4429:2006.The UK participation in its preparation was entrusted to Technical Committee ACE/39, Textiles for aerospace purposes.A list of organizations represented on ACE/39 can be obtained on request to its secretary.This publication does not
4、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORM
5、EN 4429August 2006ICS 49.025.60English VersionAerospace series - Textiles - Testing of narrow woven fabrics -Determination of warp bowSrie arospatiale - Textiles - Essais des tissus troits -Dtermination du cintrage sens chaneLuft- und Raumfahrt - Textilien - Prfung von SchmalGeweben - Bestimmung der
6、 KonizitetThis European Standard was approved by CEN on 24 June 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographica
7、l references concerning such nationalstandards 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 translationunder the responsibility of a CEN membe
8、r into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
9、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All
10、 rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4429:2006: E2 Contents Page Foreword3 Introduction .4 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Health and safety .4 5 Principle/technique5 6 Resources.5 7 Test samples/T
11、est pieces .5 8 Testing procedure6 9 Expression of results 6 10 Measurement uncertainties 7 11 Designation 7 12 Test report 7 EN 4429:20063 Foreword This European Standard (EN 4429:2006) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). Aft
12、er 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
13、national standard, either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. Attention is drawn to the possibility that some of the elements of this document may be the subject o
14、f patent rights. 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 organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus,
15、 Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 4429:20064 Introduction This standard
16、 is part of the series of EN non-metallic materials for aerospace applications. The general organization of this series is described in EN 4385. This standard is a level 2 document as defined in EN 4385. 1 Scope This standard defines the general requirements for the determination of warp bow of narr
17、ow woven fabrics by measurement testing. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendm
18、ents) applies. EN 4385, Aerospace series Non-metallic materials General organisation of standardisation Links between types of standards. 1)EN 4415, Aerospace series Non-metallic materials Textiles Narrow woven fabrics Technical specification. 3 Terms and definitions For the purposes of this standar
19、d, the following terms and definitions apply. 3.1 warp bow the deformation (or deflexion “f“) which a narrow woven fabric takes in its plane with respect to the rectilinear and parallel edges which it should have 4 Health and safety This standard does not necessarily include all health and safety re
20、quirements, associated with its use. Persons using this standard shall be familiar with normal laboratory/test house practices. It is the responsibility of the user to establish satisfactory health and safety practices and to ensure conformity with any European, National or local laws / regulations.
21、 1) Published as AECMA Prestandard at the date of publication of this standard. EN 4429:20065 5 Principle/technique The test consists in measuring the warp bow of a narrow woven fabric laid on a plane surface after conditioning. 6 Resources 6.1 Apparatus/facilities The characteristics of the test me
22、thods are listed as follows: A test plate of dimensions (1 200010+) mm (20005+) mm on which its longitudinal axis is traced (see Figure 1). A ruler having a minimum length of 1 m and accurate to one millimetre. A set square having minimum dimensions of (100 150) mm with a scale in mm on its longest
23、side and accurate to one millimetre. Key 1 Test plate 2 Longitudinal axis Figure 1 6.2 Materials/Reagents No requirements. 6.3 Qualification of personnel No requirements. 7 Test samples/Test pieces Cut three test pieces of a length of (1 200100) mm. EN 4429:20066 8 Testing procedure 8.1 Test piece c
24、onditioning Specimens shall be conditioned faced flat for at least 24 h, without any tension in a standard conditioning atmosphere according to EN 4415 and maintained in this atmosphere until the tests have been carried out. 8.2 Testing procedure The tests shall be performed in a standard atmosphere
25、 according to EN 4415. Lay the specimen flat without tension, approximately along the longitudinal axis of the test plate by “tapping“ it, if necessary, but taking care not to incurvate or redress it. Leave it aside for at least 1 min. Position the ruler to make the graduations 0 mm and 1 000 mm coi
26、ncide with the specimens inside border (see Figure 2). Place the set square along the ruler taking care to not move the specimen and measure the maximum distance, in millimetres, between the specimens inside edge and the ruler. Repeat this procedure for the other two specimens. Key 1 Warp bow measur
27、ement 2 Set square 3 Specimen 4 Ruler Figure 2 9 Expression of results Calculate the arithmetic mean of the three values and express it in millimetres. EN 4429:20067 10 Measurement uncertainties The precision of this test method is not known because inter-laboratory data are not available. 11 Design
28、ation EXAMPLE Identity block EN4429 Number of this standard 12 Test report This test report shall include: reference to the test method designation; any other information relevant to the test method (test condition, test equipment, test procedure); identification and traceability of the product to b
29、e tested, in accordance with the technical specification; identification and traceability of the test pieces taken from the samples (number, preparation, method, conditioning, origin); expression of results (individual values and arithmetic mean); traceability to individual performing the test work;
30、 any incident which may have affected the results; any deviation from the test method standard; date of test. EN 4429:2006BS EN 4429:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents
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