1、BRITISH STANDARDBS EN 4057-307:2006Aerospace series Cable ties for harnesses Test methods Part 307: Resistance to ultra violet radiationThe European Standard EN 4057-307:2006 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g4
2、4g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 4057-307:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50546 1National f
3、orewordThis British Standard was published by BSI. It is the UK implementation of EN 4057-307:2006. This standard, together with BS EN 4057-100:2006, BS EN 4057-201:2005, BS EN 4057-202:2005, BS EN 4057-301:2005, BS EN 4057-302:2006, BS EN 4057-303:2005, BS EN 4057-304:2006, BS EN 4057-305:2005, BS
4、EN 4057-306:2006, BS EN 4057-401:2006, BS EN 4057-402:2006, BS EN 4057-403 (to be published), BS EN 4057-404:2006, BS EN 4057-405:2005, BS EN 4057-406:2006, BS EN 4057-407:2005 and BS EN 4056-001:2006, BS EN 4056-002 (to be published), BS EN 4056-003 (to be published), BS EN 4056-004 (to be publishe
5、d) and BS EN 4056-005 (to be published) supersedes BS G 246:1991 which will be withdrawn upon publication of these standards.The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Panel ACE/6/-/8, Aerospace Inst
6、allations Accessories, tools and terminations.A list of organizations represented on ACE/6/-/8 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 a Brit
7、ish Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 4057-307December 2006ICS 49.060English VersionAerospace series - Cable ties for harnesses - Test methods -Part 307: Resistance to ultr
8、a violet radiationSrie arospatiale - Frettes de cblage pour harnais -Mthodes dessais - Partie 307 : Rsistance aux radiationsdes ultra-violetLuft- und Raumfahrt - Befestigungsbnder frLeitungsbndel - Prfverfahren - Teil 307: UV-BestndigkeitThis European Standard was approved by CEN on 28 October 2005.
9、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 bibliographical references concerning such nationalstandards may be obtained on app
10、lication 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 member into its own language and notified to the Central Secretariat has t
11、he 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
12、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 rights of exploitation in any form and by any means reservedworldwid
13、e for CEN national Members.Ref. No. EN 4057-307:2006: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Apparatus .4 5 Preparation of specimen.4 6 Procedure .5 7 Requirements.5 EN 4057-307:20063 Foreword This document (EN 4057-307:2006) has been prepared by t
14、he Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has re-ceived the approval of the National Associations and the Official Services of the member countries of A
15、SD, 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 June 2007, and conflicting national standards shall be withdrawn at the latest by June 2007. Attention is draw
16、n to the possibility that some of the elements of this document may be the subject of 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 followin
17、g countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain
18、, Sweden, Switzer-land and the United Kingdom. EN 4057-307:20064 1 Scope This standard determines test methods for the resistance of cable ties for harnesses to the exposure to ultra violet radiation. 2 Normative references The following referenced documents are indispensable for the application of
19、this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4056-001, Aerospace series Cable ties for harnesses Part 001: Technical specification ASTM G53-88, Standard practice for
20、operating light and water-exposure apparatus (fluorescent UV-condensation type) for exposure of non metallic materials1)3 Terms and definitions For the purposes of this standard, the terms and definitions in EN 4056-001 shall apply. 4 Apparatus The test apparatus shall be as specified in ASTM G53-88
21、 Clause 6 using UV B tubes. 5 Preparation of specimen Preparation of test pieces. Cut a length of the parallel portion of the cables tie, minimum length 75 mm. A minimum of 20 specimens are to be prepared. Half the test specimens are to be mounted in holders such that the ties outer surface will be
22、exposed to the test environment. To provide rigidity, flexible specimens may be attached to a backing panel made of Alumin-ium or other non-corrosive heat conductive material. The remaining test specimens are to be retained for later use. 1) Published by: American Society for Testing and Materials (
23、ASTM), 1916 Race Street, Philadelphia, PA 19103. EN 4057-307:20065 6 Procedure Mount the test specimen holders into the racks with the specimen outer surface facing the lamp. When the test specimens do not completely fill the racks. Fill the empty spaces with blank panels to maintain the test condit
24、ions within the chamber. Program the selected test conditions as specified below Test cycle UV periods 8 h at (55 3) C Humidity period 4 h at (40 3) C After the completion of a 1 000 h cycling the specimens are to be removed from the chamber. Both the exposed and unexposed samples shall be condition
25、ed for 24 h in a chamber at (20 21+) C with a relative humidity of (50 5) %. Immediately upon removal from the chamber the specimens are to be stored in an airtight container and tested within 1 h. After conditioning the specimens are to be tested on tensile test machine capable of measuring elongat
26、ion to an accuracy of 1 %. The gauge length shall be (25 1) mm and the jaw separation speed shall be (25 2,5) mm/min. The seven aged and seven not aged specimen are to be pulled and the average elongation at break for each group shall be calculated disregarding the highest and lowest figures. The pe
27、rcent change between aged and unaged groups shall then to be calculated. 7 Requirements The maximum change in average elongation at break between the aged and not aged specimen groups shall be specified in the product standard. EN 4057-307:2006BS EN 4057-307:2006BSI389 Chiswick High RoadLondonW4 4AL
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