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1、BRITISH STANDARD BS EN 4057-307:2006 Aerospace series Cable ties for harnesses Test methods Part 307: Resistance to ultra violet radiation The European Standard EN 4057-307:2006 has the status of a British Standard ICS 49.060 ? Licensed Copy: London South Bank University, London South Bank Universit
2、y, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 4057-307:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007 ISBN 978 0 580 50546 1 National foreword This British Standard was published by BSI.
3、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 EN 4057-306:2006, BS EN 4057-401:2006, BS EN 4057-4
4、02:2006, 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 published) and BS EN 4056-005 (to be published) supersedes
5、BS G 246:1991 which will be withdrawn upon publication of these standards.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 Installations Accessories, tools and terminations. A l
6、ist 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 British Standard cannot confer immunity from legal
7、obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4057-307 December 2006 ICS 49.060 Engl
8、ish Version Aerospace series - Cable ties for harnesses - Test methods - Part 307: Resistance to ultra violet radiation Srie arospatiale - Frettes de cblage pour harnais - Mthodes dessais - Partie 307 : Rsistance aux radiations des ultra-violet Luft- und Raumfahrt - Befestigungsbnder fr Leitungsbnde
9、l - Prfverfahren - Teil 307: UV-Bestndigkeit This European Standard was approved by CEN on 28 October 2005. 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 alterat
10、ion. 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 translat
11、ion 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hung
12、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centr
13、e: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4057-307:2006: E Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled
14、 Copy, (c) BSI 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Apparatus .4 5 Preparation of specimen.4 6 Procedure .5 7 Requirements.5 EN 4057-307:2006 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2
15、007, Uncontrolled Copy, (c) BSI 3 Foreword This document (EN 4057-307:2006) has been prepared by the 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- ceiv
16、ed 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 national standard, either by publication of an identical text or by endorsement, at the latest by June 2007,
17、and conflicting national standards shall be withdrawn at the latest by June 2007. Attention is drawn 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. Acco
18、rding to the CEN/CENELEC Internal Regulations, the national standards organizations of the following 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, Lith
19、uania, Luxem- bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer- land and the United Kingdom. EN 4057-307:2006 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled Copy, (c)
20、BSI 4 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 this document. For dated refer- ences, only the edition cit
21、ed 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 operating light and water-exposure apparatus (fluorescent
22、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 Clause 6 using UV B tubes. 5 Preparation of specimen Pre
23、paration 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 exposed to the test environment. To provide rigidity, fle
24、xible 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 (ASTM), 1916 Race Street, Philadelphia, PA 19103. EN 4057
25、-307:2006 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 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
26、fill the racks. Fill the empty spaces with blank panels to maintain the test conditions 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
27、removed from the chamber. Both the exposed and unexposed samples shall be conditioned for 24 h in a chamber at (20 2 1 + ) 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 conditioni
28、ng the specimens are to be tested on tensile test machine capable of measuring elongation 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
29、for each group shall be calculated disregarding the highest and lowest figures. The percent 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 prod
30、uct standard. EN 4057-307:2006 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:10:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 4057-307:2006 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body
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