BS ISO BRITISH STANDARD 18207:2006 Road vehicles Trailers up to 3,5 t - Control of welded towing brackets for coupling ball after fatigue testing ICS 43.040.70; 43.100 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSIS018207:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 18207:2006. The UK participation in its preparation was entrusted to Technical Committee AUE/8, Undergear for caravans and light trailers. A list of organizations represented on AUE/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 obligations. This British Standard was Amendments issued since publication published under the authority of the Standards Policy and Amd. No. Date Comments Strategy Committee on 30 November 2006 @ BSI 2006 ISBN0580495175 BS ISO 18207:2006 INTERNATIONAL ISO STANDARD 18207 First edition 2006-10-01 Road vehicles Trailers up to 3,5 t - Control of welded towing brackets for coupling ball after fatigue testing Vehiculesroutiers-Remorques jusqu'a3,5t-Controledessupports de boule d'attelage mecanosoudés apres essai de fatigue Reference number ISO18207:2006(E) ISO ii BS IS0 18207:2006 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on allmatters of electrotechnical standardization. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO18207 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 4, Caravans and lighttrailers. ii BSISO18207:2006 Introduction AlmostallofthetowingbracketsavailableontheEuropeanmarketaremadeof steelpartsconstructedby mass production which generates welding defects that do not necessarily lead to cracking or fatigue ruptures during the test. The uniqueness of control after fatigue testing thus leads to the detection of indications1) of which the origin, Welding defects which have not developed after the imposed 2×,1o° cycles, thus deduced without seriousness; Fatigue cracks initiated during the test or defects of welding having started a process of cracking, constituting a crippling deterioration. and/or microfractographic examination under a scanning electron microscope), which is not possible in a systematic way for economic reasons within the framework of these tests. these long and expensive examinations. 1) As defined in NF A 09-500 for control by penetrant testing or magnetic images, and in NF A 09-590 for control by magnetic particle testing. The often employed term “default" is used in the following text to designate these indications. iv BSISO18207:2006 Road vehicles Trailers up to 3,5 t Control of welded towing brackets for coupling ball after fatigue testing 1 Scope This International Standard defines a simplified and reliable check procedure of the mechanical coupling whichspecifyadynamictestofmechanical resistanceatthe conclusionofwhichthesedevicesshouldpresent neither fractures, splits, cracks, nor visible external deteriorations caused by the test. This International Standard is applicable to all the components of the mechanical coupling devices whose failure can cause the fracture of the attachment, manufactu