BS ISO BRITISH STANDARD 16247:2004 Road yehicles Detection of exhaust system leaks Helium test method and detection device specification ICS43.060.20 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTL British Standards BS ISO 16247:2004 National foreword This British Standard reproduces verbatim IS0 16247:2004 and implements it asthe UKnational standard. The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled "International Standards Correspondence Index", or by using the “Search" facility of the BSI Electronic Catalogue or of British Standards Online. 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 does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages i and ii, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the documentwaslastissued. This British Standard was Amendments issued since publication published under the authority of the Standards Policy and Strategy Committee Amd. No. Date Comments on 30 January 2006 C BSI 30 January 2006 ISBN 0 580 47234 5 BS ISO 16247:2004 INTERNATIONAL ISO STANDARD 16247 First edition 2004-10-15 Road vehicles Detection of exhaust system leaks Helium test method and detection device specification Véhicules routiers Détection des fuites du dispositif d'eéchappement- Methode d'essai a I'hélium et spécification du dispositif de détection Reference number ISO 16247:2004(E) ISO ii BS ISO 16247:2004 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 all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheiSO/lECDirectives,Part2 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. tests. ii blank BS ISO 16247:2004 Road vehicles Detection of exhaust system leaks Helium test method and detection device specification 1 Scope This International Standard specifies a helium test method for detecting and localizing gas leaks in the exhaust depending on the leak rate to be detected, iSO 13556. The method is particularly applicable for use in exhaust emission tests, and in testing and diagnosis stations. 2 Normative references (including any amendments) applies. maintenance 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 exhaust system 3.2 leak outward exhaust gas flow or inward air flow which can affect the exhaust emissions measurement result 3.3 tracergas gas used for de