ISO INTERNATIONAL STANDARD 6944-2 First edition 2009-06-15 Fire containment - Elements of building construction- Part 2: Kitchen extract ducts Endiguement dufeu-Elements de construction Partie 2: Conduits de ventilation de la cuisine Reference number ISO 6944-2:2009(E) @ISO 2009 ISO 6944-2:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2009 - All rights reserved ISO6944-2:2009(E) Contents Page Foreword. IV Introductior 1 Scope 2 Normative reference 3 Termsanddefinitions 4 Test equipment.. 4.1 Fire outside duct. 4.2 Fire inside duct. 5 Test conditions 5.1 Fire outside duct... 5.2 Fire inside duct 6 Instrumentation 6.1 Fire outside duct. 6.2 Fire inside duct. 7 Test construction. 7.1 Fire outside duct... 7.2 Fire inside duct 8 Test procedure.. 8.1 Fire outside duct. 8.2 Fire inside duct. 9 Performance criteria. 9.1 Fire outside duct... 9.2 Fire inside duct ... 10 Expressionofresults. 11 Test report ..12 AnnexA (normative)Optional test equipmentand instrumentationFire inside duct .. AnnexB (informative) Historical information .15 Bibliography @ Iso 2009 All rights reserved ili ISO 6944-2:2009(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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. ISO 6944-2 was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 2,Fire containment. Iso 6944 consists of the following parts, under the general title Fire containment- Elements of building construction: Part 1:Ventilation ducts Part2:Kitchenextractducts iv Iso 2009-All rights reserved ISO 6944-2:2009(E) Introduction applicable to vertical and horizontal ducts, with or without branches, taking into account joints and exhaust openings,aswellassuspensiondevicesandpenetrationpoints duct.Forkitchen extract ducts,the inevitable build-up of grease on the inside surfaces canleadto a severe fire exposure and this is represented in the test method described in this part of isO 6944.Aburnerassembly, attached to a horizontal L-shaped combustion chamber, develops the heat required to obtain the temperatures. The combustion chamber is attached to the sample kitchen extract duct assembly. The kitchen extract duct is also L-shaped with both horizontal and ver