ISO INTERNATIONAL STANDARD 23993 First edition 2008-02-01 Thermal insulation products for building equipment and industrial installations Determination of design thermal conductivity Produits isolants thermiques pour I'équipement du batiment et les installations industrielles Determination de la conductivite thermique utile Reference number ISO 23993:2008(E) @ ISO 2008 ISO23993:2008(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 shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In 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 ?ISO2008 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-1211 Geneva 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 2008 - All rights reserved ISO 23993:2008(E) Contents Page Foreword. IV Introduction 1 Scope 2 Normative references . 3 Terms and definitions... 4 Symbols.. 5 Determination of declared thermal conductivity .. Determination of the design value of thermal conductivity .. 7 Conversion of available data.. 7.1 General.. 7.2 Conversion factor for temperature difference 7.3 Conversion factor for moisture 7.4 Conversion factor for ageing. 7.5 Conversion factor for compression 7.6 Conversion factor for convection ... 7.7 Conversionfactorforthicknesseffect. 7.8 Conversion factor for regular joints . 7.9 Additional thermal conductivity for regularly insulation-related thermal bridges, e.g. spacers...... Annex A (normative) Conversion factors ... Annex B (informative) Examples of determination of the design thermal conductivity . Annex C (informative) Approximate values of conversion factors ... Bibliography.... @Iso 2008 -All rights reserved ili ISO 23993:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. 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 ISO 23993 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 89, Thermal performance of buildings and building components, in collaboration with ISO Technica Calculation methods, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). This International Standard is one of a series of standards on methods for the design and evaluation of the iv @ ISo 2008 - All rights reserved ISO 23993:2008(E) Introduction The establishment of design values for thermal conductivity for the calculation of the thermal performance of conditions of any individual insulation system. Among these influences could be: be employed; the thickness effect; 一 the effect of moisture in the insulant; They are well established in some cases and for some materials. Where experience is lacking and conversion fact