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1、 Reference number ISO 20492-1:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 20492-1 First edition 2008-10-01 Glass in buildings Insulating glass Part 1: Durability of edge seals by climate tests Verre dans la construction Verre isolant Partie 1: Rsistance des fermetures de ct par essais climatiques Co
2、pyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) PDF disclaimer This PDF file may contain embed
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5、ere 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. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights res
6、erved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the reque
7、ster. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO L
8、icensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions.1 4 Symbol
9、s and abbreviated terms2 5 Requirements.3 6 Test methods .4 7 Methods of measurement.14 8 Test report15 Annex A (normative) Reference method for frost/dew point temperature measurement.18 Annex B (normative) Moisture content measurement according to the 950 C drying method.20 Annex C (normative) Moi
10、sture content measurement by the Karl Fischer method 24 Annex D (normative) Establishing the standard moisture adsorption capacity of desiccants30 Bibliography32 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resa
11、le, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) iv ISO 2008 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work
12、 of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmen
13、tal, 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The ma
14、in 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. At
15、tention 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 20492-1 was prepared by Technical Committee ISO/TC 160, Glass in building, Subcommittee SC 1, Produ
16、ct considerations. ISO 20492 consists of the following parts, under the general title Glass in buildings Insulating glass: Part 1: Durability of edge seals by climate tests Part 2: Chemical fogging tests Part 3: Gas concentration and gas leakage Part 4: Test methods for the physical attributes of ed
17、ge seals Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) ISO 2008 All rights reserved v Intr
18、oduction This part of ISO 20492 consists of a series of procedures for testing the performance of pre-assembled, permanently sealed insulating glass units or insulating glass units with capillary tubes that have been intentionally left open. This part of ISO 20492 is intended to help ensure that ene
19、rgy savings are made, as the U-value and solar factor (solar-heat gain coefficient) do not change significantly; health is preserved, because sound-reduction and vision do not change significantly; safety is provided, because mechanical resistance does not change significantly. This part of ISO 2049
20、2 also covers additional characteristics that are important to the trade and includes the marking of the product (i.e., the CE marking or markings of other regulatory groups). It is necessary to consider distinct markets for insulating glass. As within each market there are technical differences wit
21、h respect to rebate sizes, vision lines and methods of application, two approaches are included in this part of ISO 20492. Approach 1 addresses requirements for markets such as North America. Approach 2 addresses requirements for markets such as Europe. Each approach includes separate test methods a
22、nd specifications pertaining to minimum requirements for the durability of edge seals as determined by climate tests. This part of ISO 20492 does not cover physical requirements of sealed-glass insulating units such as appearance, thermo-physical properties, heat and light transmission and glass dis
23、placement. The main intended uses of the insulating glass units are installations in buildings and construction, such as in windows, doors, curtain walling, skylights, roofs and partitions where protection against direct ultraviolet radiation exists at the edges. NOTE In cases where there is no prot
24、ection against direct ultraviolet radiation at the edges, such as structural- sealant glazing systems, it is still necessary to review factors such as sealant longevity when exposed to long term ultraviolet light and the structural properties of the sealant for these applications. For more informati
25、on on the requirements for structural-sealant glazing applications, reference can be made to ASTM C1369 1, ASTM C1249 2 and ASTM C1265 3. The test methods in this part of ISO 20492 are intended to provide a means for testing the performance of the sealing system and construction of sealed, insulatin
26、g glass units. Sealed, insulating glass units tested in accordance with these method are not intended for long-term immersion in water. The options for testing apply only to sealed, insulating glass units that are constructed with glass. The methods of this part of ISO 20492 might not be applicable
27、in certain cases, such as for insulating glass units containing spandrel glass or absorptive coatings, as these products can experience field temperatures that exceed the temperature limitations of the sealant. Copyright International Organization for Standardization Provided by IHS under license wi
28、th ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009
29、19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 20492-1:2008(E) ISO 2008 All rights reserved 1 Glass in buildings Insulating glass Part 1: Durability of edge seals by climate tests 1 Scope This part of ISO 20492 establishes two methods fo
30、r testing the durability of edge seals of insulating glass units by means of climate tests. The two methods are designated as Approach 1 for markets such as North America and Approach 2 for markets such as Europe. This part of ISO 20492 is applicable to pre-assembled, permanently sealed, insulating
31、glass units with one or two airspaces, and with capillary tubes that are intentionally left open to equalize pressure inside the unit with the surrounding atmosphere. This part of ISO 20492 is not applicable to sealed, insulating glass units that contain a spandrel glass coating. This part of ISO 20
32、492 does not apply to insulating glass (IG) units whose function is decorative only. 2 Normative references The following reference documents are indispensable for the application of this document. For dated references, only the cited edition applies. For undated references, the latest edition of th
33、e referenced document (including any amendments) applies. ISO 760, Determination of water Karl Fischer method (General method) EN 572-1, Glass in building Basic soda lime silicate glass products Definitions and general physical and mechanical properties EN 572-2, Glass in building Basic soda lime si
34、licate glass products Float glass EN 1279-1, Glass in building Insulating glass units Part 1: Generalities, dimensional tolerances and rules for the system description ASTM E546, Standard Test Method for Frost Dew Point of Sealed Insulating Glass Units ASTM E631, Standard Terminology of Building Con
35、structions ASTM C1036, Standard Specification for Flat Glass 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1279-1, ASTM E631 and the following apply. Copyright International Organization for Standardization Provided by IHS under license with ISO Lic
36、ensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) 2 ISO 2008 All rights reserved 3.1 standard laboratory conditions ambient temperature of (23 2) C and a relative humidity of (50 5) % 3.2 stand
37、ard moisture-adsorption capacity capacity of a desiccant material to adsorb a quantity of moisture under controlled limit environmental conditions 3.3 controlled limit environmental conditions environment temperature of 10 C with a dew-point temperature of 5 C, giving a relative humidity of 32,8 % 3
38、.4 moisture penetration index amount of drying capacity consumed after standardized ageing conditions 3.5 accuracy accuracy of the test method itself within statistical confidence limits of 99 % 3.6 frost/dew point temperature at which water, organic vapour or other chemicals begin to appear on the
39、interior glass surface of a sealed, insulating glass unit 3.7 sealed, insulating glass unit pre-assembled unit consisting of panes of glass that are sealed at the edges and separated by dehydrated space(s), intended for use in buildings NOTE The unit is normally used for windows, window walls, pictu
40、re windows, sliding doors, patio doors, or other types of fenestration. 4 Symbols and abbreviated terms For the purposes of this document, the following symbols and abbreviations apply. I moisture penetration index (can be expressed in decimal or in percentage terms) Iav average value of the moistur
41、e penetration index, I, based on five measurements mc mass of dish plus desiccant plus water adsorbed from 32 % r.h. air mf mass of dish plus desiccant plus water initially adsorbed plus water adsorbed when subjected to the climate conditions in the chamber mi mass of dish plus desiccant plus water
42、initially adsorbed Mm mass of desiccant in mixtures with non-desiccant material mr mass of dish plus desiccant plus water adsorbed in equilibrium with a defined reference level of relative humidity of air, or dish plus dried desiccant at high temperatures Mt total mass of desiccant when, for the pur
43、pose of testing, in a mixture with non-desiccant material, the non-desiccant material is replaced by the same volume of desiccant mo mass of dish when empty, clean and dry Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 No
44、t for Resale, 01/29/2009 19:42:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 20492-1:2008(E) ISO 2008 All rights reserved 3 R ratio between the masses of desiccant Mm and Mt r.h. relative humidity Tc standard moisture adsorption capacity of desiccant Tc,av average
45、standard moisture adsorption capacity of desiccant, Tc, obtained over two measurements Tf final moisture content of desiccant Tf,u uncorrected final moisture content of desiccant Ti initial moisture content of desiccant Ti,av average initial moisture content of desiccant, Ti, obtained over four meas
46、urements Ti,u uncorrected initial moisture content of desiccant temperature of test specimens in test chamber c temperature of the central test specimen in test chamber during constant temperature phase h high temperature of the central test specimen in the test chamber during the high humidity/temp
47、erature cycling phase l low temperature of the central test specimen in the test chamber during the high humidity/temperature cycling phase s temperature of the central test specimen in the test chamber as the cycle moves between high temperature and low temperature and vice versa 5 Requirements 5.1
48、 Approach 1 Final frost/dew point The six test specimens that complete the weather cycle and high-humidity phases of the test in 6.1 shall be unbroken and without deposits in the airspaces. The final frost/dew points of all airspaces shall be 40 C or colder when measured in accordance with ASTM E546 or equivalent. 5.2 Approach 2 Moisture-penetration index The following values shall be verified on test specimens that are submitted t