1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Glass in building - Insulating glass unitsPart 2: Long term test method and requirements for moisture penetrationBS EN 1279-2:2018National forewordThis British Standard is the UK implementation of EN 1279-2:2018. It sup
2、ersedes BS EN 1279-2:2002, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/520, Glass and glazing in building.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to inclu
3、de all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 89457 2ICS 81.040.20; 91.100.99Compliance with a British Standard cannot confer immunity from legal obligatio
4、ns.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 1279-2:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1279-2July 2018ICS 81.040.20 Su
5、persedes EN 1279-2:2002EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 1279-2:2018: EAll rights of exploitation in any form and by any means reserved worldwide for
6、CEN national MembersGlass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetrationVerre dans la construction - Vitrage isolant - Partie 2 : Mthode dessai de longue dure et exigences en matire de pntration dhumiditGlas im Bauwesen - Mehrscheiben-I
7、solierglas - Teil 2: Langzeitprfverfahren und Anforderungen bezglich FeuchtigkeitsaufnahmeThis European Standard was approved by CEN on 16 March 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
8、of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German
9、). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, C
10、yprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
11、 United Kingdom.English VersionEN 1279-2:2018 (E)European foreword iii1 Scope . 52 Normative references 53 Terms and definitions . 54 Symbols and abbreviations . 55 Requirements 66 Method of long-term test 66.1 Principle 66.2 Number, description and selection of test specimens . 66.3 Climate conditi
12、ons in cabinet . 66.4 Procedure 86.5 Calculation of moisture penetration index I 96.6 Precision of test method . 97 Determination of moisture content .107.1 Methods available 107.2 Sampling method . 107.2.1 Sampling of desiccant in bulk 107.2.2 Sampling of preformed flexible spacer incorporating des
13、iccant 118 Test report 13Annex A (normative) Moisture content in insulating glass units without desiccant 15iiContents PageBS EN 1279-2:2018EN 1279-2:2018 (E)European forewordThis document (EN 1279-2:2018) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of wh
14、ich is held by NBN.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2019 and conflicting national standards shall be withdrawn at the latest by January 2019.Attention is drawn to the possib
15、ility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 1279-2:2002.The main changes compared to the previous edition EN 1279-2:2002 are:a) Measurement of the dew
16、 point of the 15 specimens was removed, the specimens are randomly selected;b) The tolerance of some temperature was increased: During cycling, l= (18,0 2,0) C; During the slopes: = (s 4,0) C/h (for other specimens than the centred one); During constant temperature: c= (58 1) C;c) The time to move t
17、he specimens from one cabinet to another was increased;d) The minimum storage duration before testing was reduced to 3 days;e) Test report was revised adding a full description of the test specimens;f) Annex A: Dew point was moved to part 6;g) Annex B: Measurement of the moisture content was moved t
18、o main part (sampling) and part 4 Annex E (measuring with change of temperature from 950 C to 540 C);h) Annex C: Karl Fisher was moved to main part (sampling) and part 4 Annex F (measuring);i) Annex D: Measurement of Tc was moved to part 4 Annex E (desiccant in bulk) or F (Karl Fisher);j) Moisture c
19、ontent in insulating glass units without desiccant was moved to Annex A.This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.This European Standard “Glass in Building - Insulating glass units” consists of the following Parts:
20、 Part 1: Generalities, system description, rules for substitution, tolerances and visual quality; Part 2: Long term test method and requirements for moisture penetration; Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances; Part 4: Methods of test
21、 for the physical attributes of edge seal components and inserts; Part 5: Product standard; Part 6: Factory production control and periodic tests. These parts are inextricably bound up with each other.iiiBS EN 1279-2:2018EN 1279-2:2018 (E)According to the CEN-CENELEC Internal Regulations, the nation
22、al standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu
23、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.ivBS EN 1279-2:2018EN 1279-2:2018 (E)1 ScopeThis document describes the test method for the determination of moisture penetration index and s
24、pecifies the requirements for limit values for insulating glass units madea) in accordance with EN 1279-1:2018 and manufactured to EN 1279-6:2018; orb) for the purpose to demonstrate that components (e.g. edge seals or spacers) will allow the insulating glass unit to conform to the requirements give
25、n in EN 1279-1:2018, Clause 6.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the r
26、eferenced document (including any amendments) applies.EN 1279-1:2018, Glass in Building Insulating glass units Part 1: Generalities, system description, rules for substitution, tolerances and visual qualityEN 1279-4:2018, Glass in Building Insulating glass units Part 4: Methods of test for the physi
27、cal attributes of edge seal components and insertsEN 1279-6:2018, Glass in Building Insulating glass units Part 6: Factory production control and periodic tests3 Terms and definitionsFor the purposes of this document, the terms and definitions given in EN 1279-1:2018 apply.ISO and IEC maintain termi
28、nological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Symbols and abbreviationsSymbol Characteristic UnitAWAC Available water adsorption capacity % by wei
29、ghtI Moisture penetration index of the IGU fraction or percentageIavAverage value of the moisture penetration indices I within tested set of IGUs fraction or percentageTcStandard moisture adsorption capacity of desiccant % by weightTc,avAverage standard moisture adsorption capacity of desiccant Tc%
30、by weightTfFinal moisture content of desiccant after ageing according to standard-ized ageing conditions% by weightTiInitial moisture content of desiccant before ageing % by weightTi,avAverage initial moisture content of desiccant Tiobtained over four measurements% by weight Temperature of the exter
31、nal face of test specimens in test cabinet CcTemperature of the external face of the central test specimen in test cabinet during constant temperature phaseChHigh temperature of the external face of the central test specimen in the test cabinet during the high humidity/temperature cycling phaseClLow
32、 temperature of the external face of the central test specimen in the test cabinet during the low humidity/temperature cycling phaseC5BS EN 1279-2:2018EN 1279-2:2018 (E)Symbol Characteristic UnitsTemperature of the external face of the central test specimen in the test cabinet as the cycle moves bet
33、ween high temperature and low temper-ature and vice versaC5 RequirementsAverage moisture penetration index (Iav) and moisture penetration index (I) shall be determined in accordance with Clause 6.The average moisture penetration index (Iav) of five test specimens shall not exceed 0,20 (or 20 %).The
34、moisture penetration index of any test specimen shall not exceed 0,25 (or 25 %).6 Method of long-term test6.1 PrincipleInsulating glass unit (IGU) specimens are exposed to a climate test. The initial and final moisture content of the desiccant are determined. I values for each unit tested and Iav va
35、lue are calculated for each unit tested.6.2 Number, description and selection of test specimens15 test specimens which shall be representative of the system description (see EN 1279-1:2018, Annex A), and shall consist of two panes of 4 mm glass in accordance with EN 1279-1:2018, 5.2. If 4 mm glass i
36、s not available, the thickness as near as possible to 4 mm shall be used. The length shall be (502 2) mm and the width shall be (352 2) mm. The cavity width shall be 12 mm, or if not manufactured, the cavity width shall be as near as possible to 12 mm.Specimens of triple glazed units may also be tes
37、ted. Length, width and cavity width should fulfil the above mentioned requirements. The I-value of the individual cavities may be different. The requirement given in Clause 5 applies to both individual cavities.After production, the test specimens shall be stored for fourteen days and additionally c
38、onditioned for a minimum of three days at standard laboratory conditions.Number the specimens by random selection. Select the specimens as indicated in Table 1.Table 1 Designation of specimens Specimen number Designate specimens for:1, 2, 3 and 4 Measurement of initial moisture content of desiccant
39、(Ti)5, 6, 7, 8 and 9 Climate testing and measurement of final moisture content of desiccant (Tf)10, 11, 12 and 13If used in case of breakage, spare specimens shall be aged in accordance with the full climate test for measurement of final moisture content of desiccant (Tf)14 and 15Disregarded or meas
40、urement of standard moisture adsorption capacity of desiccant (Tc) as requiredThe average moisture penetration index Iavshall be the average of five specimens .6.3 Climate conditions in cabinetThe climate test procedure consists of two subsequent steps.6 BS EN 1279-2:2018EN 1279-2:2018 (E)Key1 cycli
41、ng2 moving specimens from cabinet to cabinet3 constant temperatureFigure 1 Overview of climate test conditionsFigure 2 Temperature/time conditions during cyclingFirst step includes a phase of 56 temperature cycles of 12 h from (18 2) C to (+53 1) C with slopes of plus or minus (14 4) C/h as drawn in
42、 Figure 2. The relative humidity is maintained 95 % at least during the phase at 53 C. During the time of the cycle when temperature is below 20 C, the humidity control is interrupted. Condensation on test specimens from time to time is allowed. Time intervals: t1 = 5 h 5 min, t2 = 1 h 5 min, t3 = 5
43、 h 5 min, t4 = 1 h 5 min,7BS EN 1279-2:2018EN 1279-2:2018 (E) t5 = total cycle time 12 h; Temperatures of the centrally located test specimen during cycle: h= (+53,0 1,0) C (high temperature); l= (18,0 2,0) C (low temperature); s= (+(14 4) or (14 4) respectively) C/h (slopes).The temperature of that
44、 centrally located test specimen shall be recorded continuously.Second step includes seven weeks (1 176 4) h exposure at c(+58 1) C and at 95 % r.h. Condensation on the test specimens from time to time is allowed.The two steps of the procedure can be carried out in a single cabinet or in two separat
45、e cabinets. If two cabinets are used, the specimens shall be moved within 96 h from one cabinet to the other.If any interruption occurs in the climate test conditions, the test duration is extended by the interruption time not exceeding a total of 96 h. If the interruption time exceeds 96 h, the tes
46、t is stopped and a re-test on new specimens is required.The temperature of the centrally located test specimen shall be controlled at least one a year with at least 90 % load and recorded.The glass temperatures of the other test specimens in the cabinet shall be:a) during step 1: high temperature: =
47、 (h 1,0) C; low temperature : = (l 2,0) C; slopes: = (s 4,0) C/h;b) during step 2: = (c 1,0) C.The distance between the vertically placed test specimens shall not be less than 15 mm.6.4 ProcedureStore the specimens for a minimum of 3 days under standard laboratory conditions.Measure the initial mois
48、ture content (Ti) of the four selected test specimens (numbers 1, 2, 3 and 4) in accordance with Clause 7.Submit the five selected test specimens (numbers 5, 6, 7, 8 and 9) to the climate conditions in accordance with 6.3.On completion of the climate test, store the specimens for a minimum of 1 week
49、 under standard laboratory conditions.Measure the final moisture content (Tf) of the five aged specimens in accordance with Clause 7.NOTE In order to be able to determine the requirement for the short climate test on moisture penetration, it is advised that parallel with this procedure the periodic climate test in accordance with EN 1279-6:2018 is carried out.8 BS EN 1279-2:2018EN 1279-2:2018 (E)6.5 Calculation of moisture penetratio
