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1、BRITISH STANDARD BS EN 1279-3:2002 Glass in building Insulating glass units Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances The European Standard EN 1279-3:2002 has the status of a British Standard ICS 81.040.20 ? BS EN 1279-3:2002 This Britis
2、h Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 8 January 2003 BSI 8 January 2003 ISBN 0 580 41078 1 National foreword This British Sta
3、ndard is the official English language version of EN 1279-3:2002. The UK participation in its preparation was entrusted by Technical Committee B/520, Glass and glazing in building, to Subcommittee B/520/2, Insulating glass products, which has the responsibility to: A list of organizations represente
4、d on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”,
5、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 of itself confer i
6、mmunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate t
7、hem in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 27 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EU
8、ROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1279-3 November 2002 ICS 81.040.20 English version Glass in building - Insulating glass units - Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances Verre dans la construction - Vitrage isolant prf
9、abriqu scell - Partie 3: Mthode dessai long terme et prescriptions pour le dbit de fuite de gaz et pour les tolrances de concentration du gaz Glas im Bauwesen - Mehrscheiben-Isolierglas - Teil 3: Langzeitprfverfahren und Anforderungen bezglich Gasverlustrate und Grenzabweichungen fr die Gaskonzentra
10、tion This European Standard was approved by CEN on 1 September 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographic
11、al references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN mem
12、ber into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,
13、 Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for
14、 CEN national Members. Ref. No. EN 1279-3:2002 E EN 1279-3:2002 (E) 2 Contents page Foreword4 1Scope 5 2Normative references 5 3Terms and definitions and symbols 6 4Requirements.8 4.1Gas leakage rate 8 4.2Tolerances on gas concentration.8 4.3Dew point and moisture penetration index.8 4.4Edge seal st
15、rength.8 4.5Additional requirements for other gases than argon, sulfurhexafluoride and air8 5Testing 8 5.1Principle of testing.8 5.2Apparatus .8 5.2.1Climate exposure equipment8 5.2.2Container for gas leakage rate measurement.9 5.2.3Gas analysis equipment9 5.2.4Gas sampling device .9 5.3Test specime
16、ns9 5.3.1Preparation of test specimens9 5.3.2Number of test specimens10 5.3.3Construction and appearance10 5.4Procedure .10 5.4.1Determination of internal volume of a test specimen10 5.4.2Climate exposure.10 5.4.3Measuring the gas leakage.10 5.4.4Analysis of gas.11 5.5Evaluation.11 6Precision of tes
17、t method.11 7Test report 11 Annex A (normative) Requirements for other gases13 A.1Durability of the gas and interaction with insulating glass components 13 A.2Effect on thermal- and sound insulation.13 A.3Assessment example with krypton gas filling14 Annex B (informative) Relationship between artifi
18、cial and natural ageing with regard to thermal and sound insulation 15 Annex C (informative) Determination of the gas leakage rate by gas chromatography.16 C.1Principle of method .16 C.2Equipment.16 C.2.1Full container16 C.2.2Ring container18 C.2.3Cooling trap19 C.2.4Gas chromatograph.19 C.2.5Connec
19、ting pieces.19 C.2.6Solvents19 C.2.7Purging and carrier gas.19 C.2.8Calibrating gas.20 C.3Preparation of test specimens21 EN 1279-3:2002 (E) 3 C.4Procedure .21 C.4.1Connection of the apparatus21 C.4.2Installation of the test specimen21 C.4.3Temperature.21 C.4.4Calibration21 C.4.5Measurement of the g
20、as leakage .21 C.4.6Blank test25 C.4.7Result25 Bibliography27 EN 1279-3:2002 (E) 4 Foreword This document EN 1279-3:2002 has been prepared by Technical Committee CEN/TC 129, “Glass in building“, the secretariat of which is held by IBN. This European Standard shall be given the status of a national s
21、tandard, either by publication of an identical text or by endorsement, at the latest by May 2003, and conflicting national standards shall be withdrawn at the latest by May 2003. This document is part of the series EN 1279 “Glass in building - Insulating glass units” that contains the following Part
22、s: Part 1: Generalities, dimensional tolerances and rules for the system description. 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 for the phy
23、sical attributes of edge seals. Part 5: Evaluation of Conformity. Part 6: Factory production control and periodic tests. The annexe A is normative. The annexes B and C are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
24、are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 1279-3:2002 (E) 5 1 Scope This European Standar
25、d is the product standard for insulating glass units, which defines insulating glass units, and ensures by means of an adequate evaluation of conformity to this standard that: energy savings are made because the U-value and solar factor do not change significantly; health is preserved because sound
26、reduction and vision do not change significantly; safety is provided because mechanical resistance does not change significantly. It covers additional characteristics that are of importance for trade. Marking conditions are included. The main intended uses of the insulating glass units are installat
27、ions in windows, doors, curtain walling, roofs and partitions where there exists protection against direct ultraviolet radiation at the edges. NOTEIn cases where there is no protection against direct ultraviolet radiation at the edges, such as structural sealant glazing systems, additional European
28、technical specifications should be followed. See Bibliography 2 and 3. This Part of this standard, which is inextricably bound up with the other Parts of the standard, covers: the gas leakage rate by testing; the gas concentration tolerances; as one means of verifying whether a product made in accor
29、dance with its system description, conforms with the relevant aspects of the definition of insulating glass units. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate pl
30、aces in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated by amendment or revision. For undated references, the latest edition of the publication referre
31、d to applies (including amendments). EN 572-1, Glass in Building - Basic soda lime silicate glass products - Part 1: Definitions and general physical and mechanical properties. EN 572-2, Glass in Building - Basic soda lime silicate glass products - Part 2: Float glass. EN 673, Glass in Building - De
32、termination of thermal transmittance (U value) - Calculation method. prEN 1279-1, Glass in Building - Insulating glass units - Part 1: Generalities, dimensional tolerances and rules for the system description. EN 1279-2, Glass in Building - Insulating glass units - Part 2: Long term test method and
33、requirements for moisture penetration. EN 1279-4, Glass in Building - Insulating glass units - Part 4: Methods of test for the physical attributes of edge seals. EN 1279-6, Glass in Building - Insulating glass units - Part 6: Factory production control and periodic tests. prEN 12758, Glass in Buildi
34、ng - Glazing and airborne sound insulation - Definitions and determination of properties. EN 1279-3:2002 (E) 6 3 Terms and definitions and symbols For the purposes of this European Standard, the terms and definitions given in prEN 1279-1 together with the following apply. 3.1 gas-filled insulating g
35、lass units insulating glass unit in which the cavity contains gas(es) in addition to air, usually for improving thermal and/or sound insulation 3.2 gas concentration c percentage by volume of gas in the cavity ciis the concentration of gas i; ci,ois the nominal value for a system of insulating glass
36、 and gas i which is the basis for testing sound insulation and/or calculating or testing thermal insulation to fix the respective Rw and U-value; ci,f is the estimated final concentration in percent of gas i. See annex A NOTEFor use of ci,o, see also EN 1279-6. 3.3 gas leakage rate Li Li: the propor
37、tion expressed as a percentage by volume of gas i leaking from a gas-filled unit per year calculated by the following formula: P P T T Vc m L o oioi i i = ,int 6 10 6 , 87 in %a-1(1) where the meaning of the symbols is given in Table 1 EN 1279-3:2002 (E) 7 Table 1 Meaning and units of the symbols us
38、ed in equation (1) Units SymbolDescription SI system for practical use in equation (1) cigas concentration determined according to 5.4.4volume fraction in percentage mimass of gas that has leaked from a gas-filled unit in a given time, and determined according to 5.4.3 kg/hg/h o,idensity of gas i at
39、 temperature To and pressure Pokg/mg/mm Pabsolute atmospheric pressure at which the unit was sealed Pasame unit as Po Poatmospheric pressure at which o was determinedPae.g. hPa Ttemperature at which unit was sealedKK Totemperature at which o was determinedKK Vintinternal volume of the test specimen
40、according to 5.4.1 mmm aone year NOTE o,i is often given at To = 273 K (0 C) and Po = 1014 hPa 3.4 Up U-value (see EN 673) for publication: the thermal transmittance value to be published, normally determined with the gas concentration ci,o. See also annex A 3.5 Rw,p(C/Ctr) Rw(C/Ctr)-value (see prEN
41、 12758) for publication: the weighted sound reduction index to be published, normally determined with the gas concentration ci,o. See also annex A EN 1279-3:2002 (E) 8 4 Requirements 4.1 Gas leakage rate The gas leakage rate, Li, for gases with concentrations higher than 15 %, and also for air, meas
42、ured as described in clause 5 shall be Li 1,00 in % a-1(2) NOTEFor most insulating glass units, measured Li values are much higher than actual Li values will be after 10 years natural ageing. Therefore the limiting value should not be used for calculating the gas concentration during the lifetime of
43、 the unit. See annex B. In the case of sealants based on polysulfide, polyurethane, silicone or polyisobutylene, determining the gas leakage rate of argon (Ar) may replace the measurement of the gas leakage rate for sulfurhexafluoride (SF6) and air. 4.2 Tolerances on gas concentration For tolerances
44、 on gas concentration, refer to EN 1279-6. 4.3 Dew point and moisture penetration index For testing and requirements on dew point and moisture penetration, refer to EN 1279-2. 4.4 Edge seal strength For the requirements on edge seal strength, refer to EN 1279-4. 4.5 Additional requirements for other
45、 gases than argon, sulfurhexafluoride and air For those requirements, refer to annex A. 5 Testing 5.1 Principle of testing In the test, the gas leakage rate at 20 C is measured after subjecting the test specimen to a climate as specified in EN 1279-2 with the following modifications: the number of c
46、ycles is reduced to 28; and the time at a constant temperature of 58 C is reduced to 4 weeks. For measuring the gas leakage rate, the unit is placed in a gastight container and, after a given time, the amount of gas which has leaked from the unit is measured. After this measurement, the gas concentr
47、ation in the unit is analysed and the gas leakage rate calculated. 5.2 Apparatus 5.2.1 Climate exposure equipment Test apparatus for the climate exposure as specified in EN 1279-2. EN 1279-3:2002 (E) 9 5.2.2 Container for gas leakage rate measurement A controlled temperature container shall be used
48、for measuring the gas leakage rate, which shall be hermetically sealable, and capable of receiving the unit to be tested while inducing as little stress as possible, so that the residual volume in the container is as small as possible while the sealed edge zones of the unit are exposed to the circul
49、ation of purging gas. The quantity of ambient air penetrating into the container from outside, or the quantity of each constituent leaking from the container, shall be measured in a blank test using a solid glass body of approximately the same dimensions as the test specimens. The container shall be deemed to have an adequate degree of tightness if the measured quantity of gas during the measurement does not exceed 10 % of the ma