1、CAN/CGSB-12.8-2017Supersedes CAN/CGSB-12.8-97National Standard of CanadaCanadian General Standards BoardInsulating glass unitsThe CANADIAN GENERAL STANDARDS BOARD (CGSB), under whose auspices this standard has been developed, is a government agency within Public Services and Procurement Canada. CGSB
2、 is engaged in the production of voluntary standards in a wide range of subject areas through the media of standards committees and the consensus process. The standards committees are composed of representatives of relevant interests including producers, consumers and other users, retailers, governm
3、ents, educational institutions, technical, professional and trade societies, and research and testing organizations. Any given standard is developed on the consensus of views expressed by such representatives.CGSB has been accredited by the Standards Council of Canada as a national standards-develop
4、ment organization. The standards that it develops and offers as National Standards of Canada conform to the criteria and procedures established for this purpose by the Standards Council of Canada. In addition to standards it publishes as National Standards of Canada, CGSB produces standards to meet
5、particular needs, in response to requests from a variety of sources in both the public and private sectors. Both CGSB standards and CGSB national standards are developed in conformance with the policies described in the CGSB Policy and Procedures Manual for the Development and Maintenance of Standar
6、ds.CGSB standards are subject to review and revision to ensure that they keep abreast of technological progress. CGSB will initiate the review of this standard within five years of the date of publication. Suggestions for their improvement, which are always welcome, should be brought to the notice o
7、f the standards committees concerned. Changes to standards are issued either as separate amendment sheets or in new editions of standards.An up-to-date listing of CGSB standards, including details on latest issues and amendments, and ordering instructions, is found in the CGSB Catalogue at our Web s
8、ite www.tpsgc-pwgsc.gc.ca/ongc-cgsb/index-eng.html along with more information about CGSB products and services.Although the intended primary application of this standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the standard to judge its suit
9、ability for their particular purpose.The testing and evaluation of a product against this standard may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this standard has the r
10、esponsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use. CGSB neither assumes nor accepts any responsibility for any injury or damage that may occur during or as the resu
11、lt of tests, wherever performed.Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patent rights. CGSB shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determina
12、tion of the validity of any such patent rights is entirely their own responsibility.LanguageIn this Standard, “shall” states a mandatory requirement, “should” expresses a recommendation and “may” is used to express an option or that which is permissible within the limits of this Standard. Notes acco
13、mpanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.Further info
14、rmation on CGSB and its services and standards may be obtained from:The Manager Standards Division Canadian General Standards Board Gatineau, Canada K1A 1G6A National Standard of Canada is a standard developed by an SCC- accredited Standards Development Organization (SDO), and approved by the Standa
15、rds Council of Canada (SCC), in accordance with SCCs: Requirements and Guidance-Accreditation for Standards Development Organizations, and Requirements and Guidance-Approval of National Standards of Canada Designation. More information on National Standard requirements can be found at www.scc.ca. An
16、 SCC-approved standard reflects the consensus of a number of experts whose collective interests provide, to the greatest practicable extent, a balance of representation of affected stakeholders. National Standards of Canada are intended to make a significant and timely contribution to the Canadian i
17、nterest. SCC is a Crown corporation within the portfolio of Industry Canada. With the goal of enhancing Canadas economic competitiveness and social well-being, SCC leads and facilitates the development and use of national and international standards. SCC also coordinates Canadian participation in st
18、andards development, and identifies strategies to advance Canadian standardization efforts. Accreditation services are provided by SCC to various customers, including product certifiers, testing laboratories, and standards development organizations. A list of SCC programs and accredited bodies is pu
19、blicly available at www.scc.ca. Users should always obtain the latest edition of a National Standard of Canada from the standards development organization responsible for its publication, as these documents are subject to periodic review.The responsibility for approving standards as NSCs rests with:
20、Standards Council of Canada 55 Metcalfe Street, Suite 600 Ottawa, Ontario K1P 6L5, CANADAby telephone 819-956-0425 or 1-800-665-2472by fax 819-956-5740by mail CGSB Sales Centre Gatineau, Canada K1A 1G6in person Place du Portage Phase III, 6B1 11 Laurier Street Gatineau, Quebecby email ncr.cgsb-ongct
21、psgc-pwgsc.gc.caon the Web www.tpsgc-pwgsc.gc.ca/ongc-cgsb/index-eng.htmlHow to order Publications:Published May 2017 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 HER MAJESTY THE QUEEN IN RIGHT OF CANADA, as represented by the Minister of Public Services and Procurement, the Mini
22、ster responsible for the Canadian General Standards Board (2017).No part of this publication may be reproduced in any form without the prior permission of the publisher.Insulating glass unitsCETTE NORME NATIONALE DU CANADA EST DISPONIBLE EN VERSIONS FRANAISE ET ANGLAISE.ICS 81.040.20NATIONAL STANDAR
23、D OF CANADA CAN/CGSB-12.8-2017Supersedes CAN/CGSB-12.8-97CAN/CGSB-12.8-2017 CGSB 2017 All rights reservedCANADIAN GENERAL STANDARDS BOARDCommittee on glass(Voting membership at date of approval)ChairWebb, M. Insulating Glass Manufacturers Alliance (Producer)General interest categoryFlack, J. Consult
24、antSteel, K. Steel Consulting ServicesZaremba, T. Roetzel then, calculate the deflections.CAN/CGSB-12.8-201717 CGSB 2017 All rights reservedAnnex B(normative)Test method for the determination of argon concentration10B.1 Introduction B.1.1 Argon, nitrogen and oxygen are physically separated by gas ch
25、romatography and compared to corresponding components separated under similar conditions from a reference standard mixture or mixtures of known similar composition. The composition of the sample is calculated from its chromatogram by comparing the area under the curve of each component with the area
26、 under the curve of the corresponding component on the reference standard chromatogram.B.2 ApparatusB.2.1 Gas chromatograph: consists of a gas sampling valve11 (100 to 250 uL capacity), and an adsorption column (Haysep DB12 or equivalent), a thermal conductivity detector (TCD) and an integrator. The
27、 apparatus shall separate argon, oxygen and nitrogen as indicated by the return of the recorded peak to the baseline between each successive peak. This is generally done at sub-ambient temperatures (e.g. -30C). The chromatograms shall be reproducible so that successive runs of a reference standard a
28、gree on each component peak area within 0.1%.B.3 Reagents and materialsB.3.1 A cylinder of Helium carrier gas, a cylinder of compressed air for valve actuation, a cylinder of liquid CO2with a dip tube for cooling the column oven, and a 10 mL gas tight syringe.B.3.2 Reference standard mixtures: are g
29、as mixtures that contain known percentages of argon, oxygen, and nitrogen that are required for calibration purposes. The concentrations of each component in the reference samples must encompass the expected concentration range of the corresponding component in the tested samples. The suitable stand
30、ard mixtures can be obtained with a certificate of analysis of each mixture, from reputable commercial supplier. The accuracy of the results depends upon the availability of accurate calibration standards.10This test method was developed by the National Research Council (NRC)-Institute for Research
31、in Construction (IRC) in co operation with the Insulating Glass Manufacturers of Canada (IGMAC).11The gas sampling valves offer a precise way of introducing the gas samples into the gas chromatograph.12The Haysep DB adsorption column can be purchased from Hayes Separations Inc., Highway 173 Five Mil
32、es S, Badera, TX 78003, U.S.A. Telephone (830) 796-4512.18CAN/CGSB-12.8-2017 CGSB 2017 All rights reservedB.4 Calibration and standardizationB.4.1 Apparatus preparationPrepare the gas chromatograph for use as directed by the manufacturer. The following operating conditions have been found to be sati
33、sfactory for this application however, any combination of conditions that result in a complete separation as indicated in the apparatus section is also satisfactory.Carrier gas Helium, 30 mL/min.Column Haysep DB,100 - 120 meshColumn size 30 ft by 1/8 in (nominal), stainless steelColumn (oven), tempe
34、rature -30CSampling loop temperature 100CDetector temperature 105CSample volume 250 uLB.4.2 Reference standard introduction and separation13: Fill the 10 mL gas-tight syringe14from the cylinder containing the reference standard. Remove the syringe from the cylinder outlet and evacuate the syringe to
35、 purge any contaminants that it may have contained; then refill the syringe with the reference standard gas. Close the syringe valve and remove it from the cylinder. Introduce the reference standard samples(s) into the gas chromatograph sampling port, as outlined in section B.5.B.5 Test procedureB.5
36、.1 Introduction and separation: Using the gas-tight syringe, insert the needle in the in-situ sampling (SantopreneTM 15) plug of the IG unit. Fill the syringe with the interspace gas then flush its contents back into the gas space. Repeat the flushing twice and fill the syringe barrel with a gas sam
37、ple by withdrawing the plunger (slowly) as far back as it can go. Close the syringe valve and carefully grip the needle at its base and pull it out of the gas space. Insert the needle into the gas sampling inlet and open the syringe valve. Inject the contents of the syringe into the column via a sep
38、tum connected at the inlet of the gas sampling valve and record the chromatogram16. Under the conditions listed above, the approximate elution times are nitrogen at 7.8 min, oxygen at 8.8 min and argon at 9.2 min.13The standardization is repeated daily or more often if chromatograph operating condit
39、ions are changed.14Although the volume of the gas sampling loop may be a few hundred microlitres or less, a sufficient volume of the reference sample gas is passed to ensure that all traces of the previous sample have been removed. Twenty times the volume of the valve and the connecting tubing are g
40、enerally considered adequate for this purpose.15Details of the availability, installation and use of the SantopreneTMplug may be obtained from the Insulating Glass Manufacturers Alliance (IGMA), 1500 Bank Street, Suite 300, Ottawa, ON K1H 1B8. Telephone (613) 233-1510. Fax (613) 482-9436.16For the p
41、roper operation of the gas chromatograph, and the correct procedure to obtain a chromatogram, refer to the operation manual of the gas chromatograph and the integrator.CAN/CGSB-12.8-201719 CGSB 2017 All rights reservedAnnex C(normative)Failure analysis for gas-filled IG units (Water immersion techni
42、que)C.1 ApparatusC.1.1 The test set-up consists of a see-through tank with minimum dimensions of 900 mm long x 500 mm wide x 300 mm high. It shall be capable of accommodating the standard IG unit size when it is placed horizontally in the tank. The tank shall be equipped with an electric immersion h
43、eater and a mixer to maintain a uniform temperature throughout the test.C.2 Test proceduresC.2.1 Heat the water in the water tank to 55 3C and maintain that condition during the test. Place the IG unit on two setting blocks at the bottom of the tank in such a manner that the glass sheets are fully i
44、mmersed and in a horizontal position at least 50 mm above the bottom. After a minimum of 5 min and a maximum of 10 min, observe any bubbles originating from any point around the perimeter of the IG unit and SantopreneTMplug, and record the position of leakage.20CAN/CGSB-12.8-2017 CGSB 2017 All right
45、s reservedAnnex D(informative)Users guideD.1 Durability of IG unit sealD.1.1 The standard CAN/CGSB-12.8 deals with the integrity and durability of the IG unit seal only without the influence of other building products, actual environmental condition, particular design of the glazing system or the sy
46、nergistic effects of the different elements present.D.1.2 A window or a curtain wall is a system consisting of many different components. For this system to perform well, it is appropriate to caution users of insulating glass units against the most common causes of seal failure.D.1.3 It is well-know
47、n in the industry that normal, well-made units using recognized materials will pass the requirements of the CAN/CGSB-12.8 tests without difficulty. However, the same units, if installed in a poorly designed glazing system, if not installed according to good industry practice or if incompatible mater
48、ials are used, may fail within a relatively short period of time. Below are mentioned the most common reasons for seal failure of well-made insulating glass units.D.2 Common causes for seal failure of IG unitsD.2.1 Water and high humidityAll glazing systems should be designed to keep the unit seals
49、as dry as possible and prevent extended periods of exposure to liquid water. If exposed to liquid water for extended periods of time, all sealed units will fail in a relatively short period of time. The length of time will vary depending on the environmental conditions and the type of sealing system used.The best defense against water is the use of systems that use the rain-screen principle with a well-drained glazing cavity (to the outside). On the room side there should be an effective vapour barrier to prevent warm moist room air from re
