CAN CGSB-12 2-M91-1991 Flat clear sheet glass.pdf

1、CGSB CAN/CGSB- L2.2-tlqL * 1874650 0001124 574 m NATIONAL STANDARD OF CANADA C AN/CGSB- 12.2-M9 1 Supersedes CAN/CGSB- 12.2-M76 Flat, Clear Sheet Glass Canadian General Standards Board CGSB CAN/CGSB- L2-2-HqL * m LB74b50 0001L25 420 m The CANADIAN GENERAL STANDARDS BOARD (CGSB). under whose auspices

2、 this standard has been developed is a government agency within the Federal Department of Supply and Services. CGSB 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 c

3、omposed of representatives of relevant interests including producers, consumers and other users. retailers, governments, educational institutions, technical. professional and hade societies, and research and testing organizations. Any given standard is developed on the consensus of views expressed b

4、y such representatives. The Ministers Advisory Council on CGSB reviews the results of the consensus process. CGSB has been accredied by the Standards Council of Canada as a national standards-writing organization. The standards that it develops and offers as National Standards of Canada conform to t

5、he criteria and procedures established for this piapose by the Standards Council of Canada In addition to standards it publishes as national standards, CGSB produces standards to meet particular needs, in response to requests from a variety of sources in both the public and private sectors. Both CGS

6、B standards and national standards developed by CGSB are developed in conformance with the policies described in the Policy Manual for the Development and Maintenance of Standards by CGSB. CGSB standards are subject to review and revision at any time, so as to ensure that they keep abreast of techno

7、logical progress. Suggestions for their improvement, which are always welcome, should be brought to the notice of the standards committees concerned. Changes to standards are issued either as separate amendment sheets or in new editions of standards. An up-todate listing of CGSB standards, including

8、 details on latest issues and amendments, and ordering instructions, will be found in the CGSB Catalogue, which is published annually and is available without charge upon request. Although the intended primary application of this standard is stated in its Scope, it is important to note that it remai

9、ns the responsibility of the users of the standard to judge its suitability for their particular purpose. Many tests required by CGSB standards are inherently hazardous. CGSB neither assumes nor accepts any responsibility for any injury or damage that may occur during or as the result of tests, wher

10、ever performed. CGSB takes no position respecting the validity of any patent rights asserted with any item connected with this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights are mtirely their own responsibility. Further information

11、 on CGSB and its services and standards may be obtained from: The Secreary Canadian General Standards Board Ottawa, canada KIA 1G6 The STANDARDS COUNCIL OF CANADA is the coordiiating body of the National Standards System, a federation of independent, autonomous organizations working towards the furt

12、her development and improvement of voluntary standardion in he national interest. The principai objectives of the Council are to foster and promote voluntary standardization as a means of advancing the national economy, benefiting the health, safety and welfare of the public. assisting and protectin

13、g the consumer, facilitating domestic and international trade, and furthering international co-operation in the fieid of standards. A National Standard of Canada is a standard which has been approved by the Standads Council of Canada and one which reflects a reasonable agreement among he views of a

14、number of capable individuals whose collective interests provide, to the greatest practicable extent, a balance of representation of producers, users, consumers and others with relevant interests, as may be apppriate to the subject in hand. It normally is a standard that is capable of making a signi

15、ficant and timely contribution to the national interest Approval of a standard as a National Standard of Canada indicates that a standard conforms to the criteria and pocedure established by the Standards Council of Canada. Approval does not refer to the technical content of the standard; this remai

16、ns the continuing responsibility of the accredited standards-writing organization. Those who have a need to apply standards are encouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the latest edi

17、tion from the organization preparing the standard. The responsibility for approving National Standards of Canada rests with the: Standards council of Canada 350 Sparks Street Ottawa. Ontario K1P 6N7 Tow to order -3 Publications: by Teiephone - (819) 956-0425 OT - (819) 956-0426 by Fax - (819) 956-56

18、44 by Mail - CGSB, Sales Unit Ottawa, Canada K1A 1% 11 Laurier Street Hull, Quebec in Person - Place du Portage III, 9C1 ! CGSB CAN/CGSB- L2.2-ML XX m L874b50 OOOLL2b 367 m NATIONAL STANDARD OF CANADA CAN/CGSB-12.2-M91 Supersedes CANKGSB- 12.2-M76 FLAT, CLEAR SHEET GLASS Prepared by the Canadian Gen

19、eral Standards Board es Standards Council of Canada 0 Approved by the Published April 1991 by the Canadian General Standards Board Ottawa, Canada K1A 1G6 Minister of Supply and Services Canada - 1991 No part of this publication may be reproduced in any form without the prior permission of the publis

20、her. Miliey, B. Chairman hbruster, G. Auger, J.P. Bailey, D.W. Clarke, D. Cole, Ms. B. Franche, G. Hmsworth, L.G. Hawiey, R. Jones, S. Kenny, T. MacDonald, A. Prohaska, D.T. Seeseman, H. Sheehan, K.P. Smith, WJ. Werthwein, P.S. Zdanowicz, A. Ziobroski, J. Khan, R.A. Secretary CANADIAN GENERAL STANDA

21、RDS BOARD COMMITTEE ON GLASS (Membership at date of approval) Indalglass International Plasti-Glass Hyalin International Inc. ORTECH International Duplate Canada Inc. Department of Consumer and Corporate Affairs Canada Mortgage and Housing Corporation Department of Labour, Saskatchewan Department of

22、 Public Works Dashwood Industries Ltd. Lamilite Ltd. MacDonald Mirror Inc. PPG Industries Canada Inc. 3M Canada Inc. Department of Transport Ministry of Municipal Affairs, British Columbia AFG Glass Inc. Ministry of Housing, Ontario Warnock Hersey Professional Services Ltd. Canadian General Standard

23、s Board O Achowledgment is made for the French fronslotion of this National Sandard of Canada by the Transldion Bureau of the Departmenl of the Secretary of State. CGSB CAN/CGSB- 12-2-M9L * 1874b50 0001128 13T CAN/CGSB-12.2-M91 Supersedes CAN/CGSB-12.2-M76 CANADIAN GENERAL STANDARDS BOARD FLAT, CLEA

24、R SHEET GLASS 1. SCOPE 1.1 This standard applies to flat, transparent, clear sheet glass having glossy, fire-finish&, apparently plane and smooth surfaces, but having a characteristic waviness of surface, for glazing, mirrors and other uses. 1.2 The testing and evaluation of a product against this s

25、tandard 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 responsibility to consult the appropriate authorities and to establish appropriate health an

26、d safety practices in conjunction with any existing applicable regulatory requirements prior to its use. 2. APPLICABLE PUBLICATIONS 2.1 The following publications are applicable to this standard: 2.1.1 Canadian General Standards Board (CGSB) CAN/CGSB-12.3-M - Fht, Clm Float Glass CAN/CGSB-12.4-M - H

27、eat Absorbing Glass. 2.1.2 National Research Council of Canada National Building Code of Canada. 2.1.3 ASTM C 162 - Definitions of Terms Relating to Glass and Glass Products. Reference to the above publications is to the latest issues unless otherwise specified by the authority applying this standar

28、d. The source for these publications are shown in the Notes section. 2.2 3. TERMINOLOGY 3.1 Central Area of Sheet - The central area is considered as being a circle having a diameter equal to half the width of the light or an ellipse having one diameter equal to half the length of the sheet and the

29、other diameter equal to half the width of the light. 3.2 Defects in Glass Crush - A lightly pitted area resulting in a dull grey appearance over the region. Digs - Deep, short scratches. Dirt - A small particle of foreign matter imbedded in the glass surface. Gaseous Inclusions - Round or elongated

30、bubbles in the glass. Knot - A transparent area of incompletely assimilated glass having an irregular knotty or tangled appearance. Lines - Fine cords or strings, usually on the surface of sheet glass. Waves that extend continuously across the sheet, so that the reflection from the surface appears a

31、s a line or series of lines extending either the full width or a considerable distance across the sheet. Open Gaseous Inclusions - Bubbles at the surface of glass that are open, leaving a cavity in the finished surface. Ream - Inclusions within the glass, or layers or strings of glass, that are not

32、homogeneous with the main body of the glass. i 1 CGSB,CAN/CGSB- 12.2-Mq1 ff 9 LB74650 0001129 076 9 Rubs - Abrasion of the glass surfaces producing a frosted appearance. A rub differs from a scratch in having appreciable width. Scratches - Any marking or tearing of the surface produced in manufactur

33、ing or handling, appearing as though it were done by a sharp or rough instrument. Stones - Any crystalline inclusion imbedded in the glass. Strings - Transparent lines appearing as though a thread of glass had been incorporated into the sheets. Wave - Defects resulting from irregularities of the sur

34、faces of glass making objects viewed at varying angles appear wavy or bent. Additional defmitions of terms relating to glass and glass products may be found in CAN/CGSB-12.3-M and ASTMC 162. 3.3. 4. CLASSIFICATION 4.1 The glass shall be supplied in the following qualities, as specified (par. 8.1): 4

35、.1.1 Qualities AA - Special Selected Quality A - Selected Quality B - Ordinary Quality. 5. DETAILED REQUIREMENTS 5.1 Dimensions - Clear sheet glass shall ,v supplied in ,.e dimensions specified dar. 8.1), within the tolerances for thickness, length and width stated in Table 1. Squareness - The comer

36、s of any rectangular piece of sheet glass shall not deviate from a right angle by an amount greater than that represented by 0.075 or 1.3 mm/m. Light Transmittance - Clear sheet glass shall have nominal percentages of light transmittance (within a tolerance of I5%) according to thickness as given in

37、 Table 1, when tested in accordance with the procedure stated in CAN/CGSB-12.4-M. 5.2 5.3 Nominal Thickness mm 2 3 4 5 6 8 10 12 15 19 Thickness Tolerance mm I 0.3 f 0.5 f 0.5 $1 0.5 I 0.5 f 0.8 I 1.0 I 1.0 f 1.0 f 1.0 TABLE 1 Length and Width Tolerance of Cut Sizes mm f 2.0 I 2.0 I 2.0 I 2.0 f 2.0

38、f 2.5 f 2.5 f 3.0 f 4.0 f 5.0 Light Transmittance Nominal % 90 90 90 89 88 87 87 85 85 82 5.4 Maximum Glass Sizes for Doors and Windows - Maximum glass sizes, according to thickness, for glazing doors or windows shall conform to the requirements of the National Building Code of Canada. 2 CGSB CANICG

39、SB- L2.2-ML * 9 187Llb50 OOOLL30 898 9 Defects - Defects shall not be greater than those listed in Table 2, when tested in accordance with par. 6.2. AA Quality Central (d) Outer (*) 5.5 A Quality B Quality Outer (d) Central (d) Outer (d) Centrai (4 TABLE 2 3.0 mm ) -i Medium ce) 119.0 mm ) I Crush D

40、igs Faint (b,c) Faint (b) Light (b.c) Light 1.5 mm 3.0 mm 6.5 mm 12.5 mm 1.5 mm ) 3.0 mm *) 6.5 mm *) 12.5 mm ) Wave, ream, and lines strings, not visible not visible 45“ (cl 450 (4 Defects Gaseous inclusions (0 0.5 mm 3.0 mm 12.5 mm 12.5 mm(“.d 19.0 mm cas) Open gaseous inclusions (0 None None 6.5

41、mm A 6.5 mm (b) Knots, dirt and stones None 1.0 mm ) 1.0 mm ) 1.5 mm ) 1.5 mm (b) Scratches and rubs Faint Light Light Medium Faint Medium +) 12.5 mm Medium (bsc) 19.0 mm 12.5 mm ) not visible 900 (c) Notes on Table 2 (a) Separated by at least 300 mm (b) Separated by at least 600 mm (c) Vision inter

42、ference angle (par. 62.3) (d) The central area is considered to form an oval or circle centred on the light whose axes or diameters do not exceed 50% of the overall dimension. The remaining area is consdered ihe outer area. (e) Intensity (scratches. rubs and crush) - When looking through glass and p

43、erpendicular to it, using daylight without direct sunlight or with background light suitable for observing each type of defect. the defects shall not be detectable at distances greater than the following (par. 622): Distance Intensity Faint Light Medium 200 mm IO00 mm 3000 mm (B Gaseous inclusions m

44、ay be round or elongated. For elongated inclusions maximum size specified shall be determined by adding the length (g) For defects of small size or of less intensity, the minimum separation shall be proportionately less. The larger of two defects shall govern the and width of the inclusion and divid

45、ing by two. (L + W)/2. separation. Defects not specifically mentioned shall be compared to the defect they most closely resemble. 6. 6.1 INSPECTION Sampling - Sampling of clear sheet glass for inspection shall be left to the discretion of the inspection authority, unless a specific sampling plan is

46、specified (par. 8.1). 6.2 6.2.1 Examination for Defects (par. 8.2) Gaseous inclusions, Knots, Dirt, Stones and Digs - Place sample in a vertical position approximately 1000 mm from the viewers position. The viewer shall look through the sample using either daylight without direct sunlight or a backg

47、round light suitable for observing each type of defect. Scratches, Rubs and Crush - Examine as in par. 6.2.1 except that distance of viewer from sample shall be as specified in Table 2 Note (e) for the applicable quality of glass sample. Wave, Ream, Strings and Lines - Place sample in a vertical pos

48、ition at a distance of approximately 1000 mm from a brick wall or similar background showing essentially straight parallel lines. The viewer shall look through the 6.2.2 CAN/CGSB-12.2-M91 3 7. 7.1 7.2 8. 8.1 8.2 8.3 8.4 8.4.1 8.4.2 8.4.3 sample from a distance of approximately loo0 mm, using either

49、daylight without direct sunlight or a background light suitable for observing each type of defect. View the sample at an angle to the surface of not less than the vision interference angle specified in Table 2 for the applicable glass. Line of vision shall be perpendicular to wall. Slight movement of the head horizontally through an angle of two or three degrees wiil make waves or lines more perceptible. PREPARATION FOR DELIVERY Labelling - When specified (par. 8.1) each individual piece of sheet glass shall bear a label, affixed by the manufacturer, giving the