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1、BRITISH STANDARD BS EN 572-2:1995 Glass in building Basic soda lime silicate glass products Part 2: Float glass The European Standard EN 572-2:1994 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 57
2、2-2:1995 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Board (B/-), was published under the authority of the Standards Board and comes into effect on 15 March 1995 BSI 03-1999 The following BSI references relate to the work on this stand
3、ard: Committee reference B/520/1 Draft for comment 91/18122 DC ISBN 0 580 23618 8 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austri
4、aOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standard FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institu
5、te of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de N
6、ormalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006,
7、Uncontrolled Copy, (c) BSI BS EN 572-2:1995 BSI 03-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 572-23 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referenceInside back cover
8、Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 572-2:1995 ii BSI 03-1999 National foreword This Part of BS EN 572 has been prepared by Subcommittee B/520/1 and is the English language version of EN 572-2, Glass in building Basic soda
9、lime silicate glass products Part 2: Float glass published by the European Committee for Standardization (CEN). It does not replace any current British Standard. EN 572-2 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does no
10、t purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside f
11、ront cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffi
12、eldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 572-2 November 1994 ICS 81.040.20 Descriptors: Construction, glass, glassware, plate glass, dimensions, dimensional tolerances, appearance, defects, quality, acceptability,
13、designation English version Glass in building Basic soda lime silicate glass products Part 2: Float glass Verre dans la construction Produits de base: verre de silicate sodo-calcique Partie 2: Glace Glas im Bauwesen Basiserzeugnisse aus Kalk-Natronglas Teil 2: Floatglas This European Standard was ap
14、proved by CEN on 1994-11-08. 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 bibliographical references concerning such national s
15、tandards may be obtained on application to the Central Secretariat 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 member into its own language and notified
16、 to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. C
17、EN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 572-2:1994 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2
18、006, Uncontrolled Copy, (c) BSI EN 572-2:1994 BSI 03-1999 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 129, Glass in building, the Secretariat of which is held by IBN. CEN/TC 129/WG1, Basic glass products, prepared a working draft based on the document ISO/TC
19、 160 N56 Glass in buildings Basic product Part 2: Plate and float glass. 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 May 1995, and conflicting national standards shall be withdrawn at the late
20、st by May 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, Unite
21、d Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 3.1Length, H, and width, B3 3.2Jumbo sizes3 3.3Split sizes3 3.4Optical faults3 3.5Visual faults3 3.6Spot faults3 3.7Linear/extended faults3 4Dimensional requirements3 4.1Thickness3 4.2Length, width and squareness4 5Quali
22、ty requirements4 5.1Methods of observation and measurement4 5.2Acceptance levels5 6Designation6 Figure 1 Relationship between length, width and direction of draw3 Figure 2 Determination of length, width and squareness4 Figure 3 Plan view showing set up of zebra test5 Figure 4 Zones for the measureme
23、nt of optical distortion6 Table 1 Tolerances on nominal thickness4 Table 2 Categories of spot faults5 Table 3 Critical viewing angles5 Table 4 Acceptance levels for spot faults in jumbo sizes6 Table 5 Acceptance levels for spot faults in split sizes6 Licensed Copy: sheffieldun sheffieldun, na, Mon N
24、ov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-2:1994 BSI 03-19993 1 Scope This Part of this European Standard specifies dimensional and minimum quality requirements (in respect of optical and visual faults) for float glass, as defined in EN 572-1, for use in building. This Part of
25、 this standard applies only to float glass supplied in jumbo sizes (see note 1) and split sizes (see note 2). NOTE 1Jumbo sizes PLF (plateau largeur de fabrication) Bandmasse. NOTE 2Split sizes DLF (dimension largeur de fabrication) Geteilte Bandmasse. This Part of this standard does not apply to gl
26、ass in cut sizes for final end use. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated reference
27、s, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 572-1, Glass in building Basic soda lime silicate glass pr
28、oducts Part 1: Definitions and general physical and mechanical properties. 3 Definitions For the purposes of this standard the following definitions apply. 3.1 length, H, and width, B these are defined with reference to the direction of draw of the float glass ribbon as shown in Figure 1 3.2 jumbo s
29、izes glass delivered in the following sizes: Nominal length H: 4 500 mm, 5 100 mm or 6 000 mm Nominal width B: 3 210 mm NOTEThe usual width is 3 210 mm. Exceptional production requirements may cause this to be reduced but the nominal width is never below 3 150 mm. 3.3 split sizes glass delivered in
30、the following size ranges: Nominal length H: 1 000 mm to 2 550 mm Nominal width B: 3 210 mm NOTEThe usual width is 3 210 mm. Exceptional production requirements may cause this to be reduced but the nominal width is never below 3 150 mm. 3.4 optical faults these are faults which lead to distortions i
31、n the appearance of objects observed through the glass 3.5 visual faults these are faults which alter the visual quality of the glass. They are spot faults and linear/extended faults 3.6 spot fault a spot fault is a nucleus which is sometimes accompanied by a halo of distorted glass. The dimension o
32、f a spot fault comprising a nucleus with a halo is obtained by multiplying the dimension of the nucleus by a factor of approximately 3 3.7 linear/extended faults these faults can be on or in the glass, in the form of deposits, marks or scratches which occupy an extended length or area 4 Dimensional
33、requirements 4.1 Thickness The actual thickness shall be the average of four measurements, taken to the nearest 0,01 mm, one taken at the centre of each side. Measurement shall be by means of an instrument of the caliper micrometer type. 4.1.1 Tolerances The actual thickness, rounded to the nearest
34、0,1 mm shall not vary from the nominal thickness by more than the tolerances shown in Table 1. Figure 1 Relationship between length, width and direction of draw Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-2:1994 4 BSI 03-1999 Tabl
35、e 1 Tolerances on nominal thickness 4.2 Length, width and squareness The nominal dimensions for length, H, and width, B, being given, the pane shall not be larger than a prescribed rectangle resulting from the nominal dimensions increased by the permissible plus tolerance or smaller than a prescribe
36、d rectangle reduced by the permissible minus tolerance. The sides of the prescribed rectangles shall be parallel to one another and these rectangles shall have a common centre (see Figure 2). The limits of squareness shall also be prescribed by these rectangles. 4.2.1 Tolerances The tolerances on no
37、minal dimensions length, H, and width, B, are 5 mm. 5 Quality requirements One quality level is considered in this standard. This is determined by evaluation of the optical and visual faults. NOTEThe manufacturer(s) should be consulted if higher levels of quality are required. 5.1 Methods of observa
38、tion and measurement 5.1.1 Optical faults A screen bearing an assembly of black and white stripes (zebra) is observed through the glass to be examined. The usual size of screen is between 1 500 mm 1 150 mm and 2 500 mm 2 000 mm. It consists of a translucent white background with parallel black strip
39、es, 25 mm wide and 25 mm apart, inclined at 45. The screen is uniformly lit from behind with white day-light fluorescent tubes. The luminance of the screen, measured 1 m from it, should be between 400 lux and 1 200 lux. The walls of the test room should be painted with a dark non-reflective paint ha
40、ving a diffuse reflection # 0,10. The glass to be examined should be held vertically in a support capable of being rotated around a vertical axis, situated 4,5 m from the screen and on a line normal to the centre of the screen. The glass shall be held with the direction of draw of the glass vertical
41、. Marks for the critical viewing angle, a, formed by the glass and the screen should be indicated (see Figure 3). The observer stands still at a distance of 9 m from the centre of the screen on a line passing through the axis of rotation. Nominal thickness (mm)Tolerances (mm) 2 3 4 5 6 8 10 12 15 19
42、 25 0,2 0,2 0,2 0,2 0,2 0,3 0,3 0,3 0,5 1,0 1,0 Figure 2 Determination of length, width and squareness Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-2:1994 BSI 03-19995 The glass being examined is rotated from an angle a = 90 until
43、there is no longer any distortions of the lines on the screen. The angle, a (see Figure 3), at which this occurred is noted. The glass sample taken, with a length, H, between 300 mm and 500 mm and a width, B, of 3 210 mm, is split into four. This gives samples of width approximately 800 mm. The dist
44、ortion is measured in the areas D and d as shown in Figure 4. 5.1.2 Visual faults 5.1.2.1 Spot faults Measure the largest dimension (diameter or length) of these faults with a micrometer with graduations in tenths of a millimetre. Note the number and dimensions of the spot faults and relate to the f
45、our categories of spot faults as shown in Table 2. Table 2 Categories of spot faults 5.1.2.2 Linear/extended faults The glass pane to be examined is illuminated in conditions approximating to diffuse daylight and is observed in front of a matt black screen. Place the pane of glass to be examined ver
46、tically in front of the screen and parallel to it. Arrange the point of observation 2 m from the glass, keeping the direction of observation normal to the glass surface. View the pane of glass, and note the presence of visually disturbing faults. 5.2 Acceptance levels 5.2.1 Optical faults When viewe
47、d under the conditions of observation as described in 5.1.1 the angle a, at which there is no disturbing distortion shall be not less than the appropriate critical viewing angle given in Table 3. Table 3 Critical viewing angles CategoryDimension of nuclei of spot faults (mm) A B C D 0,2 and # 0,5 0,
48、5 and # 1,0 1,0 and # 3,0 3,0 Nominal glass thickness Angle a in zone DAngle a in zone d mmdegreesdegrees 2 3 45 50 40 45 Figure 3 Plan view showing set up of zebra test Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-2:1994 6 BSI 03-
49、1999 5.2.2 Spot faults 5.2.2.1 Jumbo sizes The allowable numbers of the categories of faults (see Table 2) are shown in Table 4. Table 4 Acceptance levels for spot faults in jumbo sizes 5.2.2.2 Split sizes The allowable numbers of the categories of faults (see Table 2) are shown in Table 5. Table 5 Acceptance levels for spot faults in split sizes 5.2.3 Linear/extended faults The allowable number of faults is an average 0,05 faults in 20 m2 of glass, related to at lea