© ISO 2017 Glass in building — Basic soda lime silicate glass products — Part 2 Float glass Verre dans la construction — Verre de silicate sodocalcique — Partie 2 Glace INTERNATIONAL STANDARD ISO 1629[.]
INTERNATIONAL STANDARD ISO 16293-2 First edition 2017-03 Glass in building — Basic soda lime silicate glass products — Part 2: Float glass Verre dans la construction — Verre de silicate sodocalcique — Partie 2: Glace Reference number ISO 16293-2:2017(E) © ISO 2017 ISO 16293-2:2017(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2017, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2017 – All rights reserved ISO 62 93 -2 : 01 7(E) Page Contents iv Scope Normative references Terms and definitions Dimensional requirements 4.1 Thickness 4.1.1 General 4.1.2 Tolerances 4.2 Length, width and squareness 4.2.1 Jumbo and split sizes Quality requirements 5.1 General 5.2 Methods of observation and measurement 5.2.1 Optical faults 5.2.2 Visual faults f f 5.3 Acceptance levels 5.3.1 Optical faults 5.3.2 Spot faults 5.3.3 Linear/extended faults f f Designation Annex A (informative) Method for measuring the halo size of spot fault Bibliography Foreword S up p lied and final cut s izes E dge de ects o r final cut s izes E dge de ects o r final cut s izes © ISO 2017 – All rights reserved iii ISO 16293-2:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the voluntary nature o f standards, the meaning o f ISO specific terms and expressions related to formity assessment, as well as in formation about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso org/iso/foreword html The committee responsible for this document is ISO/TC 160, Glass in building, Subcommittee SC 1, Product considerations A list of all parts in the ISO 16293 series can be found on the ISO website iv © ISO 2017 – All rights reserved INTERNATIONAL STANDARD ISO 16293-2:2017(E) Glass in building — Basic soda lime silicate glass products — Part 2: Float glass Scope T h i s c u ment s p e ci fie s d i men s iona l a nd m i n i mu m qua l ity re qu i rements (i n re s p e c t o f op tic a l a nd vi s ua l fau lts) for flo at glas s for u s e i n bu i ld i ng , a s defi ne d i n I S O 162 -1 T h i s c ument appl ie s to flo at gla s s s uppl ie d i n s to ck s i ze s a nd fi na l c ut s i z e s Normative references There are no normative references in this document Terms and definitions ISO 16293-1 f ISO and IEC maintain terminological 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/obp For the purpo ses o f thi s cument, the terms and defi nitions given i n and the ol lowi ng apply 3.1 length H dimension of the straight edge of the glass parallel to the direction of draw of the glass ribbon N o te to entr y: S e e Figure l B [S OU RC E : I S O 114 -1 : 011 , , mo d i fie d] H Key l H B direction of draw length width Figure — Relationship between length, width and direction of draw © ISO 2017 – All rights reserved ISO 62 -2 : 01 7(E) 3.2 width B dimension of the edge of the glass perpendicular to the direction of the glass ribbon N o te to entr y: S e e Figure 3.3 stock sizes glass sizes that are intended to be re-cut to obtain final cut sizes (3.7) N o te to entr y: S to ck s i z e s c a n b e j u mb o s i z e s , s p l it s i z e s or s upp l ie d s i z e s j umbo sizes glass delivered in the following sizes: Nominal length H: 500 mm, 100 mm or 000 mm; Nominal width B: 210 mm N o te to entr y: T he u s u a l width i s 10 m m E xcep tion a l pro duc tion re qu i rements c a n c au s e th i s to b e re duce d , but the nominal width is never below 150 mm N o te to entr y: T he u s u a l m a xi mu m leng th i s 0 m m O vers i z e p l ate s where the nom i n a l len g th , than 000 mm, can be produced to special order H, is greater 3.5 split sizes glass delivered in the following size ranges: Nominal length H: 000 mm to 550 mm; Nominal width B: 210 mm N o te to entr y: T he u s u a l width i s 10 m m E xcep tion a l pro duc tion re qu i rements c a n c au s e th i s to b e re duce d , but the nominal width is never below 150 mm supplied size pane of glass that has been supplied as raw material for cutting down to a size for installation, delivered in the following size ranges: Nominal length H Nominal width B: 000 ±2 ±3 ±3 ±5 e t w e e n d i a g o n a ±3 ±4 ±4 ±5 l s f o r s u p p l i e d a n d f i n a l c u t s i z e s Dimensions in millimetres Limit on the difference between diagonals S u p p l i e d a n d f i n a l c u t s i z e s (H, B) ≤ 500 1500 < (H, B) ≤ 000 (H, B) > 000 5 6 Quality requirements 5.1 General One quality level is considered in this document This is determined by evaluation o f the optical and visual faults The manu facturer(s) should be consulted i f higher levels o f quality are required 5.2 Methods of observation and measurement 5.2.1 Optical faults A screen bearing an assembly o f black and white stripes (zebra) is observed through the glass to be examined The usual size of screen is between 500 mm × 150 mm and 500 mm × 000 mm It consists of a translucent white background with parallel black stripes, 25 mm wide and 25 mm apart, inclined at 45° The screen is uni formly lit from behind with white daylight fluorescent tubes The illuminance o f the screen measured m from it shall be between 400 lux and 200 lux The measurement shall be taken at a point on a line normal to the centre of the screen The walls of the test room should be painted with a dark non-reflective paint having a di ffuse reflection ≤0,10 The glass to be examined shall be held vertically in a support frame The centre o f the glass shall be at a distance of 4,5 m from the screen and on a line normal to the centre of the screen The glass shall be capable of being rotated around a vertical axis The glass shall be held with the direction of draw of the glass vertical Appropriate critical viewing angles, α, formed by the glass and the screen should be indicated (see Figure 2) The observer stands still at a distance of m from the centre of the screen on a line passing through the axis of rotation The glass being examined is rotated from an angle α = 90° until there is no longer any distortions of the lines on the screen The angle, α (see Figure 2), at which this occurred is noted © ISO 2017 – All rights reserved ISO 62 -2 : 01 7(E) For s to ck s i ze s , the gla s s s ample s a re ob tai ne d by s pl itti ng the fu l l width o f the p ane i nto pie ce s with a width, B, of about 800 mm, and a length, H, between 300 mm and 500 mm The distortion is measured f f in the areas D and d as shown in Figure f Figure T he d i s tor tion o the fi na l c ut s i z e s s l l u s e the data o s to ck s i z e s H owever, when the data e s no t e xi s t, the s ample s l l b e eva luate d b y the me tho d o B C A Key A screen B glass sample C observer d D B d Figure — Plan view showing set up of zebra tes t Key B d D width (ap p roximately 0 mm) measurement zone measurement zone Figure — Zones for the measurement of optical distortion 2 2 Visual faults Spot faults Conditions of observation of spot faults are described in Annex A The categories of spot faults are defi ne d b y the ma xi mu m d i men s ion (d i ame ter or leng th) o f the h a lo or o f the nucleu s The nucleus dimensions are measured with a micrometre with graduations in tenths of a millimetre, Annex A Note the number of spot faults and the biggest dimension of the halo or of the nucleus and relate to the four categories of spot faults as shown in Table and the h a lo d i men s ion i s me a s ure d accord i ng to the me tho d defi ne d i n © ISO 2017 – All rights reserved ISO 62 93 -2 : 01 7(E) Table — C ategories of spot faults Nucleus dimension H alo dimension ≤1,0 mm >1,0 mm and ≤2,0 mm >2,0 mm and ≤3,0 mm ≤3,0 mm >3,0 mm and ≤6,0 mm >6,0 mm and ≤9,0 mm >3,0 mm >9,0 mm NOTE In some circumstances, i f not possible to measure the halo, then only the nucleus size has to be 2 Linear/extended faults measured The glass pane to be examined is illuminated in conditions approximating to di ffuse daylight and is observed in front o f a matt black screen (reflection coe fficient between 0,2 and 0,4) Place the pane o f glass to be examined vertically in front o f the screen and parallel to it Arrange the point of observation m from the glass, keeping the direction of observation normal to the glass surface View the pane o f glass, and note the presence o f visually disturbing faults 5.2.3 Edge de fects for final cut sizes Entrant and emergent faults h₂ h₁ These faults are shown in Figures and The dimensions h1 , h and p and the glass thickness, e, are measured h₁ h₁ Figure — Entrant and emergent faults (surface view) p e Figure — Entrant faults (edge view) © ISO 2017 – All rights reserved ISO 62 -2 : 01 7(E) Bevel d d This fault is shown in Figure The dimension, d, and the glass thickness, e, are measured e e Figure — Bevel (edge view) Acceptance levels Optical faults When viewed under the conditions of observation as described in 5.2.1 no disturbing distortion shall be not less than the appropriate critical viewing angle given in Table , the a ngle, α, at wh ich there i s Table — Critical viewing angles Nominal thickness Angle in mm , α, 1,9, 2, 2,5, 2,7 , D, Angle , d 40 45 50 ≥4 in zone in degrees , α, in zone , in degrees 40 40 45 Spot faults The allowable numbers for each of the categories of faults (see Table f are shown in Table 7, using the nucleus or the halo dimension as acceptance criteria ) T a b l e — A l l o w a b l e n u m b e r s o ff a Nucleus dimension H alo dimension ≤1 ,0 mm ≤3 ,0 mm >1 , m m a nd ≤ , m m >3 , m m a nd ≤ , m m >2 , m m a nd ≤ , m m > , m m a nd ≤ 9, m m >3,0 mm 3 3 >9,0 mm u l t s f o r s t o c k s i z e s or s to ck s i z e s and fi na l c ut s i z e s a n d f i n a l c u t s i z e s (max per m ) Stock si ze Final cut s i ze a ny nu mb er a ny nu mb er 1,32/m2 0,66/m 0,5/m (max per m ) 1,32/m 0,66/m 0/m Linear/extended faults Jumbo and split sizes 5.2.2.2, the allowable number of faults is an average of 0,05 faults in 20 m2 of glass, related to at least 20 tonnes When exa m i ne d b y the me tho d i n 3 Supplied sizes When e xa m i ne d b y the me tho d i n per 20m 5.2.2.2, the allowable number of faults is an average of 0,05 faults © ISO 2017 – All rights reserved ISO 62 93 -2 : 01 7(E) 5.3.3.3 Linear/extended faults for final cut sizes When exa m i ne d b y the me tho d i n 5.3.4 5.2.2.2, no linear/extended faults are allowed Edge de fects for final cut sizes The limitations on entrant and emergent faults and bevel are given in Table Table — Limitations on edge defects Edge defect Limitations < e mm P < (e/2) mm h < e mm, but shall not exceed 10 mm The ratio (d/e) shall be less than 0,5, but d shall not exceed 10 mm h1 Entrant fault Emergent fault Bevel T he l i m i tatio n s only ap p l y when the re is no r i s k o f b re a kage re s u lti n g fro m ther m a l s tre s s In ap p l ic atio n s whe re the r m a l s tre s s b re a kage m ay ap p l y, the m a nu fac tu rer s ’ re co m me nd atio n s o n e dge qu a l i t y s ho u ld b e fo l lo we d Designation F lo at gla s s i n compl ia nce with th i s c ument s l l b e de s ignate d, re s p e c tively, b y the — the typ e; — — — — a reference to this document, i.e ISO 16293-2; the tint (manufacturer’s reference) or clear; the nominal thickness in mm; the nominal length, H, and width, B, in mm; fol lowi ng: EXAMPLE Float glass clear, intended for use in buildings, thickness mm, length 6,00 m, width 3,21 m, is designated as follows: Float glass - ISO 16293-2 - clear mm, 000 mm ì 210 mm â ISO 2017 – All rights reserved ISO 62 -2 : 01 7(E) Annex A (informative) Method for measuring the halo size of spot fault A.1 Conditions of observation The method for measuring spot fault size including halo is based on the projection technique, using a point source projector and a screen (see Figure A.1) A projector with a Mercury Vapour Short-Arc Lamp o f 200 Watts is placed at 4,65 m +/− 0,10 m from the projection screen NOTE Any other method that is better or equivalent may be used NOTE Equipment “OSRAM HBO 200 Watts lamp” has been found to be suitable1) The glass or sample containing the spot fault is placed at 0,60 m +/− 0,10 m o f a projection screen, in the light beam o f the projector The sample is maintained parallel to the screen The spot fault image (nucleus and deformation) appears on the screen Dimensions in metres Key screen point source projector glass sample with spot fault distortion gauge Figure A.1 — Method of observation of the sample 1) OSRAM HBO 200 W ® is the trade name o f a product supplied by OSRAM in Mercurius straat 28, B-1930 Nossegem or in Steineme Furt, D-86167 Augsburg This information is given for the convenience of users of this standard and does not constitute an endorsement by ISO o f the product named Equivalent products may be used i f they are shown to lead to the same results 10 © ISO 2017 – All rights reserved ISO 62 93 -2 : 01 7(E) A.2 Measurement of the size of the spot fault including the halo Place on the surface of the glass (where the spot fault is located) a distortion gauge (plastic transparent sheet on which circular black spots with different diameters from 0,6 mm to 9,0 mm are reproduced (see Figure A.2) Search the circular spot covering the spot fault which conduct to the elimination of the spot fault image on the screen 0,6 9,0 0,8 1,0 8,0 1,5 2,0 7,0 2,5 3,0 6,0 5,0 3,5 4,0 Figure A — E xample of dis tortion gauge with printed black spots The spot fault size including halo is the diameter of this circular black spot NO TE Fo r mo re acc u rac y, a c a l l ip er co u ld b e u s e d i n s te ad o f the p l a s tic d i s tor tion gauge © ISO 2017 – All rights reserved 11 ISO 62 -2 : 01 7(E) Bibliography [1] 12 Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general physical and mechanical properties ISO 62 -1 , © ISO 2017 – All rights reserved ISO 62 93 -2 : 01 7(E) ICS 81.040.20 Price based on 12 pages © ISO 2017 – All rights reserved