ISO INTERNATIONAL STANDARD 12540 First edition 2017-03 Glass in building Tempered soda lime silicate safety glass Verre dans la construction - Verre silico-sodo-calcique de sécurité trempé Reference number IS012540:2017(E) International Organization for Standardization @ IS0 2017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI itted without license from IHS IS0 12540:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of 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 of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax+412274909 47 [email protected] www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST.OF STANDARDIZRoISQ s1.7 - All rights reserved I by IHS unde etworking permitted without license from IHS IS0 12540:2017(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope.. 2 Normative references 3 Terms and definitions 4 Glass products ..3 5 Fracture characteristics. .3 5.1 General .3 5.2 Accidental human impact .3 5.3 Fragmentation. .3 6 Dimensions and tolerances .4 6.1 Nominal thickness and thickness tolerances 6.2 Width and length (sizes) .4 6.2.1 General. ..4 6.2.2 Maximum and minimum sizes. .5 Tolerances and squareness 6.2.3 6.2.4 Edge deformation produced by vertical tempering .5 6.3 Flatness .6 6.3.1 General .6 6.3.2 Measurement of overall bow .8 6.3.3 Measurement of wave or roller wave distortion. 6.3.4 Measurement of edge lift (for horizontally tempered safety glass only) ..10 6.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process.. ..11 6.3.6 Measurement of local distortion (for vertically tempered safety glass only) ..12. 6.3.7 Limitation on overall bow, roller waves and edge lift for horizontally temperedsafetyglass .12 6.3.8 Limitation on overall bow, wave and perimeter deformation for tempered safety glass manufactured by air cushion process ..13 6.3.9 Limitation on overall bow and local distortion for vertically tempered safetyglass ..13 6.3.10 Other distortions ..14 7 Edge work, holes, notches and cut-outs ..14 7.1 General .14 7.2 Edge working of glass for tempering .14 7.3 Profiled edges. .15 7.4 Round holes 15 7.4.1 General. .15 7.4.2 Diameter of holes .15 7.4.3 Limitations on position of holes. .15 7.4.4 Tolerances on hole diameters. .17 7.4.5 Tolerances on position of holes. .17 7.5 Holes/others .18 7.6 Notches and cut-outs .18 7.7 Shaped panes .19 8 Fragmentation test. .19 8.1 General. .19 8.2 Dimensions and number of test specimens ..19 8.3 Test procedure.. .19 8.4 Assessment of fragmentation. .20 8.5 Minimum values from the particle count. .21 iii insee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vithoutlicense from IHS Not for Resale, 2017/5/16 00:43:13