1、BRITISH STANDARD BS EN 14321-1:2005 Glass in building Thermally toughened alkaline earth silicate safety glass Part 1: Definition and description The European Standard EN 14321-1:2005 has the status of a British Standard ICS 81.040.20 BS EN 14321-1:2005 This British Standard was published under the
2、authority of the Standards Policy and Strategy Committee on 11 July 2005 BSI 11 July 2005 ISBN 0 580 46363 X National foreword This British Standard is the official English language version of EN 14321-1:2005. The UK participation in its preparation was entrusted by Technical Committee B/520, Glass
3、and glazing in building, to Subcommittee B/520/1, Glass and glazing in building Basic and transformed glass products, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which im
4、plement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication
5、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/Euro
6、pean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pa
7、ges 2 to 26, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14321-1 June 2005 ICS 81.040.20 English
8、version Glass in building - Thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description Verre dans la construction - Verre de silicate alcalino- terreux de scurit tremp thermiquement - Partie 1 : Dfinition et description Glas im Bauwesen - Thermisch vorgespanntes Er
9、dalkali- Silicat-Einscheibensicherheitsglas - Teil 1: Definition und Beschreibung This European Standard was approved by CEN on 19 May 2005. 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 nati
10、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards 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 an
11、y other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finla
12、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR
13、NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14321-1:2005: EEN 14321-1:2005 (E) 2 Contents Page Foreword 4 Introduction5 1 Scope .6 2 Normative references .6 3
14、Terms and definitions.6 4 Glass products7 5 Fracture characteristics .7 6 Dimensions and tolerances7 6.1 Nominal thickness and thickness tolerances.7 6.2 Width and length (sizes).8 6.2.1 General 8 6.2.2 Maximum and minimum sizes9 6.2.3 Tolerances and squareness.9 6.2.4 Edge deformation produced by v
15、ertical toughening10 6.3 Flatness .11 6.3.1 General 11 6.3.2 Measurement of overall bow 11 6.3.3 Measurement of local bow .13 6.3.4 Limitation on overall and local bow.13 7 Edge work, holes, notches and cut-outs.14 7.1 Warning .14 7.2 Edge working of glass before toughening14 7.3 Profiled edges .15
16、7.4 Round holes 15 7.4.1 General 15 7.4.2 Diameter of holes15 7.4.3 Limitations on position of holes 15 7.4.4 Tolerances on hole diameters17 7.4.5 Tolerances on position of holes 17 7.5 Notches and cut-outs .18 7.6 Shaped panes18 8 Fragmentation test19 8.1 General 19 8.2 Dimensions and number of tes
17、t specimens .19 8.3 Test procedure 19 8.4 Assessment of fragmentation20 8.5 Minimum values from the particle count.20 8.6 Selection of the longest particle 21 8.7 Maximum length of longest particle 21 9 Other physical characteristics .21 9.1 Optical distortion 21 9.1.1 Thermally toughened alkaline e
18、arth silicate safety glass produced by vertical toughening21 9.1.2 Thermally toughened alkaline earth silicate safety glass produced by horizontal toughening 21 9.2 Anisotropy (iridescence) 21 9.3 Thermal durability.21 9.4 Mechanical strength .22EN 14321-1:2005 (E) 3 9.5 Classification of performanc
19、e under accidental human impact22 10 Marking22 Annex A (informative) Curved thermally toughened alkaline earth silicate safety glass23 Annex B (informative) Example of particle count 24 Figures Figure 1 Examples of width, B, and length, H, relative to the pane shape .8 Figure 2 Tolerance limits for
20、dimensions of rectangular panes9 Figure 3 Tong mark deformation .10 Figure 4 Representation of overall and local bow 12 Figure 5 Support conditions for the measurement of overall bow13 Figure 6 a) Arrissed edge (with blank spots) 14 Figure 6 b) Ground edge (with blank spots)14 Figure 6 c) Smooth gro
21、und edge (no blank spots).15 Figure 6 d) Polished edge.15 Figure 7 Relationship between hole and edge of pane 16 Figure 8 Relationship between two holes .16 Figure 9 Relationship between hole and corner of pane .17 Figure 10 Examples of the positioning of holes relative to the datum point18 Figure 1
22、1 Examples of notches and cut-outs .18 Figure 12 Position of impact point.19 Figure 13 Area to be excluded from the particle count determination and largest particle measurement.20 Figure 14 Examples of crack-free particles and the assessment regarding the number 20 Figure B.B1 Select the area of co
23、arsest fracture, place the template on the test specimen and draw round the template 24 Figure B.B2 Mark and count the perimeter fragments as 1/2 particle each25 Figure B.B3 Mark and count the central fragments and add these to the perimeter count to obtain the particle count for the specimen .26 Ta
24、bles Table 1 Nominal thicknesses and thickness tolerances 8 Table 2 Tolerances on width, B, and length, H .10 Table 3 Maximum values for overall and local bow14 Table 4 Tolerances on hole diameters.17 Table 5 Minimum particle count values.21 Table 6 Values for the mechanical strength of thermally to
25、ughened alkaline earth silicate safety glass.22EN 14321-1:2005 (E) 4 Foreword This European Standard (EN 14321-1:2005) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of which is held by IBN/BIN. This European Standard shall be given the status of a national
26、standard, either by publication of an identical text or by endorsement, at the latest by December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. This European Standard has been prepared under a mandate given to CEN by the European Commission and the Europ
27、ean Free Trade Association. No existing European Standard is superseded. This Part of the European Standard does not stand-alone, it is a part of one standard: EN 14321-1: Glass in building Thermally toughened alkaline earth silicate safety glass Part 1: Definition and description; prEN 14321-2: Gla
28、ss in building Thermally toughened alkaline earth silicate safety glass Part 2: Evaluation of conformity. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech
29、Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14321-1:2005 (E) 5 Introduction Thermally toughened alkal
30、ine earth silicate safety glass has a safer breakage behaviour when compared with annealed glass. When it should be used to offer protection under accidental human impact, thermally toughened alkaline earth silicate safety glass also should be classified according to EN 12600. NOTE CEN/TC129/WG8 is
31、producing standards for the determination of the design strength of glass and is preparing a design method. EN 14321-1:2005 (E) 6 1 Scope This European Standard specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat thermally toughened
32、alkaline earth silicate safety glass for use in buildings. Information on curved thermally toughened alkaline earth silicate safety glass is given in Annex A, but this product does not form part of this European Standard. Other requirements, not specified in this European Standard, can apply to ther
33、mally toughened alkaline earth silicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard. Thermally toughened alkaline earth si
34、licate safety glass, in this case, does not lose its mechanical or thermal characteristics. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest editi
35、on of the referenced document (including any amendments) applies. EN 1096-1, Glass in building Coated glass Part 1: Definitions and classification EN 12600, Glass in building Pendulum test Impact test method and classification for flat glass EN 14178-1, Glass in building Basic alkaline earth silicat
36、e glass products Part 1: Float glass 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 thermally toughened alkaline earth silicate safety glass glass within which a permanent surface compressive stress has been induced by a controlled
37、heating and cooling process in order to give it greatly increased resistance to mechanical and thermal stress and prescribed fragmentation characteristics 3.2 flat thermally toughened alkaline earth silicate safety glass thermally toughened alkaline earth silicate safety glass that has not been deli
38、berately given a specific profile during manufacture 3.3 enamelled thermally toughened alkaline earth silicate safety glass thermally toughened alkaline earth silicate safety glass which has a ceramic frit fired into the surface during the toughening process. After toughening the ceramic frit become
39、s an integral part of the glass NOTE In the UK, this glass is also known as opaque thermally toughened alkaline earth silicate safety glass. 3.4 horizontal toughening process in which the glass is supported on horizontal rollers EN 14321-1:2005 (E) 7 3.5 vertical toughening process in which the glas
40、s is suspended by tongs 4 Glass products Thermally toughened alkaline earth silicate safety glass shall be made from a monolithic glass generally corresponding to the following standard: alkaline earth silicate glass according to EN 14178-1 (float glass); this may also be coated in accordance with E
41、N 1096-1. 5 Fracture characteristics In the event of breakage, thermally toughened alkaline earth silicate safety glass fractures into numerous small pieces, the edges of which are generally blunt. NOTE Fragmentation in service does not always correspond to that described in Clause 8, due to restrai
42、nt from fixing or reprocessing (e.g. laminating), or due to the cause of fracture. 6 Dimensions and tolerances 6.1 Nominal thickness and thickness tolerances The nominal thicknesses and thickness tolerances shall be those given in the relevant product standard (see Clause 4), some of which are repro
43、duced in Table 1. EN 14321-1:2005 (E) 8 Table 1 Nominal thicknesses and thickness tolerances Dimensions in millimetres Nominal Thickness tolerances for glass type Thickness d Alkaline earth silicate - Float 4 0 , 2 5 0 , 2 6 0 , 2 8 0 , 3 10 0,3 12 0,3 15 0,5 The thickness of a pane shall be determi
44、ned as for the basic product. The measurement shall be taken at the centres of the 4 sides, and away from the area of any tong marks (see Figure 3), which may be present. 6.2 Width and length (sizes) 6.2.1 General When thermally toughened alkaline earth silicate safety glass dimensions are quoted fo
45、r rectangular panes, the first dimension shall be the width, B, and the second dimension the length, H, as shown in Figure 1. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position. Figure 1 Examples of width, B, and length, H, rela
46、tive to the pane shape EN 14321-1:2005 (E) 9 6.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer shall be consulted. 6.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the finished pane shall not be larger than a prescribed rectangle
47、resulting from the nominal dimensions increased by the tolerance, t, or smaller than a prescribed rectangle reduced by the tolerance, t. The sides of the prescribed rectangles are parallel to one another and these rectangles shall have a common centre (see Figure 2). The limits of squareness shall b
48、e determined by the prescribed rectangles. Tolerances are given in Table 2. Figure 2 Tolerance limits for dimensions of rectangular panes EN 14321-1:2005 (E) 10 Table 2 Tolerances on width, B, and length, H Dimensions in millimetres Nominal dimension Tolerance, t of side, B or H nominal glass thickn
49、ess, d 12 nominal glass thickness, d 12 2 000 2,5 (horizontal toughening) 3,0 (vertical toughening) 3,0 2 000 3 000 4,0 5,0 6.2.4 Edge deformation produced by vertical toughening The tongs used to suspend the glass during toughening can result in surface depressions, known as tong marks (see Figure 3). The centres of the tong marks may be situated up to a maximum of 20
