FprEN 13024-1

Glass in building - Thermally toughened borosilicate safety glass - Part 1: Definition and description

This document specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat thermally toughened borosilicate safety glass for use in buildings.
This standard deals exclusively with thermally toughened borosilicate safety glass manufactured by the horizontal toughening process.
Other requirements, not specified in this document, can apply to thermally toughened borosilicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard. Thermally toughened borosilicate safety glass, in this case, does not lose its mechanical or thermal characteristics and its resistance to temperature differentials.
Surface finished glasses (e.g. sandblasted, acid etched) after toughening are not covered by this document.

Glas im Bauwesen - Thermisch vorgespanntes Borosilicat-Einscheibensicherheitsglas - Teil 1: Definition und Beschreibung

Dieses Dokument legt die Grenzabmaße, Geradheit, Kantenbearbeitung, das Bruchverhalten und physikalische und mechanische Eigenschaften von einscheibigem, flachem, thermisch vorgespanntem Borosilicat-Einscheibensicherheitsglas für die Verwendung im Bauwesen fest.
Diese Norm behandelt ausschließlich thermisch vorgespanntes Borosilicat-Einscheibensicherheitsglas, das im horizontalen Vorspannverfahren hergestellt wird.
An thermisch vorgespannte Borosilicat-Einscheibensicherheitsgläser können andere Anforderungen, die in diesem Dokument nicht beschrieben sind, gestellt werden, wenn sie Bestandteil sind von Kombinationen wie z. B. Verbundglas, Isolierglas oder wenn sie weiterverarbeitet werden, z. B. beschichtet. Die zusätzlichen Anforderungen sind in den entsprechenden Normen der Fertigprodukte festgelegt. In diesem Fall verliert thermisch vorgespanntes Borosilicat-Einscheibensicherheitsglas seine mechanischen oder thermischen Eigenschaften oder seine Beständigkeit gegen Temperaturunterschiede nicht.
Gläser, die nach dem Vorspannen oberflächenbearbeitet werden (z. B. durch Sandstrahlen oder Säureätzung), fallen nicht in den Anwendungsbereich dieser Norm.

Verre dans la construction - Verre borosilicate de sécurité trempé thermiquement - Partie 1: Définition et description

La présente Norme européenne spécifie les tolérances, la planéité, la finition des chants, la fragmentation et les caractéristiques physiques et mécaniques du verre plat monolithique borosilicate de sécurité, trempé thermiquement, destiné à être utilisé dans la construction.
La présente norme traite exclusivement du verre borosilicate de sécurité trempé thermiquement fabriqué par le procédé de trempe horizontale.
D’autres exigences, non spécifiées dans la présente Norme européenne, sont susceptibles de s’appliquer au verre borosilicate de sécurité trempé thermiquement intégré dans des ensembles, par exemple des ensembles en verre feuilleté ou des vitrages isolants, ou de subir un traitement supplémentaire, par exemple un revêtement. Les exigences supplémentaires sont spécifiées dans la norme de produit correspondante. Dans ce cas, le verre borosilicate de sécurité trempé thermiquement ne perd pas ses caractéristiques mécaniques ou thermiques ni sa résistance aux températures différentielles.
Les verres dont la surface est finie (par exemple par sablage, gravure à l’acide) après trempe ne sont pas couverts par la présente Norme européenne.

Steklo v gradbeništvu - Kaljeno borosilikatno varnostno steklo - 1. del: Definicija in opis

General Information

• Status: Withdrawn
• Publication Date: 05-Jun-2019
• Withdrawal Date: 05-Sep-2019
• ICS: 81.040.20 - Glass in building
• Technical Committee: CEN/TC 129 - Glass in building
• Drafting Committee: CEN/TC 129/WG 2 - Toughened, heat strengthened and enamelled glass
• Current Stage: 5098 - Decision to abandon - Formal Approval
• Completion Date: 22-Feb-2022
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/135 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on flat glass, profiled glass and glass block products
• Ref Project: kSIST prEN 13024-1:2018 - Glass in building - Thermally toughened borosilicate safety glass - Part 1: Definition and description

Relations

• Revises: EN 13024-1:2011 - Glass in building - Thermally toughened borosilicate safety glass - Part 1: Definition and description
• Effective Date: 13-Nov-2017

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13024-1:2018
01-maj-2018

Steklo v gradbeništvu - Kaljeno borosilikatno varnostno steklo - 1. del: Definicija in

opis

Glass in building - Thermally toughened borosilicate safety glass - Part 1: Definition and

description

Glas im Bauwesen - Thermisch vorgespanntes Borosilicat-Einscheibensicherheitsglas -

Teil 1: Definition und Beschreibung

Verre dans la construction - Verre borosilicate de sécurité trempé thermiquement - Partie

1: Définition et description
Ta slovenski standard je istoveten z: prEN 13024-1
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
oSIST prEN 13024-1:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13024-1:2018
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oSIST prEN 13024-1:2018
DRAFT
EUROPEAN STANDARD
prEN 13024-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 81.040.20 Will supersede EN 13024-1:2011
English Version
Glass in building - Thermally toughened borosilicate safety
glass - Part 1: Definition and description

Verre dans la construction - Verre borosilicate de Glas im Bauwesen - Thermisch vorgespanntes

sécurité trempé thermiquement - Partie 1: Définition et Borosilicat-Einscheiben-Sicherheitsglas - Teil 1:

description Definition und Beschreibung

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 129.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13024-1:2018 E

worldwide for CEN national Members.
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Contents Page

European foreword ...................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

4 Glass products .................................................................................................................................................. 7

5 Fracture characteristics ............................................................................................................................... 7

6 Dimensions and tolerances ......................................................................................................................... 8

6.1 Nominal thickness and thickness tolerances ....................................................................................... 8

6.2 Width and length (sizes) .............................................................................................................................. 8

6.2.1 General................................................................................................................................................................ 8

6.2.2 Maximum and minimum sizes ................................................................................................................... 9

6.2.3 Tolerances and squareness ......................................................................................................................... 9

6.3 Flatness ............................................................................................................................................................. 10

6.3.1 General.............................................................................................................................................................. 10

6.3.2 Measurement of overall bow .................................................................................................................... 12

6.3.3 Measurement of rollerwave distortion ................................................................................................. 13

6.3.4 Measurement of edge lift ............................................................................................................................ 14

6.3.5 Limitation on overall bow, roller waves and edge lift ..................................................................... 15

6.3.6 Other distortions ........................................................................................................................................... 16

7 Edge and/or surface work, holes, notches and cut-outs ................................................................. 16

7.1 Warning ............................................................................................................................................................ 16

7.2 Edge working of glass for toughening ................................................................................................... 16

7.3 Profiled edges ................................................................................................................................................. 17

7.4 Round holes .................................................................................................................................................... 17

7.4.1 General.............................................................................................................................................................. 17

7.4.2 Diameter of holes .......................................................................................................................................... 17

7.4.3 Limitations on position of holes .............................................................................................................. 17

7.4.4 Tolerances on hole diameters .................................................................................................................. 18

7.4.5 Tolerances on position of holes ............................................................................................................... 19

7.5 Holes/others ................................................................................................................................................... 19

7.6 Notches and cut-outs ................................................................................................................................... 20

7.7 Shaped panes .................................................................................................................................................. 20

8 Fragmentation test ....................................................................................................................................... 20

8.1 General.............................................................................................................................................................. 20

8.2 Dimensions and number of test specimens ........................................................................................ 20

8.3 Test procedure ............................................................................................................................................... 20

8.4 Assessment of fragmentation ................................................................................................................... 21

8.5 Minimum values from the particle count ............................................................................................. 22

8.6 Selection of the longest particle .............................................................................................................. 22

8.7 Maximum length of longest particle ...................................................................................................... 22

9 Other physical characteristics ................................................................................................................. 22

9.1 Optical distortion .......................................................................................................................................... 22

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9.2 Anisotropy (iridescence) ........................................................................................................................... 23

9.3 Thermal durability ....................................................................................................................................... 23

9.4 Mechanical strength .................................................................................................................................... 23

9.5 Classification of performance under accidental human impact .................................................. 23

10 Marking ............................................................................................................................................................ 24

Annex A (informative) Alternative method for the measurement of roller wave distortion ........ 25

A.1 Apparatus ........................................................................................................................................................ 25

A.2 Method .............................................................................................................................................................. 25

A.3 Limitations ...................................................................................................................................................... 26

A.4 Alternative use of apparatus .................................................................................................................... 26

Annex B (informative) Example of particle count .......................................................................................... 27

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European foreword

This document (prEN 13024-1:2018) has been prepared by Technical Committee CEN/TC 129 “Glass in

building”, the secretariat of which is held by NBN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13024-1:2011.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

In comparison with the previous edition, the following technical modifications have been made:

a) Clause 1 has been revised;
b) Clause 3 has been re-sorted (to agree with EN 12150-1:2015);
c) Clause 5 has been revised;

d) Clause 6.1, Table 1 with nominal thicknesses has been revised. Some thicknesses have been

changed and some thicknesses have been deleted. Drawn sheet, rolled and cast glass is no longer

included as they have been deleted from standard of the special basic glass prEN 1748-1-1:2017;

e) Clause 6.3.2 has been revised;
f) Title of Clause 6.3.3 has been revised;
g) Table 8 has been revised;
h) Clause “Bibliography” has been deleted.
EN 13024 is divided into the following parts:

— EN 13024-1, Glass in building — Thermally toughened borosilicate safety glass — Part 1: Definition

and description;

— EN 13024-2, Glass in building — Thermally toughened borosilicate safety glass — Part 2: Product

standard.
This document contains other aspects of importance for trade.
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Introduction

Thermally toughened borosilicate safety glass has a higher thermal shock resistance and a safer

breakage behaviour when compared with annealed glass. When it should be used to offer protection

under accidental human impact, thermally toughened borosilicate safety glass should also be classified

according to EN 12600.
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1 Scope

This document specifies tolerances, flatness, edgework, fragmentation and physical and mechanical

characteristics of monolithic flat thermally toughened borosilicate safety glass for use in buildings.

This standard deals exclusively with thermally toughened borosilicate safety glass manufactured by the

horizontal toughening process.

Other requirements, not specified in this document, can apply to thermally toughened borosilicate

safety glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or

undergo an additional treatment, e.g. coating. The additional requirements are specified in the

appropriate product standard. Thermally toughened borosilicate safety glass, in this case, does not lose

its mechanical or thermal characteristics and its resistance to temperature differentials.

Surface finished glasses (e.g. sandblasted, acid etched) after toughening are not covered by this

document.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification

EN 1288-3, Glass in building — Determination of the bending strength of glass — Part 3: Test with

specimen supported at two points (four point bending)

EN 1748-1-1, Glass in building — Special basic products — Borosilicate glasses — Part 1-1: Definition and

general physical and mechanical properties

EN 12600, Glass in building — Pendulum test — Impact test method and classification for flat glass

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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
3.1
thermally toughened borosilicate safety glass

glass within which a permanent surface compressive stress, additionally to the basic mechanical

strength, has been induced by a controlled heating and cooling process in order to give it greatly

increased resistance to mechanical and thermal stress and prescribed fragmentation characteristics

Note 1 to entry: The mechanical properties, i.e. thermal durability and mechanical strength, and safety properties,

i.e. fragmentation characteristics, are generated by the level of surface compression. These properties are not size

dependent.
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3.2
flat thermally toughened borosilicate safety glass

thermally toughened borosilicate safety glass which has not been deliberately given a specific profile

during manufacture
3.3
enamelled thermally toughened borosilicate safety glass

thermally toughened borosilicate safety glass which has a ceramic frit fired into the surface during the

toughening process

Note 1 to entry: After toughening, the ceramic frit becomes an integral part of the glass.

Note 2 to entry: In the UK, this glass is also known as opaque thermally toughened borosilicate safety glass.

Note 3 to entry: The application of the ceramic frit may be by a continuous process or discontinuous application,

e.g. screen printing. The enamelled surface could be partially or wholly covered.

3.4
horizontal process
process in which the glass is supported on horizontal rollers
3.5
edge lift

distortion produced in horizontal toughened glass, at the leading and trailing edge of the plate

3.6
overall bow

deformation of the whole pane of toughened glass caused by the heating and cooling process

3.7
roller wave distortion

distortion produced in horizontally toughened glass as a result of the glass during the toughening

process being in contact with the rollers
4 Glass products

Thermally toughened borosilicate safety glass is made from a monolithic glass generally corresponding

to one of the following standards:
— borosilicate float glass according to EN 1748-1-1;
— coated glass according to EN 1096-1.

Glass of nominal thicknesses other than those covered in the above standards is possible.

5 Fracture characteristics

The fracture characteristics of thermally toughened borosilicate safety glass are directly related to the

amount of surface compression; these properties are not size dependent.

When the thermally toughened borosilicate safety glass is manufactured with the correct degree of

surface compression then in the event of breakage thermally toughened borosilicate safety glass

fractures into numerous small pieces, the edges of which are generally blunt.

NOTE 1 The degree of surface compression required is dependent upon glass type and thickness.

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NOTE 2 The fracture characteristics of glass are unaffected by temperatures between –50 °C and +100 °C.

The fragmentation described in Clause 8 is undertaken on test specimens without any mechanical

constraint.

The fragmentation in service may not always correspond to that determined during the fragmentation

test due to the imposition of other stresses, i.e. from fixing or from reprocessing (e.g. laminating).

6 Dimensions and tolerances
6.1 Nominal thickness and thickness tolerances

The nominal thicknesses and thickness tolerances are those given in the relevant product standard (see

Clause 4), some of which are reproduced in Table 1.
Table 1 — Nominal thicknesses and thickness tolerances
Dimensions in millimetres
Thickness tolerances
Nominal thickness d
for float glass
3,3 ±0,2
3,8 ±0,2
5 ±0,2
5,5 ±0,2
6 ±0,2
6,5 ±0,2
7,5 ±0,3
8 ±0,3
9 ±0,3
10 ±0,3
12 ±0,3
15 ±0,5

The thickness of a pane shall be determined as for the basic product. The measurement shall be taken at

the centres of the four sides.
6.2 Width and length (sizes)
6.2.1 General

When thermally toughened borosilicate safety glass dimensions are quoted for 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.
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Figure 1 — Examples of width, B, and length, H, relative to the pane shape
6.2.2 Maximum and minimum sizes
For maximum and minimum sizes, the manufacturer should 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 the

nominal dimensions increased by the tolerance t, or smaller than the nominal dimensions reduced by

the tolerance t. Limits are given in Table 2.

The squareness of rectangular glass panes is expressed by the difference between its diagonals.

The difference between the two diagonal lengths of the pane of glass shall not be larger than the

deviation limit, v, as specified in Table 3.
Table 2 — Tolerances on width, B, and length, H
Dimensions in millimetres
Tolerance, t
Nominal dimension of side,
nominal glass thickness, nominal glass thickness,
B or H
d ≤ 8 d > 8
≤ 2 000 ±3,0 ±4,0
2 000 < B or H ≤ 3 000 ±4,0 ±5,0
> 3 000 ±5,0 ±6,0
Table 3 — Limit deviations for the difference between diagonals
Dimensions in millimetres
Limit deviation v on the difference between diagonals
Nominal dimension nominal glass thickness, nominal glass thickness,
B or H d ≤ 8 d > 8
≤ 2 000 ≤ 4 ≤ 6
2 000 < B or H ≤ 3 000 ≤ 6 ≤ 8
> 3 000 ≤ 8 ≤ 10
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6.3 Flatness
6.3.1 General

By the very nature of the toughening process, it is not possible to obtain a product as flat as annealed

glass. This difference in
...