kSIST prEN 13024-1:2018

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.

oSIST prEN 13024-1:2018
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.

oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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
oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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

oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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.
oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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.
oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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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prEN 13024-1:2018 (E)
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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prEN 13024-1:2018 (E)
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.
oSIST prEN 13024-1:2018
prEN 13024-1:2018 (E)
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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prEN 13024-1:2018 (E)
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
...