oSIST prEN 1748-1-1:2017
(Main)Glass in building - Special basic products - Borosilicate float glass - Part 1-1: Definitions and general physical and mechanical properties
Glass in building - Special basic products - Borosilicate float glass - Part 1-1: Definitions and general physical and mechanical properties
This European Standard specifies and classifies special basic products - borosilicate float glass, indicates their chemical composition, their main physical and mechanical characteristics, their dimensional and minimum quality requirements (in respect of optical and visual faults).
This European Standard applies to special basic products - borosilicate float glass supplied in stock sizes, supplied sizes or in cut sizes for final end use.
This European Standard does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0,05 m².
Glas im Bauwesen - Spezielle Basiserzeugnisse - Borosilikat-Floatglas - Teil 1-1: Definitionen und allgemeine physikalische und mechanische Eigenschaften
Diese Europäische Norm legt spezielle Basiserzeugnisse aus gefloatetem Borosilicatglas fest, klassifiziert diese und macht Angaben über deren chemische Zusammensetzung, wesentliche physikalische und mechanische Eigenschaften, Maße und Mindestanforderungen an die Qualität (in Hinsicht auf optische und sichtbare Fehler).
Diese Europäische Norm gilt für spezielle Basiserzeugnisse aus gefloatetem Borosilicatglas, die in Standardabmessungen oder in Festmaßen geliefert werden.
Diese Europäische Norm gilt nicht für Glas in Festmaßen von weniger als 100 mm oder mit einer Oberfläche von weniger als 0,05 m².
Verre dans la construction - Produits de base spéciaux - Glace borosilicate - Partie 1-1 : Définitions et propriétés physiques et mécaniques générales
La présente Norme européenne spécifie et classifie les produits de base spéciaux en glace borosilicate, indique leur composition chimique, leurs caractéristiques physiques et mécaniques principales, leurs dimensions et leurs exigences de qualité minimales (pour ce qui concerne les défauts optiques et visuels).
La présente Norme européenne s'applique aux produits de base spéciaux en glace borosilicate, livrés en dimensions standard, en dimensions fournies ou en dimensions découpées pour l'utilisation finale.
La présente Norme européenne ne s'applique pas aux tailles découpées finales dont une dimension est inférieure à 100 mm ni aux superficies inférieures à 0,05 m².
Steklo v gradbeništvu - Posebni osnovni proizvodi - 1. del: Borosilikatno ravno steklo -1-1. del: Definicija in splošne fizikalne in mehanske lastnosti
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 1748-1-1:2017
01-september-2017
Steklo v gradbeništvu - Posebni osnovni proizvodi - 1. del: Borosilikatno ravno
steklo -1-1. del: Definicija in splošne fizikalne in mehanske lastnosti
Glass in building - Special basic products - Borosilicate float glass - Part 1-1: Definitions
and general physical and mechanical properties
Glas im Bauwesen - Spezielle Basiserzeugnisse - Borosilikat-Floatglas - Teil 1-1:
Definitionen und allgemeine physikalische und mechanische Eigenschaften
Verre dans la construction - Produits de base spéciaux - Glace borosilicate - Partie 1-1 :
Définitions et propriétés physiques et mécaniques générales
Ta slovenski standard je istoveten z: prEN 1748-1-1
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
oSIST prEN 1748-1-1:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 1748-1-1:2017
---------------------- Page: 2 ----------------------
oSIST prEN 1748-1-1:2017
DRAFT
EUROPEAN STANDARD
prEN 1748-1-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 81.040.20 Will supersede EN 1748-1-1:2004
English Version
Glass in building - Special basic products - Borosilicate
float glass - Part 1-1: Definitions and general physical and
mechanical properties
Verre dans la construction - Produits de base spéciaux Glas im Bauwesen - Spezielle Basiserzeugnisse -
- Glace de borosilicate - Partie 1-1 : Définitions et Borosilikat-Floatglas - Teil 1-1: Definitionen und
propriétés physiques et mécaniques générales allgemeine physikalische und mechanische
Eigenschaften
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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1748-1-1:2017 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Chemical composition . 6
4.1 General . 6
4.2 Tint . 6
5 Physical and mechanical characteristics . 6
5.1 General characteristics . 6
5.2 Characteristic bending strength . 7
5.3 Designation of clear borosilicate float glass . 7
5.3.1 General . 7
5.3.2 Clear transparent borosilicate float glass . 8
5.4 Stability of physical and chemical characteristics . 8
6 Dimensional requirements. 9
6.1 Manufacturing dimensions . 9
6.1.1 Stock sizes . 9
6.1.2 Supplied and final cut sizes . 9
6.2 Thickness and thickness tolerances . 9
6.3 Length, width and squareness . 10
7 Quality requirements . 10
7.1 General . 10
7.2 Quality criteria and their evaluation . 11
7.2.1 Optical . 11
7.2.2 Appearance . 11
7.3 Methods of observation and measurement . 11
7.3.1 Optical faults . 11
7.3.2 Visual faults (spot faults, linear/extended faults) . 12
7.4 Acceptance levels . 13
7.4.1 Optical faults . 13
7.4.2 Visual faults (spot faults, linear/extended faults) . 13
7.5 Edge defects for final cut sizes . 14
7.5.1 Entrant and emergent faults . 14
7.5.2 Bevel . 14
7.5.3 Limitations on edge defects . 15
8 Designation. 15
Annex A (informative) Complementary information related to REACH . 16
Bibliography . 17
2
---------------------- Page: 4 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
European foreword
This document (prEN 1748-1-1:2017) 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 1748-1-1:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This European Standard consists of the following parts:
— EN 1748-1-1 Glass in Building — Special basic products - Borosilicate float glass — Part 1-1:
Definitions and general physical and mechanical properties;
— EN 1748-1-2 Glass in Building — Special basic products - Borosilicate float glass — Part 1-2:
Product standard.
This European Standard differs from EN 1748-1-1:2004 as follows:
a) Rolled and Drawn sheet production methods have been removed, the standard scope is reduced to
Borosilicate float glass (scope and title have been modified);
b) chemical composition has been modified in Table 1;
c) classes for linear expansion coefficients have been deleted (notes in Table 2);
d) Clause 5 and Clause 6 have been revised, further nominal thicknesses have been added, sub
Clause 6.3 “Tolerances and squareness” has been completely revised; the squareness of rectangular
glass panes is now expressed by the difference between its diagonals;
e) Clause 5 translucent borosilicate glass has been removed;
f) Clause 7 has been completely revised (including the Zebra method of observation optical faults);
g) Clause 7: categories of defects have been removed, only one quality is defined (Table 8);
h) a new informative Annex A given complementary information related to REACH has been added;
i) the document has been editorial revised.
3
---------------------- Page: 5 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
1 Scope
This European Standard specifies and classifies special basic products - borosilicate float glass, indicates
their chemical composition, their main physical and mechanical characteristics, their dimensional and
minimum quality requirements (in respect of optical and visual faults).
This European Standard applies to special basic products - borosilicate float glass supplied in stock
sizes, supplied sizes or in cut sizes for final end use.
This European Standard does not apply to final cut sizes having a dimension less than 100 mm or a
2
surface area less than 0,05 m .
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 410, Glass in building — Determination of luminous and solar characteristics of glazing
ISO 9385, Glass and glass-ceramics — Knoop hardness test
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
borosilicate glass
silicate glass containing between 2 % and 5 % boron and with a chemical composition according to 4.1
of this standard
Note 1 to entry: As a result of the composition it has a high thermal shock resistance and a very high hydrolytic
and acid resistance.
3.2
borosilicate float glass
flat, transparent, clear or tinted borosilicate glass having parallel and polished faces obtained by
continuous casting and floatation on a metal bath
Note 1 to entry: In French called 'glace' and in German 'Floatglas'.
3.3
length, H and width, B
defined with reference to the direction of draw of the glass ribbon as shown in Figure 1
4
---------------------- Page: 6 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
Key
1 → direction of draw
H length
B width
Figure 1 — Relationship between length, width and direction of draw
3.4
stock sizes
glass delivered in manufacturer's standard stock sizes
3.5
supplied size
pane of glass that has been supplied either as raw material for further processing and/or cutting down
to a size for installation
Note 1 to entry: This is a size that is outside the stock size.
3.6
final cut size
pane of glass that has been cut down to the dimensions being required either for installation or
processing into a final product
Note 1 to entry: Examples of processed final products are insulating glass units and thermally toughened safety
glass of those dimensions.
3.7
optical fault
fault which leads to distortions in the appearance of objects observed through the glass
3.8
visual fault
fault which alters the visual quality of the glass
Note 1 to entry: Visual faults include spot faults and linear / extended faults.
3.9
spot fault
nucleus which is generally accompanied by a halo of distorted glass
5
---------------------- Page: 7 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
Note 1 to entry: Spot fault can be solid inclusions, bubbles, etc.
3.10
halo
area locally distorted, generally around a point defect
3.11
linear/extended fault
fault which can be on or in the glass, in the form of deposits, marks or scratches that occupy an
extended length or area
3.12
edge defect
defect which can occur on the edge of a cut size piece in the form of entrant and emergent fault and/or
bevel
4 Chemical composition
4.1 General
The magnitude of the proportions by mass of the principal constituents of borosilicate float glass
covered by this European Standard is given in Table 1, see also Annex A.
NOTE Oxygen is not mentioned in Table 1 (see Annex A).
Table 1 — Magnitude of the proportions by mass of the constituents of borosilicate glass
Constituents Proportion by mass of element
Silicon (Si) 32 % to 41 %
Aluminium (Al) 0 % to 4,3 %
Boron (Bo) 2 % to 5 %
Sodium (Na) 0 % to 6 %
Potassium (K) 0 % to 6,7 %
a < 5 %
Other components excluding oxygen
a
Properties other than photometric characteristics shall not be significantly altered by these other
components.
4.2 Tint
Body tinted glass is obtained by the addition of suitable materials.
5 Physical and mechanical characteristics
5.1 General characteristics
Conventional numerical values for the physical and mechanical characteristics of borosilicate float glass
excluding ‘Characteristic bending strength’ (f ) are given in Table 2. These values, for normal
g,k
annealed glass without any further toughening, are not precise requirements with which the glass shall
strictly comply, but are the generally accepted figures for use in calculations where a high degree of
accuracy is not required.
6
---------------------- Page: 8 ----------------------
oSIST prEN 1748-1-1:2017
prEN 1748-1-1:2017 (E)
Table 2 — General characteristic values of borosilicate glass
Characteristic Symbol Value and unit
3
Density (at 18 °C) ρ 2 200 kg/m to
3
2 500 kg/m
Hardness (Knoop) HK a
450 to 600
0,1/20
10
Young's modulus (modulus of elasticity) E (6 to 7) × 10 Pa
Poisson's ratio
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.