oSIST prEN 1748-2-2:2017

SLOVENSKI STANDARD
oSIST prEN 1748-2-2:2017
01-oktober-2017
Steklo v stavbah - Posebni osnovni proizvodi - Steklena keramika - 2-2. del:
Standard za proizvod
Glass in building - Special basic products - Glass ceramics - Part 2-2: Product standard
Glas im Bauwesen - Spezielle Basiserzeugnisse - Glaskeramik - Teil 2-2: Produktnorm
Verre dans la construction - Produits de base spéciaux - Vitrocéramiques - Partie 2-2 :
Norme de produit
Ta slovenski standard je istoveten z: prEN 1748-2-2
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
81.060.01 Keramika na splošno Ceramics in general
oSIST prEN 1748-2-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1748-2-2:2017


DRAFT
EUROPEAN STANDARD
prEN 1748-2-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

August 2017
ICS 81.040.20; 81.060.01 Will supersede EN 1748-2-2:2004
English Version

Glass in building - Special basic products - Glass ceramics -
Part 2-2: Product standard
Verre dans la construction - Produits de base spéciaux Glas im Bauwesen - Spezielle Basiserzeugnisse -
- Vitrocéramiques - Partie 2-2 : Norme de produit Glaskeramik - Teil 2-2: Produktnorm
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 1748-2-2:2017 E
worldwide for CEN national Members.

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Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 7
4.1 Product description . 7
4.2 Determination of the characteristic’s performances . 7
4.2.1 Characteristics of basic glass ceramics . 7
4.2.2 Determination of characteristics of basic glass ceramics products . 8
4.3 Characteristics other than listed in 4.2 . 11
4.4 Dangerous substances . 11
5 Assessment and verification of constancy of performance – AVCP. 11
5.1 General . 11
5.2 Determination of the product type (see 5.1, 1)) . 12
5.2.1 General . 12
5.2.2 Type testing of characteristic's performances . 12
5.2.3 Test reports . 12
5.2.4 Multiple lines/sites . 13
5.3 Factory Production control (FPC) . 13
5.3.1 General . 13
5.3.2 Inspection of samples in accordance with a prescribed test plan (see 5.1, 2) a)) . 13
5.4 Initial inspection of factory and of factory production control (see 5.1, 2b) . 14
5.5 Continuous surveillance and assessment of the factory production control (see 5.1,
2) c)) . 15
5.6 Procedure for modifications . 16
5.7 Pre-production products (e.g. prototypes) . 16
6 Marking and labelling . 16
6.1 General . 16
6.2 Product marking. 16
Annex A (normative) Factory Production Control . 17
A.1 Factory Production Control requirements . 17
A.1.1 General . 17
A.1.2 Organization . 17
A.1.3 Control system . 17
A.1.4 Equipment . 18
A.1.5 Inspection and testing . 18
A.1.6 Non-complying materials / products . 18
A.2 Inspection and testing tables of basic glass ceramics production. 18
A.2.1 Information on Tables A.1 to A.3 . 18
A.2.2 Use of proxy testing . 19
Annex B (normative) Type testing of spectrophotometric and energy characteristics . 24
B.1 Sampling . 24
B.2 Measurement of spectrophotometric characteristics . 24
B.3 Tolerances on spectrophotometric characteristics . 24
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Annex C (informative) Provisions for voluntary involvement of third party(ies) . 26
C.1 General . 26
C.2 Voluntary tasks for third parties . 26
C.3 Marking and labelling . 26
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 27
ZA.1 Scope and relevant characteristics . 27
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 28
ZA.3 Assignment of AVCP tasks . 29
Bibliography . 33

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oSIST prEN 1748-2-2:2017
prEN 1748-2-2:2017 (E)
European foreword
This document (prEN 1748-2-2:2017) 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 1748-2-2:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports basic work requirements of EU Regulation 305/2011.
For relationship with EU Regulation/Directive(s), see informative Annex ZA which is an integral part of
this document.
The main changes compared to the previous edition are the following:
a) The standard has been revised to fulfil the requirements of the Regulation (EU) No 305/2011
(Construction Product Regulation), modified by Regulations (EU) No 157/2014, (EU) No 568/2014
and (EU) No 574/2014.
b) The solar factor, g, is listed within the spectrophotometric characteristics to be declared in the
Declaration of Performances (DoP).
c) The durability/conformity assessment is listed within the characteristics to be declared in the DoP.
d) The mechanical resistance shall be given in the DoP by the characteristic bending strength of the
glass.
EN 1748 is currently composed with the following parts:
— EN 1748-1-1, Glass in building — Special basic products —Borosilicate glasses — Part 1-1: Definition
and general physical and mechanical properties;
— EN 1748-1-2, Glass in building — Special basic products — Borosilicate glasses — Part 1-2:
Evaluation of conformity/Product standard;
— EN 1748-2-1, Glass in Building — Special basic products — Glass ceramics — Part 2-1: Definitions
and general physical and mechanical properties;
— EN 1748-2-2, Glass in building — Special basic products — Glass ceramics — Part 2-2: Product
standard.
This document contains other aspects of importance for trade.
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1 Scope
This European standard covers the evaluation of conformity and the factory production control of basic
glass ceramics for use in buildings.
NOTE For glass products with electrical wiring or connections for, e.g. alarm or heating purposes, other
directives, e.g. Low Voltage Directive, may apply.
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 356:1999, Glass in building — Security glazing — Testing and classification of resistance against
manual attack
EN 410:2011, Glass in building — Determination of luminous and solar characteristics of glazing
EN 673:2011, Glass in building —Determination of thermal transmittance (U value) — Calculation
method
EN 1063:1999, Glass in building — Security glazing — Testing and classification of resistance against
bullet attack
prEN 1748-2-1:2017, Glass in Building — Special basic products - Glass ceramics — Part 2-1: Definitions
and general physical and mechanical properties
EN 12600:2002, Glass in building — Pendulum test — Impact test method and classification for flat glass
EN 12758:2011, Glass in building — Glazing and airborne sound insulation — Product descriptions and
determination of properties
EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements — Part 1:
Classification using data from reaction to fire tests
EN 13501-2:2016, Fire classification of construction products and building elements — Part 2:
Classification using data from fire resistance tests, excluding ventilation services
EN 13501-5:2016, Fire classification of construction products and building elements — Part 5:
Classification using data from external fire exposure to roofs tests
EN 13541:2012, Glass in building — Security glazing —- Testing and classification of resistance against
explosion pressure
EN 15998:2010, Glass in building — Safety in case of fire, fire resistance - Glass testing methodology for
the purpose of classification
prEN 16612:2017, Glass in building — Determination of the lateral load resistance of glass panes by
calculation
ISO 9385:1990, Glass and glass-ceramics — Knoop hardness test
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 1748-2-1:2017 and the
following apply.
3.1
Factory Production Control
FPC
documented, permanent and internal control of production in a factory, in accordance with this
standard
Note 1 to entry: See also Annex A.
3.2
product-type
set of representative performance levels or classes of a construction product, in relation to its essential
characteristics, produced using a given combination of raw materials or other elements in a specific
production process
3.3
essential characteristic
characteristic of the construction product which relate to the basic requirements for construction
works
Note 1 to entry: Basic requirements for construction work are given in Regulation (EU) No 305/2011, Annex I.
3.4
performance of a construction product
performance related to the relevant essential characteristics, expressed by level or class, or in a
description
3.5
level
result of the assessment of the performance of a construction product in relation to its essential
characteristics, expressed as a numerical value
3.6
class
range of levels, delimited by a minimum and a maximum value, of performance of a construction
product
3.7
type testing
TT
determination of the performance of a product (characteristic, durability), on the basis of either actual
tests or other procedures (such as conventional, standardised, tabulated or generally accepted values,
standardised or recognised calculation methods, test reports when made available, …), in accordance
with this European standard and that demonstrates compliance with this European standard
3.8
test report
document that covers the results of tests undertaken on a representative sample of the product from
production or on a prototype design of the product
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3.9
product description
document that details the relevant parameters, e.g. process conditions, structure, etc., for defining a
product that complies with the standard and that includes specific reference(s) to characteristics that
are modified by the production process
3.10
product family
group of products determined by the manufacturer, which is made with similar components and
processes and which is tested for FPC using the same test method
3.11
significant change
variation in performance beyond the permitted tolerance for the characteristic
4 Requirements
4.1 Product description
For conformity purposes the basic glass ceramics products manufacturer is responsible for the
preparation and maintenance of the product description. This description shall describe the product
and/or product families.
Disclosure of the product description shall be at the discretion of the basic glass ceramics products
manufacturer or his agent except in the case of regulatory requirements.
The product description shall contain at least the following:
— a reference to prEN 1748-2-1:2017 and prEN 1748-2-2:2017 and all other standards with which
the manufacturer claims compliance;
— the type of manufacturing process used, i.e. float glass or rolled glass;
— a description of the product family(ies);
— the spectrophotometric properties of the basic glass ceramics products.
The definition of product families shall be consistent with the product description.
4.2 Determination of the characteristic’s performances
4.2.1 Characteristics of basic glass ceramics
Basic glass ceramics products are made in accordance to prEN 1748-2-1:2017. For the characteristics
listed in Table 1, the values given in prEN 1748-2-1:2017, 5.1 and 5.2 shall be used.
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Table 1 — Information on the characteristics of basic glass ceramics
Characteristic Symbol Unit
3
Density ρ kg/m
Hardness (Knoop hardness in accordance with ISO 9385) HK Dimensionless
0,1/20
Young's modulus E GPa
Poisson's ratio μ Dimensionless
Characteristic bending strength f MPa
g,k
Resistance against temperature changes and temperature  K
diff i l
Specific heat capacity c J/(kg.K)
−1
Coefficient of linear expansion α K
Thermal conductivity (for U-value) λ W/(m*K)
Mean refractive index to visible radiation n Dimensionless
4.2.2 Determination of characteristics of basic glass ceramics products
4.2.2.1 General
If the basic glass ceramics manufacturer wishes to claim that any performance characteristic is
independent of the production equipment used, then the factory production control system shall be in
accordance with this document including his specific process control conditions.
4.2.2.2 Safety in the case of fire - Resistance to fire
Fire resistance shall be determined and classified in accordance with EN 13501-2.
EN 15998 specifies the testing methodology to be used for glass products that are claiming fire
resistance.
4.2.2.3 Safety in the case of fire - Reaction to fire
Reaction to fire shall be determined and classified in accordance with EN 13501-1.
Glass ceramics products are products/materials that do not require to be tested for reaction to fire (e.g.
Products/materials of Classes A1 according to Commission Decision 96/603/EC, as amended
2000/605/EC).
4.2.2.4 Safety in the case of fire - External fire performance (for roof coverings only)
Where the manufacturer wishes to declare external fire performance (e.g. when subject to regulatory
requirements), the product shall be tested in accordance with EN 13501-5.
4.2.2.5 Safety in use - Bullet resistance: shatter properties and resistance to attack
Bullet resistance shall be determined and classified in accordance with EN 1063.
4.2.2.6 Safety in use - Explosion resistance: impact behaviour and resistance to impact
Explosion resistance shall be determined and classified in accordance with EN 13541.
4.2.2.7 Safety in use - Burglar resistance: shatter properties and resistance to attack
Burglar resistance shall be determined and classified in accordance with EN 356.
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4.2.2.8 Safety in use - Pendulum body impact resistance: shatter properties (safe breakability)
and resistance to impact
Pendulum body impact resistance shall be determined and classified in accordance with EN 12600.
4.2.2.9 Safety in use - Mechanical resistance: Resistance against sudden temperature changes
and temperature differentials
The resistance against sudden temperature changes and temperature differentials is a generally
accepted value that is given in prEN 1748-2-1:2017 and shall be ensured by compliance with this
standard.
4.2.2.10 Safety in use - Mechanical resistance: Resistance against wind, snow, permanent load
and/or imposed loads of the glass unit
The mechanical resistance of basic glass ceramics is a characteristic value that shall be ensured by
compliance with this document.
The value to be declared is the characteristic bending strength, as defined in prEN 1748-2-1:2017, 5.2.
As long as prEN 16612 is not applicable for the glass design with respect to the concerned construction
or building site, then the current method of determining mechanical resistance in the country of
destination shall be applied.
4.2.2.11 Protection against noise - Direct airborne sound reduction
The sound reduction indexes shall be determined in accordance with EN 12758.
The values to be declared shall be rounded down to the nearest whole number.
4.2.2.12 Energy conservation and heat retention - Thermal properties
The thermal transmittance value (U-value) shall be determined in accordance with the following
procedure:
a) The emissivity shall be taken equal to 0,837, as given in prEN 1748-2-1:2017
b) The U-value shall be determined by calculation in accordance with EN 673, with the normal
emissivity as defined above and the nominal thickness of the glass panes.
4.2.2.13 Energy conservation and heat retention - Radiation properties: Light transmittance and
reflectance
The light transmittance and light reflectance shall be determined either:
a) in accordance with the following procedure:
1) The light transmittance and light reflectance of one sample of basic glass ceramics product
shall be determined in accordance with EN 410 and Annex B. The exact thickness of the glass
shall be measured.
2) The light transmittance and the light reflectance of any other thickness shall be calculated
according to EN 410.
3) The tool used to calculate the light transmittance and the light reflectance shall be validated.
b) or measured following EN 410 and Annex B.
The tolerances on the calculated light transmittance and light reflectance are given in Annex B.
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4.2.2.14 Energy conservation and heat retention - Radiation properties: Solar energy
characteristics
The solar direct transmittance, the solar direct reflectance and the total solar energy transmittance
(solar factor or g-value) shall be determined either:
a) in accordance with the following procedure:
1) The solar direct transmittance and solar direct reflectance of one sample of basic glass
ceramics product shall be determined in accordance with EN 410 and Annex B. The exact
thickness of the glass shall be measured.
2) The solar direct transmittance, the solar direct reflectance and the total solar energy
transmittance (solar factor or g-value) of any other thickness shall be calculated according to
EN 410.
3) The tool used to calculate the solar direct transmittance, the solar direct reflectance and the
total solar energy transmittance (solar factor or g-value) shall be validated.
b) or measured following EN 410 and Annex B.
The tolerances on the calculated solar energy characteristics are given in Annex B.
4.2.2.15 Durability / Conformity with the definition of basic glass ceramics products
Products shall conform to the definition, to the manufacturer product description and fulfil the
requirements of basic glass ceramics products as defined in prEN 1748-2-1:2017.
The type testing concerns the product aspects as listed in Table 2.
Table 2 — Product aspects to be checked if product belongs to the group basic glass ceramics
products
Product aspect Requirement Number of
samples
Chemical composition prEN 1748–2-1:2017, Clause 4 1
Thickness prEN 1748–2-1:2017, 6.2 1
Light transmittance (distinction clear glass from tinted prEN 1748–2-1:2017, 5.3 1
glass)
When products conform to the definition of basic glass ceramics as in 4.1, the other characteristics’
performances in 4.2 are ensured during an economically reasonable working life.
The durability / conformity of basic glass ceramics products, including their characteristics, is ensured
by the following:
— compliance with this standard;
— compliance with instructions from the glass product manufacturer or supplier.
The manufacturer shall supply specific installation instructions or make reference to appropriate
technical specifications.
NOTE The durability of glass products depends also on:
— building and construction movements due to various actions;
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— building and construction vibrations due to various actions;
— deflection and racking of the glass support due to various actions;
— glass support design (e.g. drainage of infiltrated water in the rebate, prevention of direct contact between
glass support members and glass);
— accuracy of glass support and glass support member dimensions;
— quality of the assembling of glass support members up to a glass support;
— quality of installation of the glass support into or onto the buildings or constructions;
— glass support expansion due to adsorbed moisture from the air or other sources;
— the quality of installation of the glass product into or onto its support.
4.3 Characteristics other than listed in 4.2
Optical and visual characteristics as well as dimensional tolerances shall comply with
prEN 1748-2-1:2017.
4.4 Dangerous substances
National regulations on dangerous substances may require verification and declaration on release, and
sometimes content, when construction products covered by this standard are placed on those markets.
In the absence of European harmonized test methods, verification and declaration on release/content
should be done taking into account national provisions in the place of use.
NOTE An informative database covering European and national provisions on dangerous substances is
available at the Construction website on EUROPA accessed through: http://ec.europa.eu/growth/tools-
databases/cp-ds/
5 Assessment and verification of constancy of performance – AVCP
5.1 General
The compliance of basic glass ceramics products with the requirements of this standard and with the
performances declared by the manufacturer in the declaration of performances shall be demonstrated
by:
1) Determination of the product type;
2) Factory production control by the manufacturer, including product assessment;
This shall include the following:
a) inspection of samples taken at the factory in accordance with a prescribed test plan;
b) initial inspection of the factory and of factory production control;
c) continuous surveillance and assessment of the factory production control.
The manufacturer shall always retain the overall control and shall have the necessary means to take
responsibility for the conformity of the product with its declared performance(s).
NOTE The assignment of tasks to the notified body(ies) and the manufacturer is shown in Tables ZA.3.1 to
ZA.3.3.
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