EN 14321-2:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Glass in building - Thermally toughened alkaline earth silicate safety glass - Part 2: Evaluation of conformity/Product standardSteklo v gradbeništvu – Kaljeno zemljoalkalijsko silikatno varnostno steklo – 2. del: Ocena skladnosti/standard za izdelekVerre dans la construction - Verre de silicate alcalino-terreux de sécurité trempé thermiquement - Partie 2 : Evaluation de la conformité/Norme produitGlas im Bauwesen - Thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 2: Konformitätsbewertung/ProduktnormTa slovenski standard je istoveten z:EN 14321-2:2005SIST EN 14321-2:2006en81.040.20ICS:SLOVENSKI
STANDARDSIST EN 14321-2:200601-februar-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14321-2August 2005ICS 81.040.20English versionGlass in building - Thermally toughened alkaline earth silicatesafety glass - Part 2: Evaluation of conformity/Product standardVerre dans la construction - Verre alcalinoterreux desécurité trempé thermiquement - Partie 2 : Evaluation de laconformité/Norme produitGlas im Bauwesen - Thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 2:Konformitätsbewertung/ProduktnormThis European Standard was approved by CEN on 27 June 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14321-2:2005: E

Factory production control.17 Annex B (informative)
Tests for factory production control.23 Annex C (informative)
Provisions for voluntary involvement of third party(ies).25 Annex ZA (normative)
Clauses of this European Standard addressing the provisions of EU Construction Products Directive.26 Bibliography.36

1 Scope This European Standard covers the evaluation of conformity and the factory production control of flat thermally toughened alkaline earth silicate safety glass for use in buildings.
NOTE 1 This also includes requirements subject to regulation.
NOTE 2 For glass products with electrical wiring or connections for e.g. alarm or heating purposes, this European Standard covers only wiring subject for electrical potential difference to earth less than 50 V a.c. or less than 75 V d.c. 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 edition of the referenced document (including any amendments) applies. EN 356, Glass in Building
– Security glazing
– Testing and classification of resistance against manual attack. EN 410, Glass in Building
– Determination of luminous and solar characteristics of glazing. EN 673, Glass in Building
– Determination of thermal transmittance (U-value) – Calculation method.
EN 1063, Glass in Building
– Security glazing – Testing and classification of resistance against bullet attack. EN 1096-1, Glass in Building – Coated glass – Part 1: Definitions and classification EN 1096-2, Glass in building – Coated glass – Part 2:
Requirements and test methods for class A, B and S coatings. EN 1096-3, Glass in building – Coated glass – Part 3:
Requirements and test methods for class C and D coatings. EN 12600, Glass in Building – Pendulum test – Impact test method and classification for flat glass. EN 12758, Glass in Building – Glazing and airborne sound insulation – Product descriptions and determination of properties. EN 12898, Glass in Building – Determination of the emissivity. prEN 13474 (all parts), Glass in building – Design of glass panes. EN 13501-1, Fire classification of construction products and building elements – Part 1: Classification using test data from reaction to fire tests. EN 13501-2, Fire classification of construction products and building elements – Part 2: Classification using test data from fire resistance tests. prEN 13501-5, Fire classification of construction products and building elements – Part 5: Classification using test data from fire exposure to roof
tests. EN 13541, Glass in Building – Security glazing – Testing and classification of resistance against explosion pressure. EN 14178-1, Glass in Building – Basic alkaline earth silicate glass products – Part 1: Float glass. EN 14321-1:2005, Glass in Building – Thermally toughened alkaline earth silicate safety glass – Part 1: Definition and description.

3.3 product description document that details the relevant parameters, e.g. process conditions, structure, etc., for defining a product that complies with the standard. It includes specific reference(s) to characteristics that are modified by the production process. 3.4 significant change variation in performance beyond the permitted tolerance for the characteristic. 4 Requirements 4.1 Product description For conformity purposes the thermally toughened alkaline earth silicate glass 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 thermally toughened glass manufacturer or his agent except in the case of regulatory requirements. The description shall contain at least a normative part. The description may also contain an informative part, when the manufacturer foresees further development of the product. The normative part of the description shall contain the following minimum information:  a reference to EN 14321 Parts 1 and 2 and all other standards with which the manufacturer claims compliance.  the radiometric properties and durability of coated glass, i.e. coated glass that conforms with EN 1096-1, EN 1096-2, EN 1096-3, when those properties are changed, intentionally or unintentionally, by the thermal toughening process.
The definition of product families shall be consistent with the normative part of the product description. The substitution of materials shall maintain the conformity with the product description. The substituting material can be added to the product family and also the product description when compliance has been demonstrated.

Since the majority of the characteristics of Table 1 are not changed significantly by the thermal toughening process they shall be used for thermally toughened alkaline earth silicate safety glass. The exceptions shall be the characteristic bending strength (fg,k) and the resistance against sudden temperature changes and temperature differentials.

Table 1 — Information on the characteristics of basic alkaline earth silicate glass, according to EN 14178-1, used for the production of thermally toughened alkaline earth silicate safety glass
Characteristic
Symbol
Unit
- density - hardness - Young's modulus - Poisson's ratio - Characteristic bending strength - Resistance against sudden temperature changes and temperature differentials
- Specific heat capacity - Coefficient of linear expansion - Thermal conductivity (for U-value) - Mean refractive index to visible radiation - Emissivity - Light transmittance - Solar direct transmittance - Total energy transmittance
ρ HK0,1/20 E µ fg,k c α λ n ε τv τe g
kg/m³ GPa Pa Dimensionless Pa K J/(kg.K) K-1 W/(m.K) Dimensionless Dimensionless Dimensionless Dimensionless Dimensionless
If some coatings, i.e. coated glass conforming with the EN 1096 series, when thermally toughened change their radiometric properties the manufacturer shall refer to the following for the determination of the appropriate characteristics, etc.:  4.3.2.12 for the emissivity;  4.3.2.13 for the light transmittance and reflectance;  4.3.2.14 for the solar energy transmittance;  EN 1096-2 for the durability of A, B and S coatings;  EN 1096-3 for the durability of C and D coatings. 4.3.2 Determination of characteristics of thermally toughened alkaline earth silicate safety glass products 4.3.2.1 General If the thermally toughened glass 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

The manufactured or supplied thickness of thermally toughened alkaline earth silicate safety glass shall conform to the ordered thickness.

Subject to 5.2.1 the information supplied about the radiation properties of the incoming glass may be used if the thermal toughening process does not alter the values. 4.3.2.14 Energy conservation and heat retention - Radiation properties: Solar energy characteristics The solar energy transmittance and reflectance shall be determined in accordance with EN 410.
Subject to 5.2.1 the information supplied about the radiation properties of the incoming glass can be used if the thermal toughening process does not alter the values. 4.4 Durability When products conform to the definition of thermally toughened alkaline earth silicate glass as 4.2 then the characteristics’ performances in 4.3.2 are ensured during an economically reasonable working life. The durability of glass products including their characteristics, shall be ensured by the following:  Compliance with this European 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 on:
 building and construction movements due to various actions;  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;

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. 2) Initial type testing of the product; Note There may be a need to involve a third party, with 1b, 1c, and/or 2, for the purpose of regulatory marking (see Annex ZA). 5.2 Initial type testing of the product (see 5.1, 2) 5.2.1 General All the product’s characteristics shall be initial type tested to verify they are in conformity with the requirements of this document. In addition instead of performing any actual testing, initial type testing may make use of:  generally accepted and/or conventional and/or standardised values, in the Clause 2 referenced standards, or in publications that are referred to in these standards;  standardised calculation methods and recognised calculation methods in
Clause 2 referenced standards, or in publications that are referred to in these standards;  test report(s) on the basis of 5.2.1.2 when made available except for the characteristics listed in 5.2.2.  where components are used whose characteristics have already been determined, by the component manufacturer, on the basis of conformity with other product standards, these characteristics need not be reassessed providing they remain unchanged by the manufacturing process;  release of dangerous substances may be assessed indirectly by controlling the content of the substance concerned;

NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). When actual testing is required then the Initial Type Testing (ITT) shall be undertaken on a sample representative of the product taken from direct production or a prototype, any plant and/ or line. Whenever a change occurs in the raw material or the production process (subject to the definition of the family), which would change significantly one or more of the characteristics, the type tests shall be repeated for the appropriate characteristics. 5.2.1.1 Multiple lines/sites If a manufacturer operates one and/or more lines and/or sites, the following can reduce the requirement for multiple Initial Type Testing (ITT): i) The manufacturers’ technical file for a product shall specifically cover all sites and/or lines of the same manufacturer1, ii) The manufacturer shall establish a direct relationship between production control, initial type testing and on-going internal audit testing, iii) The manufacturer has a responsible individual designated to ensure product compliance based on:  The operation of a consistent Factory Production Control system on all applicable sites and/or lines,  The manufacturer having obtained evidence that shows the product to be consistent, with respect to both product characteristics and intended use characteristics,  The manufacturer has in place an internal auditing scheme, including product consistency. 5.2.1.2 Historic Data Tests previously performed in accordance with the provisions of this document (same product, same characteristic(s), same or more onerous test method, sampling method and attestation of conformity) may be taken into account. 5.2.2 Initial type testing of thermally toughened alkaline earth silicate safety glass 5.2.2.1 General To establish if a product conforms to the definition of thermally toughened alkaline earth silicate safety glass, initial type testing shall consist of: a) mechanical strength measurement in accordance with EN 14321-1; b) fragmentation test in accordance with EN 14321-1
1 The terms ‘manufacturer’ and ‘producer’ are understood as being synonyms (see CPD working document NB-CPD/02/019-issued 24 April 2002 – page1)

The ‘simplest’ type of edge work specified in the manufacturers production control documentation shall be used. However, if an arrissed edge is used then all other types of edge working are deemed to satisfy. The number of test specimens is as follows: a) For mechanical strength measurement they are given in Table 2a for float glass, Table 2b for coated float glass and Table 2c for enamelled float glass. b) For fragmentation 5 test specimens per thickness are required. Table 2a — Number of test specimens distributed over the product thickness range
Product thickness range
Number of test specimens for the mechanical strength measurement – minimum ≥ 2 – first after minimum ≥ 2 – centre of range ≥ 2 – last before maximum ≥ 2 – maximum ≥ 2 TOTAL ≥ 10 NOTE When the production range consists of: - two thicknesses, the distribution shall be as equal as possible - a single thickness, all specimens are of the same thickness

Table 2 b: Number of test specimens of coated float glass, distributed over the product thickness range Emissivity ε of incoming glass product Product thickness range Number of specimens for the mechanical strength measurement 1 ≥ ε > 0,25 Minimum Middle Maximum ≥ 2 ≥ 2 ≥ 2 Total
(min.10) 0,25 ≥ ε > 0,1 Minimum Middle Maximum ≥ 2 ≥ 2 ≥ 2 Total
(min.10)
0,1 ≥ ε Minimum Middle Maximum ≥ 2 ≥ 2 ≥ 2 Total
(min.10) Note 1: Tests according to this table are valid for all coated glasses within the respective emissivity ranges Note 2: Half number of test specimen shall be tested with the coated side in tension and the other half with the uncoated side in tension
Table 2 c: Number of test specimens of enamelled float glass, distributed over the product thickness range Type of surface design Product thickness range Number of specimens for the mechanical strength measurement
Fully enamelled Minimum
≥ 10
Note 1: This table covers all enamelled designs and all produced thicknesses Note 2: Mechanical test undertaken with enamelled surface in tension
NOTE Strength measurements outcomes are expressed in force per unit of area and independent from the thickness. Therefore strength measurements may be performed on a collection of test specimens with different thickness. 5.2.2.3 Test results a) When the mechanical strength is measured, no measured value shall be below that given in Clause 9 of EN 14321-1. However, if one value falls below then the manufacturer shall ensure that the results relate to a 5 % probability of breakage at the lower limit of the 95 % confidence interval.
b) In the fragmentation test, no test specimen shall exhibit a fragmentation assessment that does not meet
8.4 of EN 14321-1:2005.
All elements, requirements and provisions adopted by the manufacturer shall be documented in a systematic manner in the form of written policies and procedures. This production control system documentation shall ensure a common understanding of quality assurance and enable the achievement of the required product characteristics and the effective operation of the production control system to be checked. Factory production shall be according to Annex A of this document. NOTE 1 A factory production control system similar to EN ISO 9001 made product specific to this document is deemed to satisfy the requirements of this clause. NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). Annex A of this document also summarises the tests that shall be carried out by the manufacturer as part of the production control in the factory, and as further testing of samples taken at the factory in accordance with a prescribed test plan. If the factory production control includes the optical pre-stress measurement for control purposes, the method shall be correlated. Therefore, prior to any initial type test on mechanical strength/fragmentation according to 5.2.2.1, all test specimens shall be measured to determine their optical pre-stress. Outcomes shall be used as reference values during factory production control. 5.4 Initial inspection of factory and of factory production control (see 5.1, 1d) The initial inspection of the factory and of the factory production control shall be limited to the parameters listed in Table 3 in conjunction with Annex A.
NOTE There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA).

Nr
Characteristic
Interested parameter related to the characteristic
For details, refer to
A
Resistance to fire Reaction to fire External fire behaviour
- checking incoming glass - checking process control - product control after toughening - labelling outgoing glass product
Annex A
B
Release of dangerous substances
- checking incoming materials
Annex A
C
Bullet resistance Explosion resistance Burglar resistance Pendulum body impact resistance Resistance against sudden temperature Changes and temperature differentials Wind, snow, permanent and imposed load resistance of the glass unit
- checking incoming glass - checking process control - product control after toughening - labelling outgoing glass product
Annex A
D
Direct airborne sound reduction Thermal properties Radiation properties: – light transmittance and reflection – solar energy characteristic
- checking incoming glass - checking process control - product control after toughening
- labelling outgoing product
Annex A
5.5 Continuous surveillance and assessment of the factory production control (see 5.1, 1c) The continuous surveillance and assessment of the factory production control shall cover the parameters listed in Table 3 in conjunction with Annex A.
NOTE There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). The frequency of production surveillance shall be twice per year for new production facilities or for facilities that do not already have an established factory production control system in accordance with this document.
When assessment of FPC fails to identify major non-conformances during four successive assessments, the frequency may be reduced to once a year
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