Glass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description

This European Standard specifies the heat soak process system together with tolerances flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat soaked thermally toughened alkaline earth silicate safety glass for use in buildings. Information on curved heat soak thermally toughened alkaline earth silicate safety glass is given in Annex B, but this product does not form part of this document.
Other requirements, not specified in this document, can apply to heat soaked thermally toughened alkaline earth silicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard EN 15682-2. In this case, heat soaked thermally toughened alkaline earth silicate glass does not lose its mechanical or thermal characteristics.

Glas im Bauwesen - Heißgelagertes thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 1: Definition und Beschreibung

Diese Europäische Norm legt das Heißlagerungsprozess-System sowie die Toleranzen der Geradheit, Kanten-bearbeitung, das Bruchverhalten und physikalische und mechanische Eigenschaften von flachem heißgelagertem thermisch vorgespanntem Erdalkali-Silicat-Einscheiben¬sicherheitsglas für die Verwendung im Bauwesen fest. Anhang B enthält Angaben zu gebogenem heißgelagertem thermisch vorgespanntem Erdalkali-Silicat-Einscheiben¬sicherheitsglas, dieses Produkt ist jedoch nicht Bestandteil dieses Dokuments.
An heißgelagerte thermisch vorgespannte Erdalkali-Silicat-Einscheibensicherheitsgläser können andere Anforderungen, die in diesem Dokument nicht beschrieben sind, gestellt werden, wenn sie Bestandteil von Kombinationen sind, wie z. B. Verbundglas oder Isolierglas, sind oder wenn sie weiterverarbeitet, z. B. beschichtet werden. Die zusätzlichen Anforderungen sind in der zutreffenden Produktnorm, EN 15682 2, festgelegt. In diesem Fall wird heißgelagertes thermisch vor¬gespanntes Erdalkali-Silicat-Einscheibensicherheitsglas seine mechanischen oder thermischen Eigenschaften nicht verlieren.

Verre dans la construction - Verre de silicate alcalinoterreux de sécurité trempé et traité Heat Soak - Partie 1 : Définition et description

La présente Norme européenne spécifie le système fonctionnel de stabilisation thermique ainsi que les tolérances, la planéité, la finition des chants, la fragmentation et les caractéristiques physiques et mécaniques du verre plat monolithique de silicate alcalino-terreux de sécurité trempé et traité Heat Soak dans la construction. L'Annexe B fournit des informations relatives au verre bombé de silicate alcalino-terreux de sécurité trempé et traité Heat Soak, mais ce produit ne fait pas partie de la présente norme.
D'autres exigences, non spécifiées dans le présent document, peuvent s'appliquer au verre de silicate alcalino-terreux de sécurité trempé et traité Heat Soak intégré dans des ensembles, par exemple du verre feuilleté ou des ensembles isolants préfabriqués scellés ou qui subit un traitement supplémentaire, par exemple une couche. Les exigences additionnelles sont spécifiées dans la norme de produit correspondante, EN 15682-2.  Dans ce cas, le verre de silicate alcalino-terreux trempé et traité Heat Soak ne perd pas ses caractéristiques mécaniques ou thermiques.

Steklo v gradbeništvu - HS-preskus kaljenega zemljoalkalijskega silikatnega varnostnega stekla - 1. del: Definicije in opis

Ta evropski standard določa sistem vročinske obdelave (HS) s toleranco, ploskostjo, obdelavo robov, drobljenjem ter fizičnimi in mehanskimi lastnostmi monolitnega ploskega HS-preskušenega kaljenega zemljoalkalijskega silikatnega varnostnega stekla, ki se uporablja v gradbeništvu. Informacije o ukrivljenem HS-preskušenem kaljenem zemljoalkalijskem silikatnem varnostnem steklu so podane v dodatku B, vendar ta izdelek ni del tega dokumenta. Druge zahteve, ki niso določene v tem dokumentu, se lahko uporabljajo za HS-preskušeno kaljeno zemljoalkalijsko silikatno varnostno steklo, ki je vgrajeno v sestave, npr. lepljeno steklo ali izolacijsko steklo, ali pa ga je treba dodatno obdelati, npr. z nanosi. Dodatne zahteve so določene v ustreznem standardu za izdelek EN 15682-2. HS-preskušeno kaljeno zemljoalkalijsko silikatno steklo v tem primeru ne izgubi mehanskih ali toplotnih lastnosti.

General Information

Status
Published
Publication Date
30-Jul-2013
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
04-Mar-2019
Completion Date
04-Mar-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - HS-preskus kaljenega zemljoalkalijskega silikatnega varnostnega stekla - 1. del: Definicije in opisGlas im Bauwesen - Heißgelagertes thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 1: Definition und BeschreibungVerre dans la construction - Verre de silicate alcalinoterreux de sécurité trempé et traité Heat Soak - Partie 1 : Définition et descriptionGlass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 15682-1:2013SIST EN 15682-1:2013en,fr,de01-november-2013SIST EN 15682-1:2013SLOVENSKI

STANDARD
SIST EN 15682-1:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15682-1
July 2013 ICS 81.040.20 English Version

Glass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description

Verre dans la construction - Verre de silicate alcalinoterreuxde sécurité trempé et traité Heat Soak - Partie 1 : Définition et description

Glas im Bauwesen - Heißgelagertes thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 1: Definition und Beschreibung This European Standard was approved by CEN on 30 May 2013.

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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15682-1:2013: ESIST EN 15682-1:2013

EN 15682-1:2013 (E) 2 Contents Page

Foreword ..............................................................................................................................................................4 Introduction .........................................................................................................................................................5 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................6 3 Terms and definitions ...........................................................................................................................6 4 Glass products .......................................................................................................................................7 5 Manufacturing processes .....................................................................................................................7 5.1 General ....................................................................................................................................................7 5.2 Toughening process .............................................................................................................................7 5.3 Heat soak process cycle .......................................................................................................................7 5.3.1 General ....................................................................................................................................................7 5.3.2 Heating phase ........................................................................................................................................8 5.3.3 Holding phase ........................................................................................................................................8 5.3.4 Cooling phase ........................................................................................................................................8 6 Heat soak process system ....................................................................................................................9 6.1 General ....................................................................................................................................................9 6.2 Oven ........................................................................................................................................................9 6.3 Glass support .........................................................................................................................................9 6.4 Glass separation ....................................................................................................................................9 6.5 Calibration ........................................................................................................................................... 11 7 Fracture characteristics ..................................................................................................................... 11 8 Dimensions and tolerances ............................................................................................................... 11 8.1 Nominal thickness and thickness tolerances .................................................................................. 11 8.2 Width and length (sizes) .................................................................................................................... 11 8.2.1 General ................................................................................................................................................. 11 8.2.2 Maximum and minimum sizes ........................................................................................................... 12 8.2.3 Tolerances and squareness .............................................................................................................. 12 8.2.4 Edge deformation produced by vertical toughening ...................................................................... 13 8.3 Flatness ............................................................................................................................................... 13 8.3.1 General ................................................................................................................................................. 13 8.3.2 Measurement of overall bow ............................................................................................................. 14 8.3.3 Measurement of local bow ................................................................................................................. 15 8.3.4 Limitation on overall and local bow .................................................................................................. 15 9 Edge work, holes, notches and cut-outs .......................................................................................... 16 9.1 Warning ................................................................................................................................................ 16 9.2 Edge working of glass for toughening ............................................................................................. 16 9.3 Profiled edges ..................................................................................................................................... 16 9.4 Round holes ........................................................................................................................................ 17 9.4.1 General ................................................................................................................................................. 17 9.4.2 Diameter of holes ................................................................................................................................ 17 9.4.3 Limitations on position of holes ....................................................................................................... 17 9.4.4 Tolerances on hole diameters ........................................................................................................... 18 9.4.5 Tolerances on position of holes ........................................................................................................ 19 9.5 Notches and cut-outs ......................................................................................................................... 19 9.6 Shaped panes ...................................................................................................................................... 20 SIST EN 15682-1:2013

EN 15682-1:2013 (E) 3 10 Fragmentation test .............................................................................................................................. 20 10.1 General ................................................................................................................................................. 20 10.2 Dimensions and number of test specimens ..................................................................................... 20 10.3 Test procedure ..................................................................................................................................... 20 10.4 Assessment of fragmentation ............................................................................................................ 21 10.5 Minimum values from the particle count .......................................................................................... 22 10.6 Selection of the longest particle ........................................................................................................ 23 10.7 Maximum length of longest particle .................................................................................................. 23 11 Other physical characteristics ........................................................................................................... 23 11.1 Optical distortion ................................................................................................................................. 23 11.1.1 Heat soaked thermally toughened alkaline earth silicate safety glass produced by vertical toughening ........................................................................................................................................... 23 11.1.2 Heat soaked thermally toughened alkaline earth silicate safety glass produced by horizontal toughening ......................................................................................................................... 23 11.2 Anisotropy (iridescence) .................................................................................................................... 23 11.3 Thermal durability ............................................................................................................................... 23 11.4 Mechanical strength ............................................................................................................................ 23 11.5 Classification of performance under accidental human impact..................................................... 24 12 Marking ................................................................................................................................................. 24 Annex A (normative)

Heat soak process system calibration test ................................................................ 25 A.1 Calibration criteria ............................................................................................................................... 25 A.2 Loading of oven and position for glass surface temperature measurement ................................ 25 A.3 Procedure ............................................................................................................................................. 26 A.4 Records ................................................................................................................................................ 27 A.5 Interpretation of the calibration test .................................................................................................. 27 Annex B (informative)

Curved heat soaked thermally toughened alkaline earth silicate safety glass ...................................................................................................................................................... 36 Annex C (informative)

Examples of particle count ........................................................................................ 37 Bibliography ...................................................................................................................................................... 40

SIST EN 15682-1:2013

EN 15682-1:2013 (E) 4 Foreword This document (EN 15682-1:2013) has been prepared by Technical Committee CEN/TC 129 “Glass in Building”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 15682 is composed of the following parts: — EN 15682-1, Glass in building — Heat soaked thermally toughened alkaline earth silicate safety glass — Part 1: Definition and description — EN 15682-2, Glass in building — Heat soaked thermally toughened alkaline earth silicate safety glass — Part 2: Evaluation of conformity/Product standard According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 5 Introduction Heat soaked thermally toughened alkaline earth silicate safety glass has a safer breakage behaviour when compared with annealed glass. It also has a known level of residual risk of spontaneous breakage arising from the possible presence of critical nickel sulphide (NiS) inclusions in the thermally toughened alkaline earth silicate glass. NOTE 1 In this case it is about a statistical mean out of a big quantity of glass. It is impossible to determine separated subjects from it for a building where definitely no “break” produced by NiS occurs. The breaking of glass caused by other influences is not included herewith. When used to offer protection under accidental human impact, heat soaked thermally toughened alkaline earth silicate safety glass also should be classified according to EN 12600. NOTE 2 CEN/TC 129/WG 8 is producing standards for the determination of the design strength of glass and is preparing a design method. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 6 1 Scope This European Standard specifies the heat soak process system together with tolerances flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat soaked thermally toughened alkaline earth silicate safety glass for use in buildings. Information on curved heat soak thermally toughened alkaline earth silicate safety glass is given in Annex B, but this product does not form part of this document. Other requirements, not specified in this document, can apply to heat soaked thermally toughened alkaline earth silicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard EN 15682-2. In this case, heat soaked thermally toughened alkaline earth silicate glass does not lose its mechanical or thermal characteristics. 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 14178-1, Glass in building - Basic alkaline earth silicate glass products - Part 1: Float glass 3 Terms and definitions For the purposes of this document, the following terms and definitions apply: 3.1 heat soaked thermally toughened alkaline earth silicate safety glass glass within which a permanent surface compressive stress has been induced in order to give it greatly increased resistance to mechanical and thermal stress and prescribed fragmentation characteristics and which has a known level of residual risk of spontaneous breakage due to the presence of critical nickel sulphide (NiS) inclusions 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 do not depend on the size of the pane. 3.2 residual risk statistical risk of spontaneous breakage of heat soaked thermally toughened alkaline earth silicate safety glass due to the presence of critical nickel sulphide inclusions 3.3 flat heat soaked thermally toughened alkaline earth silicate safety glass heat soaked thermally toughened alkaline earth silicate safety glass that has not been given a previously determined profile during manufacture 3.4 heat soaked enamelled thermally toughened alkaline earth silicate safety glass heat soaked thermally toughened alkaline earth silicate safety glass which has a ceramic frit fired into the surface during the toughening process becoming an integral part of the glass after toughening 3.5 horizontal toughening process in which the glass is supported on horizontal rollers SIST EN 15682-1:2013

EN 15682-1:2013 (E) 7 3.6 vertical toughening process in which the glass is suspended by tongs 3.7 heat soak process process which consists of a heating phase, a holding phase and a cooling phase, which in average should result in no more than one NiS related breakage per 400 tonnes of heat soaked thermally toughened alkaline earth silicate safety glass 4 Glass products Heat soaked thermally toughened alkaline earth silicate safety glass is made from a monolithic alkaline earth silicate glass product generally corresponding to one of the following standards: — coated glass according to EN 1096-1; — basic alkaline earth silicate glass according to EN 14178-1. 5 Manufacturing processes 5.1 General Heat soaked thermally toughened alkaline earth silicate safety glass is manufactured as follows: Basic alkaline earth silicate glass products (see Clause 4) are cut to size, shaped and edge worked (see Clause 9). The prepared glass panes are then thermally toughened (see 5.2). The thermally toughened panes are then subjected to the heat soak process cycle. After manufacture the heat soaked thermally toughened alkaline earth silicate glass shall comply with the fragmentation test (see Clause 10) and mechanical strength requirement (see 11.4). 5.2 Toughening process The cut, shaped and edge worked glasses are toughened. The horizontal or vertical toughened glass shall comply with the flatness criteria (see 8.3). The thermally toughened alkaline earth silicate glass shall have a level of fragmentation that will ensure that after the glass has been through the heat soak process, and subsequently tested to the fragmentation test (see Clause 10), it shall comply with 10.5. 5.3 Heat soak process cycle 5.3.1 General The heat soak process cycle consists of a heating phase, a holding phase and a cooling phase (see Figure 1). SIST EN 15682-1:2013

EN 15682-1:2013 (E) 8

Key T glass temperature at any point, °C d ambient temperature t time, h a heating phase 1 first glass to reach 280 °C b holding phase 2 last glass to reach 280 °C c cooling phase Figure 1 — Heat soak process cycle 5.3.2 Heating phase The heating phase commences with all the glasses at ambient temperature and concludes when the surface temperature of the last glass reaches 280 °C. The time to reach this temperature is defined in the calibration process. This time will be dependent on the size of the oven, the amount of glass to be treated, the separation between glasses and the heating system capacity. The glass separation and rate of heating should be controlled to minimise the risk of glass breakage as a result of thermal stress. To facilitate economic heating, the air temperature within the oven may exceed 320 °C. However, the glass surface temperature shall not be allowed to exceed 320 °C. The period of glass surface temperature in excess of 300 °C shall be minimised. When the temperature of the glass exceeds 300 °C, care should be taken to ensure that the properties of the heat soaked thermally toughened alkaline earth silicate safety glass are not significantly altered, i.e. they continue to meet Clause 10. 5.3.3 Holding phase The holding phase commences when the surface temperature of all the glasses has reached a temperature of 280 °C. The duration of the holding phase is minimum 2 h. Precise oven control is necessary in order to ensure that the glass surface temperature shall be maintained in the range of 290 °C ± 10 °C during the holding phase. 5.3.4 Cooling phase The cooling phase commences when the last glass to reach 280 °C has completed its holding phase, i.e. been held for two hours at 290 °C ± 10 °C. During this phase the glass temperature shall be brought down to ambient temperature. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 9 The cooling phase can be concluded when the air temperature in the oven reaches 70 °C. The rate of cooling should be controlled to minimise the risk of glass breakage as a result of thermal stress. 6 Heat soak process system 6.1 General The heat soak process system consists of: — the oven (see 6.2); — the glass support (see 6.3); — separation system (see 6.4). The oven shall be calibrated (see 6.5 and Annex A), and this determines the method of operation of the heat soak process system during manufacture of heat soaked thermally toughened alkaline earth silicate safety glass. 6.2 Oven The oven shall be heated by convection and shall allow an unhindered air circulation around each glass pane. In the event of glass breakage the airflow shall not be hindered. The airflow in the oven shall be led parallel to the glass surfaces. The openings for the air ingress/egress should be designed to ensure that fragments of broken glass do not cause blockages. 6.3 Glass support Glasses may be supported vertically or horizontally. The glasses shall not be fixed or clamped, they have to be supported to allow free movement. NOTE Vertically means true vertical or up to 15° either side of true vertical. The distance between glasses affects the airflow, heat exchange and the heating time. Glass to glass contact shall not be allowed. 6.4 Glass separation The glasses shall be separated in a manner that does not hinder the airflow. The separators shall also not hinder the airflow, e.g. see Figure 2. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 10 Dimensions in millimetres

Figure 2 — Example of a vertical glass support The minimum separation of the glasses shall be determined during the calibration of the oven (see 6.5 and Annex A). Generally, a minimum separation of 20 mm is recommended. See Figure 3. NOTE If glasses of very different sizes are put on the same stillage, they will require greater separation in order to prevent glass breakage when the furnace is opened after the heat soak process. The same applies to glasses with holes, notches and cut-outs. Dimensions in millimetres

Figure 3 — Recommend separation between glass The positioning of the separators, material of the manufacture and their shape shall be specified during the calibration test of the oven and shall be reproduced during the manufacturing process. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 11 6.5 Calibration The heat soak system, e.g. oven, glass separation, separators, etc., shall be calibrated (see Annex A). The calibration shall determine the heating phase of the process, glass separation distance, the positioning, material and shape of separators, the type and positioning of stillage(s), and define the operating conditions for use during manufacture. 7 Fracture characteristics In the event of breakage, heat soaked thermally toughened alkaline earth silicate safety glass fractures into numerous small pieces, the edges of which are generally blunt. NOTE Fragmentation in service does not always correspond to that described in Clause 10, due to restraint from fixing or reprocessing (e.g. laminating), or due to the cause of fracture. 8 Dimensions and tolerances 8.1 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 Nominal thickness

d Thickness tolerances

4 5 6 8 10 12 15 ±0,2 ±0,2 ±0,2 ±0,3 ±0,3 ±0,3 ±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, and away from the area of any tong marks (see Figure 6), which may be present. 8.2 Width and length (sizes) 8.2.1 General When heat soaked thermally toughened alkaline earth silicate 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 4. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 12

Figure 4 — Examples of width, B, and length, H, relative to the pane shape 8.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer shall be consulted. 8.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the finished pane shall not be larger than a prescribed rectangle resulting from the nominal dimensions increased by the tolerance, t, or smaller than a prescribed rectangle reduced by the tolerance, t. The sides of the prescribed rectangles are parallel to one another and these rectangles shall have a common centre (see Figure 5). The limits of squareness shall be determined by the prescribed rectangles. Tolerances are given in Table 2.

Figure 5 — Tolerance limits for dimensions of rectangular panes SIST EN 15682-1:2013

EN 15682-1:2013 (E) 13 Table 2 — Tolerances on width, B, and length, H Dimensions in millimetres Nominal dimension of side,

B or H Tolerance, t nominal glass thickness,
d ≤ 12 nominal glass thickness,
d > 12 ≤ 2 000 ±2,5 (horizontal toughening)
± 3,0 (vertical toughening) ±3,0 > 2 000 to 3 000

±3,0 ±4,0 > 3 000 ±4,0 ±5,0 8.2.4 Edge deformation produced by vertical toughening The tongs used to suspend the glass during toughening can result in surface depressions, known as tong marks (see Figure 6). The centres of the tong marks may be situated up to a maximum of 20 mm in from the edge. A deformation of the edge less than 2 mm can be produced in the region of the tong mark and there can also be an area of optical distortion. These deformations shall be included in the tolerances in Table 2.

Key 1 deformation 2 up to 20 mm 3 tong mark 4 100 mm radius maximum area of optical distortion Figure 6 — Tong mark deformation 8.3 Flatness 8.3.1 General By the very nature of the toughening process, it is not possible to obtain a product as flat as annealed glass. The difference depends on the nominal thickness, the dimensions and the ratio between the dimensions. Therefore a distortion known as overall bow may occur. There are two kinds of bow (see Figure 7): — overall or general bow; — local bow. SIST EN 15682-1:2013

EN 15682-1:2013 (E) 14 NOTE 1 Overall bow can, in general, be accommodated by the framing system. NOTE 2 Local bow needs to be allowed for in the glazing materials and the weather seals. 8.3.2 Measurement of overall bow The pane of glass shall be placed in a vertical position and supported on its longer side by two load-bearing blocks at the quarter points (see Figure 8). The deformation shall be measured along the edges of the glass

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - HS-preskus kaljenega zemljoalkalijskega silikatnega varnostnega stekla - 1. del: Definicije in opisGlas im Bauwesen - Heißgelagertes thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 1: Definition und BeschreibungVerre dans la construction - Verre de silicate alcalinoterreux de sécurité trempé et traité Heat Soak - Partie 1 : Définition et descriptionGlass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:FprEN 15682-1kSIST FprEN 15682-1:2013en,fr,de01-februar-2013kSIST FprEN 15682-1:2013SLOVENSKI

STANDARD
kSIST FprEN 15682-1:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 15682-1
November 2012 ICS 81.040.20 English Version

Glass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 1: Definition and description

Verre dans la construction - Verre de silicate alcalinoterreuxde sécurité trempé et traité Heat Soak - Partie 1 : Définition et description

Glas im Bauwesen - Heißgelagertes thermisch vorgespanntes Erdalkali-Silicat-Einscheibensicherheitsglas - Teil 1: Definition und Beschreibung This draft European Standard is submitted to CEN members for unique acceptance procedure. 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, 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
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 15682-1:2012: EkSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 2 Contents Page Foreword ..............................................................................................................................................................4Introduction .........................................................................................................................................................51Scope ......................................................................................................................................................62Normative references ............................................................................................................................63Terms and definitions ...........................................................................................................................64Glass products .......................................................................................................................................75Manufacturing processes .....................................................................................................................75.1General ....................................................................................................................................................75.2Toughening process .............................................................................................................................75.3Heat soak process cycle .......................................................................................................................75.3.1General ....................................................................................................................................................75.3.2Heating phase ........................................................................................................................................85.3.3Holding phase ........................................................................................................................................85.3.4Cooling phase ........................................................................................................................................86Heat soak process system ....................................................................................................................96.1General ....................................................................................................................................................96.2Oven ........................................................................................................................................................96.3Glass support .........................................................................................................................................96.4Glass separation ....................................................................................................................................96.5Calibration ........................................................................................................................................... 117Fracture characteristics ..................................................................................................................... 118Dimensions and tolerances ............................................................................................................... 118.1Nominal thickness and thickness tolerances .................................................................................. 118.2Width and length (sizes) .................................................................................................................... 118.2.1General ................................................................................................................................................. 118.2.2Maximum and minimum sizes ........................................................................................................... 128.2.3Tolerances and squareness .............................................................................................................. 128.2.4Edge deformation produced by vertical toughening ...................................................................... 138.3Flatness ............................................................................................................................................... 138.3.1General ................................................................................................................................................. 138.3.2Measurement of overall bow ............................................................................................................. 148.3.3Measurement of local bow ................................................................................................................. 168.3.4Limitation on overall and local bow .................................................................................................. 169Edge work, holes, notches and cut-outs .......................................................................................... 179.1Warning ................................................................................................................................................ 179.2Edge working of glass for toughening ............................................................................................. 179.3Profiled edges ..................................................................................................................................... 179.4Round holes ........................................................................................................................................ 189.4.1General ................................................................................................................................................. 189.4.2Diameter of holes ................................................................................................................................ 189.4.3Limitations on position of holes ....................................................................................................... 189.4.4Tolerances on hole diameters ........................................................................................................... 199.4.5Tolerances on position of holes ........................................................................................................ 209.5Notches and cut-outs ......................................................................................................................... 209.6Shaped panes ...................................................................................................................................... 2110Fragmentation test.............................................................................................................................. 21kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 3 10.1General ................................................................................................................................................. 2110.2Dimensions and number of test specimens ..................................................................................... 2110.3Test procedure ..................................................................................................................................... 2110.4Assessment of fragmentation ............................................................................................................ 2210.5Minimum values from the particle count .......................................................................................... 2310.6Selection of the longest particle ........................................................................................................ 2410.7Maximum length of longest particle .................................................................................................. 2411Other physical characteristics ........................................................................................................... 2411.1Optical distortion ................................................................................................................................. 2411.1.1Heat soaked thermally toughened alkaline earth silicate safety glass produced by vertical toughening ........................................................................................................................................... 2411.1.2Heat soaked thermally toughened alkaline earth silicate safety glass produced by horizontal toughening ......................................................................................................................... 2411.2Anisotropy (iridescence) .................................................................................................................... 2411.3Thermal durability ............................................................................................................................... 2411.4Mechanical strength ............................................................................................................................ 2411.5Classification of performance under accidental human impact..................................................... 2512Marking ................................................................................................................................................. 25Annex A (normative)

Heat soak process system calibration test ................................................................ 26A.1Calibration criteria ............................................................................................................................... 26A.2Loading of oven and position for glass surface temperature measurement ................................ 26A.3Procedure ............................................................................................................................................. 27A.4Records ................................................................................................................................................ 27A.5Interpretation of the calibration test .................................................................................................. 28Annex B (informative)

Curved heat soaked thermally toughened alkaline earth silicate safety glass ...................................................................................................................................................... 37Annex C (informative)

Examples of particle count ........................................................................................ 38Bibliography ...................................................................................................................................................... 41 kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 4 Foreword This document (FprEN 15682-1:2012) 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 Unique Acceptance Procedure. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 15682 is composed of the following parts:  FprEN 15682-1, Glass in building — Heat soaked thermally toughened alkaline earth silicate safety glass — Part 1: Definition and description;  FprEN 15682-2, Glass in building — Heat soaked thermally toughened alkaline earth silicate safety glass — Part 2: Evaluation of conformity/Product standard.

kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 5 Introduction Heat soaked thermally toughened alkaline earth silicate safety glass has a safer breakage behaviour when compared with annealed glass. It also has a known level of residual risk of spontaneous breakage arising from the possible presence of critical nickel sulphide (NiS) inclusions in the thermally toughened alkaline earth silicate glass. NOTE 1 In this case it is about a statistical mean out of a big quantity of glass. It is impossible to determine separated subjects from it for a building where definitely no "break" produced by NiS occurs. The breaking of glass caused by other influences is not included herewith. When used to offer protection under accidental human impact, heat soaked thermally toughened alkaline earth silicate safety glass also should be classified according to EN 12600. NOTE 2 CEN/TC 129/WG 8 is producing standards for the determination of the design strength of glass and is preparing a design method. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 6 1 Scope This European Standard specifies the heat soak process system together with tolerances flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat soaked thermally toughened alkaline earth silicate safety glass for use in buildings. Information on curved heat soak thermally toughened alkaline earth silicate safety glass is given in Annex B, but this product does not form part of this document. Other requirements, not specified in this document, can apply to heat soaked thermally toughened alkaline earth silicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard FprEN 15682-2:2012; in this case, heat soaked thermally toughened alkaline earth silicate glass does not lose its mechanical or thermal characteristics. 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 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification EN 14178-1, Glass in building — Basic alkaline earth silicate glass products — Part 1: Float glass 3 Terms and definitions For the purposes of this document, the following terms and definitions apply: 3.1 heat soaked thermally toughened alkaline earth silicate safety glass glass within which a permanent surface compressive stress has been induced in order to give it greatly increased resistance to mechanical and thermal stress and prescribed fragmentation characteristics and which has a known level of residual risk of spontaneous breakage due to the presence of critical nickel sulphide (NiS) inclusions 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. 3.2 residual risk statistical risk of spontaneous breakage of heat soaked thermally toughened alkaline earth silicate safety glass due to the presence of critical nickel sulphide inclusions 3.3 flat heat soaked thermally toughened alkaline earth silicate safety glass heat soaked thermally toughened alkaline earth silicate safety glass that has not been given a previously determined profile during manufacture 3.4 heat soaked enamelled thermally toughened alkaline earth silicate safety glass heat soaked thermally toughened alkaline earth silicate safety glass which has a ceramic frit fired into the surface during the toughening process becoming an integral part of the glass after toughening

3.5 horizontal toughening process in which the glass is supported on horizontal rollers kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 7 [SOURCE: EN 12150-1:2000, 3.4] 3.6 vertical toughening process in which the glass is suspended by tongs [SOURCE: EN 12150-1:2000, 3.5] 3.7 heat soaked process process which consists of a heating phase, a holding phase and a cooling phase, which in average should result in no more than one NiS related breakage per 400 tonnes of heat soaked thermally toughened alkaline earth silicate safety glass 4 Glass products Heat soaked thermally toughened alkaline earth silicate safety glass is made from a monolithic alkaline earth silicate glass product generally corresponding to one of the following standards:  coated glass according to EN 1096-1;  basic alkaline earth silicate glass according to EN 14178-1. 5 Manufacturing processes 5.1 General Heat soaked thermally toughened alkaline earth silicate safety glass is manufactured as follows: Basic alkaline earth silicate glass products (see Clause 4) are cut to size, shaped and edge worked (see Clause 9). The prepared glass panes are then thermally toughened (see 5.2). The thermally toughened panes are then subjected to the heat soak process cycle. After manufacture the heat soaked thermally toughened alkaline earth silicate glass shall comply with the fragmentation test (see Clause 10) and mechanical strength requirement (see 11.4). 5.2 Toughening process The cut, shaped and edge worked glasses are toughened. The horizontal or vertical toughened glass shall comply with the flatness criteria (see 8.3). The thermally toughened alkaline earth silicate glass shall have a level of fragmentation that will ensure that after the glass has been through the heat soak process, and subsequently tested to the fragmentation test (see Clause 10), it shall comply with 10.5. 5.3 Heat soak process cycle 5.3.1 General The heat soak process cycle consists of a heating phase, a holding phase and a cooling phase (see Figure1). kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 8

Key T glass temperature at any point, °C t time, h 1 first glass to reach 280 °C 2 last glass to reach 280 °C

d ambient temperature

a heating phase b holding phase c cooling phase Figure 1 — Heat soak process cycle 5.3.2 Heating phase The heating phase commences with all the glasses at ambient temperature and concludes when the surface temperature of the last glass reaches 280 °C. The time to reach this temperature is defined in the calibration process. This time will be dependent on the size of the oven, the amount of glass to be treated, the separation between glasses and the heating system capacity. The glass separation and rate of heating should be controlled to minimise the risk of glass breakage as a result of thermal stress. To facilitate economic heating, the air temperature within the oven may exceed 320 °C. However, the glass surface temperature shall not be allowed to exceed 320 °C. The period of glass surface temperature in excess of 300 °C shall be minimised. When the temperature of the glass exceeds 300 °C, care should be taken to ensure that the properties of the heat soaked thermally toughened alkaline earth silicate safety glass are not significantly altered, i.e. they continue to meet Clause 10. 5.3.3 Holding phase The holding phase commences when the surface temperature of all the glasses has reached a temperature of 280 °C. The duration of the holding phase is minimum 2 h. Precise oven control is necessary in order to ensure that the glass surface temperature shall be maintained in the range of 290 °C ± 10 °C during the holding phase. 5.3.4 Cooling phase The cooling phase commences when the last glass to reach 280 °C has completed its holding phase, i.e. been held for two hours at 290 °C ± 10 °C. During this phase the glass temperature shall be brought down to ambient temperature. The cooling phase can be concluded when the air temperature in the oven reaches 70 °C. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 9 The rate of cooling should be controlled to minimise the risk of glass breakage as a result of thermal stress. 6 Heat soak process system 6.1 General The heat soak process system consists of:  the oven (see 6.2),  the glass support (see 6.3),  separation system (see 6.4). The oven shall be calibrated, see 6.5 and Annex A, and this determines the method of operation of the heat soak process system during manufacture of heat soaked thermally toughened alkaline earth silicate safety glass. 6.2 Oven The oven shall be heated by convection and shall allow an unhindered air circulation around each glass pane. In the event of glass breakage the airflow shall not be hindered. The airflow in the oven shall be led parallel to the glass surfaces. The openings for the air ingress/egress should be designed to ensure that fragments of broken glass do not cause blockages. 6.3 Glass support Glasses may be supported vertically or horizontally. The glasses shall not be fixed or clamped, they have to be supported to allow free movement. NOTE Vertically means true vertical or up to 15° either side of true vertical. The distance between glasses affects the airflow, heat exchange and the heating time. Glass to glass contact shall not be allowed. 6.4 Glass separation The glasses shall be separated in a manner that does not hinder the airflow. The separators shall also not hinder the airflow e.g. see Figure 2. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 10 Dimensions in mm

Figure 2 — Example of a vertical glass support The minimum separation of the glasses shall be determined during the calibration of the oven, see 6.5 and Annex A. Generally, a minimum separation of 20 mm is recommended. (See Figure 3.)

NOTE If glasses of very different size are put on the same stillage, they will require greater separation in order to prevent glass breakage when the furnace is opened after the heat soak process. The same applies to glasses with holes, notches and cut-outs. Dimensions in millimetres

Figure 3 — Recommend separation between glass The positioning of the separators, material of the manufacture and their shape shall be specified during the calibration test of the oven and shall be reproduced during the manufacturing process. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 11 6.5 Calibration The heat soak system, e.g. oven, glass separation, separators, etc., shall be calibrated, see Annex A. The calibration shall determine the heating phase of the process, glass separation distance, the positioning, material and shape of separators, the type and positioning of stillage(s) and define the operating conditions for use during manufacture. 7 Fracture characteristics In the event of breakage, heat soaked thermally toughened alkaline earth silicate safety glass fractures into numerous small pieces, the edges of which are generally blunt. NOTE Fragmentation in service does not always correspond to that described in Clause 10, due to restraint from fixing or reprocessing (e.g. laminating), or due to the cause of fracture. 8 Dimensions and tolerances 8.1 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 Nominal thickness

d Thickness tolerances
4 5 6 8 10 12 15 ± 0,2 ± 0,2 ± 0,2 ± 0,3 ± 0,3 ± 0,3 ± 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 4 sides, and away from the area of any tong marks (see Figure 6), which may be present. 8.2 Width and length (sizes) 8.2.1 General When heat soaked thermally toughened alkaline earth silicate 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 4. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 12

Figure 4 — Examples of width, B, and length, H, relative to the pane shape 8.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer shall be consulted. 8.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the finished pane shall not be larger than a prescribed rectangle resulting from the nominal dimensions increased by the tolerance, t, or smaller than a prescribed rectangle reduced by the tolerance, t. The sides of the prescribed rectangles are parallel to one another and these rectangles shall have a common centre (see Figure 5). The limits of squareness shall be determined by the prescribed rectangles. Tolerances are given in Table 2.

Figure 5 — Tolerance limits for dimensions of rectangular panes kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 13 Table 2 — Tolerances on width, B, and length, H Dimensions in millimetres Nominal dimension of side,

B or H Tolerance, t nominal glass thickness,
d ≤ 12 nominal glass thickness,
d > 12 ≤ 2 000 ± 2,5 (horizontal toughening)
± 3,0 (vertical toughening)
± 3,0
> 2 000 to 3 000
± 3,0 ± 4,0 > 3 000 ± 4,0 ± 5,0

8.2.4 Edge deformation produced by vertical toughening The tongs used to suspend the glass during toughening can result in surface depressions, known as tong marks (see Figure 6). The centres of the tong marks may be situated up to a maximum of 20 mm in from the edge. A deformation of the edge less than 2 mm can be produced in the region of the tong mark and there can also be an area of optical distortion. These deformations shall be included in the tolerances in Table 2.

Key 1 deformation 2 up to 20 mm 3 tong mark 4 100 mm radius maximum area of optical distortion Figure 6 — Tong mark deformation 8.3 Flatness 8.3.1 General By the very nature of the toughening process, it is not possible to obtain a product as flat as annealed glass. The difference depends on the nominal thickness, the dimensions and the ratio between the dimensions. Therefore a distortion known as overall bow may occur. There are two kinds of bow (see Figure 7):  overall or general bow,  local bow. kSIST FprEN 15682-1:2013

FprEN 15682-1:2012 (E) 14 NOTE 1 Overall bow can, in general, be accommodated by the framing system. NOTE 2 Local bow needs to be allowed for in the glazing materials and the weather seals. 8.3.2 Measurement of overall bow The pane of glass shall be placed in a vertical position and supported on its longer side by two load bearing blocks at the quarter points (see Figure 8). The deformation shall be measured along the edges of the glass and along the diagonals, as the maximum distance between a straight metal ruler, or a stretched wire, and the concave surface of the glass (see Figure 7). The value for the bow is then expressed as the deformation, in millimetres, divided by the measured length of the edge of the glass, or diagonal, in millimetres, as appropriate. The measurement shall be carried out at ambient temperature. kSIST FprEN 15682-1:2013

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