SIST EN 14179-1:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - HS-preskus kaljenega natrij-kalcijevega silikatnega varnostnega stekla - 1. del: Definicije in opisGlas im Bauwesen - Heißgelagertes thermisch vorgespanntes Kalknatron-Einscheibensicherheitsglas - Teil 1: Definition und BeschreibungVerre dans la construction - Verre de silicate sodo-calcique de sécurité trempé et traité Heat Soak - Partie 1: Définition et descriptionGlass in building - Heat soaked thermally toughened soda lime silicate safety glass - Part 1: Definition and description81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 14179-1:2016SIST EN 14179-1:2016en,fr,de01-oktober-2016SIST EN 14179-1:2016SLOVENSKI
STANDARDSIST EN 14179-1:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14179-1
July
t r s x ICS
z sä r v rä t r Supersedes EN
s v s y {æ sã t r r wEnglish Version
Glass in building æ Heat soaked thermally toughened soda lime silicate safety glass æ Part
sã Definition and description Verre dans la construction æ Verre de silicate sodoæcalcique de sßcuritß trempß et traitß Heat Soak æ Partie
sã Dßfinition et description
Glas im Bauwesen æ Heißgelagertes thermisch vorgespanntes KalknatronæEinscheibensicherheitsglas æ Teil
sã Definition und Beschreibung This European Standard was approved by CEN on
s t May
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v s y {æ sã t r s x ESIST EN 14179-1:2016

European foreword . 4 Introduction . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Glass products . 8 5 Manufacturing processes . 8 5.1 General . 8 5.2 Toughening process . 9 5.3 Heat soak process cycle . 9 6 Heat soak process system . 10 6.1 General . 10 6.2 Oven . 10 6.3 Glass support . 10 6.4 Glass separation . 10 6.5 Calibration . 11 7 Fracture characteristics . 12 8 Dimensions and tolerances . 12 8.1 Nominal thickness and thickness tolerances . 12 8.2 Width and length (sizes) . 13 8.3 Flatness . 15 9 Edge and / or surface work, holes, notches and cut-outs . 23 9.1 Warning . 23 9.2 Edge working of glass for toughening . 23 9.3 Profiled edges . 24 9.4 Round holes . 24 9.5 Holes / others . 27 9.6 Notches and cut-outs . 27 9.7 Shaped panes . 27 10 Fragmentation test . 27 10.1 General . 27 10.2 Dimensions and number of test specimens . 27 10.3 Test procedure . 27 10.4 Assessment of fragmentation . 28 10.5 Minimum values from the particle count . 29 10.6 Selection of the longest particle . 30 10.7 Maximum length of longest particle . 30 11 Other physical characteristics . 30 11.1 Optical distortion . 30 11.2 Anisotropy (iridescence) . 30 11.3 Thermal durability . 30 SIST EN 14179-1:2016

Heat soak process system calibration test . 32 A.1 Calibration criteria. 32 A.2 Loading of oven and position for glass surface temperature measurement . 32 A.3 Procedure . 33 A.4 Records . 33 A.5 Interpretation of the calibration test . 34 Annex B (informative)
Alternative method for the measurement of roller wave distortion . 39 B.1 Apparatus . 39 B.2 Method . 39 B.3 Limitations . 40 B.4 Alternative use of apparatus . 40 Annex C (informative)
Examples of particle count . 41 Bibliography . 43
Key T glass temperature at any point, °C d ambient temperature t time, h a heating phase 1 first glass to reach 250 °C b holding phase 2 last glass to reach 250 °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 250 °C. The maximum heating rate is 3° C per minute. 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. NOTE 1 The glass separation and rate of heating should be controlled to minimize the risk of glass breakage as a result of thermal stress. To facilitate economic heating, the air temperature within the oven may exceed 290 °C. However, the glass surface temperature shall not be allowed to exceed 290 °C. The period of glass surface temperature in excess of 270 °C shall be minimized. NOTE 2 Care should be taken to ensure the maximum temperature of the glass does not exceed 270° C as there is a possibility of the nickel sulphide inclusion reconverting. SIST EN 14179-1:2016

Figure 2 — Example of a vertical glass separator 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.
Figure 3 — Recommended 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. 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. SIST EN 14179-1:2016

Figure 4 — Examples of width, B, and length, H, relative to the pane shape For heat soaked thermally toughened soda lime silicate safety glass manufactured from patterned glass, the direction of the pattern should be specified relative to one of the dimensions. 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 the nominal dimensions increased by the tolerance t, or smaller than the nominal dimensions reduced by the tolerance t. Limits are given in Table 2. The squareness of rectangular glass panes is expressed by the difference between its diagonals. The difference between the two diagonal lengths of the pane of glass shall not be larger than the deviation limit, v, as specified in Table 3. SIST EN 14179-1:2016

B or H Tolerance, t nominal glass thickness,
d
8 nominal glass thickness,
d > 8
2 000 ±2,0 ±3,0 2 000 < B or H
3 000 ±3,0 ±4,0 > 3 000 ±4,0 ±5,0 Table 3 — Limit deviations for the difference between diagonals Dimensions in millimetres Limit deviation v on the difference between diagonals Nominal dimension B or H nominal glass thickness,
d
8 nominal glass thickness,
d > 8
2 000
6 2 000 < B or H
3 000
8 > 3 000
10 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 5). 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 5 — Tong mark deformation SIST EN 14179-1:2016

Key 1 deformation for calculating overall bow 2 B, or H, or diagonal length 3 thermally toughened soda lime silicate safety glass Figure 6 — Representation of overall bow
Key 1 thermally toughened soda lime silicate safety glass Figure 7 — Representation of roller wave distortion SIST EN 14179-1:2016

Key 1 straight edge 2 edge lift 3 thermally toughened soda lime silicate safety glass Figure 8 — Representation of edge lift
Key 1 local distortion 2 thermally toughened soda lime silicate safety glass Figure 9 — Representation of local distortion 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 10). For glass thinner than 4 mm nominal thickness the support will have an angle between 3 and 7° from the vertical. 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 6). 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 room temperature. The maximum allowable values for overall bow are given in Table 4 and Table 6. NOTE Results from this this test method for glasses thinner than 4 mm may be inaccurate. SIST EN 14179-1:2016

Key 1 B or H 2 (B or H)/2 3 (B or H)/4 4 thermally toughened soda lime silicate safety glass 5 support Figure 10 — Support conditions for the measurement of overall distortion 8.3.3 Measurement of wave and roller wave 8.3.3.1 General The wave or roller wave is measured by means of a straight edge, or equivalent, being placed at right angles to the wave or roller wave and bridging from peak to peak of the waves (see Figure 11). NOTE This section deals with measurement using a straight edge and feeler gauges. An alternative method is described in Annex B. 8.3.3.2 Apparatus A straight edge: — length of between 300 mm and 400 mm. The minimal length of the straight edge has to bridge two peaks of the roller waves. Feeler gauges: — various thicknesses in units of 0,05 mm. 8.3.3.3 Method Place the straight edge so that it bridges across adjacent peaks. Insert the feeler gauge between the glass surface and the straight edge. Increase the thickness of the feeler gauges until they just fill the gap SIST EN 14179-1:2016

Key 1 straight edge 2 wave or roller wave distortion 3 thermally toughened soda lime silicate safety glass Figure 11 — Measurement of wave or roller wave distortion 8.3.4 Measurement of edge lift (for horizontally toughened glass only) The glass shall be placed on a flat support with the edge lift overhanging the edge of the support by between 50 mm and 100 mm. The straight edge is placed on the peaks of the roller waves and the gap between the ruler and the glass measured using a feeler gauge (see Figure 12). The maximum allowable values for edge lift are given in Table 5. The values in Table 5 only apply to thermally toughened soda lime silicate safety glass having edgework complying with Figures 15 to Figure 18. For profiled edges or other types of edgework contact the manufacturer. SIST EN 14179-1:2016

Key 1 straight edge 2 edge lift 3 thermally toughened soda lime silicate safety glass 4 flat support Figure 12 — Measurement of edge lift 8.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process Place the glass on a flat surface with the concave side facing upwards – see Figure 13. A 100 mm straight edge is laid on the pane at right angles to the edge. The gap between the ruler and the glass is measured using a feeler gauge (see Figure 13). The perimeter deformation is the maximum distance between the surface of the pane and the straight edge. The maximum allowable values for perimeter deformation are given in Table 7. Dimensions in millimetres
Key 1 straight edge 2 perimeter deformation 3 thermally toughened soda lime silicate safety glass Figure 13 — Measurement of perimeter deformation 8.3.6 Measurement of local distortion (for vertically toughened glass only) Local distortion can occur over relatively short distances on the edge of the vertically toughened glass that contains the tong marks (see Figure 5). SIST EN 14179-1:2016

Key 1 straight edge 2 local distortion 3 thermally toughened soda lime silicate safety glass Figure 14 — Measurement of local distortion 8.3.7 Limitation on overall bow, roller waves and edge lift for horizontally toughened glass The maximum allowable values for the overall bow, when measured according to 8.3.2, for roller waves, when measured according to 8.3.3 and edge lift, when measured according to 8.3.4 are given in Tables 4 and 5. These values only apply to thermally toughened soda lime silicate safety glass without holes and / or notches and / or cut-outs. Table 4 — Maximum allowable values of overall bow and roller wave distortion for horizontally toughened glass Glass Type Maximum allowable value for distortion Overall bow mm / m Roller Wave mm Uncoated float glass in accordance with EN 572–1 and EN 572–2 3,0 0,3 Others a 4,0 0,5 Dependent upon the wavelength of the roller wave an appropriate length of gauge has to be used a For enamelled glass which is not covered over the whole surface the manufacturer should be consulted. SIST EN 14179-1:2016
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