1、December 2016 English price group 19No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.040.20!%h 8 2 000 2,0 3,0 2
2、000 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 4 6 2 000 3 000 8 10 8.2.4 Edge deformation produce
3、d 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 t
4、he 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 DIN EN 14179-1:2016-12 EN 1
5、4179-1:2016 (E) 15 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. This difference in flatness depends on the type of glass, e.g. coated etc., glass dimensions, i.e. the nominal thickness, the dimensions and t
6、he ratio between the dimensions, and the toughening process employed. There are six kinds of distortion: overall bow (see Figure 6); roller wave distortion (for horizontally toughened glass only) (see Figure 7); wave distortion (for toughened glass manufactured by air cushion process only) (see Figu
7、re 11); edge lift (for horizontally toughened glass only) (see Figure 8); perimeter deformation (for toughened glass manufactured by air cushion process only) (see Figure 13); NOTE Overall bow, roller wave, edge lift and perimeter deformation can, in general, be accommodated by the framing system. l
8、ocal distortion (for vertically toughened glass only) (see Figure 9). Local distortion needs to be allowed for within the glazing materials and the weather seals. For special requirements, the manufacturer should be consulted. DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 16 Key 1 deformation for calcu
9、lating 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 DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 17 Key
10、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
11、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 gl
12、ass 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 diago
13、nal, 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. DIN EN 14179-1:2016-12 EN 14179-1:201
14、6 (E) 18 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
15、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
16、: 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 gla
17、ss surface and the straight edge. Increase the thickness of the feeler gauges until they just fill the gap DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 19 between glass surface and the straight edge. Record the thickness of feeler gauge(s) to an accuracy of 0,05 mm. Repeat the measurement at several p
18、laces over the glass surface. The measured wave or roller wave distortion is the maximum value measured. The maximum allowable values are given in Table 4 and Table 6. 8.3.3.4 Limitations The following limitations apply. The wave and roller wave can only be measured on panes with a dimension greater
19、 than 600 mm measured at right angles to the wave and roller waves. The wave and roller wave cannot be measured in an exclusion area that is 150 mm from the edges of the pane. The apparatus should not be used in the area of these 150 mm. Panes with an overall bow shall be laid on a flat support. Thi
20、s will allow gravity to flatten out the overall bow and hence give a truer result for the roller wave. Dimensions in millimetres 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 Me
21、asurement 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 meas
22、ured 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 co
23、ntact the manufacturer. DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 20 Dimensions in millimetres 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
24、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
25、 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 Measureme
26、nt 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). DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 21
27、Local distortion shall be measured over a limited length of 300 mm by using a straight ruler parallel to the edge at a distance of 25 mm from the edge of the glass (see Figure 14). Local distortion is expressed as millimetres / 300 mm length. Dimensions in millimetres Key 1 straight edge 2 local dis
28、tortion 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, w
29、hen 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 wav
30、e 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 5721 and EN 5722 3,0 0,3 Others a4,0 0,5 Dependent upon the wavelength of the roller wave an appropriate length of gauge has to
31、 be used aFor enamelled glass which is not covered over the whole surface the manufacturer should be consulted. DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 22 Table 5 Maximum allowable values for edge lift for horizontally toughened glass Type of glass Thickness of glass mm Maximum allowable values m
32、m Uncoated float glass in accordance with EN 5721 and EN 5722 3 0,5 4 to 5 0,4 6 to 25 0,3 Others aall 0,5 Dependent upon the wavelength of the roller wave an appropriate length of gauge has to be used For uncoated float glass with a thickness of 2 mm the manufacturer should be consulted aFor enamel
33、led glass which is not covered over the whole surface the manufacturer should be consulted. 8.3.8 Limitation on overall bow, wave and perimeter deformation for toughened glass manufactured by air cushion process The maximum allowable values for the overall bow, when measured according to 8.3.2, for
34、waves, when measured according to 8.3.3 and perimeter deformation, when measured according to 8.3.5 are given in Tables 6 and 7. These values only apply to thermally toughened soda lime silicate safety glass without holes and / or notches and / or cut-outs. Table 6 Maximum allowable values of overal
35、l bow and wave distortion for toughened glass manufactured by air cushion process Glass Type Maximum allowable value for distortion Overall bow mm / m Wave mm Float glass in accordance with EN 5721 and EN 5722 and coated float glass in accordance with EN 1096 3,0 0,3 Others a4,0 0,5 For other glass
36、types, the manufacturer should be consulted. aFor enamelled glass which is not covered over the whole surface the manufacturer should be consulted. Table 7 Maximum allowable values for perimeter deformation for toughened glass manufactured by air cushion process Type of glass Thickness of glass mm M
37、aximum allowable values mm Float glass in accordance with EN 5721 and EN 5722 and coated float glass in accordance with EN 1096 2 to12 0,3 Others a2 to 12 0,5 DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 23 For other glass types, the manufacturer should be consulted. aFor enamelled glass which is not
38、covered over the whole surface the manufacturer should be consulted. 8.3.9 Limitation on overall bow and local distortion for vertically toughened glass The maximum allowable values for the overall bow, when measured according to 8.3.2 and the local distortion, when measured according to 8.3.6 are g
39、iven in Table 8. These values only apply to toughened glass without holes and / or notches and / or cut-outs. Table 8 Maximum allowable values of overall bow and local distortion for vertically toughened glass Glass Type Maximum allowable value for distortion Overall bow mm / m Local distortion mm /
40、 300 mm All a5,0 1,0 aFor enamelled glass which is not covered over the whole surface the manufacturer should be consulted.8.3.10 Other distortions The incorporation of holes and / or notches in a plate gives the possibility of distortions being produced during the toughening process as a result of
41、the absence of glass and / or an increase in unsupported edges. NOTE The magnitude of these distortions will generally be less than edge lift in horizontally toughened glass or local distortion in vertically toughened glass. 9 Edge and / or surface work, holes, notches and cut-outs 9.1 Warning Heat
42、soaked thermally toughened soda lime silicate safety glass shall not be cut, sawn, drilled, edge worked after toughening or the heat soak process because the risk of breakage is increased or the glass can be destroyed immediately. Surface finished glasses (e.g. sandblasted, acid etched) after toughe
43、ning or the heat soak process are not covered by this European Standard. 9.2 Edge working of glass for toughening The simplest type of edge working is the arrissed edge (see Figure 15). Other common types of edge working are shown in Figures 16 to 18. For specialist edge work, such as water jet cutt
44、ing, the manufacturers should be consulted. Corners need not to be treated unless required by the customer. NOTE The rollers used to convey glass produced by the inclined air cushion process may cause slight marks on the edge of the pane. This applies to polished edges in particular. Figure 15 Arris
45、sed edge (with blank spots) DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 24 Figure 16 Ground edge (with blank spots) Figure 17 Smooth ground edge (no blank spots) Figure 18 Polished edge 9.3 Profiled edges Various other edge profiles can be manufactured with different types of edgework. This kind of p
46、roduct is not covered by Table 5 due to the influence of the profile. 9.4 Round holes 9.4.1 General This European Standard considers only round holes in glass that is not less than 4 mm nominal thickness. The manufacturers should be consulted about edge working of holes. This edge work applies only
47、to the perimeter of the holes. 9.4.2 Diameter of holes The diameter of holes, , shall not, in general, be less than the nominal thickness of the glass. For smaller holes, the manufacturers should be consulted. 9.4.3 Limitations on position of holes In general, the limitations on hole positions relat
48、ive to the edges of the glass pane, the comers of the glass pane and to each other depends on: nominal glass thickness (d); dimensions of the pane (B, H); hole diameter (); shape of the pane; number of holes. DIN EN 14179-1:2016-12 EN 14179-1:2016 (E) 25 The recommendations given below are those whi
49、ch are normally available. a) The distance, a, of the edge of a hole to the glass edge should be not less than 2d. Figure 19 Relationship between hole and edge of pane b) The distance, b, between the edges of two holes should be not less than 2d. Figure 20 Relationship between two holes c) The distance, c, of the edge of a hole to the corner of the glass should be not less than 6d. Figure 21 Relationship between hole and corner of pane If one of the distances from the edge of the h
