This European Standard specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat thermally toughened soda lime silicate safety glass for use in buildings. Information on curved thermally toughened soda lime silicate safety glass is given in Annex A, but this product does not form part of this European Standard. Other requirements, not specified in this European Standard, can apply to thermally toughened soda lime silicate safety glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate glass product standard. Thermally toughened soda lime silicate safety glass, in this case, does not lose its bending strength characteristics and its resistance to temperature differentials. Surface finished glasses (e.g. sandblasted, acid etched) after toughening are not covered by this European Standard.<\/p>\n
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| 4<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4 Glass products 5 Fracture characteristics <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 6 Dimensions and tolerances 6.1 Nominal thickness and thickness tolerances Table 1 \u2014 Nominal thicknesses and thickness tolerances 6.2 Width and length (sizes) 6.2.1 General <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figure 1 \u2014 Examples of width, B, and length, H, relative to the pane shape 6.2.2 Maximum and minimum sizes 6.2.3 Tolerances and squareness Table 2 \u2014 Tolerances on width, B, and length, H Table 3 \u2014 Limit deviations for the difference between diagonals <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6.2.4 Edge deformation produced by the vertical process Figure 2 \u2014 Tong mark deformation 6.3 Flatness 6.3.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Figure 3 \u2014 Representation of overall bow Figure 4 \u2014 Representation of roller wave distortion <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 5 \u2014 Representation of edge lift Figure 6 \u2014 Representation of local distortion 6.3.2 Measurement of overall bow <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Figure 7 \u2014 Support conditions for the measurement of overall bow 6.3.3 Measurement of wave and roller wave 6.3.3.1 General 6.3.3.2 Apparatus <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 6.3.3.3 Method 6.3.3.4 Limitations Figure 8 \u2014 Measurement of wave or roller wave distortion 6.3.4 Measurement of edge lift (for horizontally toughened glass only) <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 9 \u2014 Measurement of edge lift 6.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process Figure 10 \u2014 Measurement of perimeter deformation <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.3.6 Measurement of local distortion (for vertically toughened glass only) Figure 11 \u2014 Measurement of local distortion 6.3.7 Limitation on overall bow, roller waves and edge lift for horizontally toughened glass <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Table 4 \u2014 Maximum allowable values of overall bow and roller wave distortion for horizontally toughened glass Table 5 \u2014 Maximum allowable values for edge lift for horizontal toughening 6.3.8 Limitation on overall bow, wave and perimeter deformation for toughened glass manufactured by air cushion process <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table 6 \u2014 Maximum allowable values of overall bow and wave distortion for toughened glass manufactured by air cushion process Table 7 \u2014 Maximum allowable values for perimeter deformation for toughened glass manufactured by air cushion process 6.3.9 Limitation on overall bow and local distortion for vertically toughened glass Table 8 \u2014 Maximum allowable values of overall bow and local distortion for vertical toughened glass 6.3.10 Other distortions <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7 Edge and\/or surface work, holes, notches and cut-outs 7.1 Warning 7.2 Edge working of glass for toughening Figure 12 \u2014 Arrissed edge (with blank spots) Figure 13 \u2014 Ground edge (with blank spots) Figure 14 \u2014 Smooth ground edge (no blank spots) <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure 15 \u2014 Polished edge 7.3 Profiled edges 7.4 Round holes 7.4.1 General 7.4.2 Diameter of holes 7.4.3 Limitations on position of holes Figure 16 \u2014 Relationship between hole and edge of pane <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure 17 \u2014 Relationship between two holes Figure 18 \u2014 Relationship between hole and corner of pane 7.4.4 Tolerances on hole diameters Table 9 \u2014 Tolerances on hole diameters <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 7.4.5 Tolerances on position of holes Figure 19 \u2014 Examples of the positioning of holes relative to the datum point 7.5 Holes\/others <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure 20 \u2014 Countersunk hole 7.6 Notches and cut-outs Figure 21 \u2014 Examples of notches and cut-outs 7.7 Shaped panes 8 Fragmentation test 8.1 General 8.2 Dimensions and number of test specimens 8.3 Test procedure <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Figure 22 \u2014 Position of impact point 8.4 Assessment of fragmentation <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure 23 \u2014 Area to be excluded from the particle count determination and largest particle measurement Figure 24 \u2014 Examples of crack-free particles and the assessment regarding the number 8.5 Minimum values from the particle count <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Table 10 \u2014 Minimum particle count values 8.6 Selection of the longest particle 8.7 Maximum length of longest particle 9 Other physical characteristics 9.1 Optical distortion 9.1.1 Thermally toughened soda lime silicate safety glass produced by vertical toughening 9.1.2 Thermally toughened soda lime silicate safety glass produced by horizontal toughening 9.2 Anisotropy (iridescence) 9.3 Thermal durability <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 9.4 Mechanical strength Table 11 \u2014 Minimum values for the mechanical strength of thermally toughened soda lime silicate safety glass 9.5 Classification of performance under accidental human impact 10 Marking <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex A (informative) Curved thermally toughened soda lime silicate safety glass <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex B (informative) Alternative method for the measurement of roller wave distortion B.1 Apparatus Figure B.1 \u2014 Roller wave measurement apparatus B.2 Method Figure B.2 \u2014 Place the apparatus across the roller wave Figure B.3 \u2014 Set the zero of the gauge on a peak of the roller wave <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure B.4 \u2014 Move the gauge to a trough B.3 Limitations B.4 Alternative use of apparatus <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annex C (informative) Examples of particle count Figure C.1 \u2014 Example of selecting the area of coarsest fracture <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure C.2 \u2014 Example of marking and counting <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure C.3 \u2014 Example for marking and counting of overall particle count for the specimen <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex D (informative) Risk of spontaneous breakage of toughened glass due to nickel sulfide inclusion <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Glass in building. Thermally toughened soda lime silicate safety glass – Definition and description<\/b><\/p>\n |