UNE-EN 14179-1:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Glass products
5 Manufacturing processes
   5.1 General
   5.2 Toughening process
   5.3 Heat soak process cycle
6 Heat soak process system
   6.1 General
   6.2 Oven
   6.3 Glass support
   6.4 Glass separation
   6.5 Calibration
7 Fracture characteristics
8 Dimensions and tolerances
   8.1 Nominal thickness and thickness tolerances
   8.2 Width and length (sizes)
   8.3 Flatness
9 Edge work, holes, notches and cut-outs
   9.1 Warning
   9.2 Edge working of glass for toughening
   9.3 Profiled edges
   9.4 Round holes
   9.5 Notches and cut-outs
   9.6 Shaped panes
10 Fragmentation test
   10.1 General
   10.2 Dimensions and number of test specimens
   10.3 Test procedure
   10.4 Assessment of fragmentation
   10.5 Minimum values from the particle count
   10.6 Selection of the longest particle
   10.7 Maximum length of longest particle
11 Other physical characteristics
   11.1 Optical distortion
   11.2 Anisotropy (iridescence)
   11.3 Thermal durability
   11.4 Mechanical strength
   11.5 Classification of performance under accidental
         human impact
12 Marking
Annex A (normative) Heat soak process system calibration test
   A.1 Calibration criteria
   A.2 Loading of oven and position for glass surface temperature
        measurement
   A.3 Procedure
   A.4 Records
   A.5 Interpretation of the calibration test
Annex B (informative) Curved heat soaked thermally toughened soda
        lime silicate safety glass
Annex C (informative) Examples of particle count
Bibliography

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 soda lime silicate safety glass for use in buildings.Information on curved heat soaked thermally toughened soda lime silicate safety glass is given in Annex B, but this product does not form part of this European Standard.Other requirements, not specified in this European Standard, can apply to heat soaked thermally toughened soda lime 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. Heat soaked thermally toughened soda lime silicate safety glass, in this case, does not lose its mechanical or thermal characteristics.Surface finished glasses (e.g. sandblasted, acid etched) after toughening are not covered by this European Standard.