BS EN 14179-1:2016 – TC:2020 Edition
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Tracked Changes. Glass in building. Heat soaked thermally toughened soda lime silicate safety glass – Definition and description
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 111 |
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. Curved heat soaked thermally toughened soda lime silicate safety glass is not 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 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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 65 | Contents Page |
| 67 | European foreword |
| 68 | Introduction |
| 69 | 1 Scope 2 Normative references 3 Terms and definitions |
| 71 | 4 Glass products 5 Manufacturing processes 5.1 General |
| 72 | 5.2 Toughening process 5.3 Heat soak process cycle 5.3.1 General Figure 1 — Heat soak process cycle 5.3.2 Heating phase |
| 73 | 5.3.3 Holding phase 5.3.4 Cooling phase 6 Heat soak process system 6.1 General 6.2 Oven 6.3 Glass support 6.4 Glass separation |
| 74 | Figure 2 — Example of a vertical glass separator Figure 3 — Recommended separation between glass 6.5 Calibration |
| 75 | 7 Fracture characteristics 8 Dimensions and tolerances 8.1 Nominal thickness and thickness tolerances Table 1 — Nominal thicknesses and thickness tolerances |
| 76 | 8.2 Width and length (sizes) 8.2.1 General Figure 4 — Examples of width, B, and length, H, relative to the pane shape 8.2.2 Maximum and minimum sizes 8.2.3 Tolerances and squareness |
| 77 | Table 2 — Tolerances on width, B, and length, H Table 3 — Limit deviations for the difference between diagonals 8.2.4 Edge deformation produced by vertical toughening Figure 5 — Tong mark deformation |
| 78 | 8.3 Flatness 8.3.1 General |
| 79 | Figure 6 — Representation of overall bow Figure 7 — Representation of roller wave distortion |
| 80 | Figure 8 — Representation of edge lift Figure 9 — Representation of local distortion 8.3.2 Measurement of overall bow |
| 81 | Figure 10 — Support conditions for the measurement of overall distortion 8.3.3 Measurement of wave and roller wave 8.3.3.1 General 8.3.3.2 Apparatus 8.3.3.3 Method |
| 82 | 8.3.3.4 Limitations Figure 11 — Measurement of wave or roller wave distortion 8.3.4 Measurement of edge lift (for horizontally toughened glass only) |
| 83 | Figure 12 — Measurement of edge lift 8.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process Figure 13 — Measurement of perimeter deformation 8.3.6 Measurement of local distortion (for vertically toughened glass only) |
| 84 | Figure 14 — Measurement of local distortion 8.3.7 Limitation on overall bow, roller waves and edge lift for horizontally toughened glass Table 4 — Maximum allowable values of overall bow and roller wave distortion for horizontally toughened glass |
| 85 | Table 5 — Maximum allowable values for edge lift for horizontally toughened glass 8.3.8 Limitation on overall bow, wave and perimeter deformation for toughened glass manufactured by air cushion process Table 6 — Maximum allowable values of overall bow and wave distortion for toughened glass manufactured by air cushion process Table 7 — Maximum allowable values for perimeter deformation for toughened glass manufactured by air cushion process |
| 86 | 8.3.9 Limitation on overall bow and local distortion for vertically toughened glass Table 8 — Maximum allowable values of overall bow and local distortion for vertically toughened glass 8.3.10 Other distortions 9 Edge and / or surface work, holes, notches and cut-outs 9.1 Warning 9.2 Edge working of glass for toughening Figure 15 — Arrissed edge (with blank spots) |
| 87 | Figure 16 — Ground edge (with blank spots) Figure 17 — Smooth ground edge (no blank spots) Figure 18 — Polished edge 9.3 Profiled edges 9.4 Round holes 9.4.1 General 9.4.2 Diameter of holes 9.4.3 Limitations on position of holes |
| 88 | Figure 19 — Relationship between hole and edge of pane Figure 20 — Relationship between two holes Figure 21 — Relationship between hole and corner of pane 9.4.4 Tolerances on hole diameters |
| 89 | Table 9 — Tolerances on hole diameters 9.4.5 Tolerances on position of holes Figure 22 — Examples of the positioning of holes relative to the datum point |
| 90 | 9.5 Holes / others Figure 23 — Countersunk hole 9.6 Notches and cut-outs Figure 24 — Examples of notches and cut-outs 9.7 Shaped panes 10 Fragmentation test 10.1 General 10.2 Dimensions and number of test specimens 10.3 Test procedure |
| 91 | Figure 25 — Position of impact point 10.4 Assessment of fragmentation |
| 92 | Figure 26 — Area to be excluded from the particle count determination and largest particle measurement Figure 27 — Examples of crack-free particles and the assessment regarding the number 10.5 Minimum values from the particle count |
| 93 | Table 10 — Minimum particle count values 10.6 Selection of the longest particle 10.7 Maximum length of longest particle 11 Other physical characteristics 11.1 Optical distortion 11.1.1 Heat soaked thermally toughened soda lime silicate safety glass produced by vertical toughening 11.1.2 Heat soaked thermally toughened soda lime silicate safety glass produced by horizontal toughening 11.2 Anisotropy (iridescence) 11.3 Thermal durability |
| 94 | 11.4 Mechanical strength Table 11 — Minimum values for the characteristic bending strength of heat soaked thermally toughened soda lime silicate safety glass 11.5 Classification of performance under accidental human impact 12 Marking |
| 95 | Annex A (normative) Heat soak process system calibration test A.1 Calibration criteria Figure A.1 — Time / temperature regime as calibration criteria A.2 Loading of oven and position for glass surface temperature measurement |
| 96 | A.3 Procedure A.4 Records |
| 97 | A.5 Interpretation of the calibration test |
| 98 | Figure A.2 — 1st category – 1 stillage – full load |
| 99 | Figure A.3 — 2nd category – 2 mono side stillages – full load |
| 100 | Figure A.4 — 2nd category – 2 double sided stillages – full load |
| 101 | Figure A.5 — 3rd category – 6 or 8 or 9 … stillages – full load |
| 102 | Annex B (informative) Alternative method for the measurement of roller wave distortion B.1 Apparatus Figure B.1 — Roller wave measurement apparatus B.2 Method Figure B.2 — Place the apparatus across the roller wave Figure B.3 — Set the zero of the gauge on a peak of the roller wave |
| 103 | Figure B.4 — Move the gauge to a trough B.3 Limitations B.4 Alternative use of apparatus |
| 104 | Annex C (informative) Examples of particle count Figure C.1 — Select the area of coarsest fracture, place the template on the test specimen and draw round the template Figure C.2 — Mark and count the perimeter fragments as 1/2 particle each |
| 105 | Figure C.3 — Mark and count the central fragments and add these to the perimeter count to obtain the particle count for the specimen |
| 106 | Bibliography |
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BS EN 14179-1:2016
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