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BS EN 14179-1:2016 - TC Tracked Changes. Glass in building. Heat soaked thermally toughened soda lime silicate safety glass - Definition and description, 2020
- 30310336_new.pdf [Go to Page]
- Contents Page
- European foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Glass products
- 5 Manufacturing processes [Go to Page]
- 5.1 General
- 5.2 Toughening process
- 5.3 Heat soak process cycle [Go to Page]
- 5.3.1 General
- Figure 1 — Heat soak process cycle [Go to Page]
- 5.3.2 Heating phase
- 5.3.3 Holding phase
- 5.3.4 Cooling phase
- 6 Heat soak process system [Go to Page]
- 6.1 General
- 6.2 Oven
- 6.3 Glass support
- 6.4 Glass separation
- Figure 2 — Example of a vertical glass separator
- Figure 3 — Recommended separation between glass [Go to Page]
- 6.5 Calibration
- 7 Fracture characteristics
- 8 Dimensions and tolerances [Go to Page]
- 8.1 Nominal thickness and thickness tolerances
- Table 1 — Nominal thicknesses and thickness tolerances [Go to Page]
- 8.2 Width and length (sizes) [Go to Page]
- 8.2.1 General
- Figure 4 — Examples of width, B, and length, H, relative to the pane shape [Go to Page]
- 8.2.2 Maximum and minimum sizes
- 8.2.3 Tolerances and squareness
- Table 2 — Tolerances on width, B, and length, H
- Table 3 — Limit deviations for the difference between diagonals [Go to Page]
- 8.2.4 Edge deformation produced by vertical toughening
- Figure 5 — Tong mark deformation [Go to Page]
- 8.3 Flatness [Go to Page]
- 8.3.1 General
- Figure 6 — Representation of overall bow
- Figure 7 — Representation of roller wave distortion
- Figure 8 — Representation of edge lift
- Figure 9 — Representation of local distortion [Go to Page]
- 8.3.2 Measurement of overall bow
- Figure 10 — Support conditions for the measurement of overall distortion [Go to Page]
- 8.3.3 Measurement of wave and roller wave [Go to Page]
- 8.3.3.1 General
- 8.3.3.2 Apparatus
- 8.3.3.3 Method
- 8.3.3.4 Limitations
- Figure 11 — Measurement of wave or roller wave distortion [Go to Page]
- 8.3.4 Measurement of edge lift (for horizontally toughened glass only)
- Figure 12 — Measurement of edge lift [Go to Page]
- 8.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process
- Figure 13 — Measurement of perimeter deformation [Go to Page]
- 8.3.6 Measurement of local distortion (for vertically toughened glass only)
- Figure 14 — Measurement of local distortion [Go to Page]
- 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
- Table 5 — Maximum allowable values for edge lift for horizontally toughened glass [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 8.3.10 Other distortions
- 9 Edge and / or surface work, holes, notches and cut-outs [Go to Page]
- 9.1 Warning
- 9.2 Edge working of glass for toughening
- Figure 15 — Arrissed edge (with blank spots)
- Figure 16 — Ground edge (with blank spots)
- Figure 17 — Smooth ground edge (no blank spots)
- Figure 18 — Polished edge [Go to Page]
- 9.3 Profiled edges
- 9.4 Round holes [Go to Page]
- 9.4.1 General
- 9.4.2 Diameter of holes
- 9.4.3 Limitations on position of holes
- Figure 19 — Relationship between hole and edge of pane
- Figure 20 — Relationship between two holes
- Figure 21 — Relationship between hole and corner of pane [Go to Page]
- 9.4.4 Tolerances on hole diameters
- Table 9 — Tolerances on hole diameters [Go to Page]
- 9.4.5 Tolerances on position of holes
- Figure 22 — Examples of the positioning of holes relative to the datum point [Go to Page]
- 9.5 Holes / others
- Figure 23 — Countersunk hole [Go to Page]
- 9.6 Notches and cut-outs
- Figure 24 — Examples of notches and cut-outs [Go to Page]
- 9.7 Shaped panes
- 10 Fragmentation test [Go to Page]
- 10.1 General
- 10.2 Dimensions and number of test specimens
- 10.3 Test procedure
- Figure 25 — Position of impact point [Go to Page]
- 10.4 Assessment of fragmentation
- 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 [Go to Page]
- 10.5 Minimum values from the particle count
- Table 10 — Minimum particle count values [Go to Page]
- 10.6 Selection of the longest particle
- 10.7 Maximum length of longest particle
- 11 Other physical characteristics [Go to Page]
- 11.1 Optical distortion [Go to Page]
- 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
- 11.4 Mechanical strength
- Table 11 — Minimum values for the characteristic bending strength of heat soaked thermally toughened soda lime silicate safety glass [Go to Page]
- 11.5 Classification of performance under accidental human impact
- 12 Marking
- 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
- A.3 Procedure
- A.4 Records
- A.5 Interpretation of the calibration test
- Figure A.2 — 1st category – 1 stillage – full load
- Figure A.3 — 2nd category – 2 mono side stillages – full load
- Figure A.4 — 2nd category – 2 double sided stillages – full load
- Figure A.5 — 3rd category – 6 or 8 or 9 ... stillages – full load
- 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
- Figure B.4 — Move the gauge to a trough
- B.3 Limitations
- B.4 Alternative use of apparatus
- 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
- Figure C.3 — Mark and count the central fragments and add these to the perimeter count to obtain the particle count for the specimen
- Bibliography [Go to Page]