1、 ISO 2017 Glass in building Tempered soda lime silicate safety glass Verre dans la construction Verre silico-sodo-calcique de scurit tremp INTERNATIONAL STANDARD ISO 12540 First edition 2017-03 Reference number ISO 12540:2017(E) ISO 12540:2017(E)ii ISO 2017 All rights reserved COPYRIGHT PROTECTED DO
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4、2017(E)Foreword v Introduction vi 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Glass products . 3 5 Fracture characteristics 3 5.1 General . 3 5.2 Accidental human impact 3 5.3 Fragmentation . 3 6 Dimensions and tolerances . 4 6.1 Nominal thickness and thickness tolerances 4 6
5、.2 Width and length (sizes) 4 6.2.1 General 4 6.2.2 Maximum and minimum sizes . 5 6.2.3 Tolerances and squareness . 5 6.2.4 Edge deformation produced by vertical tempering 5 6.3 Flatness 6 6.3.1 General 6 6.3.2 Measurement of overall bow . 8 6.3.3 Measurement of wave or roller wave distortion 9 6.3.
6、4 Measurement of edge lift (for horizontally tempered safety glass only) .10 6.3.5 Measurement of perimeter deformation of glass produced by air cushion toughening process . 11 6.3.6 Measurement of local distortion (for vertically tempered safety glass only) 12 6.3.7 Limitation on overall bow, rolle
7、r waves and edge lift for horizontally tempered safety glass .12 6.3.8 Limitation on overall bow, wave and perimeter deformation for tempered safety glass manufactured by air cushion process 13 6.3.9 Limitation on overall bow and local distortion for vertically tempered safety glass .13 6.3.10 Other
8、 distortions 14 7 Edge work, holes, notches and cut-outs.14 7.1 General 14 7.2 Edge working of glass for tempering 14 7.3 Profiled edges15 7.4 Round holes 15 7.4.1 General.15 7.4.2 Diameter of holes .15 7.4.3 Limitations on position of holes 15 7.4.4 Tolerances on hole diameters 17 7.4.5 Tolerances
9、on position of holes 17 7.5 Holes/others 18 7.6 Notches and cut-outs 18 7.7 Shaped panes .19 8 Fragmentation test 19 8.1 General 19 8.2 Dimensions and number of test specimens 19 8.3 Test procedure 19 8.4 Assessment of fragmentation 20 8.5 Minimum values from the particle count 21 ISO 2017 All right
10、s reserved iii Contents Page ISO 12540:2017(E)8.6 Selection of the longest particle 22 8.7 Maximum length of the longest particle 22 8.8 Test report 22 9 Other physical characteristics .22 9.1 Optical distortion .22 9.1.1 Tempered safety glass produced by vertical tempering .22 9.1.2 Tempered safety
11、 glass produced by horizontal tempering 22 9.2 Anisotropy (iridescence) .22 9.3 Thermal durability 23 9.4 Mechanical strength 23 9.5 Surface pre-stress 23 10 Marking .24 11 Packaging 24 Annex A (normative) Pendulum impact test methods 25 Annex B (informative) Alternative method for the measurement o
12、f roller wave distortion 26 Annex C (informative) Example of particle count 28 Annex D (informative) Method for the measurement of the surface pre-stress of tempered safety glass .31 Bibliography .33 iv ISO 2017 All rights reserved ISO 12540:2017(E) Foreword ISO (the International Organization for S
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19、o .org/ iso/ foreword .html. This document was prepared by ISO/ TC 160, Glass in building, Subcommittee SC 1, Product considerations. ISO 2017 All rights reserved v ISO 12540:2017(E) Introduction Tempered soda lime silicate safety glass has a breakage behaviour that is different to annealed glass. T
20、his behaviour is a direct result of the high surface pre-stress. Tempered soda lime silicate safety glass has a known behaviour under accident human impact together with known mechanical and thermal stress resistance. NOTE 1 ISO/TC 160/SC 2 produces standards for the determination of the design stre
21、ngth of glass and is preparing a design method. NOTE 2 In Europe, the term “thermally toughened” is used instead of “tempered”.vi ISO 2017 All rights reserved Glass in building Tempered soda lime silicate safety glass 1 Scope This document covers product definitions, product characteristics, i.e. to
22、lerances, flatness, edgework, etc., fracture characteristics, including fragmentation, and the physical and mechanical characteristics of flat tempered soda lime silicate safety glass for use in buildings. This document does not cover curved (bent) glass according to ISO 11485. Other requirements, n
23、ot specified in this document, 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
24、product standard. Thermally toughened soda lime silicate safety glass, in this case, does not lose its mechanical or thermal characteristics. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this do
25、cument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1288-3, Glass in building Determination of the bending strength of glass Part 3: Test with specimen supported at two points (fou
26、r point bending) ISO 11479-1, Glass in building Coated glass Part 1: Physical defects ISO 16293-1, Glass in building Basic soda lime silicate glass products Part 1: Definitions and general physical and mechanical properties ISO 16293-2: 1) , Glass in building Basic soda lime silicate glass products
27、Part 2: Float glass ISO 16293-5: 1) , Glass in building Basic soda lime silicate glass products Part 5: Patterned glass ISO 29584, Glass in building Pendulum impact testing and classification of safety glass 3 T erms a nd definiti ons For the purposes of this document, the following terms and defini
28、tions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp 3.1 f l a t t e m p e r e d s a f e t y g l a s
29、 s tempered (thermally toughened) glass which has not been deliberately given a specific profile during manufacture 1) Under preparation. INTERNATIONAL ST ANDARD ISO 12540:2017(E) ISO 2017 All rights reserved 1 ISO 12540:2017(E) 3.2 enamelled tempered safety glass tempered (thermally toughened) glas
30、s which has a ceramic frit fired into the surface during the tempering (toughening) process Note 1 to entry: After tempering, the ceramic frit becomes an integral part of the glass. Note 2 to entry: The application of the ceramic frit may be by a continuous application or discontinuous, e.g. screen
31、printing. 3.3 horizontal process process in which the glass is supported on horizontal rollers 3.4 air cushion process process in which the glass is supported by an air cushion with or without additional rollers Note 1 to entry: In this process, the glass will be between horizontal and 45 of horizon
32、tal. 3.5 vertical process process in which the glass is suspended by tongs 3.6 edge deformation deformation of the edge caused by the tong marks 3.7 edge lift distortion produced in horizontally tempered safety glass, at the leading and trailing edge of the plate, as a result of the glass during the
33、 tempering (toughening) process not being supported by a roller Note 1 to entry: This is a distortion produced by a deviation from surface flatness. Note 2 to entry: Also referred to as edge dip. 3.8 perimeter deformation distortion around the edge of tempered safety glass manufactured by air cushio
34、n process 3.9 local distortion local deformation of vertically tempered safety glass underneath the tong marks 3.10 overall bow deformation of the whole pane of tempered safety glass caused by the heating and cooling process 3.11 roller wave distortion periodic distortion produced in horizontally te
35、mpered safety glass as a result of the glass during tempering process being in contact with the rollers Note 1 to entry: This is a surface distortion produced by a reduction in surface flatness. 3.12 wave distortion distortion in tempered safety glass manufactured by the air cushion process as a res
36、ult of the tempering process2 ISO 2017 All rights reserved ISO 12540:2017(E) 4 Glass products Tempered safety glass is made from a monolithic glass generally corresponding to one of the following standards: basic soda lime silicate glass products according to ISO 16293-1; float glass according to IS
37、O 16293-2; patterned glass according to ISO 16293-5; coated glass according to ISO 11479-1. NOTE For drawn sheet glass, an ISO standard is not available. Therefore, see EN 5724 or national standards. Other nominal thicknesses of glass than those covered in the above standards are possible. 5 Fractur
38、e characteristics 5.1 General In the event of breakage, tempered safety glass fractures into numerous small pieces, the edges of which are generally blunt. Fragmentation in service may not correspond exactly to that described in Clause 8, due to restraint from fixing and external actions or due to t
39、he cause of fracture. There can be different fragmentations if heat-strengthened glass is used in laminated glass. 5.2 Accidental human impact 5.2.1 When subjected to an accidental human impact, tempered safety glass will either not break or break in a manner that will reduce the risk of cutting and
40、 piercing injuries. 5.2.2 Tempered safety glass can be classified by the use of a pendulum impact test. When tested by this type of test, the safe breakage criteria employed for tempered safety glass is that the 10 largest crack free particles collected within 3 min after impact shall weigh no more
41、than the mass equivalent of 6 500 mm 2of the original test piece. 5.2.3 The quoted break criteria is taken from the standards given in Annex A. Annex A lists the test methods presently employed to classify this product. NOTE The safe breakage criteria are different from the fragmentation criteria us
42、ed to determine that the product complies with its definition. 5.3 Fragmentation This test method is employed to demonstrate that the tempered safety glass breaks in the manner expected of this product. The fragmentation test (see Clause 8) details the minimum number of crack- free particles that sh
43、all be in a set area, i.e. 50 mm 50 mm, and the dimension of the largest acceptable splinter. This fragmentation behaviour ignores any influence of support conditions and is a representation of the effect of the surface pre-stress. These properties are not size dependent. ISO 2017 All rights reserve
44、d 3 ISO 12540:2017(E) 6 Dimensions and tolerances 6.1 Nominal thickness and thickness tolerances The nominal thicknesses and thickness tolerances are those given in the relevant product standards (see Clause 4). Table 1 Nominal thicknesses and tolerances Nominal thickness mm Float glass tolerances m
45、m Patterned glass tolerances mm 2 0,2 Not manufactured 3 0,3 0,5 4 0,3 0,5 5 0,3 0,5 6 0,3 0,5 8 0,6 0,8 10 0,6 1,0 12 0,8 1,5 15 0,8 1,5 19 1,2 1,5 22 1,2 2,0 25 1,2 Not manufactured The thickness of a pane shall be determined as for the basic product. The measurement shall be taken at the centre o
46、f the four sides, and away from the area of any tong marks (see Figure 2), which may be present. 6.2 Width and length (sizes) 6.2.1 General When tempered safety glass dimensions are quoted for rectangular panes, the first dimension shall be the width, B, and the second dimension the length, H, as sh
47、own in Figure 1. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position. Figure 1 Examples of width, B, and length, H, relative to the pane shape4 ISO 2017 All rights reserved ISO 12540:2017(E) For tempered safety glass manufactured
48、 from patterned glass, the direction of the pattern should be specified relative to one of the dimensions. 6.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer should be consulted. 6.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the
49、 finished pane shall not be larger than the nominal dimensions increased by the tolerance, t, or smaller than the nominal dimensions reduced by the tolerance, t. Limits are given in Table 2. The squareness of rectangular glass panes is expressed by the difference between its diagonals. The difference between the two diagonal lengths of the pane of glass shall not be larger than the deviation limit, v, as specified in Table 3. Table 2 Tolerances, t, on width, B, and length, H
