1、 ISO 2017 Glass in building Heat soaked tempered soda lime silicate safety glass Verre dans la construction Verre de scurit de silicate sodocalcique tremp et trait INTERNATIONAL STANDARD ISO 20657 First edition 2017-03 Reference number ISO 20657:2017(E) ISO 20657:2017(E)ii ISO 2017 All rights reserv
2、ed COPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intr
3、anet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.o
4、rg www.iso.org ISO 20657:2017(E)Foreword v Introduction vi 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Glass products . 3 5 Manufacturing processes. 3 5.1 General . 3 5.2 Tempering process 3 5.3 Heat soak process cycles 4 5.3.1 Off-line process . 4 5.3.2 In-line process 7 6 F
5、racture characteristics 8 6.1 General . 8 6.2 Accidental human impact 8 6.3 Fragmentation . 8 7 Dimensions and tolerances . 9 7.1 Nominal thickness and thickness tolerances 9 7.2 Width and length (sizes) 9 7.2.1 General 9 7.2.2 Maximum and minimum sizes 10 7.2.3 Tolerances and squareness 10 7.2.4 Ed
6、ge deformation produced by vertical tempering .11 7.3 Flatness .11 7.3.1 General.11 7.3.2 Measurement of overall bow 13 7.3.3 Measurement of wave or roller wave distortion .14 7.3.4 Measurement of edge lift (only for heat soaked tempered safety glass which was horizontally tempered) .15 7.3.5 Measur
7、ement of perimeter deformation of glass produced by air cushion tempering process .16 7.3.6 Measurement of local distortion (only for heat soaked tempered safety glass which was vertically tempered) 16 7.3.7 Limitation on overall bow, roller waves and edge lift for heat soaked tempered safety glass
8、which was horizontally tempered .17 7.3.8 Limitation on overall bow, wave and perimeter deformation for heat soaked tempered safety glass manufactured by air cushion process .18 7.3.9 Limitation on overall bow and local distortion for heat soaked tempered safety glass which was vertically tempered 1
9、8 7.3.10 Other distortions 18 8 Edge work, holes, notches and cut-outs.19 8.1 General 19 8.2 Edge working of glass for tempering 19 8.3 Profiled edges20 8.4 Round holes 20 8.4.1 General.20 8.4.2 Diameter of holes .20 8.4.3 Limitations on position of holes 20 8.4.4 Tolerances on hole diameters 21 8.4
10、.5 Tolerances on position of holes 22 8.5 Holes/others 23 ISO 2017 All rights reserved iii Contents Page ISO 20657:2017(E)8.6 Notches and cut-outs 23 8.7 Shaped panes .23 9 Fragmentation test 23 9.1 General 23 9.2 Dimensions and number of test specimens 23 9.3 Test procedure 24 9.4 Assessment of fra
11、gmentation 24 9.5 Minimum values from the particle count 25 9.6 Selection of the longest particle 25 9.7 Maximum length of longest particle 25 9.8 Test Report 26 10 Other physical characteristics .26 10.1 Optical distortion .26 10.1.1 Heat soaked tempered safety glass produced by vertical tempering
12、26 10.1.2 Heat soaked tempered safety glass produced by horizontal tempering 26 10.2 Anisotropy (iridescence) .26 10.3 Thermal durability 26 10.4 Mechanical strength 27 10.5 Surface pre-stress 27 11 Marking .27 12 Packaging 28 Annex A (informative) Pendulum impact test methods 29 Annex B (informativ
13、e) Alternative method for the measurement of roller wave distortion 30 Annex C (informative) Example of particle count 32 Annex D (informative) Method for the measurement of the surface pre-stress of heat soaked tempered safety glass 34 Annex E (informative) In-line heat soak process control .36 Ann
14、ex F (informative) Heat soak process system calibration test .38 Bibliography .48 iv ISO 2017 All rights reserved ISO 20657:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Inte
15、rnational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison wi
16、th ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directive
17、s, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives). Attention is drawn to the possibility that som
18、e of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declara
19、tions received (see www .iso .org/ patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity
20、 assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: w w w . i s o .org/ iso/ foreword .html. This document was prepared by Technical Committee ISO/TC 160, Glass in building, Subcommi
21、ttee SC 1, Product considerations. ISO 2017 All rights reserved v ISO 20657:2017(E) Introduction Heat soaked tempered soda lime silicate safety glass has a safer breakage behaviour when compared with annealed glass. This behaviour is a direct result of the high surface pre-stress. It also has a know
22、n level of residual risk of spontaneous breakage arising from the possible presence of critical nickel sulfide (NiS) inclusions in the thermally toughened soda lime silicate glass. Heat soaked tempered soda lime silicate safety glass has a known behaviour under accident human impact together with kn
23、own mechanical and thermal stress resistance. Other requirements, not specified in this document, can apply to heat soaked tempered 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.
24、 The additional requirements are specified in the appropriate glass product standard. Heat soaked tempered soda lime silicate safety glass, in this case, does not lose its mechanical or thermal characteristics. NOTE 1 ISO/TC 160/SC 2 is producing standards for the determination of the design strengt
25、h of glass and is preparing a design method. NOTE 2 In Europe, instead of “heat soaked tempered”, the term “heat soaked thermally toughened” is used.vi ISO 2017 All rights reserved Glass in building Heat soaked tempered soda lime silicate safety glass 1 Scope This document specifies product definiti
26、ons, product characteristics, i.e. tolerances, flatness, edgework, etc., fracture characteristics, including fragmentation, and the physical and mechanical characteristics of flat heat soaked tempered soda lime silicate safety glass for use in buildings. This document does not cover curved (bent) gl
27、ass according ISO 11485. 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 document. For dated references, only the edition cited applies. For undated references, the latest edition of the refer
28、enced 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 (four point bending) 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitions ap
29、ply. 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 heat soaked tempered soda lime silicate safety glas
30、s heat soaked tempered safety glass glass within which a permanent surface compressive stress, additionally to the basic mechanical strength, has been induced by a controlled heating and cooling process in order to give it greatly increased resistance to mechanical and thermal stress and prescribed
31、fragmentation characteristics and which has a known level of residual risk (3.2) of spontaneous breakage due to the presence of critical nickel sulphide (NiS) inclusions 3.2 level of residual risk risk of spontaneous breakage of heat soaked thermally toughened soda lime silicate safety glass, on a s
32、tatistical basis, due to the presence of critical nickel sulphide inclusions Note 1 to entry: It is considered that the level of residual risk is no more than one breakage per 400 tonnes of heat soaked thermally toughened soda lime silicate safety glass 678 . 3.3 f l a t h e a t s o a k e d t e m p
33、e r e d s a f e t y g l a s s heat soaked tempered (thermally toughened) glass which has not been deliberately given a specific profile during manufacture INTERNATIONAL ST ANDARD ISO 20657:2017(E) ISO 2017 All rights reserved 1 ISO 20657:2017(E) 3.4 enamelled heat soaked tempered safety glass heat s
34、oaked tempered (thermally toughened) glass 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 a
35、pplication or discontinuous, e.g. screen printing. 3.5 horizontal tempering process process in which the glass is supported on horizontal rollers 3.6 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
36、 glass will be between horizontal and 45 of horizontal. 3.7 vertical tempering process process in which the glass is suspended by tongs 3.8 edge deformation deformation of the edge caused by the tong marks 3.9 edge lift edge dip distortion produced in heat soaked tempered safety glass (3.1) which wa
37、s horizontally tempered, at the leading and trailing edge of the plate, as a result of the glass during the tempering (toughening) process not being supported by a roller Note 1 to entry: This is a distortion produced by a deviation from surface flatness. 3.10 perimeter deformation distortion around
38、 the edge of heat soaked tempered safety glass (3.1) manufactured by air cushion process (3.6) 3.11 local distortion local deformation underneath the tong marks of heat soaked tempered safety glass (3.1) which was vertically tempered 3.12 overall bow deformation of the whole pane of heat soaked temp
39、ered safety glass (3.1) caused by the heating and cooling process 3.13 roller wave distortion periodic distortion produced in heat soaked tempered safety glass (3.1) which was horizontally tempered as a result of the glass during tempering process being in contact with the rollers Note 1 to entry: T
40、his is a surface distortion produced by a reduction in surface flatness.2 ISO 2017 All rights reserved ISO 20657:2017(E) 3.14 wave distortion distortion produced in heat soaked tempered safety glass (3.1) manufactured by air cushion process (3.6) as a result of the tempering process 3.15 heat soak p
41、rocess heat treatment after the tempering process during which majority of NiS inclusions is removed resulting in a known level of critical NiS inclusions in the heat soaked tempered soda lime silicate safety glass 3.16 in-line heat soak process heat soak process (3.15) which follows immediately aft
42、er the quenching process whereby the glass temperature is directly reduced from quenching to the heat soak temperature in an in-line heat soak oven 3.17 off-line heat soak process heat soak process (3.15) carried out after the quenching process whereby the glass is cooled down to room temperature an
43、d heated up again to the heat soak temperature in an off-line heat soak oven 4 Glass products Heat soaked 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 acc
44、ording to ISO 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 possibl
45、e. 5 Manufacturing processes 5.1 General Heat soaked tempered safety glass is manufactured as follows. Basic soda lime silicate glass products (see Clause 4) are cut to size, shaped and edgeworked (see Clause 8). The prepared glass panes are then tempered (see 5.2). The tempered panes are then subje
46、cted to an off-line or in-line heat soak process cycle (see 5.3.1 and 5.3.2) After manufacture the heat soaked tempered safety glass shall comply with the fragmentation test (see Clause 9) and mechanical strength requirement (see 10.4). 5.2 Tempering process The cut, shaped and edgeworked glasses ar
47、e tempered. The heat soaked tempered glass shall comply with the flatness criteria for horizontal or vertical tempering or the air cushion process (see 7.3). ISO 2017 All rights reserved 3 ISO 20657:2017(E) The heat soaked tempered safety glass shall have a level of fragmentation that will ensure th
48、at after the glass has been through the heat soak process, and subsequently tested to the fragmentation test (see Clause 9), it shall comply with 9.5. 5.3 Heat soak process cycles 5.3.1 Off-line process 5.3.1.1 General The heat soak process cycle consists of a heating phase, a holding phase and a co
49、oling phase (see Figure 1). Key T glass temperature at any point, C t time, h 1 first glass to reach 250 C 2 last glass to reach 250 C a heating phase b holding phase c cooling phase d ambient temperature Figure 1 Heat soak process cycle 5.3.1.2 Heating phase The heating phase commences with all the glasses at ambient temperature and concludes when the surface temperature of the last glass reaches 250 C. The maximum heating rate is 3 C per min. The time to reach this temperature is defined in the calibration proce
