1、BRITISH STANDARD BS 952-1:1995 Glass for glazing Part 1: Classification NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 952-1:1995 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the
2、authority of the Standards Board and comes into effect on 15 July 1995 BSI 12-1998 First published March 1941 Second edition July 1953 Third edition January 1964 Fourth edition February 1978 Fifth edition July 1995 The following BSI references relate to the work on this standard Committee reference
3、B/520/1 Draft for comment 93/110495 DC ISBN 0 580 24292 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/520, Glass and glazing in building, to Subcommittee B/520/1, Basic and transformed glass products, upon which the
4、 following bodies were represented: Association of Building Engineers Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Directorate) Flat Glass Manufacturers Association Glass and Glazing Federation Royal Institute of British Archit
5、ects Co-opted member Amendments issued since publication Amd. No. Date CommentsBS 952-1:1995 BSI 12-1998 i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1.1 Scope 1 1.2 Normative references 1 1.3 Definitions 1 1.4 Materials 2 1.5 Dimensions 3 Section 2. Annea
6、led flat soda lime-silicate glass 2.1 Float glass 5 2.2 Sheet glass 5 2.3 Patterned glass 6 2.4 Wired glass 6 2.5 Availability of wired glass 7 Section 3. Coated glass 3.1 General 9 3.2 Reflective float glass 9 3.3 Low-emissivity float glass 9 3.4 Anti-reflection float glass 9 3.5 Availability of co
7、ated glass 9 Section 4. Processed flat soda lime-silicate glass 4.1 Thermally toughened glass 11 4.2 Heat strengthened glass 11 4.3 Laminated glass 12 4.4 Insulating glass units 15 4.5 Silvered glass 15 Section 5. Miscellaneous soda lime-silicate glasses 5.1 Flashed or pot coloured sheet glass 17 5.
8、2 Diffuse reflection glass 17 5.3 Copper lights 17 5.4 Leaded lights 17 5.5 Bullions 17 5.6 Hollow glass blocks 17 5.7 Lenses: roof and pavement 17 5.8 Channel shaped glass 18 5.9 Mouth-blown antique and opalescent glasses 18 Section 6. Special composition glasses 6.1 Borosilicate glass 19 6.2 Glass
9、 ceramics 19 Table 1 Availability of clear float glass 5 Table 2 Availability of clear sheet glass 6 Table 3 Availability of clear patterned glass 6 Table 4 Availability of wired glass 7 Table 5 Availability of thermally toughened glass 12 Table 6 Availability of pvb laminated glass 14 Table 7 Avail
10、ability of flashed and pot coloured sheet glass 18 List of references Inside back coverBS 952-1:1995 ii BSI 12-1998 Foreword This Part of BS 952 was prepared by Subcommittee B/520/1. It has been used for many years as a valuable source of background and contractual information by architects, specifi
11、ers and other glass users. The first edition of this British Standard was published in 1941 and it has since been revised in 1953, 1964 and 1978, principally to take account of product developments. This present revision, which has been prepared under the direction of the Sector Board for Building a
12、nd Civil Engineering, supersedes the 1978 edition, which is withdrawn. It brings up to date the information on glass types, thicknesses, mass/unit area and normally available maximum sizes. New sections have been added covering coated glass, borosilicate glass and glass ceramics to reflect the incre
13、asing use of these products. Work is currently in progress within CEN/TC 129, Glass in building, to produce European Standards for the various glass types. The first product standards, dealing with basic soda lime-silicate glasses (BS EN 572-1 to BS EN 572-7), have recently been published. Further s
14、tandards covering all of the major processed glass products and glass compositions will be published as European Standards over the next few years and adopted as British Standards, thus augmenting the information within this standard. A British Standard does not purport to include all the necessary
15、provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to
16、21 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 952-1:1995 BSI 12-1998 1 Section 1. General 1 1.1 Scope This Part of BS 952 classifies glass for use in building into three glass compositions: the commonly used soda lime-silicate
17、 glass, borosilicate glass and glass ceramics. Terms and definitions, together with details of nominal thickness, thickness tolerance, mass/unit area and the normally available maximum sizes are given. 1.2 Normative references This Part of BS 952 incorporates, by reference, provisions from other pub
18、lications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to, or revisions of, any of the cited publication apply to this Part of
19、 BS 952 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1.3 Definitions For the purposes of this British Standard, the following definitions apply. 1.3.1 annealed glass glass
20、that has been subjected to controlled cooling to reduce the presence of residual stresses in the glass thus allowing easy cutting. It is ordinary glass which includes float glass, sheet glass, patterned glass and wired glass and is independent of the glass composition 1.3.2 off-line coating process
21、whereby individual pieces of glass, e.g. annealed, toughened, heat strengthened or laminated, are coated 1.3.3 on-line coating process whereby the coating is applied to the surface of a continually moving ribbon of glass during the manufacturing process, prior to the glass being initially cut 1.3.4
22、safety glass glass which when tested in accordance with BS 6206 either does not break, or breaks safely, and affords protection from cutting and piercing injuries in the event of accidental human impact 1.3.5 security glass glass that affords protection against a specified level of attack see 4.3.3b
23、) 1.3.6 translucent glass glass that transmits light with varying degrees of diffusion so that vision is not clear NOTE The diffusion may be produced either by patterning the surface during manufacture, or by surface treatment after manufacture, i.e. sandblasting, acid etching, etc. These processes
24、are dealt with in BS 952-2. 1.3.7 transparent glass glass that transmits light and permits clear vision through itBS 952-1:1995 2 BSI 12-1998 Section 1 1.4 Materials 1.4.1 General All glasses for use in building (see 1.4.2, 1.4.3 and 1.4.4) should be such that the physical and chemical characteristi
25、cs can be considered constant over time. They should be: a) insensitive to photochemical effects, i.e. the spectral properties (transmission of light and solar energy) are not modified by direct or indirect solar radiation. b) insensitive to attack from the environment, i.e. surface deterioration wi
26、ll not develop after glazing under normal conditions of use, provided the glass is cleaned at reasonable intervals. 1.4.2 Soda lime-silicate glass (see BS EN 572-1) The proportions by mass of the principal constituents of all the soda lime-silicate glass products covered by BS EN 572 and this standa
27、rd are: 1.4.3 Borosilicate glass The proportions by mass of the principal constituents of all the borosilicate glass products covered by this standard are: 1.4.4 Glass ceramics The proportions by mass of the principal constituents of all the glass ceramic products covered by this standard are: Silic
28、on dioxide SiO 2 69 % to 74 % Calcium oxide CaO 5 % to 12 % Sodium oxide Na 2 O 12 % to 16 % Magnesium oxide MgO 0 % to 6 % Aluminium oxide Al 2 O 3 0 % to 3 % Silicon dioxide SiO 2 70 % to 87 % Boron oxide B 2 O 3 7 % to 15 % Sodium oxide Na 2 O Potassium oxide K 2 O1 % t o 8 % Aluminium oxide Al 2
29、 O 3 Others 0 % to 8 % Silicon dioxide SiO 2 50 % to 80 % Aluminium oxide Al 2 O 3 15 % to 27 % Lithium oxide Li 2 O0 % t o 5 % Zinc oxide ZnO 1 % to 5 % Titanium dioxide TiO 2 0 % to 5 % Zirconium dioxide ZrO 2 0 % to 5 % Magnesium oxide MgO Calcium oxide CaO 0 % to 8 % Barium oxide BaO Sodium oxid
30、e Na 2 O Potassium oxide K 2 O0 % t o 2 % Others 0 % to 5 %BS 952-1:1995 BSI 12-1998 3 Section 1 1.5 Dimensions 1.5.1 Thickness 1.5.1.1 General The methods for the determination of glass thickness are given in the relevant product standard, e.g. BS EN 572-2 for soda lime-silicate float glass. 1.5.1.
31、2 Tolerances The tolerances on thickness are given in the appropriate product standard. They are reproduced in this standard in tables relating to the availability of that particular product. 1.5.2 Length, width and squareness 1.5.2.1 General The method for the determination of length, width and squ
32、areness are given in the relevant product standard, e.g. BS EN 572-2 for soda lime-silicate float glass. 1.5.2.2 Tolerances These are given in the relevant product standard. They can relate to both stock and finished sizes depending on the product. They are not reproduced in this standard.4 blankBS
33、952-1:1995 BSI 12-1998 5 Section 2. Annealed flat soda-lime-silicate glass 2 2.1 Float glass (see BS EN 572-2) 2.1.1 Clear float glass This is transparent glass, the surfaces of which are flat and parallel so that they provide clear, undistorted vision and reflection. Float glass is manufactured by
34、allowing glass from a tank furnace to flow across a bath of molten metal. 2.1.2 Body tinted float glass This is transparent glass in which the whole body of the glass is tinted. Tints available are green, grey, bronze and blue. Thicknesses available are 3, 4, 5, 6, 8, 10 and 12 mm; whether all thick
35、nesses are available in each tint depends on the manufacturer. Normal maximum sizes may differ from those for clear float glass. 2.1.3 Availability of clear float glass Table 1 gives the range of nominal thicknesses, thickness tolerances, mass/unit area and maximum sizes normally available for clear
36、 float glass. Table 1 Availability of clear float glass (see 2.1.3) 2.2 Sheet glass (see BS EN 572-4) 2.2.1 Clear sheet glass This is transparent glass manufactured by the flat drawn process. Sheet glass has natural fire-finished surfaces but, because the two surfaces are never perfectly flat and pa
37、rallel, there is always some distortion of vision and reflection. 2.2.2 Body tinted sheet glass This is transparent glass in which the whole body of the glass is tinted. Such glass reduces solar radiation transmission by increased absorption. Generally available are green, grey and bronze tints. For
38、 information on thicknesses and normal maximum sizes the manufacturers should be consulted. Nominal thickness Tolerance on thickness Approximate mass/unit area Normal maximum size mm mm kg/m 2 mm 3 0.2 7.5 3 210 6 000 4 0.2 10.0 3 210 6 000 5 0.2 12.5 3 210 6 000 6 0.2 15.0 3 210 6 000 8 0.3 20.0 3
39、210 6 000 10 0.3 25.0 3 210 6 000 12 0.3 30.0 3 210 6 000 15 0.5 37.5 3 210 6 000 19 1.0 47.5 3 210 6 000 25 1.0 62.5 3 210 5 100 NOTE Mass/unit area (i.e. kg/m 2 ) was traditionally referred to as “weight” in the glass and glazing industries.BS 952-1:1995 6 BSI 12-1998 Section 2 2.2.3 Availability
40、of clear sheet glass Table 2 includes the range of nominal thicknesses, thickness tolerances, mass/unit area and maximum sizes normally available for clear sheet glass. Table 2 Availability of clear sheet glass (see 2.2.3) 2.3 Patterned glass (see BS EN 572-5) 2.3.1 Clear patterned glass This is tra
41、nslucent glass manufactured by the rolling process. Usually the deeper the pattern, the greater the obscuration and diffusion. 2.3.2 Body tinted patterned glass Body tinted patterned glass is similar to clear patterned glass but with the whole of the glass tinted during manufacture. The tints are in
42、corporated either to give solar control properties or for a decorative purpose. Thicknesses and tints available are dependent on the manufacturer. Maximum sizes available may differ from those of clear patterned glass. 2.3.3 Availability of clear patterned glass Table 3 includes the range of nominal
43、 thicknesses, thickness tolerances, mass/unit area and maximum sizes normally available for clear patterned glass. Table 3 Availability of clear patterned glass (see 2.3.3) 2.4 Wired glass 2.4.1 General Wired glass has steel wire mesh completely embedded in it. Only one type of wire mesh is used and
44、 this is welded at all intersections, i.e. Georgian (12.5 mm square). Wired glass, like other annealed glass, is liable to crack when subjected to heavy loading, impact or thermal shock. The embedded wire, however, holds the glass together and breaks only under a severe blow. Wired glass can provide
45、 a fire resistance of up to 2 h in an appropriate pane size and frame (see PD 6512). The process of manufacture may result in some of the meshes being distorted. In considering the use of wired glass in situations demanding a good appearance it should be borne in mind that glass having a truly regul
46、ar arrangement of wires may not always be obtainable. However, adjacent panels can be lined up one way, if required, by special selection. Nominal thickness Tolerance on thickness Approximate mass/unit area Normal maximum size mm mm kg/m 2 mm 3 0.3 7.5 2 440 1 320 4 0.3 10.0 2 880 2 130 5 0.3 12.5 2
47、 440 2 130 6 0.3 15.0 2 440 2 130 Nominal thickness Tolerance on thickness Approximate mass/unit area Normal maximum size mm mm kg/m 2 mm 3 0.5 7.5 2 140 1 320 4 0.5 10.0 2 140 1 320 6 0.5 15.0 2 140 1 320 8 0.8 20.0 2 140 1 320 10 1.0 25.0 2 140 1 320BS 952-1:1995 BSI 12-1998 7 Section 2 2.4.2 Wire
48、d patterned glass (see BS EN 572-6) This is translucent wired glass with a patterned surface. 2.4.3 Polished wired glass (see BS EN 572-3) This is transparent wired glass produced by grinding and polishing wired patterned glass. 2.4.4 Safety wired glass This is wired glass containing a stronger wire
49、 which allows the product to be classified as a safety glass. Available in both patterned and polished forms. 2.5 Availability of wired glass Table 4 includes the range of nominal thicknesses, thickness tolerances, mass/unit area and maximum sizes normally available for ordinary wired and safety wired glass. Table 4 Availability of wired glass (see 2.5) Type Nominal thickness Tolerance on thickness Approximate mass/unit area Normal maximum size mm mm kg/m 2 mm Ordinary wired Patterned 7 0.7 1
