1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 0-626-18454-1 SANS 50572-1:2006Edition 2 EN 572-1:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Glass in building Basic soda lime silicate glass prod
4、ucts Part 1: Definitions and general physical and mechanical properties This national standard is the identical implementation of EN 572-1:2004 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag
5、 x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50572-1:2006 Edition 2 EN 572-1:2004 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanS
6、A SC 5120.61C, Construction standards Glazing materials in buildings, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This part of SANS 50572 was published in December 2006. This SANS edition cancels and replaces the first SABS edition (S
7、ABS EN 572-1:1994). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 572-1June 2004ICS 81.040.20; 01.040.81 Supersedes EN 572-1:1994English versionGlass in building - Basic soda lime silicate glass products - Part1: Definitions and general physical and mechanical propertiesVerre dans la constructio
8、n - Produits de base : verre desilicate sodo-calcique - Partie 1 : Dfinitions et propritsphysiques et mcaniques gnralesGlas im Bauwesen - Basiserzeugnisse aus Kalk-Natronsilicatglas - Teil 1: Definitionen und allgemeinephysikalische und mechanische EigenschaftenThis European Standard was approved by
9、 CEN on 1 April 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards m
10、ay be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Cent
11、ral Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Polan
12、d, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means rese
13、rvedworldwide for CEN national Members.Ref. No. EN 572-1:2004: ESANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 Gener
14、al principles5 5 Chemical composition 6 5.1 General6 5.2 Tint 6 6 Physical and mechanical characteristics6 6.1 General characteristics .6 6.2 Designation of clear glass 7 6.2.1 General7 6.2.2 Clear transparent glass.7 6.2.3 Clear translucent glass .8 6.3 Stability of physical and chemical characteri
15、stics.9 6.4 General quality criteria and their evaluation.9 6.4.1 Optical.9 6.4.2 Appearance 9 Bibliography 10 SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1: 2004 (E) 3 Foreword This document (EN 572-1:2004) has be
16、en prepared by Technical Committee CEN/TC 129 “Glass in building“, the secretariat of which is held by IBN. This document supersedes EN 572-1:1994. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by
17、December 2004, and conflicting national standards shall be withdrawn at the latest by December 2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). According to t
18、he CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem
19、bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1:2004 (E) 4 1 Scope This Part of this European St
20、andard specifies and classifies basic glass products, indicates their chemical composition, their main physical and mechanical characteristics and defines their general quality criteria. Specific dimensions and dimensional tolerances, description of faults, quality limits and designation for each ba
21、sic product type are not included in this Part, but are given in other Parts of this standard specific to each product type: EN 572-2 Float glass EN 572-3 Polished wired glass EN 572-4 Drawn sheet glass EN 572-5 Patterned glass EN 572-6 Wired patterned glass EN 572-7 Wired or unwired channel shaped
22、glass EN 572-8 Supplied and final cut sizes EN 572-9 Evaluation of conformity/Product standard 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest ed
23、ition of the referenced document (including any amendments) applies. EN 410, Glass in building Determination of luminous and solar characteristics of glazing EN 572-2, Glass in building Basic soda lime silicate glass products Part 2: Float glass EN 572-3, Glass in building Basic soda lime silicate g
24、lass products Part 3: Polished wired glass EN 572-4, Glass in building Basic soda lime silicate glass products Part 4: Drawn sheet glass EN 572-5, Glass in building Basic soda lime silicate glass products Part 5: Patterned glass EN 572-6, Glass in building Basic soda lime silicate glass products Par
25、t 6: Wired patterned glass EN 572-7, Glass in building Basic soda lime silicate glass products Part 7: Wired or unwired channel shaped glass EN 572-8, Glass in building Basic soda lime silicate glass products Part 8: Supplied and final cut sizes EN 572-9, Glass in building Basic soda lime silicate g
26、lass products Part 9: Evaluation of conformity/Product standard prEN 13474, Glass in building Design of glass panes SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1: 2004 (E) 5 3 Terms and definitions For the purposes
27、 of this European Standard, the following terms and definitions apply. 3.1 float flat, transparent, clear or tinted soda-lime silicate glass having parallel and polished faces obtained by continuous casting and floatation on a metal bath NOTE In French called glace and in German Floatglas. 3.2 drawn
28、 sheet glass flat, transparent, clear or tinted soda-lime silicate glass obtained by continuous drawing, initially vertically, of a regular thickness and with the two surfaces fire polished NOTE Drawn sheet glass covers three products; new antique drawn sheet glass, drawn sheet glass for renovation
29、and drawn sheet glass with minimum visual faults. 3.3 patterned glass flat, translucent, clear or tinted soda-lime silicate glass obtained by continuous casting and rolling 3.4 wired patterned glass flat, translucent, clear or tinted soda-lime silicate glass obtained by continuous casting and rollin
30、g which has a steel mesh welded at all intersections incorporated in the glass during its manufacturing process. The surfaces may be either patterned or plain NOTE In German wired patterned glass with plain surfaces is called Drahtglas. 3.5 polished wired glass flat, transparent, clear soda-lime sil
31、icate glass having parallel and polished faces obtained by grinding and polishing the faces of wired patterned glass 3.6 wired or unwired channel-shaped glass translucent, clear or tinted soda-lime silicate glass, wired or unwired, obtained by continuous casting and rolling, which is formed into a U
32、 shape during the manufacturing process 4 General principles EN 572-1 shall be read in conjunction with Parts 2 to 9 of this European Standard. SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1:2004 (E) 6 5 Chemical co
33、mposition 5.1 General The basic glass products covered by this standard are all manufactured from soda-lime silicate glass. The magnitude of the proportions by mass of the principal constituents of soda-lime silicate glass covered by this standard is as follows: Silicon dioxide (SiO2) 69 % to 74 % C
34、alcium oxide (CaO) 5 % to 14 % Sodium oxide (Na2O) 10 % to 16 % Magnesium oxide (MgO) 0 % to 6 % Aluminium oxide (Al2O3) 0 % to 3 % Others 0 % to 5 % In addition to the above general composition, these glasses may also contain small quantities of other substances. 5.2 Tint Body tinted glass is obtai
35、ned by the addition of suitable materials. 6 Physical and mechanical characteristics 6.1 General characteristics Conventional numerical values for the physical and mechanical characteristics of basic glass products are given in Table 1. These values, for normal annealed glass without any further tou
36、ghening are not precise requirements with which the glass shall strictly comply, but are the generally accepted figures for use in calculations where a high degree of accuracy is not required. SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clien
37、ts of the SABS .EN 572-1: 2004 (E) 7 Table 1 General characteristic values Characteristic Symbol Numerical value and unit Density (at 18 C) 2 500 kg/m3 Hardness (Knoop) HK0,1/206Gpa Youngs modulus 7 1010Pa (modulus of elasticity) Poissons ratio Characteristic bending strength fg,k0,2 45 x 106 Pa a S
38、pecific heat capacity C 0,72 103J/(kgK) Average coefficient of linear expansion between 20 C and 300 C 9 10-6K-1 Resistance against temperature differential and sudden temperature change Thermal conductivity 40 K b1 W/(mK) Mean refractive index to visible radiation (380 nm to 780 nm) N 1,5 Emissivit
39、y (corrected) 0,837 aThe characteristic bending strength shall be used in conjunction with the design method given in prEN 13474. bGenerally accepted value that is influenced by edge quality and glass type. 6.2 Designation of clear glass 6.2.1 General A glass product is designated as clear glass whe
40、n it is not tinted and when the light transmittance of the glass material unmodified by the possible presence of a coating or surface roughness of, for example, a patterned glass complies with 5.2.2 and 5.2.3. In order to measure the light transmittance characteristics of glass, to determine whether
41、 it can be designated as a clear glass, it is necessary, in some cases, to carry out a pretreatment: coatings on smooth surfaces have to be eliminated, without modifying the thickness of the glass substrate; rough surfaces, with or without coatings, have to be eliminated by smoothing and polishing.
42、The thickness of the glass will be modified by this process. The light transmittance of the glass substrate shall be measured with its surfaces in a polished condition. NOTE The light transmittance values given in 5.2.2 and 5.2.3 are not suitable for design. They are values used only for the designa
43、tion of clear glass and exclude the effects of coatings and of surface roughness. The values of light transmittance used for design can be obtained from the glass manufacturer. They are determined in accordance with EN 410. 6.2.2 Clear transparent glass A transparent glass product is designated as c
44、lear glass when it is not tinted and when its light transmittance: after any necessary pretreatment; measured according to EN 410; and SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1:2004 (E) 8 rounded to the nearest
45、 0,01; is greater than or equal to the value given in Table 2 for the nominal thickness of the glass product. NOTE The limiting value given in Table 2 is appropriate provided that the measured thickness of the glass product is within the allowable tolerances for the nominal thickness of that glass p
46、roduct. Table 2 Minimum light transmittance values for designating a transparent glass product as clear glass Nominal thickness in mm Minimum value of light transmittance 2 0,89 3 0,88 4 0,87 5 0,86 6 0,85 8 0,83 10 0,81 12 0,79 15 0,76 19 0,72 25 0,67 6.2.3 Clear translucent glass A translucent gla
47、ss product is designated as clear glass when it is not tinted and when its light transmittance: after any necessary pretreatment; measured according to EN 410; and rounded to the nearest 0,01; is greater than or equal to the value obtained by linear interpolation from Table 3, for the measured thick
48、ness of the specimen. NOTE The limiting value will vary with the exact thickness of the specimen after its pretreatment. Table 3 Minimum light transmittance values for designating a translucent glass product as clear glass Thickness in mm Minimum value of light transmittance 3 0,83 4 0,82 5 0,81 6 0
49、,80 7 0,79 8 0,78 10 0,76 SANS 50572-1:2006This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 572-1: 2004 (E) 9 6.3 Stability of physical and chemical characteristics For basic glass products, the physical and chemical characteristics can be considered as remaining constant over time. a) Since glass is insensitive to photochemical effects, the spectral properties (transmission of light and solar energy) of the basic glass pro
