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1、A Reference number ISO 3585:1998(E) INTERNATIONAL STANDARD ISO 3585 Third edition 1998-07-01 Borosilicate glass 3.3 Properties Verre borosilicat 3.3 Proprits ISO 3585:1998(E) ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any fo
2、rm or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetcentraliso.ch X.400c=ch; a=400net; p=iso; o=isocs; s=central Print
3、ed in Switzerland ii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a
4、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 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commissio
5、n (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International
6、 Standard ISO 3585 was prepared by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, Subcommittee 5, Quality of glassware. This third edition cancels and replaces the second edition (ISO 3585:1991), which has been technically revised. Annex A of this International Standard i
7、s for information only. -,-,- ISOISO 3585:1998(E) iii Introduction It is the purpose of this International Standard to define and facilitate the identification of a type of glass appropriate for laboratory glassware, glass plant, pipeline and fittings. The design of glass components is dependent on
8、the coefficient of mean linear thermal expansion and the ultimate tensile strength. Utilization requires not only a product design which is satisfactory within temperature and pressure limitations, but one which will also satisfy certain criteria for chemical resistance. Therefore, the glass, as dis
9、tinct from the components made from it, shall satisfy certain specified requirements. However, it is accepted that methods of working the glass to achieve the various forms required in practice can affect the properties of the glass. The glass used for this application, referred to as “borosilicate
10、glass 3.3”, is resistant to both heat and chemicals. Its heat resistance characteristics are defined by the nominal values given for physical properties. Its chemical resistance characteristics are specified within stated limits, using standard test methods to which reference is made in this Interna
11、tional Standard. The glass is deemed to be satisfactory for the construction of laboratory glassware, glass plant, pipeline and fittings, while for the glass components themselves, other relevant International Standards should be consulted. Where nominal properties are given, they relate, unless oth
12、erwise specified, to the range of temperatures of 20 C to 300 C. However, this does not imply that products manufactured from this glass can necessarily be used freely within this range, nor that they cannot be used outside this range. -,-,- INTERNATIONAL STANDARD ISOISO 3585:1998(E) 1 Borosilicate
13、glass 3.3 Properties 1 Scope This International Standard specifies the characteristics of a type of glass designated “borosilicate glass 3.3” used for the construction of laboratory glassware, glass plant, pipeline and fittings. NOTE Annex A lists related International Standards. 2 Normative referen
14、ces The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Stan
15、dard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 695:1991, Glass Resistance to attack by a boiling aqueous solution of mixed alkali Metho
16、d of test and classification. ISO 719:1985, Glass Hydrolytic resistance of glass grains at 98 C Method of test and classification. ISO 720:1985, Glass Hydrolytic resistance of glass grains at 121 C Method of test and classification. ISO 1776:1985, Glass Resistance to attack by hydrochloric acid at 1
17、00 C Flame emission or flame atomic absorption spectrometric method. ISO 7884-2:1987, Glass Viscosity and viscometric fixed points Part 2: Determination of viscosity by rotation viscometers. ISO 7884-3:1987, Glass Viscosity and viscometric fixed points Part 3: Determination of viscosity by fibre elo
18、ngation viscometer. ISO 7884-4:1987, Glass Viscosity and viscometric fixed points Part 4: Determination of viscosity by beam bending. ISO 7884-8:1987, Glass Viscosity and viscometric fixed points Part 8: Determination of (dilatometric) transformation temperature. ISO 7991:1987, Glass Determination o
19、f coefficient of mean linear thermal expansion. 3 General requirements The glass shall be annealed to commercially acceptable quality and shall be homogeneous enough to be free from larger inclusions which can affect the mechanical strength (i.e. refractory inclusions). -,-,- ISO 3585:1998(E) ISO 2
20、4 Chemical resistance 4.1 Hydrolytic resistance at 98 C Hydrolytic resistance shall conform to grain class ISO 719-HGB 1. For test method see ISO 719. 4.2 Hydrolytic resistance at 121 C Hydrolytic resistance shall conform to grain class ISO 720-HGA 1. For test method see ISO 720. 4.3 Acid resistance
21、 Acid resistance shall be equivalent to a mass of sodium oxide (Na2O) 100 mg per 1 dm2 of glass when the glass “as a material” is tested (including preliminary acid treatment). For test method see ISO 1776. 4.4 Resistance to attack by a boiling aqueous solution of mixed alkali Alkali resistance shal
22、l conform to class ISO 695-A2 or better. For test method see ISO 695. 5 Physical properties NOTE Property values without limiting deviations (see 5.3, 5.4 and 5.10 to 5.12) are given for guidance only. They do not specify borosilicate glass 3.3. Therefore, no test method is stated. 5.1 Coefficient o
23、f mean linear thermal expansion, a a (20 C; 300 C) shall be equal to (3,3 0,1) 10-6 K-1. For test method see ISO 7991 (reference method). 5.2 Density at 20 C, r r shall be equal to 2,23 g.cm-3 0,02 g.cm-3. 5.3 Mean thermal conductivity (20 C to 200 C), l l shall be equal to 1,2 W(m-1.K-1). 5.4 Mean
24、specific heat capacity at constant pressure (20 C to 100 C), cp cp shall be equal to 0,8 103 J(kg-1.K-1). -,-,- ISO ISO 3585:1998(E) 3 5.5 Viscosity/temperature behaviour The viscosity, h, and its relationship to temperature, T, is characterized by the following (equilibrium) viscosity/temperature p
25、oints: h1 = 104 dPa.s at a temperature of T1 = (1 260 20) C; h2 = 107,6 dPa.s at a temperature of T2 = (825 10) C; h3 = 1013 dPa.s at a temperature of T3 = (560 10) C. Measuring methods shall be as follows: rotation viscometer, see ISO 7884-2; fibre elongation viscometer, see ISO 7884-3; beam bendin
26、g viscometer, see ISO 7884-4. NOTE The measurement data of three equilibrium viscosities allow calculation of the viscosity/temperature relationship by the VFT equation see equation (2) of ISO 7884-1:1987 for interpolations. The temperature T1, T2 and T3 more or less correspond to the working point,
27、 softening point and annealing point, respectively (see ISO 7884-1), although at least the latter two do not characterize well-defined equilibrium viscosities and do not fit into a VFT curve. 5.6 Transformation temperature, tg tg shall be equal to 525 C 15 C. For test method see ISO 7884-8 (referenc
28、e method). 5.7 Modulus of elasticity, E E shall be equal to 64 kN.mm-2 (= 64 103 MPa). 5.8 Poissons ratio, m m shall be equal to 0,20. 5.9 Ultimate tensile strength, Rm Rm shall be equal to 35 N.mm-2 to 100 N.mm-2 (= 35 MPa to 100 MPa). The wide range of ultimate tensile strength given indicates the
29、 wide scatter of test results obtainable with normal commercial glass to which this specification relates, when smooth, pressed, drawn or fire-polished test specimens are used. Surface damage will reduce the failure stresses. The figures given are not intended as a guide to design stresses. -,-,- IS
30、O 3585:1998(E) ISO 4 Annex A (informative) Bibliography 1ISO 3586:1976, Glass plant, pipeline and fittings General rules for testing, handling and use. 2ISO 3587:1976, Glass plant, pipeline and fittings Pipeline and fittings of nominal bore 15 to 150 mm Compatibility and interchangeability. 3ISO 381
31、9:1985, Laboratory glassware Beakers. 4ISO 4704:1977, Glass plant, pipeline and fittings Glass plant components. 5ISO 4797:1981, Laboratory glassware Flasks with conical ground joints. 6ISO 4803:1978, Laboratory glassware Borosilicate glass tubing. 7ISO 7884-1:1987, Glass Viscosity and viscometric fixed points Part 1: Principles for determining viscosity and viscometric fixed points. -,-,- -,-,- ISO 3585:1998(E) ISO ICS 81.040.01 Descriptors: glass, borosilicate glass, specifications, materials specifications, physical properties, chemical properties. Price based on 4 pages -,-,-
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