ISO 3585:1998 download

07-10-2021 comment

ISO 3585:1998 download.Borosilicate glass 3.3- Properties.
It is the purpose of ISO 3585 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 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 distinct 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 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 ISO 3585.
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 otherwise 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.
ISO 3585 speches the characteristIcs ol a type 01 glass desegnaled boroslhcate glass 3.T used foe the constructIon of lioratory glassware, glass plant, pipeline and fittrngs.
NOTE — A,weex A ts related btemational Standar.
2 NormatIve references
The folIowing standards contarn proveseons which, through re4erence In this text. constitule provisIons 01 ISO 3585. At the time of publication, the edItions Indicated were valid. All standards are seCt to revision, and parties to agreements based on ISO 3585 are encouraged to lrwestigate the poss*My 01 applying the most recent editions of the standards indicated below. Menters of IEC and ISO masnisen registers 01 currently valid International Standards.
ISO 695:1991, Glass — Resistance to attack by a boq aqueous solution of mixed alfcab — Method of lest and ciass,flcafton,
ISO 719:1985, Glass — hydrolytic resistance of glass grains at 98 C — Method of test and classification ISO 720:1985, Glass — Hydrolytic resistance oigilass grains at 121 C — Method of test and classificatIon.
ISO 1776:1985. Glass— Resistance Ic attack by hydroChA,,lc acid at 100 C— Flame evasion or flame atomic absorption spectrometric meThod.
ISO 7884-21987. Glass — Viscosily and enscometrtc fIxed poInts — Pwt 2: Determ.’nation of viscosily by rotation viscometers.
ISO 7884-3:1987. Glass — Vrscos#y and wscometric fixed points — Part 3: Dele,nirnation of inScosifr by fibre ehongaItovi WSCOn,eMr.
ISO 7884-4:1987. Glass — Viscosity and viscometi* fixed points — Part 4: Detemwnatlon of viscosity by beam
ISO 7884-8:1987. Glass —Viscosity and viscomelrrc fixed points — Pail 8: Determination of (ditatometric) transfom2attor, temperature.
ISO 7991:1987. Glass — Determination of 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 tree from larger InclisIons which can affect the mechanical Strength (le. refractory Induseons).
4 Chemical resistance
4.1 HydrolytIc resistance at 98 °C
Hydroy1)c resistance shall conlorm to grain class ISO 719-14081
For test method see ISO 719.
4.2 Hydrolytic resistance at 121 °C
Hydroy1ic resistance shall conlorm to rain class ISO 720-HGA 1.
For test method see ISO 720.
4.3 AcId resistance
Acid resistance shaH be equivalent to a mass of sodium oxide (Na20) 100 pg per 1 dm2 of glass wten the glass as a material is tested (including preliminary acid treatment).
For test method see ISO 1775.
4.4 ResIstance to attack by a boiling aqueous solution of mixed alkali
A$aIi resistance shall conlorm to class ISO 695-A2 or bettei
For test method see ISO 695.
5 Physical properties
NOTE — Prvpirly valueS wllhouf hfltoflg de1ebons (see 53, 5.4 and 51010 512) are gevan for guidance only. They do not specify borosilicate glass 3.3. Therefore, no lest method i stated
5.1 CoeffIcient of mean linear thermal expansion, a a(20 C;300 C)shof be equal to (3,3i0,1)x 10-5 K-t. For test method see ISO 7991 (reference me1hod)
5.5 Viscoslty/teniperature behaviour
The viscosity, i, and 1t5 relationship to temperature, T, is characterized by the foSowing (equdi1um) viscoslty/lemperalute ponls:
— 10 dPas at a temperature at T1 —(1 260 20) C; 1O a sal a temperature at T2 —(625 ± 10) C:
• 1013 dPas at a temperature 4 T3 (560 * 10) C.
Measuflng methods shall be as blows:
rotation viscometer, see ISO 7884-2:
libre elongation viscomefer, see ISO 7884-3:
beam bending viscometer. see ISO 7884-4.
NOTE — The measurement data of three eq.ala,tium viscoethes allow calculation of the vlscosdyltesnperalure r lationsl by the VFT equation [iee equation (2) of ISO 7884-1:1987) for interpolations. The temperature 1, 1 and 13 more or less correspond 10 the wodong point, softening p&nt and annealmg point respectively (see ISO 7884-I). although at least the latter Iwo do not cflaractanze well-defined equilibrium viscosities and do not l wito a liFT aurve.
5.6 Transformation temperature, t shall be equal 10525 15 C.
For test method see ISO 7884-8 (reference method).
5.7 Modulus of elasticity, F
1 shall be equal 1064 kN’rnm-2 (-64 x i0 MPal.
5.8 Poissons ratio, p p shall be equal to 0,20.
5.9 Ultimate tensile strength, Rm
Rm shall be equal 1035 N•mm-2 10 100 Nmm-2 (= 35 MPa to 100 MPa)
The wide range of ultimate tensle strength given indicates the wide scatter of test results obtainable With normal commercial glass to which this specification relates, when smooth, pressed, drawn or flre.polished test spectmens are used. Surface damage witI reduce the I allure stresses, The figures grven are not intended as a guide to design stresses.

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