1、BRITISH STANDARD BS5895:1980 ISO4803:1978 Incorporating Amendment No.1 Specification for Borosilicate glass tubing for laboratory apparatus ISO title: Laboratory glassware-Borosilicate glass tubing UDC 542.231.7:666.112.7462BS5895:1980 This British Standard, having been prepared under the directiono
2、f the Laboratory Apparatus Standards Committee,was published underthe authority of the Executive Board and comesintoeffect on 31January1980 BSI09-1999 The following BSI references relate to the work on this standard: Committee reference LBC/25 Draft for comment 79/51250 DC ISBN 0 580 11181 4 Coopera
3、ting organizations The Laboratory Apparatus Standards Committee under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Agricultural Research Council Association for Science Education
4、 British Educational Equipment Association British Laboratory Ware Association* British Lampblown Scientific Glassware Manufacturers Association Ltd.* British Pharmacopoeia Commission Chemical Industries Association Chemical Society Chemical Society, Analytical Division* Department of Health and Soc
5、ial Security* Department of Industry (Laboratory of the Government Chemist)* Glass Manufacturers Federation* Institute of Petroleum Ministry of Defence Pharmaceutical Society of Great Britain Scientific Instrument Manufacturers Association Society of Chemical Industry Society of Glass Technology* St
6、andardization of Tar Products Tests Committee The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Institute of Medical Laboratory Sciences Amendments issued since
7、 publication Amd. No. Date of issue Comments 5693 September 1987 Indicated by a sideline in the marginBS5895:1980 BSI 09-1999 i Contents Page Cooperating organizations Inside frontcover National foreword ii 1 Scope and field of application 1 2 References 1 3 Designation 1 4 Material 1 5 Range of siz
8、es and tolerances 1 Table1External diameter and wall thickness 1 Table2Limits on bow 2 Publications referred to Inside back coverBS5895:1980 ii BSI 09-1999 National foreword This British Standard is identical with ISO 4803:1978 “Laboratory glassware-Borosilicate glass tubing” published by the Intern
9、ational Organization for Standardization (ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards
10、; attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Where the words “International Standard” appear, referring to this standard, they should be
11、 read as “British Standard”. There is no British Standard directly equivalent to ISO/R 719, but procedure A described in section 2 of BS3473:1962 “Methods for testing the chemical resistance of glass used in the preparation of laboratory glassware” is technically equivalent provided that the test is
12、 carried out at 98 0.5 C instead of100 1 C. Additional information. It should be noted that other borosilicate glasses having a thermal coefficient of expansion up to 4.0 10 6K 1are obtainable in the UK for particular purposes; these glasses are available in the same ranges of external diameters and
13、 wall thicknesses as those specified in Table 1. NOTETextual error. In Table 1 the entry for the light wall thickness for tubing of an external diameter of 7,0mm is given as “10 0,1”; the entry should read “1,0 0,1”. A British Standard does not purport to include all the necessary provisions of a co
14、ntract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-reference International Standard Corresponding British Standard ISO3585:1976 BS 2598 Glass plant, pipeline and fitting
15、s Part 1:1980 Properties of borosilicate glass3.3 Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will b
16、e indicated in the amendment table on the inside front cover.BS5895:1980 BSI 09-1999 1 1 Scope and field of application This International Standard specifies requirements for an internationally acceptable range of borosilicate glass tubing for laboratory apparatus. 2 References ISO/R 719, Determinat
17、ion of the hydrolytic resistance of glass grains at 98 C. ISO 3585, Glass plant, pipeline and fittings Properties of borosilicate glass 3.3. 3 Designation Tubing shall be designated by type of glass, external diameter, wall thickness and name of manufacturer. The three categories of wall thickness s
18、pecified shall be denoted as light, medium and heavy. 4 Material 4.1 General Tubing shall be made from borosilicate glass complying with the requirements of ISO 3585. It shall be as free as possible from striae and other defects that may interfere with vision or service, and shall be reasonably free
19、 from internal strain. 4.2 Hydrolytic resistance When the glass is tested in accordance with ISO/R719, the amount of alkali extracted from the glass shall not be greater than 314g of Na 2 O g 1 . 4.3 Thermal coefficient of expansion The glass shall have a thermal coefficient of expansion of (3,3 0,1
20、) 10 6K 1over a temperature range of 20 to 300 C. 5 Range of sizes and tolerances 5.1 Diameter and wall thickness Borosilicate glass tubing shall comply at all points with the dimensions and tolerances given in Table 1. 5.2 Length Tubing shall be supplied preferably in lengths of1,5m. 5.3 Straightne
21、ss All tubing shall be straight within the limits on bow given in Table 2. 5.4 Ovality At any cross-section of the tubing, the maximum and minimum external diameters shall not differ by more than 2 % of the nominal diameter. 5.5 Siding The difference between the minimum and maximum wall thicknesses
22、at any cross-section shall not exceed the following values: 5.6 Conicity The conicity of the tubing shall not exceed the tolerances on external diameter. Table 1 External diameter and wallthickness light wall tubing: 25 % of nominal wall thickness; medium and heavy wall tubing: 15 % of nominal wall
23、thickness. Dimensions in millimetres External diameter Light wall thickness Medium wall thickness Heavy wall thickness 4,0 0,4 5,0 0,4 0,8 0,1 0,8 0,1 6,0 0,4 7,0 0,4 8,0 0,4 9,0 0,4 10,0 0,4 11,0 0,4 12,0 0,4 13,0 0,4 14,0 0,4 1,0 0,1 10 0,1 1,0 0,1 1,0 0,1 1,0 0,1 1,0 0,1 1,0 0,1 1,0 0,1 1,0 0,1 1
24、,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 1,5 0,2 2,2 0,3 2,2 0,3 2,2 0,3 2,2 0,3 2,2 0,3 15,0 0,4 16,0 0,4 17,0 0,4 18,0 0,4 19,0 0,4 20,0 0,5 22,0 0,5 24,0 0,5 1,2 0,2 1,2 0,2 1,2 0,2 1,2 0,2 1,2 0,2 1,2 0,2 1,2 0,2 1,2 0,2 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0
25、,2 1,8 0,2 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 26,0 0,5 28,0 0,5 30,0 0,8 32,0 0,8 34,0 0,8 36,0 0,8 38,0 0,8 1,4 0,2 1,4 0,2 1,4 0,2 1,4 0,2 1,4 0,2 1,4 0,2 1,4 0,2 2,0 0,2 2,0 0,2 2,0 0,2 2,0 0,2 2,0 0,2 2,0 0,2 2,0 0,2 2,8 0,3 2,8 0,3 2,8 0,3 2,8 0,3 2,8 0,3 2,8 0,3 2,
26、8 0,3 40,0 1,0 42,0 1,0 44,0 1,0 46,0 1,0 48,0 1,0 1,6 0,2 1,6 0,2 1,6 0,2 1,6 0,2 1,6 0,2 2,3 0,3 2,3 0,3 2,3 0,3 2,3 0,3 2,3 0,3 3,2 0,4 3,2 0,4 3,2 0,4 3,2 0,4 3,2 0,4BS5895:1980 2 BSI 09-1999 Table 1 External diameter and wallthickness Table 2 Limits on bow Dimensions in millimetres External dia
27、meter Light wall thickness Medium wall thickness Heavy wall thickness 50,0 1,0 52,0 1,0 54,0 1,0 56,0 1,0 58,0 1,0 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0,2 1,8 0,2 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 3,5 0,4 3,5 0,4 3,5 0,4 3,5 0,4 3,5 0,4 60,0 1,5 65,0 1,5 70,0 1,5 75,0 1,5 2,2 0,3 2,2 0,3 2,2 0,3 2,2 0
28、,3 3,2 0,4 3,2 0,4 3,2 0,4 3,2 0,4 4,2 0,5 4,2 0,5 4,2 0,5 4,2 0,5 80,0 1,8 85,0 1,8 90,0 1,8 95,0 1,8 100,0 1,8 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 2,5 0,3 3,5 0,4 3,5 0,4 3,5 0,4 3,5 0,4 3,5 0,4 5,0 0,6 5,0 0,6 5,0 0,6 5,0 0,6 5,0 0,6 Values in millimetres External diameter Limits on bow at nominal le
29、ngth Upto 6 7to 10 Above 10 0,9 % 0,7% 0,5%BS5895:1980 BSI 09-1999 Publications referred to See national foreword.BS5895:1980 ISO4803:1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It prese
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