BS 5922-1980 Specification for glass condensers for laboratory use《实验室用玻璃冷凝器规范》.pdf

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1、BRITISH STANDARD BS5922:1980 ISO4799:1978 Specification for Glass condensers for laboratory use ISO title: Laboratory glassware Condensers UDC 542.231:542.482.8:666.172.7BS5922:1980 This British Standard, having been prepared under the directionof the Laboratory Apparatus Standards Committee,was pub

2、lished underthe authority of the Executive Board and comes intoeffect on 31 March1980 BSI09-1999 The following BSI references relate to the work on this standard: Committee reference LBC/25 Draft for comment73/50397 DC ISBN 0 580 11281 0 Cooperating organizations The Laboratory Apparatus Standards C

3、ommittee, 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 British Educational Equipment Association British Lab

4、oratory 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 Social Security* Department of Industry (Laboratory of the

5、 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* Standardization of Tar Products Tests Committee The organ

6、izations 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 publication Amd. No. Date of issue CommentsBS5922:1980

7、 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii 1 Scope and field of application 1 2 References 1 3 Definition 1 4 Classification and types 1 5 Material 1 6 Construction 1 7 Inscriptions 2 8 Design and dimensions 2 Publications referred to Inside back c

8、overBS5922:1980 ii BSI 09-1999 National foreword This British Standard is identical with ISO4799:1978 “Laboratory glassware Condensers” published by the International Organization for Standardization (ISO). It supersedes BS1848:1952 “Glass condensers” and BS3787:1964 “Glass condensers with standard

9、joints” both of which are now withdrawn. BS1848 was prepared as a British Standard for condensers without standard joints, and followed closely a selection made by the British Laboratory Ware Association of types that had been found to be satisfactory. BS3787 was prepared to provide for glass conden

10、sers in general use in laboratories, and reference was made to BS1848, although the range was smaller, because at that time there was insufficient demand for some of the condensers fitted with standard joints to justify inclusion in the British Standard. BS1848 and BS3787 both included requirements

11、for an air condenser, but these have been omitted from the present revision on the grounds that, consisting as it does of little more than a straight glass tube, the condenser is of such simple design that standardization in unnecessary. In this standard the requirements for the Liebig condenser hav

12、e been replaced by those for the West condenser, although the name “Liebig” is given as an alternative, because this general form of condenser is still known by the traditional name of “Liebig”. The classical Liebig condenser with the wide water jacket is now regarded as largely obsolete. The Davies

13、 (double surface) condenser has also been omitted. As in BS1848 and BS3787, the dimensions included in this British Standard are not mandatory and are recommended for the guidance of the manufacturer. Terminology and conventions. The text of the International Standard has been approved as suitable f

14、or publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used in8.3 as a decimal marker. In British Standards it is current practice to

15、 use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Related British Standards for ISO383 and ISO641 are BS572 (with Amendment PD4491) and BS2761 respectively. A British Sta

16、ndard does not purport to include all the necessary 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

17、, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5922:1980 BSI 09-1999 1 1 Scope and field

18、of application This International Standard specifies details for an internationally acceptable series of glass condensers suitable for general use in laboratories. 2 References ISO383, Laboratory glassware Interchangeable conical ground joints. ISO641, Laboratory glassware Interchangeable spherical

19、ground joints. 3 Definition For the purposes of this International Standard, the following definition applies: condenser a piece of laboratory apparatus designed for the exchange of heat between two fluids it is used for condensing vapours or for cooling or heating a liquid 4 Classification and type

20、s Five types of condenser, of three classes, according to design and the relative position of the cooling medium, are specified, with the nominal jacket lengths shown: water jacketed condensers: a) LiebigWest condenser (see8.1), 100160250400630 and1000mm; b) Allihn condenser (see8.2),160250400 and63

21、0mm; c) coiled distillate condenser (see8.3), 160250 400 and630mm; coolant-tube condensers: d) Graham condenser (see8.4),160250 and400mm; double-action condensers: e) jacketed coil condenser (see8.5), 160250 and400mm. 5 Material Condensers shall be constructed of clear glass of suitable chemical and

22、 thermal properties. Internal stress and visible defects in the glass shall be reduced to a level sufficient to minimize the possibility of fracture due to thermal or mechanical shock. 6 Construction 6.1 The extremities may be plain (see6.4) or fitted with conical or spherical interchangeable ground

23、 glass joints (see6.3). 6.2 Water connections, for example olives, should preferably face towards the same side of the condenser, except in the case of typee) condensers, where this configuration may cause an increased risk of fracture. 6.3 Ground glass joints 6.3.1 Conical ground glass joints shall

24、 comply with the requirements of ISO383, the sizes being chosen from the k6series. 6.3.2 Spherical ground glass joints shall comply with the requirements of ISO641. 6.4 The wide end of plain-end condensers shall be fire-polished, and the stem shall be either ground or fire-polished. 6.5 The drip tip

25、 at the lower end of the condenser shall be cut off at an angle of not less than30 to the plane of right angles to the longitudinal axis of the condenser.BS5922:1980 2 BSI 09-1999 7 Inscriptions The following inscriptions shall be permanently marked on all condensers: the nominal (jacket) length; th

26、e makers or vendors name or mark; the size of any ground joints. 8 Design and dimensions Typical condenser designs and essential dimensions are indicated in8.1 to8.5. 8.1 Liebig-West condenser Dimensions in millimetres l d 1 min. d 2min. 100 15 9 160 20 12 250 400 630 1000 24 16 NOTEIn the case of c

27、ondensers not provided with conical ground joints, the wide end and the stem shall have the following dimensions: wide end : length diameter 75 22 stem : length diameter 115 13BS5922:1980 BSI 09-1999 3 8.2 Allihn condenser Shapes of enlargement Dimensions in millimetres l 1 l 2 min. d 1 min. d 2 min

28、. 160 25 29 21 250 400 630 40 32 25 NOTEIn the case of condensers not provided with conical ground joints, the wide end and the stem shall have the following dimensions: wide end : length diameter 75 22 stem : length diameter 115 13BS5922:1980 4 BSI 09-1999 8.3 Coiled distillate condenser with socke

29、t only Dimensions in millimetres l 160 250 400 630 Minimum number of turns in coil 10 16 25 40 NOTEIf the condenser is provided with a cone, this shall be selected from the k6series of ISO383.BS5922:1980 BSI 09-1999 5 8.4 Graham condenser Dimensions in millimetres l 160 250 400 Minimum number of tur

30、ns in coil 10 16 25 For coil dimensions, see8.3.BS5922:1980 6 BSI 09-1999 8.5 Jacketed coil condenser with cone and socket Dimensions in millimetres l 160 250 400 Minimum number of turns in coil 8 14 23 For coil dimensions, see8.3.BS5922:1980 BSI 09-1999 Publications referred to See national forewor

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