1、BRITISH STANDARD BS 2069:1954 Specification for Gas sampling tubesBS2069:1954 This British Standard, having been approved by the Scientific Glassware and Related LaboratoryApparatus IndustryStandards Committee and endorsed by the Chairman ofthe Chemical Divisional Council, was published under theaut
2、hority of the General Council on 29April1954 BSI 10-1999 ISBN 0 580 35608 6 Co-operating organizations The Scientific Glassware and Related Laboratory Apparatus Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Go
3、vernment departments and scientific and industrial organizations: Admiralty* Air Ministry Association of British Chemical Manufacturers* Association of Scientific Workers Board of Trade British Association for the Advancement of Science* British Chemical Ware Manufacturers Association* British Labor
4、atory Ware Association* British Lampblown Scientific Glassware Manufacturers Association* British Pharmacopia Commission British Scientific Instrument Research Association Chemical Society Department of the Government Chemist* D.S.I.R. Chemical Research Laboratory Glass Manufacturers Federation* Ins
5、titute of Petroleum* Ministry of Education Ministry of Health* Ministry of Supply* National Physical Laboratory* Oil Companies Materials Committee Pharmaceutical Society of Great Britain Royal Institute of Chemistry* Science Masters Association Society for Analytical Chemistry* Society of Chemical I
6、ndustry Society of Glass Technology* Standardization of Tar Products Tests Committee* The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparati
7、on of this British Standard: Association of Hospital Management Committees Guild of Public Pharmacists High Commission of India Metropolitan Water Board University of London (Faculty of Science) Individual manufacturers Amendments issued since publication Amd. No. Date CommentsBS2069:1954 BSI 10-199
8、9 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Types and sizes 1 3 Material 1 4 Construction 1 5 Dimensions 1 6 Markings 2 Appendix Carrying cases 3 Figure 1 General design of gas sampling tubes 4 Figure 2 Diagram showing principal dimensions of casetocontain
9、tubesofnominal capacity100ml. 5 Figure 3 Diagram showing principal dimensions of casetocontaintubesofnominal capacity250ml. 6 Table 1 Mandatory requirements for gas sampling tubes 1 Table 2 Recommended dimensions for gas sampling tubes 1BS2069:1954 ii BSI 10-1999 Foreword This standard makes referen
10、ce to the following British Standard: BS1751, General purpose glass stopcocks. This British Standard has been prepared to cover the conventional types of gas sampling tube fitted with straight bore or double oblique bore stopcocks. The specification forms one of a series suggested by the British Lab
11、oratory Ware Association, and the working drawings first prepared by the B.L.W.A. in1948 have been taken into consideration when preparing the standard. The need for this standard arises principally from the fact that gas sampling tubes are commonly fitted in carrying cases, so that it is very conve
12、nient to the user to be able to obtain replacements from any source of supply to fit the original case. The dimensions affecting interchangeable fitting into a carrying case are the only mandatory ones in the specification because, so long as the stopcocks are ground to prevent leakage, the other fe
13、atures do not, in general, affect the performance or utility of a gas sampling tube. The nominal capacities of100 and250ml. have been selected as being the most popular in general use. The tubes are designed so that the100ml. tube will provide at least one100ml. or two50ml. samples and the250ml. tub
14、e twice as many. The Type1 tube is included in view of the wide demand for it for general work, but for accurate analysis the Type2 tube is usually preferred because it enables the connecting tube to be purged before transferring the sample. A British Standard does not purport to include all the nec
15、essary 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, an inside front cover, pagesi andii, pages1
16、 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.BS2069:1954 BSI 10-1999 1 1 Scope This British Standard specifies two types of gas sampli
17、ng tube, each in two sizes, suitable for general laboratory use, and allowing interchangeable fitting in carrying cases (seeAppendix). 2 Types and sizes Two types of gas sampling tube are specified: Type 1. With straight stopcocks, in nominal capacities of100 and250ml. Type 2. With double oblique bo
18、re stopcocks, in nominal capacities of100 and250ml. 3 Material The tubes shall be made of clear glass, reasonably free from visible defects, and shall be well annealed. 4 Construction The general design of the tubes shall be as illustrated inFigure 1. The construction shall be sufficiently robust to
19、 withstand the normal hazards of transporting from the sampling point to the laboratory. The tubes are designed to be used one way up. The connecting tube at the upper end shall be ground at right angles to the axis and lightly fire polished so as to give a butt connection to the gas analysis appara
20、tus. The connecting tube at the lower end shall be finished with a nipple as shown inFigure 1 for convenient connection to the displacement reservoir. 5 Dimensions The tubes shall conform to the mandatory dimensions given inTable 1, including the requirements of BS1751 1)appropriate to the stopcocks
21、 (and to the capillary tubes adjoining them). Table 2 lists, for the guidance of manufacturers, additional recommended dimensions for the tubes. These dimensions are not a mandatory part of the specification, but a tube which, on visual inspection, shows any gross departure from them shall be deemed
22、 not to comply with the specification. Table 1 Mandatory requirements for gas sampling tubes Table 2 Recommended dimensions for gas sampling tubes 1) BS1751, “General purpose glass stopcocks”. All linear dimensions are in millimetres Nominal capacity Type1 Type2 100ml. 250ml. 100ml. 250ml. Actual ca
23、pacity, minimum Length of bulb External diameter of bulb Distance between centres of stopcocks Overall length Stopcock designation according to BS1751 a 105ml. 155 5 36 2 220 5 290 5 GPC2 210ml. 205 5 44 2 270 5 340 5 GPC2 105ml. 155 5 36 2 220 5 290 5 DBC2 210ml. 205 5 44 2 270 5 340 5 DBC2 a BS175
24、1, “General purpose glass stopcocks”. All dimensions are in millimetres Nominal capacity Type1 Type2 100ml. 250ml. 100ml. 250ml. Wall thickness of bulb, minimum Distance from centre of stopcock to end of bulb Overall length of short arm of stopcock 1 35 1.5 35 1 35 30 1.5 35 30BS2069:1954 2 BSI 10-1
25、999 6 Markings Each tube shall have permanently and legibly marked on it: a) The nominal capacity, e.g.“100ml.” b) The makers or vendors name or mark. c) An area (about15mm. diameter) with a surface suitable for marking with pencil. d) The number of this British Standard, i.e.“BS2069”. 2) 2) The mar
26、k “BS2069” on the product is an indication by the manufacturer that it purports to comply with the requirements of this British Standard. The British Standards Institution is the owner of the registered certification mark shown below: which can be used by manufacturers only under licence from the BS
27、I. The presence of this mark in addition to the mark “BS2069” on a product is an assurance that the product does comply with the requirements of the standard. It indicates that the BSI has satisfied itself, by inspection and testing, that the system of production, supervision and control used by the
28、 manufacturer is such as to ensure compliance with all the requirements of the standard. Maintenance of this approved system is secured by periodical inspection and testing on behalf of the BSI. The mark must be accompanied by the name or registered trade mark or licence number of the licensed manuf
29、acturer. Further particulars of the terms of licence may be obtained from the Director, British Standards Institution,2 Park Street, London,W.1.BS2069:1954 BSI 10-1999 3 Appendix Carrying cases Although not a part of the specification for the tubes themselves,Figure 2 andFigure 3 are included for th
30、e convenience of manufacturers and users, showing suitable principal dimensions for carrying cases to contain tubes complying with this BritishStandard. BS2069:1954 4 BSI 10-1999 a. Type 1. With straight stopcock b. Type 2. With double oblique bore stopcock Figure 1 General design of gas sampling tu
31、besBS2069:1954 BSI 10-1999 5 All dimensions are in inches Figure 2 Diagram showing principal dimensions of case to contain tubes of nominal capacity100ml.BS2069:1954 6 BSI 10-1999 All dimensions are in inches Figure 3 Diagram showing principal dimensions of case to contain tubes of nominal capacity2
32、50ml.BS2069:1954 BSI 10-1999 British Standards The following are available on application: YEARBOOK Including subject index and numerical list of British Standards15s. SECTIONAL LISTS. Gratis Acoustics Aircraft materials and components Building materials and components Chemical engineering Chemicals
33、, fats, oils, scientific apparatus, etc. Cinematography and photography Coal, coke and colliery requisites Codes of Practice Consumer goods Documentation, including Universal Decimal Classification Drawing practice Electrical engineering Farming, dairying and allied interests Furniture, bedding and
34、furnishings Gas and solid fuel and refractories Glassware including scientific apparatus Hospital equipment Illumination and lighting fittings Industrial instruments, etc. Iron and steel Machine tools Mechanical engineering Nomenclature, symbols and abbreviations Non-ferrous metals Packaging and con
35、tainers Paints, varnishes, paint materials and colours for paints Personal safety equipment Petroleum industry Plastics Printing, paper and stationery Road engineering Rubber Shipbuilding Textiles and clothing WeldingBS2069:1954 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution
36、 BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make
37、 sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee respo
38、nsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, internatio
39、nal and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requested. I
40、nformation on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Cont
41、act the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:02089967002. F
42、ax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval sy
43、stem or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If
44、these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.
