BS-4559-6-1981 ISO-6147-1979.pdf
《BS-4559-6-1981 ISO-6147-1979.pdf》由会员分享,可在线阅读,更多相关《BS-4559-6-1981 ISO-6147-1979.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 4559-6: 1981 ISO 6147:1979 Methods for Preparation of calibration gas mixtures Part 6: Saturation method ISO title: Gas analysis Preparation of calibration gas mixtures Saturation method UDC 543.27:54 13 185:53.089.62 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:17:4
2、5 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4559-6:1981 This British Standard, having been prepared under the direction of the Environment and Pollution Standards Committee, was published under the authority of the Executive Board and comes into effect on 31 March 1981 BSI 08-1999 First publishe
3、d as BS 4559 March 1970 First part revision as Part 6 March 1981 The following BSI references relate to the work on this standard: Committee reference EPC/46 Draft for comment 77/55179 DC ISBN 0 580 11852 5 Cooperating organizations The Environment and Pollution Standards Committee, under whose dire
4、ction this British Standard was prepared, consists of representatives from the following: Association of County Councils British Gas Corporation* British Industrial Measuring and Control Apparatus Manufacturers Association* British Railways Board British Steel Industry Chemical Industries Associatio
5、n Chemical Society Committee for Environmental Conservation Confederation of British Industry Consumer Standards Advisory Committee of BSI Council of Engineering Institutions Department of Energy (Energy Technology) Department of Industry (Warren Spring Laboratory)* Department of the Environment (Wa
6、ter Engineering Division including Water Data Unit) Electricity Supply Industry in England and Wales* Engineering Equipment Users Association Greater London Council Health and Safety Executive Institute of Petroleum* Medical Research Council Ministry of Agriculture, Fisheries and Food National Coal
7、Board* National Consumers Council National Water Council Scottish Office Society of Chemical Industry* Trades Union Congress The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation o
8、f this British Standard: Cement Makers Federation Department of Energy (Gas Standards) Department of Industry Institution of Gas Engineers Scientific Instrument Manufacturers Association Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No.Date of issueComme
9、nts Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4559-6:1981 BSI 08-1999i Contents Page Cooperating organizationsInside front cover National forewordii 1Scope and field of application1 2Principle1 3Practical example1 4Calculation of th
10、e error2 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4559-6:1981 ii BSI 08-1999 National foreword BS 4559 was first published in 1970 under the title “Methods for the preparation of gaseous mixtures”. The present revision is being iss
11、ued in Parts to incorporate methods prepared by subcommittee 1, Preparation and definition of gas mixtures for calibration, of Technical Committee 158, Gas analysis, of the International Organization for Standardization (ISO), and to provide for revision where necessary of the methods included in th
12、e 1970 edition. This Part of this British Standard, which has been prepared under the direction of the Environment and Pollution Standards Committee, is identical with ISO 6147:1979 “Gas analysis Preparation of calibration gas mixtures Saturation method”. A saturation method is described briefly in
13、4.3.2 of BS 4559:1970 and is superseded by this Part in greater detail. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those use
14、d in British Standards; attention is especially drawn to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard,
15、they should be read as “British Standard”. A British Standard 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
16、. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2 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. Lice
17、nsed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4559-6:1981 BSI 08-19991 1 Scope and field of application This International Standard describes the principles of a saturation method for the continuous preparation of calibration gas mixtures,
18、one of the components of which is readily condensable. An accuracy of 3 % relative value may be obtained on the concentration, expressed as a pressure ratio1). Readily condensable gases often exhibit very marked sorption phenomena; it is, therefore, difficult to prepare mixtures comprising such gase
19、s by static methods. Moreover, the use of high pressures precludes the achievement of concentrations close to the saturation limit during the use of the mixture at atmospheric pressure. In these cases, recourse should be made to the method described in this International Standard. 2 Principle The va
20、pour pressure of a pure gas in equilibrium with its condensed phase depends only on the temperature. If the temperature and the total pressure of the gas mixture are known, its concentration may be deduced therefrom. In practice, when a make-up gas is brought into contact with the condensed phase of
21、 a component at a given temperature, saturation is attained only very slowly. To accelerate this process, the make-up gas is bubbled through the condensed phase at a temperature T1 and the resulting mixture is cooled to temperature T2 in a condenser. To be certain of obtaining saturation, the temper
22、ature difference T1 T2 should be sufficiently large. The cooling system shall ensure the steady removal of heat (any on/off control system shall be rejected since it introduces temperature gradients). The coefficient of exchange between the condenser and the gases must be large: a good means for obt
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS-4559-6-1981 ISO-6147-1979 BS 4559 1981 ISO 6147 1979
链接地址:https://www.31doc.com/p-3773449.html