08-30179078-DC.pdf
《08-30179078-DC.pdf》由会员分享,可在线阅读,更多相关《08-30179078-DC.pdf(12页珍藏版)》请在三一文库上搜索。
1、a Date: 29 August 2008 Origin: National Latest date for receipt of comments: 30 October 2008 Project no.: 2008/00782 Responsible committee: EH/2/1 Stationary source emission Interested committees: Title: BS 2742 Use of the Ringelmann and miniature smoke charts Supersession information: If this docum
2、ent is published as a standard, the UK implementation of it will supersede BS2742 : 1969 (R05) and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED O
3、R USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 October 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copy
4、ing is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organizat
5、ion by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on the committ
6、ees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/. Direct tel: 020 899
7、6 7106 Responsible Content Developer: Mr Stewart Wright (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30179078 DC Licensed CopyChinese University of Hong Kong, 21/10/2008 08:0
8、7, Uncontrolled Copy, (c) BSI b Introduction Your comments on this draft are invited and will assist in the preparation of the resulting British Standard. If no comments are received to the contrary, this draft may be implemented unchanged as a British Standard. Please note that this is a draft and
9、not a typeset document. Editorial comments are welcomed, but you are advised not to comment on detailed matters of typography and layout. Submission of comments The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committ
10、ee. This draft British Standard is available for review and comment online via the BSI British Standards Draft Review system at http:/. Registration is free and takes less than a minute. Once you have registered on the Draft Review system you will be able to review all current draft British Standard
11、s of national origin and submit comments on them. You will also be able to see comments made on current draft standards by other interested parties. When submitting comments on a draft you will be asked to provide both a comment (i.e. justification for change) and a proposed change. All comments wil
12、l be checked by a moderator before they are made public on the site. This is to ensure that improper language or marketing is not placed on the site the technical content of your comment will not be judged or modified; similarly, your grammar or spelling will not be corrected. A link to the BSI Brit
13、ish Standards Draft Review system, or to a specific draft hosted on the system, may be distributed to other interested parties so that they may register and submit comments. It is not necessary to purchase a copy of the draft in order to review or comment on it; however, additional copies of this dr
14、aft may be purchased from BSI, Tel: +44(0) 20 8996 9001 or email: . Drafts and standards are also available in PDF format for immediate download from the BSI Shop http:/ Licensed CopyChinese University of Hong Kong, 21/10/2008 08:07, Uncontrolled Copy, (c) BSI PRIVATE CIRCULATION BS 2742:2008 1 Draf
15、t BS 2742:2008 Use of the Ringelmann and miniature smoke charts Licensed CopyChinese University of Hong Kong, 21/10/2008 08:07, Uncontrolled Copy, (c) BSI PRIVATE CIRCULATION BS 2742:2008 2 Foreword Publishing information This British Standard is published by BSI and came into effect on XX Month 200
16、X. It was prepared by Technical Committee EH/2/1, Stationary source emission. A list of organizations represented on this committee can be obtained on request to its secretary. Supersession This British Standard supersedes BS 2742: 1969, which is withdrawn. Relationship with other publications This
17、British Standard is intended to be used with either of two charts: BS 2742C, Ringelmann chart or BS 2742M, Miniature smoke chart. Information about this document This is a full revision of the standard, and introduces the following principal changes: The 1972 Addendum has been removed: when it was d
18、eveloped, it was subject to uncertainty and in practice only should have only been applied to a limited number of coal burning chain grate stoker appliances (which are now rare). The relationship was not truly applicable to other firing methods or fuels as the particles emitted are of a different pa
19、rticle size distribution and reflectance. Added description of the manufacture/form of BS 2742C, Ringelmann chart and BS 2742M, Miniature smoke chart. This revision does not alter the technical requirements from those stated in the 1958 and 1969 editions. The values, however, are now expressed in me
20、tric terms. Presentational conventions The provisions in this standard are presented in roman (i.e. upright) type. Its recommendations are expressed in sentences in which the principal auxiliary verb is “should”. Commentary, explanation and general informative material is presented in smaller italic
21、 type, and does not constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal ob
22、ligations. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:07, Uncontrolled Copy, (c) BSI PRIVATE CIRCULATION BS 2742:2008 3 Contents Foreword 2 1 Introduction 4 2 Scope 4 3 Normative references 5 4 Use of the Ringelmann chart and miniature smoke chart 5 Annexes Annex A (informative) Cha
23、rt holders and use of the chart BS 2742C 7 Annex B (informative) Format of Ringelmann charts 10 List of figures Figure A.1 Suitable holder for BS 2742C Ringelmann chart 7 Figure A.2 Sketch showing method of use of British Standard Ringelmann chart 8 Figure A.3 Suitable holder for BS 2742M miniature
24、smoke chart 8 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:07, Uncontrolled Copy, (c) BSI PRIVATE CIRCULATION BS 2742:2008 4 1 Introduction The method of visual assessment of smoke emission by comparison of the darkness of the smoke with standard shades of grey on a chart placed in a
- 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:
- 08 30179078 DC
链接地址:https://www.31doc.com/p-3726937.html