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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12671:2000 The Euro
2、pean Standard EN 12671:2000 has the status of a British Standard ICS 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chemicals used for treatment of water intended for human consumption Chlorine dioxide Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:38:59
3、GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 October 2000 BSI 10-2000 ISBN 0 580 36092 X BS EN 1
4、2671:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12671:2000. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has
5、 the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list
6、of organizations represented on this committee can be obtained on request to its secretary. The United Kingdom did not support this standard at the CEN Enquiry stage and voted against its acceptance at the Formal Vote stage. The principal UK objections were as follows. a) A standard on this subject
7、is unnecessary because there is no trade in chlorine dioxide: the chlorine dioxide used for water treatment is generated on site, from raw materials that are traded and are the subject of other European Standards. b) The standard does not contain any requirements for chlorine dioxide itself. c) Insu
8、fficent information is given on how to take a sample of chlorine dioxide. The only substantive part of the document is the method for determining chlorine dioxide and chlorite, which could be used to assess the performance of reactors generating chlorine dioxide. Additional information Article 8 of
9、the Council of the European Community Directive 80/778/EEC relating to the quality of water intended for human consumption requires Member States to ensure that substances used in the preparation of drinking water do not cause any contravention of the maximum admissible concentrations prescribed in
10、annex 1 to the Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Quality) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision for attaching conditions of use to chemicals and filter med
11、ia that are authorized for use in public water supplies. Details of conditions of use are contained in the Secretary of States List of Approved Products published by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London SW1E 6DE (www.dwi.detr.gov.uk/list/index/htm).
12、 Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electron
13、ic Catalogue. 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. Summary of pages This docum
14、ent comprises a front cover, an inside front cover, the EN title page, pages 2 to 22, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:38:59 GMT+00:00 2006
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