1、September 2016 English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 71.100.80This standard has bee
2、n included in the body of DVGW Technical Rules.!%$r“2560179www.din.deDIN EN 12671Chemicals used for treatment of water intended for human consumption Chlorine dioxide generated in situ;English version EN 12671:2016,English translation of DIN EN 12671:2016-09Produkte zur Aufbereitung von Wasser fr de
3、n menschlichen Gebrauch Vor Ort erzeugtes Chlordioxid;Englische Fassung EN 12671:2016,Englische bersetzung von DIN EN 12671:2016-09Produits chimiques utiliss pour le traitement de leau destine la consommation humaine Dioxyde de chlore gnr in situ;Version anglaise EN 12671:2016,Traduction anglaise de
4、 DIN EN 12671:2016-09SupersedesDIN EN 12671:200904www.beuth.deDocument comprises 29 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN 12671:2016-09 2 A comma is used as the decimal marker. National foreword This docu
5、ment (EN 12671:2016) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Wasserwesen (DIN Standards Committee Water Practice), DIN-DVGW Joint Working Committee NA 119-07-13 AA
6、 Aufbereitungsstoffe und -anlagen. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV 2001) (G
7、erman Drinking Water Ordinance). When applying DIN EN 12761 in Germany, users of this standard should note the following: General For the application of chlorine dioxide in water treatment see DVGW W 224. Re A.2.4 Means of application When using injection pumps, the working solution is the stock sol
8、ution with a concentration of 2 g/l to 3 g/l. When using injectors, the injector water dilutes the stock solution, causing its concentration to be reduced from between 2 g/l and 3 g/l to at least between 0,2 g/l and 0,3 g/l. This does not result in instability, however, since the diluted solution is
9、 taken directly to the injection point with the injector water via short piping. See also DVGW W 624 for the installation and operation of chlorine dioxide feeders. The DIN Standard corresponding to the International Standard referred to in this document is as follows, whereby EN ISO Standards are o
10、nly listed below if these have not been published as DIN EN ISO Standards with the same number: ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 12671:2009-04 as follows: a) a NOTE stating that chlorine dioxide is to comply with the EU Biocides Regulation has been added; b) specifi
11、cations concerning hazard and safety related symbols have been brought in line with the Globally Harmonized System of Classification, Labelling and Packaging of Chemicals (GHS). Previous editions DIN EN 12671: 2000-11, 2009-04 DIN EN 12671:2016-09 3 National Annex NA (informative) Bibliography DIN I
12、SO 3696, Water for analytical laboratory use Specification and test methods DVGW W 224, Methods of drinking water desinfection using chlorine dioxide*)DVGW W 624, Dosing plants for disinfectants and oxidation agents Preparation and dosing plants for chlorine dioxide*)Verordnung ber die Qualitt von W
13、asser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (German Drinking Water Ordinance), as of 10 March 2016 (BGBI. I, p. 459)*) *)Published by: DVWG Deutscher Verein des Gas- und Wasserfaches e.V. (German Technical and Scientific Association for Gas and Water), obtainable from: Wi
14、rtschafts- und Verlagsgesellschaft Gas und Wasser mbH, Postfach 140151, 53056 Bonn. *)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de). DIN EN 12671:2016-09 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROP
15、ENNE EUROPISCHE NORM EN 12671 May 2016 ICS 71.100.80 Supersedes EN 12671:2009English Version Chemicals used for treatment of water intended for human consumption - Chlorine dioxide generated in situ Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Dioxyde de ch
16、lore gnr in situ Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Vor Ort erzeugtes Chlordioxid This European Standard was approved by CEN on 18 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
17、opean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versio
18、ns (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, B
19、elgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi
20、tzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN natio
21、nal Members. Ref. No. EN 12671:2016 EEN 12671:2016 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Description 6 3.1 Identification 6 3.1.1 Chemical name . 6 3.1.2 Synonym or common name . 6 3.1.3 Relative molecular mass . 6 3.1.4 Empirical formula . 6 3
22、.1.5 Chemical formula 6 3.1.6 CAS Registry Number 6 3.1.7 EINECS reference 6 3.2 Presentation form . 7 3.3 Physical properties . 7 3.3.1 Appearance 7 3.3.2 Density 7 3.3.3 Solubility in water . 7 3.3.4 Vapour pressure 7 3.3.5 Boiling point at 101,3 kPa . 8 3.3.6 Crystallization point . 8 3.3.7 Speci
23、fic heat 8 3.3.8 Viscosity (dynamic) 8 3.3.9 Critical temperature 8 3.3.10 Critical pressure 8 3.3.11 Physical hardness . 8 3.3.12 Dissolution heat . 8 3.4 Chemical properties . 8 4 Purity criteria . 9 4.1 General 9 4.2 Composition of in situ generated product 9 4.3 Impurities and main by-products .
24、 9 4.4 Chemical parameters . 9 5 Test methods . 10 5.1 Sampling 10 5.2 Determination of chlorine dioxide and chlorite concentrations 10 5.2.1 General . 10 5.2.2 Principle 10 5.2.3 Reagents 11 5.2.4 Apparatus 12 5.2.5 Procedure 12 5.2.6 Expression of results . 13 6 Labelling, distribution and storage
25、 . 13 6.1 Labelling according to the EU legislation . 13 DIN EN 12671:2016-09EN 12671:2016 (E) 3 6.2 Means of distribution 15 6.3 Storage, stability . 15 Annex A (informative) General information on chlorine dioxide 16 A.1 Origin 16 A.1.1 Raw materials 16 A.1.2 Manufacturing process . 16 A.2 Use 17
26、A.2.1 Function . 17 A.2.2 Form in which it is used 17 A.2.3 Treatment dose . 17 A.2.4 Means of application 17 A.2.5 Secondary effects 17 A.2.6 Removal of excess product 17 A.3 Spectrometric method for specific determination of CIO217 A.3.1 Principle . 17 A.3.2 Reagents . 18 A.3.3 Apparatus 18 A.3.4
27、Procedure 19 A.3.5 Precision 20 A.3.6 Specificity 20 A.4 Determination of chlorite and chlorate ions contents in aqueous chlorine dioxide as produced by the reactors . 20 A.4.1 General . 20 A.4.2 Sample collection and preparation 20 A.4.3 Principle . 20 A.4.4 Reagents . 20 A.4.5 Apparatus 21 A.4.6 P
28、rocedure 21 A.4.7 Expression of results . 22 A.4.8 Detection limit . 22 Annex B (normative) General rules relating to safety 23 B.1 Rules for safe handling and use . 23 B.2 Emergency procedures . 23 B.2.1 First aid 23 B.2.2 Spillage . 23 B.2.3 Fire . 23 Bibliography . 24 DIN EN 12671:2016-09EN 12671
29、:2016 (E) 4 European foreword This document (EN 12671:2016) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorse
30、ment, at the latest by November 2016, and conflicting national standards shall be withdrawn at the latest by November 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for ident
31、ifying any or all such patent rights. This document supersedes EN 12671:2009. Significant technical differences between this edition and EN 12671:2009 are as follows: a) deletion of reference to EU Directive 67/548/EEC of June 27, 1967 in order to take into account the latest Regulation in force (se
32、e 3); b) Subclause 6.2 updating of risk and safety labelling according to EU Regulation 3 and its latest Adaptations to Technical Progress). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standar
33、d: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain
34、, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12671:2016-09EN 12671:2016 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this document: 1) this document provides no information as to wh
35、ether the product may be used without restriction in any of the Member States of the EU or EFTA; 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE
36、1 Conformity with this standard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. NOTE 2 This product is a biocide and needs to com
37、ply with the relevant legislation in force. In the European Union, at the time of publication, this legislation is REGULATION (EU) No 528/2012 2). DIN EN 12671:2016-09EN 12671:2016 (E) 6 1 Scope This European Standard is applicable to chlorine dioxide generated on site for treatment of water intende
38、d for human consumption. It describes the characteristics for chlorine dioxide and specifies the composition and the corresponding test methods for chlorine dioxide. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use of chlorine dioxide
39、 generated on site (see Annex B). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
40、nced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary 3 Description
41、3.1 Identification 3.1.1 Chemical name Chlorine dioxide. 3.1.2 Synonym or common name None. 3.1.3 Relative molecular mass 67,46. 3.1.4 Empirical formula ClO2. 3.1.5 Chemical formula _O Cl O (resonance structure). 3.1.6 CAS Registry Number 1)10049-04-4. 3.1.7 EINECS reference 2)233-162-8. 1) Chemical
42、 Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. DIN EN 12671:2016-09EN 12671:2016 (E) 7 3.2 Presentation form For water treatment, chlorine dioxide is generated in situ as an aqueous solution on or near the site of use and transferred to the site
43、 of use. 3.3 Physical properties 3.3.1 Appearance The pure product is an orange gas or liquid, which forms a yellow solution in water. NOTE If the solution becomes red-brown, it is a sign of decomposition. 3.3.2 Density Gas: 3,09 g/l, (2,4 g/l relative, air = 1) at 273 K and 101,3 kPa 3). Liquid: 1,
44、64 g/ml at 20 C. 3.3.3 Solubility in water In Table 1 the solubility values (S) for chlorine dioxide are given in grams per cubic meter (g/m3) water at a pressure of 101,3 kPa for different temperatures: Table 1 Solubility values Temperature of water C S (323g/mHOg / m gas) 0 70 0,7 5 (60,3) 10 (53,
45、7) 15 45 20 (42,7) 25 (33) 30 (30,1) 35 26,5 0,8 NOTE 1 S is a ratio, not an absolute value of concentration. NOTE 2 The S values are directly measured values except those in brackets which are extrapolated data. 3.3.4 Vapour pressure The vapour pressure of pure chlorine dioxide as a function of tem
46、perature is given in Table 2. 3) 100 kPa = 1 bar. DIN EN 12671:2016-09EN 12671:2016 (E) 8 Table 2 Vapour pressure of pure chlorine dioxide Temperature C Vapour pressure kPa 0 82,3 5 90,4 10 98,8 11 100,5 20 116,5 (extrapolated) 25 125,8 (extrapolated) 30 135,3 (extrapolated) 35 145,1 (extrapolated)
47、40 155,0 (extrapolated) 3.3.5 Boiling point at 101,3 kPa 4)11 C (for pure chlorine dioxide). 3.3.6 Crystallization point - 59 C (for pure chlorine dioxide). 3.3.7 Specific heat The specific heat of solutions of chlorine dioxide is very similar to that of pure water. 3.3.8 Viscosity (dynamic) The dyn
48、amic viscosity of solutions of chlorine dioxide is very similar to that of pure water. 3.3.9 Critical temperature 153 C (for pure chlorine dioxide). 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.3.12 Dissolution heat The heat of the dissolution in water is 26,8
49、kJ/mol (exothermic). 3.4 Chemical properties Chlorine dioxide is a molecule containing an unpaired electron and has the characteristics of a “molecule-free-radical”. Relevant Redox potentials of chlorine dioxide and related molecules are (Eovalues at 25 C in volts): 4) 100 kPa = 1 bar. DIN EN 12671:2016-09EN 12671:2016 (E) 9 HCIO2+ 3H+ 4e- CI-+ 2H2O E0= 1,57 V CIO2(dissolved gas) + 1e- CIO2-E0= 1,15 V CIO3-+ 1e-+ 2H+ C
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