DIN EN 14805-2008 Chemicals used for treatment of water intended for human consumption - Sodium chloride for on site electrochlorination using non-membrane technology English versi.pdf

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1、September 2008DEUTSCHE NORM English price group 15No part of this standard 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 71.100.80!$QtZ“14681

2、55www.din.deDDIN EN 14805Chemicals used for treatment of water intended for humanconsumption Sodium chloride for on site electrochlorination using non-membranetechnologyEnglish version of DIN EN 14805:2008-09Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natriumchlorid zur elektro

3、chemischen Erzeugung von Chlor vor Ort mittels membranloserVerfahrenEnglische Fassung DIN EN 14805:2008-09www.beuth.deDocument comprises 35 pagesDIN EN 14805:2008-09 2 National foreword This standard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The

4、 responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Technical Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard should note that national regulations exist in Germany dealing with the characteristics and tr

5、eatment of water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). The DIN Standards corresponding to the International Standards referred to in clause 2 and in the bibliography of the EN are as follows, whereby EN ISO Standards are only

6、listed below if these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung zur Novellierung der Trinkwasserverordnung (Ge

7、rman Regulation amending the German Drinking Water Regulation), as of 21 May 2001, BGBl. (German Federal Law Gazette) I (2001), No. 24, pp. 9599801)1)Recorded in the DITR database of DIN Software GmbH, obtainable from Beuth Verlag GmbH, 10772 Berlin, Germany. EUROPEAN STANDARDNORME EUROPENNEEUROPISC

8、HE NORMEN 14805June 2008ICS 71.100.80English VersionChemicals used for treatment of water intended for humanconsumption - Sodium chloride for on site electrochlorinationusing non-membrane technologyProduits chimiques utiliss pour le traitement de leaudestine la consommation humaine - Chlorure de sod

9、iumpour la gnration lectrochimique de chlore utilisant destechnologies non membranairesProdukte zur Aufbereitung von Wasser fr denmenschlichen Gebrauch - Natriumchlorid zurelektrochemischen Erzeugung von Chlor vor Ort mittelsmembranloser VerfahrenThis European Standard was approved by CEN on 29 May

10、2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained o

11、n application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Cen

12、tre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

13、 Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any mea

14、ns reservedworldwide for CEN national Members.Ref. No. EN 14805:2008: EEN 14805:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 3.1 Identification.5 3.2 Commercial forms .6 3.3 Physical properties6 3.4 Chemical properties 8 4 Purity criteria8 4.

15、1 General8 4.2 Composition of commercial product.9 4.3 Impurities and main by-products.9 4.4 Chemical parameters 9 5 Test methods10 5.1 Sampling.10 5.2 Analyses .10 6 Labelling - transportation - storage .14 6.1 Means of delivery.14 6.2 Risk and safety labelling in accordance with EU directives .15

16、6.3 Transportation regulations and labelling15 6.4 Marking .15 6.5 Storage15 Bibliography 33 DIN EN 14805:2008-09 Annex B (normative) Analytical methods .18 Annex A (informative) General information on sodium chloride for electrochlorination 16 EN 14805:2008 (E) 3 Foreword This document (EN 14805:20

17、08) 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 endorsement, at the latest by December 2008, and conflicting na

18、tional standards shall be withdrawn at the latest by December 2008. 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 identifying any or all such patent rights. According to the C

19、EN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

20、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 14805:2008-09 EN 14805:2008 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by t

21、he product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing n

22、ational regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European 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 European

23、 Standard is subject to regulation or control by National Authorities. DIN EN 14805:2008-09 EN 14805:2008 (E) 5 1 Scope This European Standard is applicable to sodium chloride intended for on site electrochlorination of water intended for human consumption using non-membrane technology. It describes

24、 the characteristics and specifies the requirements and the corresponding test methods for sodium chloride (see Annex B). It gives information on its use in water treatment. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated re

25、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 973:2002, Chemicals used for treatment of water intended for human consumption Sodium chloride for regeneration of ion exchangers EN ISO 3696, Water

26、for analytical laboratory use Specification and test methods (ISO 3696:1987) ISO 2479, Sodium chloride for industrial use Determination of matter insoluble in water or in acid and preparation of principal solutions for other determinations ISO 2480, Sodium chloride for industrial use Determination o

27、f sulphate content Barium sulphate gravimetric method ISO 2482, Sodium chloride for industrial use Determination of calcium and magnesium contents EDTA complexometric methods ISO 2483, Sodium chloride for industrial use Determination of the loss of mass at 110 degrees C ISO 3165, Sampling of chemica

28、l products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 6227, Chemical products for industrial use General method for determination of chloride ions Potentiometric method ISO 8213, Chemical products for industrial use Sampling technique

29、s Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Sodium chloride 3.1.2 Synonym or common name Salt 3.1.3 Relative molecular mass 58,45 DIN EN 14805:2008-09 EN 14805:2008 (E) 6 3.1.4 Empirical formula NaCl 3.1

30、.5 Chemical formula NaCl 3.1.6 CAS Registry Number1)7647-14-5 3.1.7 EINECS Reference2)231-598-3 3.2 Commercial forms The product is available as rock salt, sea salt or evaporated salt, and it is supplied as free-flowing crystals or their compacted forms. 3.3 Physical properties 3.3.1 Appearance The

31、product is white and crystalline. 3.3.2 Density The density of the solid crystal is 2,16 g/cm3 at 20 C. The bulk density depends on the particle size distribution. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial chemical Substances Reference. DIN EN 14805:

32、2008-09 EN 14805:2008 (E) 7 3.3.3 Solubility (in water) The solubility of the product depends on the temperature as given in Figure 1. Temperature NaCl solution C Mass fraction in % - 10 25,0 0 26,34 10 26,35 20 26,43 30 26,56 40 26,71 50 26,89 60 27,09 70 27,30 80 27,53 90 27,80 100 28,12 Key 1 tra

33、nsition point NaCl NaCl . 2H2O Figure 1 Solubility curve for sodium chloride in water 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)Not applicable. 3) 100 kPa = 1 bar DIN EN 14805:2008-09 EN 14805:2008 (E) 8 3.3.6 Melting point 802 C 3.3.7 Specific heat Approximately 850 J/(k

34、gK) at 25 C for the solid. 3.3.8 Viscosity (dynamic) The viscosity of the saturated solution at 20 C is approximately 1,9 mPas. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness The hardness of solid salt is given as 2 to 2,5 on the Mohs sca

35、le of hardness. 3.4 Chemical properties Sodium chloride is stable and non-volatile, and aqueous solutions have good electrical conductivity. Sodium chloride is decomposed by a number of acids. It reacts with sulfuric acid, phosphoric acid and strong oxidizing agents. The reactions are often complex

36、and require heat for completion. NOTE Under certain conditions a sodium chloride solution can cause corrosion of metallic surfaces. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium chloride for on site electrochlorination of water intended for

37、 human consumption using non-membrane technology. As the treatment chemical produced by this process is sodium hypochlorite, limits have been calculated from the requirements of EN 901 (sodium hypochlorite) for those impurities commonly present in the product and the chemical parameters. Considerati

38、on has also been given to the requirements of EN 973 (sodium chloride) for regeneration of ion exchangers. Depending on the raw material and the manufacturing process, other impurities may be present and, if so, this shall be notified to the user and, when necessary, to relevant authorities. NOTE 1

39、Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for the treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product and no

40、t stated in this product standard. NOTE 2 Using the sodium hypochlorite standard to define limits produces discrepancies with EN 973 regarding sodium chloride for the regeneration of ion exchange water softeners. This should not be taken to imply any real difference between the chemical purity betwe

41、en salt types meeting either specification. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of

42、 impurities, by-products or additives being present, this shall be notified to the user. DIN EN 14805:2008-09 EN 14805:2008 (E) 9 4.2 Composition of commercial product 4.2.1 Sodium chloride content The content of sodium chloride in the dry product shall not be less than: Type 1: mass fraction of 99,

43、9 % of dry sodium chloride, NaCl; Type 2: mass fraction of 98,5 % of dry sodium chloride, NaCl. 4.2.2 Anticaking agent Subject to any local legislation in member states, an anticaking agent, sodium or potassium hexacyanoferrate, is allowed up to a maximum level in the final product of 15 mg/kg, expr

44、essed as the anhydrous hexacyanoferrate ion Fe(CN6)-4; for the determination, see B.3 of EN 973:2002. If gaseous free chlorine is produced as a stage in the electrochlorination process, the level of hexacyanoferrate ion present should be less than 3 mg/kg. 4.3 Impurities and main by-products The pro

45、duct shall conform to the requirements specified in Table 1 and Table 2. Table 1 Impurities Impurity Limit in mass fraction in % of NaCI content Type 1 Type 2 Water-insoluble matter max. 0,05 0,35 Bromide max. 0,025 0,05 Table 2 Moisture content Impurity Limit in mass fraction in % of NaCI content D

46、ry salt Un-dried salt Moisture content Max. 0,1 5 4.4 Chemical parameters The product shall conform to the requirements specified in Table 3. DIN EN 14805:2008-09 EN 14805:2008 (E) 10 Table 3 Chemical parameters Parameter Limits in mg/kg of commercial product Type 1 Type 2 Arsenic (As) max. 0,3 1,5

47、Cadmium (Cd) max. 0,75 1,5 Chromium (Cr) max. 0,75 1,5 Mercury (Hg) max. 1,05 1,5 Nickel (Ni) max. 0,75 3 Lead (Pb) max. 3,5 4,5 Antimony (Sb) max. 6 7,5 Selenium (Se) max. 6 7,5 NOTE Other chemical parameters and indicator parameters are not relevant in sodium chloride, but there might be other par

48、ameter limits related to equipment performance, and some of these are listed in Annex A. 5 Test methods 5.1 Sampling A test sample of about 500 g shall be taken for analysis, ensuring that it is representative of the whole batch, and taking account of ISO 3165 and also ISO 6206. Prepare the laborato

49、ry sample(s) required in accordance with ISO 8213. 5.2 Analyses 5.2.1 Main product The mass fraction in % of sodium chloride (NaCI) shall be determined by calculation, on the basis of the results of the determinations of sulfate according to ISO 2480, halogens according to ISO 6227, calcium and magnesium according to ISO 2482 and loss of mass on drying according to ISO 2483. Convert sulfate to calcium sulfate and unused calcium to calcium chloride, unless sulfate in sample exceeds the amount necessary to combine wit