1、January 2013 Translation by DIN-Sprachendienst.English price group 10No 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).IC
2、S 71.100.80!$jO“1937144www.din.deDDIN EN 12912Products used for treatment of water intended for human consumption Barite;English version EN 12912:2012,English translation of DIN EN 12912:2013-01Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Baryt;Englische Fassung EN 12912:2012,En
3、glische bersetzung von DIN EN 12912:2013-01Produits utiliss pour le traitement de leau destine la consommation humaine Baryte;Version anglaise EN 12912:2012,Traduction anglaise de DIN EN 12912:2013-01SupersedesDIN EN 12912:2006-01www.beuth.deIn case of doubt, the German-language original shall be co
4、nsidered authoritative.Document comprises 17 pages 01.13 DIN EN 12912:2013-01 2 A comma is used as the decimal marker. National foreword This document (EN 12912:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved
5、 in its preparation was the Normenaus-schuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasser-aufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note that national regulations e
6、xist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV 2001) (German Drinking Water Ordinance). Since, as of the publication of this standard, barite is not mentioned in the list of substances for treatment and disinfection of water in accordance w
7、ith article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drink-ing water. The DIN Standards corresponding to the International Standards referred to in this document are as follows, whereby EN ISO Standards are only listed below if these have not been published as
8、DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 12912:2006-01 as follows: a) the reference to Directive 67/548/EEC relating to the classification, packing and labelling of dangerous substances has been replaced by the reference to Regu
9、lation EC No 1272/2008. Previous editions DIN EN 12912: 1999-11, 2006-01 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 200
10、1) (German Drinking Water Ordinance), as of 28 November 2011 (BGBI. I p. 2370), as amended by Article 2, Paragraph 19 of the Act of 22 December 2011 (BGBI. I p. 3044)*). *)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de).
11、 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12912 November 2012 ICS 71.100.80 Supersedes EN 12912:2005English Version Products used for treatment of water intended for human consumption - Barite Produits utiliss pour le traitement de leau destine la consommation humaine - Baryte Produkte z
12、ur Aufbereitung von Wasser fr den menschlichen Gebrauch - Baryt This European Standard was approved by CEN on 9 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard
13、 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 versions (English, French, German). A version in any o
14、ther 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, Belgium, Bulgaria, Croatia, Cyprus, Czech Republi
15、c, 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, Switzerland, Turkey and United Kingdom. EUROPEAN CO
16、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12912:2012: EEN 12912:2012 (E) 2 Co
17、ntents Page Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms, definitions and symbols . 54 Description . 55 Physical properties 66 Chemical properties 77 Test methods 78 Labelling, transportation and storage . 9Annex A (informative) General information on barite 11Bibliography 15DI
18、N EN 12912:2013-01 EN 12912:2012 (E) 3 Foreword This document (EN 12912:2012) 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
19、text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. 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 f
20、or identifying any or all such patent rights. This document supersedes EN 12912:2005. The significant technical difference between this edition and EN 12912:2005 is as follows: Updating of 8.2 in line with current legislation. According to the CEN/CENELEC Internal Regulations, the national standards
21、 organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxemb
22、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12912:2013-01 EN 12912:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by t
23、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
24、national 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 Europea
25、n Standard is subject to regulation or control by National Authorities. DIN EN 12912:2013-01 EN 12912:2012 (E) 5 1 Scope This European Standard is applicable to barite used for treatment of water intended for human consumption. It describes the characteristics of barite and specifies the requirement
26、s and the corresponding test methods for barite and gives information on its use in water treatment. 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 cite
27、d applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12901:1999, Products used for treatment of water intended for human consumption Inorganic supporting and filtering materials Definitions EN 12902, Products used for treatment of wa
28、ter intended for human consumption Inorganic supporting and filtering materials Methods of test EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) 3 Terms, definitions and symbols For the purposes of this document, the terms, definitions and symbols given in E
29、N 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical name Barium sulfate. 4.1.2 Synonym and common names Barite, baryte, heavy spar, tiff, cawk. 4.1.3 Chemical formula BaSO4. 4.1.4 CAS Registry number 1)13462-86-7. 1) Chemical Abstracts Service Registry Number. DIN EN 12912:2013-01 EN
30、 12912:2012 (E) 6 4.1.5 EINECS reference 2) 236-664-5. 4.2 Commercial form Barite according to this European Standard is available in different particle size ranges. 5 Physical properties 5.1 Appearance The product has various light shades, including white to yellow, with a vitreous lustre. The prod
31、uct has an angular shape and a crystalline structure. The product shall be generally homogeneous and shall be visibly free of extraneous matter. 5.2 Particle size distribution The particle size distribution shall be determined on samples taken at the point of manufacture using the method of test giv
32、en in EN 12902. NOTE 1 The particle size can decrease during transportation and handling. The particle size distribution shall be described by either: a) effective size: (d10) with a maximum deviation of 5%; uniformity coefficient: (U) which shall be less than 1,5; minimum size: (d1) with a maximum
33、deviation of 5%; or b) by particle size range and by mass fraction of oversize and undersize particles according to application. The maximum contents of oversize and undersize shall be a mass fraction of 5 % for application of the product as a filtration layer in multi media filters and a mass fract
34、ion of 10 % for use in single media filters. For use as a support layer, maximum mass fractions of oversize and undersize of 15 % are acceptable. See A.2.3 for examples of available particle sizes that are used. NOTE 2 Other values can be necessary for certain applications. 5.3 Density 5.3.1 Bulk de
35、nsity loose The bulk density loose shall be in the range of 2 200 kg/m3to 2 400 kg/m3. 2) European Inventory of Existing Commercial Chemical Substances. DIN EN 12912:2013-01 EN 12912:2012 (E) 7 5.3.2 Bulk density packed The bulk density packed shall be in the range of 2 500 kg/m3to 2 600 kg/m3. 6 Ch
36、emical properties This European Standard specifies the minimum purity requirements for barite used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities
37、may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw
38、 water quality, contents of other impurities and additives used in the products not stated in this product standard. 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
39、the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. The composition of the commercial product shall conform to the requirements specified in Table 1. Table 1 Composition of commercial produc
40、t Parameter Limit in mass fraction % Barium sulfate min 92 Acid-soluble material max 3 NOTE The contents of BaSO4and acid-soluble material do not influence filtration properties but give information about the source of barite After filling, washing and commissioning of a filter system producing drin
41、king water, barite should not increase the concentrations of chemical parameters (see 1). NOTE Water extractable substances, determined in accordance with the method for granular materials given in EN 12902, can be used to estimate the leaching of the chemicals specified in EN 12902. 7 Test methods
42、7.1 Sampling Prepare the laboratory sample(s) required by the relevant procedures described in EN 12902. 7.2 Analysis 7.2.1 Particle size distribution The particle size distribution shall be determined in accordance with EN 12902. 7.2.2 Bulk density loose The bulk density loose shall be determined i
43、n accordance with EN 12902. DIN EN 12912:2013-01 EN 12912:2012 (E) 8 7.2.3 Bulk density packed The bulk density packed shall be determined in accordance with EN 12902. 7.2.4 Main product - barium sulfate 7.2.4.1 Principle Melting of mineral with sodium carbonate followed by disintegration in water a
44、nd filtration to recover water insoluble carbonates. The solid is treated with hydrochloric acid solution and the acid insoluble fraction is filtered off. Barium sulfate is precipitated by addition of ammonium sulfate solution and gravimetrically determined. 7.2.4.2 Reagents All reagents shall be of
45、 recognised analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 7.2.4.2.1 Ammonium hydroxide solution, NH4OH = 0,9 g/ml. 7.2.4.2.2 Ammonium sulfate solution, (NH4)2SO4100 g/l solution. 7.2.4.2.3 Hydrochloric acid, HCl = 1,18 g/ml. 7.2.4.2.4 Sodium carbonate,
46、Na2CO3.7.2.4.2.5 Sodium carbonate solution, (Na2CO3) 30 g/l solution. 7.2.4.2.6 Methyl red, 0,5 g/l solution. 7.2.4.3 Apparatus Ordinary laboratory apparatus and glassware together with the following. 7.2.4.3.1 Platinum crucible. 7.2.4.3.2 Electric furnace, capable of being controlled at (850 25) C.
47、 7.2.4.3.3 Porcelain crucible. 7.2.4.3.4 Oven, capable of being controlled at (105 2) C. 7.2.4.4 Procedure Weigh in the platinum crucible (7.2.4.3.1), to the nearest 0,1 mg, about 0,5 g of barite previously finely powdered and dried at 105 C (m1). Add about 3 g of sodium carbonate (7.2.4.2.4), mix a
48、nd heat until the melt is clear. Cool and carefully disintegrate the solid with hot water. Filter and wash thoroughly the crucible and solid with hot sodium carbonate solution (7.2.4.2.5). Transfer the filter paper and the filtered solid to a 250 ml beaker and acidify with hydrochloric acid (7.2.4.2.3). Wash the crucible with few millilitres of hydrochloric acid and add the liquid to the solution. Boil the solution for 5 min and filter into a 600 ml beaker. Carefully
