1、January 2013 Translation by DIN-Sprachendienst.English price group 9No 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
2、 71.100.80!$gT“1936849www.din.deDDIN EN 12905Products used for treatment of water intended for human consumption Expanded aluminosilicate;English version EN 12905:2012,English translation of DIN EN 12905:2013-01Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Expandierte Aluminiumsi
3、likate;Englische Fassung EN 12905:2012,Englische bersetzung von DIN EN 12905:2013-01Produits utiliss pour le traitement de leau destine la consommation humaine Aluminosilicate expans;Version anglaise EN 12905:2012,Traduction anglaise de DIN EN 12905:2013-01SupersedesDIN EN 12905:2006-01www.beuth.deI
4、n case of doubt, the German-language original shall be considered authoritative.Document comprises 14 pages 12.12 DIN EN 12905:2013-01 2 A comma is used as the decimal marker. National foreword This document (EN 12905:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretar
5、iat: AFNOR, France). The responsible German body involved 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 Euro
6、pean Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). Amendments This standard differs from DIN EN 12905:2006-01 as follows: a) the reference to Direc
7、tive 67/548/EEC relating to the classification, packing and labelling of dangerous substances has been replaced by the reference to Regulation EC No 1272/2008. Previous editions DIN EN 12905: 1999-10, 2006-01 National Annex NA (informative) Bibliography Verordnung ber die Qualitt von Wasser fr den m
8、enschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (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)Registered in the DITR database of DIN Software GmbH, obtainable from: Beuth Ve
9、rlag GmbH, 10772 Berlin. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12905 October 2012 ICS 71.100.80 Supersedes EN 12905:2005English Version Products used for treatment of water intended for human consumption - Expanded aluminosilicate Produits utiliss pour le traitement de leau destine la
10、 consommation humaine - Aluminosilicate expans Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Expandierte Aluminiumsilikate 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 t
11、he conditions for giving this European 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 Standar
12、d exists in three official versions (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 nation
13、al standards bodies of 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, Slova
14、kia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE 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 wo
15、rldwide for CEN national Members. Ref. No. EN 12905:2012: EEN 12905:2012 (E) 2 Contents Page Foreword . 3Introduction 41 Scope 52 Normative references 53 Terms, definitions and symbols 54 Description . 55 Physical properties . 56 Chemical properties 67 Test methods . 78 Labelling, transportation and
16、 storage . 7Annex A (informative) General information on expanded aluminosilicate 9Bibliography . 12 DIN EN 12905:2013-01 EN 12905:2012 (E) 3 Foreword This document (EN 12905:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This Eur
17、opean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elemen
18、ts 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. This document supersedes EN 12905:2005. The significant technical difference between this edition and EN 12905:2005 is as follows: Updating of 8.2
19、in line with current legislation. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav
20、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 the United Kingdom. DIN EN 12905:2013-01 EN 12905:2012 (E) 4 Introduction
21、 In respect of potential adverse effects on the quality of water intended for human consumption caused by the 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 o
22、r EFTA; b) 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 Conformity with this European Standard does not confer or imply acceptance or approval of
23、 the product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 12905:2013-01 EN 12905:2012 (E) 5 1 Scope This European Standard is applicable to expanded aluminosilicate used for
24、 treatment of water intended for human consumption. It describes the characteristics of and specifies the requirements and the corresponding test methods for expanded aluminosilicate. It gives information on its use in water treatment. 2 Normative references The following documents, in whole or in p
25、art, 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 referenced document (including any amendments) applies. EN 12901:1999, Products used for treatment of wa
26、ter intended for human consumption Inorganic supporting and filtering materials Definitions EN 12902, Products used for treatment of water intended for human consumption Inorganic supporting and filtering materials Methods of test 3 Terms, definitions and symbols For the purposes of this document, t
27、he terms, definitions and symbols given in EN 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical name Aluminosilicate (AlxSiyOz). 4.1.2 Synonym or common names Expanded clay, expanded slate. 4.2 Commercial forms Expanded aluminosilicate according to this European Standard is available
28、 in different particle size ranges. 5 Physical properties 5.1 Appearance Grey-brown to red-brown coloured granular material. Spherical or angular shape, crystalline structure, smooth or rough texture. The product shall be generally homogeneous and shall be visibly free of extraneous matter. DIN EN 1
29、2905:2013-01 EN 12905:2012 (E) 6 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 given in EN 12902. NOTE 1 The particle size can decrease during transportation and handling. The particle size dist
30、ribution 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 deviation of 5 %. or b) by particle size range and by mass fraction of oversize and undersize particles accordi
31、ng 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 fraction of 10 % for use in single media filters. For use as a support layer, maximum mass fractions of oversize an
32、d 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 density loose The bulk density loose shall be in the range of 300 kg/m3to 900 kg/m3. 5.3.2 Bulk density packed T
33、he bulk density packed shall be in the range of 320 kg/m3to 950 kg/m3. 6 Chemical properties This European Standard specifies the minimum purity requirements for expanded aluminosilicate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present
34、in the product. 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. Users of this product should check the national regulations in order to clarify whether it is of appr
35、opriate purity for treatment of water intended for human consumption, taking into account raw water quality, contents of other impurities and additives used in the products not stated in the product standard. Limits have been given for impurities and chemical parameters where these are likely to be
36、present in significant quantities from the current production process and raw materials. If 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 content of acid-soluble material shall be
37、less than a mass fraction of 7 %. NOTE 1 The exact composition does not influence filtration properties and is given in A.2.1. DIN EN 12905:2013-01 EN 12905:2012 (E) 7 After filling, washing and commissioning of a filter system producing drinking water, expanded aluminosilicates should not increase
38、the concentrations of chemical parameters (see 1). NOTE 2 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 7.1 Sampling Prepare the laboratory s
39、ample(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 in accordance with EN 12902. 7.2.3 Bul
40、k density packed The bulk density packed shall be determined in accordance with EN 12902. 7.2.4 Acid-soluble material The content of acid-soluble material shall be determined in accordance with EN 12902. 8 Labelling, transportation and storage 8.1 Means of delivery Expanded aluminosilicates shall be
41、 delivered in bags, semi-bulk containers, or bulk. In order that the purity of the product is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 8.2 Labelling in accordance with the EU leg
42、islation 1)Expanded aluminosilicates are not listed within Annex VI of Regulation (EC) No 1272/2008 at the date of publication of this European Standard. The legislation 2, and its amendments for the purposes of its adaptation to technical and scientific progress contains a list of substances classi
43、fied by the EU. Substances not listed in this regulation should be classified on the basis of their intrinsic properties according to the criteria in the regulation by the person responsible for the marketing of the substance. 1) See 2. DIN EN 12905:2013-01 EN 12905:2012 (E) 8 8.3 Transportation reg
44、ulations and labelling Expanded aluminosilicates are not dangerous goods. 8.4 Marking The marking shall include the following: name “expanded clay”, “expanded slate“ or “expanded aluminosilicate”, trade name and particle size range; net mass or volume; name and the address of supplier and/or manufac
45、turer; statement “this product conforms to EN 12905“. 8.5 Storage (long term chemical stability) Expanded aluminosilicates can be stored for an unlimited period of time. DIN EN 12905:2013-01 EN 12905:2012 (E) 9 Annex A (informative) General information on expanded aluminosilicate A.1 Origin A.1.1 Ra
46、w material Clay and slate. A.1.2 Manufacturing process Clay and slate are produced by quarrying. The material is then thermally treated in a special oven, and finally crushed and sieved. A.2 Typical properties A.2.1 Chemical composition The composition depends on the origin of the raw materials. Exa
47、mples are given in Table A.1. Table A.1 Chemical composition Parameter Mass fraction in % SiO2range 55 to 75 Al2O3range 10 to 25 Fe2O3range 2 to 15 CaO range 2 to 10K2O max 10 Na2O max 10 Mineralogical and petrological analyses give additional information. A.2.2 Mechanical strength The mechanical st
48、rength of aluminosilicates is high. Abrasion products consist of dust and small particles of material. They are formed during transportation, filling, and washing. Abrasion products are not completely removed by washing. The existing methods for determination of abrasion do not lead to exact results regarding behaviour of filter media during operation. They can be used only for comparison of different filter media. DIN EN 12905:2013-01 EN 12905:2012 (E) 10 A.2.3 Examp
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