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!$“1936196www.din.deDDIN EN 12910Products used for treatment of water intended for human consumption Garnet;English version EN 12910:2012,English translation of DIN EN 12910:2013-01Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Granatsand;Englische Fassung EN 12910:2012,
3、Englische bersetzung von DIN EN 12910:2013-01Produits utiliss pour le traitement de leau destine la consommation humaine Grenat;Version anglaise EN 12910:2012,Traduction anglaise de DIN EN 12910:2013-01SupersedesDIN EN 12910:2006-01www.beuth.deIn case of doubt, the German-language original shall be
4、considered authoritative.Document comprises 14 pages 12.12 DIN EN 12910:2013-01 2 A comma is used as the decimal marker. National foreword This document (EN 12910:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involv
5、ed 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
6、 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 12910:2006-01 as follows: a) the reference to Directive 67/548/EEC relating to the classification, packing
7、 and labelling of dangerous substances has been replaced by the reference to Regulation EC No 1272/2008. Previous editions DIN EN 12910: 1999-10, 2006-01 National Annex NA (informative) Bibliography Verordnung ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 200
8、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). E
9、UROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12910 November 2012 ICS 71.100.80 Supersedes EN 12910:2005English Version Products used for treatment of water intended for human consumption - Garnet Produits utiliss pour le traitement de leau destine la consommation humaine - Grenat Produkte zur
10、 Aufbereitung von Wasser fr den menschlichen Gebrauch - Granatsand 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 stand
11、ard 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 an
12、y 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, Belgium, Bulgaria, Croatia, Cyprus, Czech Repu
13、blic, 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
14、 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 worldwide for CEN national Members. Ref. No. EN 12910:2012: EEN 12910:2012 (E) 2
15、 Contents Page Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms, definitions and symbols . 54 Description . 55 Physical properties 56 Chemical properties 67 Specific properties. 78 Test methods 79 Labelling, transportation and storage . 7Annex A (informative) General information on
16、 garnet . 9Bibliography 12DIN EN 12910:2013-01 EN 12910:2012 (E) 3 Foreword This document (EN 12910:2012) 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
17、publication of an identical 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 sha
18、ll not be held responsible for identifying any or all such patent rights. This document supersedes EN 12910:2005. The significant technical difference between this edition and EN 12910:2005 is as follows: Updating 9.2 in line with current legislation. According to the CEN/CENELEC Internal Regulation
19、s, 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 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
20、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12910:2013-01 EN 12910:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for huma
21、n 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 or EFTA; b) it should be noted that, while awaiting the adoption of verifiable Euro
22、pean 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 the product in any of the Member States of the EU or EFTA. The use of the product
23、 covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 12910:2013-01 EN 12910:2012 (E) 5 1 Scope This European Standard is applicable to garnet used for treatment of water intended for human consumption. It describes the characteristics of garnet and s
24、pecifies the requirements and the corresponding test methods for garnet. It 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 reference
25、s, 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 water intended for human consumption Inorganic supporting and filtering materials Definitions EN 12902, Products
26、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, the terms, definitions and symbols given in EN 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical
27、 name(s) Almandite Fe3Al2(SiO4)3.Andradite Ca3Fe2(SiO4)3. NOTE Both forms can have other metals in partial substitution for the major constituents. 4.2 Commercial form Each of the two main types of garnet is available in different particle size grades. 5 Physical properties 5.1 Appearance The produc
28、t is a pink, red or brown to black coloured granular material. Cubic crystals; the particle shape can be angular to sub-angular to rounded depending on origin. The product shall be generally homogeneous and shall be visibly free of extraneous matter. DIN EN 12910:2013-01 EN 12910:2012 (E) 6 5.2 Part
29、icle 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 distribution shall be described by either: a)
30、 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 according to application. The maximum content
31、s 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 and undersize of 15 % are acceptable. Se
32、e 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 General The density of garnet varies with the mineralogical form. Garnet with absolute density lower than 3,8 g/cm3should not be used in multi media sand -
33、 garnet filters to prevent intermixing of media. 5.3.2 Bulk density loose Almandite: The bulk density loose shall be in the range of 2 150 kg/m3to 2 250 kg/m3. Andradite: The bulk density loose shall be in the range of 1 850 kg/m3to 2 000 kg/m3. 5.3.3 Bulk density packed Almandite: The bulk density
34、packed shall be in the range of 2 350 kg/m3to 2 400 kg/m3. Andradite: The bulk density packed shall be in the range of 1 950 kg/m3to 2 250 kg/m3. 6 Chemical properties This European Standard specifies the minimum purity requirements for garnet used for the treatment of water intended for human consu
35、mption. Limits are given for impurities commonly present 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. DIN EN 12910:2013-01 EN 12910:2012 (E) 7 Use
36、rs 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 water quality, contents of other impurities and additives used in the products not stated in this product st
37、andard. 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 impurities, by-products or additive
38、s being present, this shall be notified to the user. The chemical composition varies with the mineralogical form. Typical data are given in Table A.1. NOTE 1 Because of the nature of the occurrence and production of garnet, a small proportion of other minerals, in particular silica sand and ilmenite
39、, can be present in the commercial product. After filling, washing and commissioning of a filter system producing drinking water, garnet should not increase the concentrations of chemical parameters (see 1). NOTE 2 Water extractable substances, determined in accordance with the method for granular m
40、aterials given in EN 12902, can be used to estimate the leaching of the chemicals specified in EN 12902. 7 Specific properties Garnet is a non-reactive high density filtration and support medium. It is used specifically because of its high density. 8 Test methods 8.1 Sampling Prepare the laboratory
41、sample(s) required by the relevant procedures described in EN 12902. 8.2 Analysis 8.2.1 Particle size distribution The particle size distribution shall be determined in accordance with EN 12902. 8.2.2 Bulk density loose The bulk density loose shall be determined in accordance with EN 12902. 8.2.3 Bu
42、lk density packed The bulk density packed shall be determined in accordance with EN 12902. 9 Labelling, transportation and storage 9.1 Means of delivery Garnet shall be delivered in bags, semi-bulk containers, or bulk. In order that the purity of the product is not affected, the means of delivery sh
43、all not have been used previously for any different product or it shall have been specially cleaned and prepared before use. DIN EN 12910:2013-01 EN 12910:2012 (E) 8 9.2 Labelling in accordance with the EU legislation 1)Garnet is not listed within Annex VI of Regulation (EC) No 1272/2008 at the date
44、 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 classified by the EU. Substances not listed in this regulation should be classified on the basis of their intrinsic p
45、roperties according to the criteria in the regulation by the person responsible for the marketing of the substance. NOTE Additional national regulations may apply to the labelling of this product. 9.3 Transportation regulations and labelling Garnet is not classified as dangerous product for road, ra
46、il, sea and air transportation. Garnet is not listed under a UN Number 2). 9.4 Marking The marking shall include the following: name “Garnet“, trade name and grade; net mass; name and the address of supplier and/or manufacturer; statement “This product conforms to EN 12910“. 9.5 Storage (long term s
47、tability) Garnet can be stored for an unlimited period of time. 1) See 2. 2) United Nations Number. DIN EN 12910:2013-01 EN 12910:2012 (E) 9 Annex A (informative) General information on garnet A.1 Origin A.1.1 Raw material Garnet exists in nature in six main varieties of which only two forms are gen
48、erally used as filtration and supporting materials: almandite garnet and andradite garnet. Both these varieties occur as massive rock deposits and also as alluvial sands in both geological and modern beach deposits. Garnet rarely occurs as a single pure variety: the different forms often grade into each other with some replacement of the main metallic elements by minor ones. For this reason, the analyses of the same type of garnet from different deposits will vary.
