EN 12910:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Proizvodi, ki se uporabljajo za pripravo pitne vode – GranatProdukte zur Aufbereitung von Wasser für den menschilchen Gebrauch - GranatsandProduits utilisés pour le traitement de l'eau destinée a la consommation humaine - GrenatProducts used for treatment of water intended for human consumption - Garnet71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12910:2005SIST EN 12910:2006en01-marec-2006SIST EN 12910:2006SLOVENSKI
STANDARDSIST EN 12910:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12910October 2005ICS 71.100.80Supersedes EN 12910:1999
English VersionProducts used for treatment of water intended for humanconsumption - GarnetProduits utilisés pour le traitement de l'eau destinée à laconsommation humaine - GrenatProdukte zur Aufbereitung von Wasser für denmenschilchen Gebrauch - GranatsandThis European Standard was approved by CEN on 4 August 2005.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 on application to the Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12910:2005: ESIST EN 12910:2006

General information on garnet.9 Bibliography.13 SIST EN 12910:2006

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 product 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. SIST EN 12910:2006

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 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 General The density of garnet varies with the mineralogical form. NOTE Garnet with absolute density lower than 3,8 g/cm3 should not be used in multi media sand - 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/m3 to 2 250 kg/m3. Andradite: The bulk density loose shall be in the range of 1 850 kg/m3 to 2 000 kg/m3. 5.3.3 Bulk density pac
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