SIST EN 12902:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Proizvodi, ki se uporabljajo za pripravo pitne vode – Anorganski nosilni in filtrski materiali - Metode preskušanjaProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Anorganische Filterhilfs- und Filtermaterialien - PrüfverfahrenProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Matériaux inorganiques de filtration et de support - Méthodes d'essaiProducts used for treatment of water intended for human consumption - Inorganic supporting and filtering materials - Methods of test71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12902:2004SIST EN 12902:2005en01-marec-2005SIST EN 12902:2005SLOVENSKI
STANDARDSIST EN 12902:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12902
November 2004 ICS 71.100.80 Supersedes EN 12902:1999 English version
Products used for treatment of water intended for human consumption - Inorganic supporting and filtering materials - Methods of test
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Matériaux inorganiques de filtration et de support - Méthodes d'essai Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Anorganische Filterhilfs- und Filtermaterialien - Prüfverfahren This European Standard was approved by CEN on 30 September 2004.
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 without any alteration. Up-to-date lists and bibliographical references concerning such national standards 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
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 STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1050 Brussels © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12902:2004: ESIST EN 12902:2005

Measurement of resistance to friability.33
The applicability of the methods is specified in the relevant product standard. 2 Normative references The following referenced documents are indispensable for the application of this document. 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 water intended for human consumption – Inorganic supporting and filtering materials – Definitions. EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987). ISO 562, Hard coal and coke – Determination of volatile matter. ISO 565, Test sieves – Metal wire cloth, perforated metal plate and electroformed sheet – Nominal sizes of openings. ISO 609, Solid mineral fuels – Determination of carbon and hydrogen – High temperature combustion method. ISO 2395, Test sieves and test sieving – Vocabulary. ISO 2591-1, Test sieving – Part 1: Methods using test sieves of woven wire cloth and perforated metal plate. ISO 3165, Sampling of chemical products for industrial use – Safety in sampling. ISO 6206, Chemical products for industrial use – Sampling – Vocabulary. ISO 8213, Chemical products for industrial use – Sampling techniques – Solid chemical products in the form of particles varying from powders to coarse lumps. ISO 9276-1, Representation of results of particle size analysis – Part 1: Graphical representation. ISO 13320-1, Particle size analysis – Laser diffraction methods – Part 1: General principles. 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 12901:1999 apply. 4 Sampling Observe the recommendations of ISO 3165 and see ISO 6206. Sample in accordance with ISO 8213 and obtain the laboratory sample from the bulk sample by using a divider. SIST EN 12902:2005

Alternative methods for particle size determination include:  water sieving for powders;  size measurement with magnification: microscopic counting;  particle fall in a fluid without acceleration: settling;  particle fall in a fluid with acceleration: cycloning;  electromagnetic wave diffraction: turbidity;  dielectric properties: Coulter counter. 5.1.2 Principle Measurement of particle size distribution by sieving for granular materials or laser diffraction for powders. 5.1.3 Particle size distribution for granular material The particle size distribution for granular material shall be determined in accordance with ISO 2591-1; see also ISO 2395 and ISO 565. 5.1.4 Particle size distribution for powders 5.1.4.1 General The laser diffraction method described applies to powders in suspension in a liquid or gaseous fluid as well as to aerosols or emulsions. Measurable particle sizes are between 0,5 µm and an upper limit linked to the optical configuration of the laser equipment used which can range up to 3 600 µm. The principle of the method and guidance on measurement are given in ISO 13320-1. 5.1.4.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. SIST EN 12902:2005

Key 1 funnel 7 pneumatic jack 2 test fluid 8 electric shut down 3 compressed air 9 thermometer 4 valve 10-13 electrodes 5 measurement chamber 14 drain valve 6 cylindrical cake carrier
Figure 1 – Example of permeameter SIST EN 12902:2005

Key A cylinder with internal diameter of (40 ± 5) mm and a height of (170 ± 20) mm B clamp C base D supporting plate E stainless steel screen with square mesh, opening (30 ± 10) µm Figure 2 – Example of filtering cell SIST EN 12902:2005

Key A cylinder with internal diameter of (40 ± 5) mm and a height of (170 ± 20) mm B clamp C base D supporting plate E stainless steel screen with square mesh, opening (30 ± 10) µm Figure 3 – Example of assembly of the filtering cell SIST EN 12902:2005

Desiccator 6.1.5 Preparation of the sample Dry a sufficient quantity of ISFM at 105 °C to constant mass in the oven (6.1.4.2). Return to ambient temperature in the desiccator (6.1.4.4). 6.1.6 Procedure Weigh to the nearest 0,1 g, approximately 50 g of the ISFM and transfer to a beaker (6.1.4.3). Note the mass m1. Cover the ISFM sample with hydrochloric acid (6.1.3.1). Leave in contact for 24 h at a temperature between 18 °C and 23 °C. Undertake five washings with water avoiding the loss of fines, and dry in the oven (6.1.4.2) at 105 °C to constant mass, then allow to cool in the desiccator. Weigh the ISFM, note the mass m2. 6.1.7 Expression of results The loss of mass to the acid (X1), expressed as mass fraction, is calculated from the following equation: 1001211×−=mmmX)( (7) where m1 is the mass of the sample of ISFM before the test, in grams; m2 is the mass of the sample of ISFM after the test, in grams. SIST EN 12902:2005

Ignite the crucible in the muffle furnace (6.2.3.2) at (650 ± 25) °C for 1 h. Place the crucible in the desiccator (6.2.3.4), cool to room temperature and weigh to the nearest 0,1 mg; note the mass m0. Into the ignited crucible, weigh, to the nearest 0,1 mg, sufficient dried sample so that the estimated amount of ash will be 0,1 g; note the mass m1. Place the crucible in the muffle furnace at (650 ± 25) °C and leave until constant mass is reached.
NOTE Ashing will normally require between 3 h and 16 h depending on type and particle size of the sample and can be considered to be complete when constant mass is attained. Place the crucible in the desiccator and allow to cool to room temperature. When cool, admit air slowly to avoid loss of ash from the crucible. Weigh to the nearest 0,1 mg; note the mass m2. 6.2.5 Expression of results The ash content (X2), expressed as mass fraction of dried material, is calculated from the following equation: 10001022×−−=)()(mmmmX (8) where: m0 is the mass of the empty crucible, in grams; m1 is the mass of the crucible plus dried sample, in grams; m2 is the mass of the crucible plus ashed sample, in grams. SIST EN 12902:2005

7,5 NOTE 2 The extraction of substances can vary with the composition of the water. The use of synthetic extraction water is intended to provide a reproducible method for evaluation of different materials but not to indicate exactly the effects that will occur in practice. 6.3.3 Apparatus Ordinary laboratory apparatus and glassware together with the following. 6.3.3.1 For testing granular materials: Glass column for leaching tests, at least 5 cm in diameter and at least 50 cm in length. 6.3.3.2 For testing powders: Sintered glass filter. 6.3.3.3 Oven capable of being controlled at (150 ± 5) °C. SIST EN 12902:2005
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