1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15795:2010Products used for treatmentof water intended for humanconsumption Naturalunexpanded aluminosilicatesBS EN 15795:2010 BRITISH STANDARDNational forewordThis British
2、 Standard is the UK implementation of EN 15795:2010.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not pu
3、rport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 61781 2ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority
4、of theStandards Policy and Strategy Committee on 31 October 2010.Amendments issued since publicationDate Text affectedBS EN 15795:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15795 September 2010 ICS 71.100.80 English Version Products used for treatment of water intended for human consum
5、ption - Natural unexpanded aluminosilicates Produits utiliss pour le traitement de leau destine la consommation humaine - Aluminosilicates naturels non expanss Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natrliche, nicht expandierte Aluminiumsilikate This European Standard wa
6、s approved by CEN on 7 August 2010. 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 nat
7、ional standards may be obtained on application to the CEN Management Centre 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
8、 notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
9、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All
10、 rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15795:2010: EBS EN 15795:2010EN 15795:2010 (E) 2 Contents Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms, definitions and symbols . 54 Description . 54.1 Identification .
11、 54.1.1 Chemical name . 54.1.2 Synonym and common names . 54.1.3 Chemical formula . 54.2 Commercial form . 55 Physical properties 55.1 Appearance 55.2 Particle size distribution . 65.3 Density 65.3.1 Bulk density loose . 65.3.2 Bulk density packed 66 Chemical properties 67 Test methods 77.1 Sampling
12、 . 77.2 Analysis 77.2.1 Particle size distribution . 77.2.2 Bulk density loose . 77.2.3 Bulk density packed 77.2.4 Acid-soluble material 78 Labelling, transportation and storage . 78.1 Means of delivery . 78.2 Risk and safety labelling according to the EU directives . 88.3 Transportation regulations
13、 and labelling 88.4 Marking . 88.5 Storage 8Annex A (informative) General information on natural unexpanded aluminosilicates 9A.1 Origin 9A.2 Typical properties 9A.3 Use 10A.4 Hydraulic characteristics 11A.5 Rules for safe handling and use 11A.6 Emergency procedures . 11Bibliography 12BS EN 15795:20
14、10EN 15795:2010 (E) 3 Foreword This document (EN 15795:2010) 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 text or by endors
15、ement, at the latest by March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. 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 for identifyin
16、g any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,
17、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15795:2010EN 15795:2010 (E) 4 Introduction In respect of potential adverse effects on the quali
18、ty of water intended for human consumption, caused by the product covered by this Standard: 1) this 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; 2) it should be noted that, while awaiting the adoption of ver
19、ifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with the 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 produ
20、ct covered by this European Standard is subject to regulation or control by National Authorities. BS EN 15795:2010EN 15795:2010 (E) 5 1 Scope This European Standard is applicable to natural unexpanded aluminosilicates used for treatment of water intended for human consumption. It describes the chara
21、cteristics of natural unexpanded aluminosilicates and specifies the requirements and the corresponding test methods for natural unexpanded aluminosilicates and gives information on their use in water treatment. 2 Normative references The following referenced documents are indispensable for the appli
22、cation 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 filteri
23、ng 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 purpose of this document, the terms, definitions and symbols given in EN 12901:1999 apply. 4 De
24、scription 4.1 Identification 4.1.1 Chemical name Aluminium silicate. 4.1.2 Synonym and common names Basalt, Volcanic sand, Phonolith. 4.1.3 Chemical formula AlxSiyOz. 4.2 Commercial form Natural unexpanded aluminosilicates according to this standard are available in different particle size ranges. 5
25、 Physical properties 5.1 Appearance The product is a hard, light grey to dark grey granular material. BS EN 15795:2010EN 15795:2010 (E) 6 The structure is crystalline with a rough surface. The particle shape is spherical or cubic depending mainly on the origin and manufacturing procedure (quarrying
26、or dredging, or crushing). The shape influences filtration performance, see A.4. The product shall be generally homogeneous and shall be visibly free from impurities and contamination. 5.2 Particle size distribution The particle size distribution shall be determined on samples taken at the point of
27、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) 1) effective size: (d10) with a permitted tolerance of 5 %; 2) uniformity coefficient: (U) shall be less t
28、han 1,5; 3) minimum size: (d1) with a permitted tolerance of 5 %; or: b) 1) by particle size range and by mass fraction of oversize and undersize particles according to application. 2) The maximum contents of oversize and undersize shall be a mass fraction of 5 % for application of the product as a
29、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 neces
30、sary for certain applications. 5.3 Density 5.3.1 Bulk density loose The bulk density loose shall be in the range of 1 250 kg/m3to 1 550 kg/m3. 5.3.2 Bulk density packed The bulk density packed shall be in the range of 1 400 kg/m3to 1 750 kg/m3. 6 Chemical properties This European Standard specifies
31、the minimum purity requirements for natural unexpanded aluminosilicates 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 may be present and, if
32、 so, this shall be notified to the user and when necessary to relevant authorities. NOTE 1 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 water quality,
33、 contents of other impurities and additives used in the products not stated in the product standard. BS EN 15795:2010EN 15795:2010 (E) 7 Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process an
34、d 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 composition of the commercial product shall conform to the requirements specified in Table 1. Table 1 Composition
35、of commercial product Parameter Limit in mass fraction % Acid-soluble material max. 10 NOTE 2 The exact composition does not influence filtration properties, but is given in A.2.1. NOTE 3 After filling, washing and commissioning of a filter system producing drinking water, natural unexpanded alumino
36、silicates should not increase the concentrations of chemical parameters (see 1). NOTE 4 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 Sam
37、pling 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 in accor
38、dance with EN 12902. 7.2.3 Bulk 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 Natu
39、ral unexpanded aluminosilicates shall be delivered in bags, semi-bulk containers or bulk. BS EN 15795:2010EN 15795:2010 (E) 8 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 c
40、leaned and prepared before use. 8.2 Risk and safety labelling according to the EU directives 1)Natural unexpanded aluminosilicates are not listed in the Reach regulation at the date of publication of this European Standard. NOTE The regulation 2 contains a list of substances classified by the EU. Su
41、bstances 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. 8.3 Transportation regulations and labelling Natural unexpanded aluminosilicates are not li
42、sted under a UN Number 2); they are not dangerous cargos. 8.4 Marking The marking shall include the following: “Natural unexpanded aluminosilicate“ or “Aluminium silicate”, trade name; net mass or net volume; name and address of supplier and/or manufacturer; the statement “This product conforms to E
43、N 15795“. 8.5 Storage Natural unexpanded aluminosilicates can be stored for an unlimited period of time. 1) See 2. 2) United Nations number. BS EN 15795:2010EN 15795:2010 (E) 9 Annex A (informative) General information on natural unexpanded aluminosilicates A.1 Origin A.1.1 Raw materials Natural ign
44、eous rock. A.1.2 Manufacturing process Natural, unexpanded aluminium silicates are produced by mining from natural deposits. They are crushed, cleaned, dried and sieved. A.2 Typical properties A.2.1 Chemical composition The composition depends on the origin. Typical values are given as an example in
45、 Table A.1. Mineralogical and petrological analyses give additional information. Table A.1 Chemical composition Parameter Typical values in mass fraction % SiO245 - 55 Al2O312 - 25 Fe2O3 (*)3 - 10 CaO 7 - 10 K2O 2 - 6 Na2O 3 - 7 * Total Fe(II) and Fe(III) oxides expressed as Fe2O3A.2.2 Mechanical st
46、rength The mechanical strength of natural unexpanded 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 determinati
47、on of abrasion do not lead to exact results regarding behaviour of filter media during operation. They can only be used for comparison of different filter media. BS EN 15795:2010EN 15795:2010 (E) 10 A.2.3 Examples of particle size distribution Examples of particle size distribution described by diff
48、erent particle size ranges and a permissible mass percentage of oversize and undersized product, are given in Table A.2. Table A.2 Examples of particle size range Permissible mass fraction % aParticle size range in mm Undersize Oversize 0,4 to 0,8 0,71 to 1,25 5 5 1,0 to 2,0 2,0 to 3,15 3,15 to 5,6
49、10 10 a The maximum permitted content of undersize and oversize is 5 % of the mass fraction for use of the product as a filtration layer in multi media filters, a mass fraction of 10 % for use in single media filters and a mass fraction of 15 % for application as a support layer. Other particle size ranges can be specified. A.2.4 Physical properties A.2.4.1 Absolute density The absolute density
