SIST EN 12518:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Visoko kalcijevo apnoProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - WeißkalkProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - ChauxChemicals used for treatment of water intended for human consumption - High-calcium lime71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12518:2008SIST EN 12518:2008en,fr,de01-marec-2008SIST EN 12518:2008SLOVENSKI
STANDARDSIST EN 12518:20011DGRPHãþD



SIST EN 12518:2008



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12518January 2008ICS 71.100.80Supersedes EN 12518:2000
English VersionChemicals used for treatment of water intended for humanconsumption - High-calcium limeProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - ChauxProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - WeißkalkThis European Standard was approved by CEN on 30 November 2007.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 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, 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© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12518:2008: ESIST EN 12518:2008



EN 12518:2008 (E) 2 Contents Foreword.3 1 Scope.5 2 Normative references.5 3 Description.5 4 Purity criteria.8 5 Test methods.10 6 Labelling - Transportation - Storage.10 Annex A (informative)
General information on high-calcium lime.13 Annex B (normative)
General rules relating to safety.15 Bibliography.16
SIST EN 12518:2008



EN 12518:2008 (E) 3 Foreword This document (EN 12518:2008) 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 endorsement, at the latest by July 2008, and conflicting national standards shall be withdrawn at the latest by July 2008. 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 identifying any or all such patent rights. This document supersedes EN 12518:2000. The significant technical difference between this edition and EN 12518:2000 is as follows: deletion of this reference to EC Directive 80/778/EEC of July, 15 1980 in order to take into account of the last Directive in force (see [1]). The designation and grading of products have changed:  Class: used for grouping properties of the main component of the chemical (Table 1);  Grade: used in relation to the levels of impurities (Tables 2 and 3);  Type: used for different levels of chemical parameters (Table 4). 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 12518:2008



EN 12518:2008 (E) 4 Introduction 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 or 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 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.
SIST EN 12518:2008



EN 12518:2008 (E) 5 1 Scope This European Standard is applicable to high-calcium lime used for treatment of water intended for human consumption. It describes the characteristics of high-calcium lime and specifies the requirements and the corresponding test methods for high-calcium lime. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex B). 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 12485, Chemicals used for treatment of water intended for human consumption - Calcium carbonate, high-calcium lime and half-burnt dolomite - Test methods 3 Description 3.1 Identification 3.1.1 General High-calcium limes are calcium oxide, calcium hydroxide and aqueous suspension of calcium hydroxide (milk of lime). 3.1.2 Chemical names a) Calcium oxide; b) Calcium hydroxide. 3.1.3 Synonym or common names a) Calcium oxide: Pulverized high-calcium lime, quicklime, lump high-calcium lime; b) Calcium hydroxide: Hydrated high-calcium lime, calcium hydroxide - aqueous suspension (milk of lime). 3.1.4 Relative molecular mass a) Calcium oxide: 56,08; b) Calcium hydroxide: 74,09. 3.1.5 Empirical formula a) Calcium oxide: CaO; b) Calcium hydroxide: Ca(OH)2. 3.1.6 Chemical formula a) Calcium oxide: CaO; SIST EN 12518:2008



EN 12518:2008 (E) 6 b) Calcium hydroxide: Ca(OH)2. 3.1.7 CAS Registry Number 1)
a) Calcium oxide: 1305-78-8; b) Calcium hydroxide: 1305-62-0. 3.1.8 EINECS reference 2) a) Calcium oxide: 215-138-9; b) Calcium hydroxide: 215-137-3. 3.2 Commercial forms High-calcium lime is available in the following commercial forms:  pulverized high calcium lime (quicklime): white powder (CaO);  lump high-calcium lime (quicklime): white lump (CaO);  hydrated high-calcium lime: white powder, (Ca(OH)2);  milk of lime: aqueous suspension of calcium hydroxide (usual content of calcium hydroxide is a mass fraction between 10 % to 40 %. 3.3 Physical properties 3.3.1 Appearance a) Calcium oxide: white, lumps or powder; b) Calcium hydroxide: white powder. Calcium hydroxide suspension: aqueous, milky suspension. 3.3.2 Density a) Calcium oxide: 3,35 kg/dm3 at 20 °C. Bulk density: 800 kg/m3 to 1 200 kg/m3; b) Calcium hydroxide: 2,24 kg/dm3 at 20 °C. Bulk density: 300 kg/m3 to 600 kg/m3. 3.3.3 Solubility (in water) Calcium oxide: not applicable.
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. SIST EN 12518:2008



EN 12518:2008 (E) 7 Calcium hydroxide: 1,85 g/l at
0 °C 1,76 g/l at 10 °C 1,65 g/l at 20 °C 1,53 g/l at 30 °C 1,40 g/l at 40 °C 1,28 g/l at 50 °C 1,16 g/l at 60 °C 1,04 g/l at 70 °C 0,92 g/l at 80 °C 0,81 g/l at 90 °C 0,71 g/l at 100 °C.
3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) a) Calcium oxide: 2 850 °C; b) Calcium hydroxide: Decomposes at 580 °C and forms calcium oxide and water.
3.3.6 Melting point a)
Calcium oxide: 2570 °C; b)
Calcium hydroxide: Decomposes at 580 °C and forms calcium oxide and water. Calcium hydroxide suspension freezes at 0 °C. 3.3.7 Specific heat Not applicable. 3.3.8 Viscosity (dynamic) For calcium hydroxide suspension depends on concentration and particle size. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable.
3) 100 kPa = 1 bar. SIST EN 12518:2008



EN 12518:2008 (E) 8 3.4 Chemical properties Aqueous suspensions are strongly alkaline. Calcium oxide (CaO) reacts with water to form calcium hydroxide Ca(OH)2, and with acids to form calcium salts. These reactions are highly exothermic. 4 Purity criteria 4.1 General This European Standard specifies the minimum purit
...