1、February 2013 Translation by DIN-Sprachendienst.English price group 12No 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).I
2、CS 71.100.80!$*J“1950739www.din.deDDIN EN 12126Chemicals used for treatment of water intended for humanconsumption Liquefied ammonia;English version EN 12126:2012,English translation of DIN EN 12126:2013-02Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Ammoniak, flssig;Englische F
3、assung EN 12126:2012,Englische bersetzung von DIN EN 12126:2013-02Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Ammoniac liqufi;Version anglaise EN 12126:2012,Traduction anglaise de DIN EN 12126:2013-02SupersedesDIN EN 12126:2005-09www.beuth.deDocument comprise
4、s 20 pagesIn case of doubt, the German-language original shall be considered authoritative.02.13DIN EN 12126:2013-02 2 A comma is used as the decimal marker. National foreword This document (EN 12126:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France
5、). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and sh
6、ould note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). Since, as of the publication of this standard, liquefied ammonia is not mentioned in the list of substances for trea
7、tment and disinfection of water in accordance with article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drinking water. The DIN Standards corresponding to the International Standards referred to in this document are as follows, whereby EN ISO Standards are only lis
8、ted below if these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 12126:2005-09 as follows: a) specifications concerning hazard and safety related symbols have been brought in line with the “Globally Harmoni
9、zed System of Classification, Labelling and Packaging of Chemicals (GHS)” (Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien). Previous editions DIN EN 12126: 1998-12, 2005-09 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use S
10、pecification and test methods Verordnung ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (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)*)*
11、)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12126 November 2012 ICS 71.100.80 Supersedes EN 12126:2005English Version Chemicals used for treatment of water inten
12、ded for human consumption - Liquefied ammonia Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Ammoniac liqufiProdukte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Ammoniak, flssig This European Standard was approved by CEN on 23 September 2012. C
13、EN 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 ap
14、plication 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 any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
15、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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
16、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-
17、1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12126:2012: EEN 12126:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Purity criteria 75 Test methods 86 Labell
18、ing Transportation Storage . 12Annex A (informative) General information on liquefied ammonia 16Annex B (normative) General rules relating to safety . 17Bibliography . 18DIN EN 12126:2013-02 EN 12126:2012 (E) 3 Foreword This document (EN 12126:2012) has been prepared by Technical Committee CEN/TC 16
19、4 “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 May 2013, and conflicting national standards shall be withdrawn at the latest by May 20
20、13. 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 12126:2005. The significant technical differences betw
21、een this edition and EN 12126:2005 are as follows: Modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the latest Directive in force. According to the CEN/CENELEC Internal Regulations, the national standards organisations
22、 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, Latvia, Lithuania, Luxembourg, Malta, N
23、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12126:2013-02 EN 12126:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by the product cov
24、ered 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 regula
25、tions 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 s
26、ubject to regulation or control by National Authorities. DIN EN 12126:2013-02 EN 12126:2012 (E) 5 1 Scope This European Standard is applicable to liquefied ammonia used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of liquefied
27、 ammonia and refers to the corresponding analytical methods. It gives information for its use in water treatment. It also determines the rules relating to the safe handling and use of liquefied ammonia (see Annex B). 2 Normative references The following documents, in whole or in part, are normativel
28、y referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and
29、test methods (ISO 3696) ISO 7103, Liquefied anhydrous ammonia for industrial use Sampling Taking a laboratory sample ISO 7105, Liquefied anhydrous ammonia for industrial use Determination of water content Karl Fischer Method ISO 7106, Liquefied anhydrous ammonia for industrial use Determination of o
30、il content Gravimetric and infra-red spectrometric methods 3 Description 3.1 Identification 3.1.1 Chemical name Ammonia liquefied, anhydrous. 3.1.2 Synonym or common name Ammonia. 3.1.3 Relative molecular mass 17,03. 3.1.4 Empirical formula NH3. 3.1.5 Chemical formula NH3. 3.1.6 CAS Registry Number
31、1)7664-41-7. 1) Chemical Abstracts Service Registry Number. DIN EN 12126:2013-02 EN 12126:2012 (E) 6 3.1.7 EINECS reference 2)231-635-3. 3.2 Commercial form The product is available as liquefied gas. 3.3 Physical properties 3.3.1 Appearance and odour The product is colourless liquid with a character
32、istic pungent odour. 3.3.2 Density The density of the gas is 0,771 g/l at 101,3 kPa 3)and 0 C. The density of the liquid is 0,682 g/ml at 101,3 kPa and -34 C, and 0,61 g/ml at 850 kPa and 20 C. 3.3.3 Solubility (in water) The solubility of the product in water is 900 g/l at 0 C, 520 g/l at 20 C, and
33、 407 g/l at 30 C. 3.3.4 Vapour pressure The vapour pressure of the product is 400 kPa at 0 C, 850 kPa at 20 C and 2 035 kPa at 50 C. 3.3.5 Boiling point at 100 kPa 3)The boiling point of the product is -33,4 C at 101,3 kPa. 3.3.6 Melting point The melting point of the product is -77,7 C at 101,3 kPa
34、. 3.3.7 Specific heat The specific heat of the product is 4,61 kJ/(kg K) at 0 C and 4,86 kJ/(kg K) at 40 C. 3.3.8 Viscosity, dynamic The viscosity of the product is 0,254 mPa.s at 33 C and 101,3 kPa. 3.3.9 Critical temperature 132,4 C. 3.3.10 Critical pressure 11 450 kPa. 2) European Inventory of Ex
35、isting Commercial Chemical Substances. 3) 100 kPa = 1 bar. DIN EN 12126:2013-02 EN 12126:2012 (E) 7 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Ammonia reacts violently with halogens, acids, acid halides, acid anhydrides and oxidising agents. It reacts with zinc, copper, tin and
36、 their alloys. Mixtures of volume fraction of 15 % to 30 % of ammonia with air are explosive. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for liquefied ammonia used for the treatment of water intended for human consumption. Limits are given for impu
37、rities 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. Users of this product should check the national regulations in order to clari
38、fy whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurities and chemical
39、 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 leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2
40、Composition of commercial product Liquefied ammonia shall not contain less than a mass fraction of 99,8 % of NH3. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 Impurities Impurity Limit Water max Mass fraction 0,1 % Permanent gases an
41、d methane max Volume fraction 0,1 % Oil max 5 mg/kg 4.4 Chemical parameters The chemicals parameters defined in the EU Water Directive (see 1) are not found in liquefied ammonia. Cyanides, pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. DIN EN 12126:
42、2013-02 EN 12126:2012 (E) 8 5 Test methods 5.1 Sampling Follow the sampling method according to ISO 7103. 5.2 Analyses 5.2.1 Main product The ammonia concentration is calculated by subtracting the contents of the main impurities from mass fraction 100 %. 5.2.2 Impurities 5.2.2.1 Water The water cont
43、ent shall be determined in accordance with ISO 7105. 5.2.2.2 Oil content The oil content shall be determined in accordance with ISO 7106. 5.2.3 Permanent gases and methane 5.2.3.1 Principle The method is a gas chromatographic determination of inert gases and methane in liquid ammonia, determined as
44、a volume fraction. The content of trace contaminants is determined by gas chromatography according to an external standard method. Metering from the gas pipette is carried out by means of pressure-controlled feed via a fixed-volume sampling valve. Liquefied ammonia is evaporated prior to the gas chr
45、omatographic test in a special steel gas pipette. 5.2.3.2 Reagents and materials 5.2.3.2.1 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.3.2.2 Carrier gas Helium, minimum purity volume fraction 99,9 %. 5.
46、2.3.2.3 Calibration gas mixture of the following composition: hydrogen volume fraction 91 %; nitrogen volume fraction 5 %; methane volume fraction 3 %; DIN EN 12126:2013-02 EN 12126:2012 (E) 9 sum of oxygen and argon volume fraction 1 %. 5.2.3.2.4 Material for preparation of the column Molecular sie
47、ve 13 X of particle size 250 m to 360 m, or any other equivalent suitable material. 5.2.3.3 Apparatus 5.2.3.3.1 Gas chromatographic apparatus. Any suitable gas chromatograph, fitted with a thermal conductivity detector, may be used. 5.2.3.3.1.1 Characteristics of the gas chromatographic apparatus: C
48、olumn temperature: typically 40 C isothermal conditions. Detector temperature: typically 130 C. Filament temperature: typically 200 C. 5.2.3.3.1.2 Carrier gas flow rate The carrier gas flow rate shall be approximately 25 ml/min. It is usually measured at column outlet and at ambient temperature. 5.2
49、.3.3.2 Injection equipment. Stainless steel gas sample valve with a loop of 2 ml capacity, operating under the following conditions: temperature: ambient to 50 C; pressure: atmospheric. 5.2.3.3.3 Column. 5.2.3.3.3.1 Construction The column may be made of any suitable material that does not react with the test portion, for example stainless steel. Typical dimensions are as follows: a) length: according to the test method used but typically 4 m; b) diame
