1、BSI Standards PublicationBS ISO 18611-1:2014Ships and marine technology Marine NOx reduction agentAUS 40Part 1: Quality requirementsBS ISO 18611-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 18611-1:2014.The UK participation in its preparation was entr
2、usted to TechnicalCommittee SME/32/-/2, Ships and marine technology - Maritimeenvironment protection.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are resp
3、onsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83574 2ICS 13.020.99; 47.020.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of t
4、heStandards Policy and Strategy Committee on 30 September 2014.Amendments issued since publicationDate Text affectedBS ISO 18611-1:2014 ISO 2014Ships and marine technology Marine NOx reduction agent AUS 40 Part 1: Quality requirementsNavires et technologie marine Agents rducteurs NOx marins AUS 40 P
5、artie 1: Exigences de qualitINTERNATIONAL STANDARDISO18611-1First edition2014-10-01Reference numberISO 18611-1:2014(E)BS ISO 18611-1:2014ISO 18611-1:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication
6、 may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of
7、the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 18611-1:2014ISO 18611-1:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normat
8、ive references 13 Terms and definitions . 14 Designation 25 Requirements and testing . 26 Marking 3Annex A (informative) Chemical characteristics 4Annex B (informative) Precision of test methods . 5Bibliography 6BS ISO 18611-1:2014ISO 18611-1:2014(E)ForewordISO (the International Organization for St
9、andardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the rig
10、ht to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures
11、 used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rul
12、es of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights ident
13、ified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation
14、on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is
15、ISO/TC 8, Ships and marine technology, Subcommittee SC 2, Marine environment protection.ISO 18611 consists of the following parts, under the general title Ships and marine technology Marine NOx reduction agent AUS 40: Part 1: Quality requirements Part 2: Test methods Part 3: Handling, transportation
16、 and storageiv ISO 2014 All rights reservedBS ISO 18611-1:2014ISO 18611-1:2014(E)IntroductionIn order to protect the environment and to enhance air quality, exhaust emissions regulations around the world are continuously strengthened. For ships with large combustion engines, particulate matter (PM),
17、 nitrogen oxide (NOx) emissions, and sulfur dioxide emissions are the main concern, and efforts have been focused on the development of technology that can reduce them effectively with minimum fuel economy penalty. Selective catalytic reduction (SCR) converters using a urea solution as the reducing
18、agent is considered to be a key technology for reducing NOx emissions. The quality of the urea solution used for that technology needs to be specified to ensure reliable and stable operation of the SCR converter systems. The ISO 18611 series provides the specifications of urea solution for quality c
19、haracteristics, handling, transportation, and storage, as well as the test methods needed by manufacturers of SCR converters, by engine manufacturers, by producers, distributors, and by fleet operators/ship owners.Efficient expanding of the use of urea SCR technology requires a consolidated framewor
20、k that can be followed by producers, end users, OEMs, and catalyst suppliers. ISO 2014 All rights reserved vBS ISO 18611-1:2014BS ISO 18611-1:2014Ships and marine technology Marine NOx reduction agent AUS 40 Part 1: Quality requirements1 ScopeThis part of ISO 18611 specifies the quality characterist
21、ics of the marine NOx reduction agent, aqueous urea solution at 40 % concentration (AUS 40), which is needed to operate so-called SCR (selective catalytic reduction) converters. In marine applications, for example, for engine exhaust gas treatment, SCR converters are particularly suitable for select
22、ively reducing the nitrogen oxide (NOx) emissions of internal combustion engines and boilers.This International Standard is covering quality requirements and guidelines for AUS 40 for marine applications, irrespective of manufacturing method or technique.In the remaining parts of ISO 18611, the term
23、 “NOx reduction agent” will be abbreviated to “AUS 40”.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest e
24、dition of the referenced document (including any amendments) applies.ISO 3675, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer methodISO 12185, Crude petroleum and petroleum products Determination of density Oscillating U-tube methodISO 18611-2, Ships and
25、 marine technology Marine NOx reduction agent AUS 40 Part 2: Test methods3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1NOx reduction agent AUS 40aqueous urea solution, manufactured from technically pure urea with no addition (see NOTE) of any
26、other substances and pure water, having a urea content of 40 % and with the quality characteristics defined in Clause 5Note 1 to entry: With the possible exception of a tracer in accordance with the requirement in Table 1.INTERNATIONAL STANDARD ISO 18611-1:2014(E) ISO 2014 All rights reserved 1BS IS
27、O 18611-1:2014ISO 18611-1:2014(E)3.2technically pure ureaindustrially produced grade of urea with traces of biuret, ammonia, and water only, low in aldehydes or other substances such as anticaking agent, and free of contaminants such as sulphur and its compounds, chloride, nitrate, or other compound
28、sNote 1 to entry: For the contaminants mentioned above, which are not a result of the urea production process, limit values and analytical methods are not considered, as this definition excludes urea grades usually used in agriculture, which might contain such chemical compounds.3.3pure watergrade o
29、f water, produced, for example, by single distillation, by de-ionization, by ultra-filtration, or by reverse osmosisNote 1 to entry: This is based on the definition of water grade 3 of ISO 3696.4 DesignationAUS 40, in compliance with the requirements of this International Standard, shall be designat
30、ed with the code AUS 40 and the reference number of this series of International Standards:AUS 40 ISO 186115 Requirements and testingThe quality characteristics of the AUS 40 are specified in Table 1. They shall be continuously monitored by the manufacturer following a valid testing plan.Compliance
31、with the limits specified in Table 1 shall be verified with the test methods indicated.NOTE 1 See Annex A with respect to the chemical characteristics of urea and the physical properties of AUS 40.NOTE 2 See Annex B with respect to precision of the test methods.2 ISO 2014 All rights reservedBS ISO 1
32、8611-1:2014ISO 18611-1:2014(E)Table 1 Quality characteristicsCharacteristics UnitLimitsTest methodsmin. max.Urea contenta% (m/m)d39 41ISO 18611-2, Annex BeISO 18611-2, Annex CeDensity at 20 Cbkg/m31 105 1 177 ISO 3675 or ISO 12185Refractive index at 20 Cc 1,394 7 1,398 2 ISO 18611-2, Annex CAlkalini
33、ty as NH3% (m/m)d 0,5 ISO 18611-2, Annex DBiuret % (m/m)a 0,8 ISO 18611-2, Annex EAldehydes mg/kg 100 ISO 18611-2, Annex FInsoluble matter mg/kg 50 ISO 18611-2, Annex GPhosphate (PO4) mg/kg 1 ISO 18611-2, Annex HCalcium mg/kg 1ISO 18611-2, Annex IIron mg/kg 1Magnesium mg/kg 1Sodium mg/kg 1Potassium
34、mg/kg 1Identityidentical to referenceISO 18611-2, Annex JNOTE 1 Should it be necessary to add a tracer to AUS 40, it shall be ensured that the quality of AUS 40 specified in this table is not impaired and that the tracer does not damage the SCR system.NOTE 2 In establishment of these limit values, t
35、he terms of ISO 4259 have been applied in fixing a maximum and minimum value, a minimum difference of 4 R (R is the Reproducibility of the test method) has been taken into account. However, in case of urea content, the 4 R rule has not been applied in order to keep the high quality.NOTE 3 The values
36、 quoted regarding urea content, density, and refractive index are “true values” (see ISO 4259 for the definition of true values).NOTE 4 The manufacturer of AUS 40 should aim at the target values defined in footnotes a, b, and c.NOTE 5 Should it be necessary to clarify the questions as to whether a g
37、iven urea solution meets the requirement of the specification, the terms of ISO 4259 should be applied.aTarget value 40 % (m/m).bTarget value 1 110 kg/m3. The max. value is for the urea solution containing 0,8 % Biuret.cTarget value 1,396 5. The max. value is for the urea solution containing 0,8 % B
38、iuret.dFor the purposes of this International Standard, the term “% (m/m)” is used to represent the mass fraction of a material.eCalculated without subtracting nitrogen from ammonia.6 MarkingDistribution pumps and containers for the distribution of AUS 40, in compliance with the requirements of this
39、 part of ISO 18611 shall be marked with the designation as specified in Clause 4. ISO 2014 All rights reserved 3BS ISO 18611-1:2014ISO 18611-1:2014(E)Annex A (informative) Chemical characteristicsA.1 Chemical description of ureaChemical formula: (NH2)2CO;Molar mass: 60,06 g/mol;CAS-Nr.: 57-13-6 (CAS
40、: Chemical Abstracts Service).A.2 Physical properties of AUS 40Appearance: colourless clear liquid;Incipient crystallization: 0 C;Viscosity (at 25 C): approx. 1,38 mPas;Thermal conductivity (at 25 C): approx. 0,55 W/mK;Specific heat (at 25 C): approx. 3,30 kJ/kgK;pH: 104 ISO 2014 All rights reserved
41、BS ISO 18611-1:2014ISO 18611-1:2014(E)Annex B (informative) Precision of test methodsCharacteristics Unit Repeatability rReproducibility RUrea content (total nitrogen) % (m/m) 0,4 1,0Urea content (refractive index) % (m/m) 0,1 1,0Refractive index 0,000 1 0,001Density according to ISO 3675 kg/m30,5 1
42、,2Density according to ISO 12185 kg/m30,2 0,5Alkalinity as NH3% (m/m) 0,01 0,2 xBiuret % (m/m) 0,01 0,04Aldehydes mg/kg 0,14 0,5 xInsoluble matter mg/kg 0,23 x 0,38 xPhosphate (PO4) mg/kg 0,02 0,03Calcium mg/kg 0,02 0,1 xIron mg/kg 0,01 0,3 xMagnesium mg/kg 0,02 0,3 xSodium mg/kg 0,03 0,5 xPotassium
43、 mg/kg 0,03 0,5 xNOTE 1 x is mean value.NOTE 2 The precision of the test methods for the determination of the density was taken from the existing ISO 3675 and ISO 12185.NOTE 3 The precision of all other test methods referenced in this part of ISO 18611 was obtained in an interlaboratory test program
44、me conducted in the year 2004 in conjunction with the establishment of ISO 22241. 18 laboratories in Austria, Germany, and the Netherlands participating. The data obtained were evaluated according to ISO 4259. ISO 2014 All rights reserved 5BS ISO 18611-1:2014ISO 18611-1:2014(E)Bibliography1 ISO 3696
45、, Water for analytical laboratory use Specification and test methods2 ISO 4259, Petroleum products Determination and application of precision data in relation to methods of test6 ISO 2014 All rights reservedBS ISO 18611-1:2014BS ISO 18611-1:2014ISO 18611-1:2014(E) ISO 2014 All rights reservedICS 13.
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