1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 1: Quality requirementsICS 43.060.40Diesel engines NOx reduction agent AUS 32 BRITISH STANDARD
2、BS ISO 22241-1:2006BS ISO 22241-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006ISBN 0 580 49514 0Amendments issued since publicationAmd. No. Date CommentsThis publication does not purport to include all the nec
3、essary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 22241-1:2006. It supersedes DD ISO/PAS 2
4、2241-1:2005 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles.A list of organizations represented on MCE/22 can be obtained on request to its secretary.Reference numberISO 22241-1:2006(E)INTERNATIONAL STANDARD ISO22241-1
5、First edition2006-10-15Diesel engines NOx reduction agent AUS 32 Part 1: Quality requirements Moteurs diesel Agent AUS 32 de rduction des NOx Partie 1: Exigences de qualit BS ISO 22241-1:2006ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national
6、 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 right to be represented on that committee. Internationa
7、l 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. International Standards are drafted in accordance with the rules
8、given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at lea
9、st 75 % of the member bodies casting a vote. 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. ISO 22241-1 was prepared by Technical Committee ISO/TC 2
10、2, Road vehicles, Subcommittee SC 5, Engine tests. This first edition cancels and replaces ISO/PAS 22241-1:2005, which has been technically revised. ISO 22241 consists of the following parts, under the general title Diesel engines NOx reduction agent AUS 32: Part 1: Quality requirements Part 2: Test
11、 methods The following parts are under preparation: Part 3: Packaging, transportation and storage Part 4: Refilling interface Annexes A, B and C are for information only. BS ISO 22241-1:2006iv Introduction In order to protect the environment, keeping the air quality as clean as possible, exhaust emi
12、ssions regulations around the world have been strengthened considerably. In motor vehicles with diesel engines, particulate matters (PM) and nitrogen oxide (NOx) emissions are the main concern, and efforts have been focused on the development of technology which can reduce them effectively with mini
13、mum fuel economy penalty. Selective catalytic reduction (SCR) converters using urea solution as the reduction 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
14、 of the SCR converter systems. The ISO 22241 series provides the specifications for quality characteristics, for handling, transportation and storage and for the refilling interface as well as the test methods, needed by the manufacturers of motor vehicles and their engines, by converter manufacture
15、rs, by producers and distributors of the urea solution and by fleet operators. The urea solution as specified in this part of ISO 22241 is commercially available, e.g. under the registered trademark AdBlue.ISO takes no position concerning the evidence, validity and scope of this trademark right. Lic
16、ensees of the trademark AdBluehave committed themselves to comply with the requirements of this part of ISO 22241. The holder of this trademark right has assured ISO that he is willing to negotiate licenses under reasonable and non-discriminatory terms and conditions with applicants throughout the w
17、orld. In this respect, the statement of the holder of this trademark right is registered with ISO. Information may be obtained from: VDA - Verband der Automobilindustrie e.V. 60325 Frankfurt/M Germany This information is given for the convenience of the users of this International Standard and does
18、not constitute an endorsement of the trademark. BS ISO 22241-1:20061Diesel engines NOx reduction agent AUS 32 Part 1: Quality requirements 1 Scope This part of ISO 22241 specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate convert
19、ers with selective catalytic reduction, so-called SCR (selective catalytic reduction) converters, in motor vehicles with diesel engines. SCR converters are particularly suitable for selectively reducing the nitrogen oxide (NOx) emissions of diesel engines. In the remaining parts of ISO 22241, the te
20、rm “NOx reduction agent AUS 32” will be abbreviated to “AUS 32”. 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 docume
21、nt (including any amendments) applies. ISO 3675, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method ISO 4259, Petroleum products Determination and application of precision data in relation to methods of test ISO 12185, Crude petroleum and petroleum pr
22、oducts Determination of density Oscillating U-tube method ISO 22241-2, Diesel engines NOx reduction agent AUS 32 Part 2: Test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 NOx reduction agent AUS 32 aqueous urea solution, manufactur
23、ed from technically pure urea with no addition (see NOTE) of any other substances and pure water, having a urea content of 32,5 % and with the quality characteristics defined in Clause 5 NOTE With the possible exception of a tracer in accordance with the requirement in Table 1. 3.2 technically pure
24、urea industrially produced grade of urea with traces of biuret, ammonia and water only, free of aldehydes or other substances such as anticaking agent, and free of contaminants such as sulphur and its compounds, chloride, nitrate or other compounds NOTE For the contaminants mentioned above, which ar
25、e 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. BS ISO 22241-1:20062 3.3 pure water grade of water, produced for example by single
26、distillation, by de-ionization, by ultra-filtration or by reverse osmosis NOTE This is based on the definition of water grade 3 of ISO 3696. 4 Designation AUS 32, in compliance with the requirements of this International Standard, shall be designated with the code AUS 32 and the reference number of
27、this series of International Standards: AUS 32 ISO 22241 5 Requirements and testing The quality characteristics of the AUS 32 are specified in Table 1. They shall be continuously monitored by the manufacturer following a valid testing plan. Compliance with the limits specified in Table 1 shall be ve
28、rified with the test methods indicated. NOTE 1 See Annex A with respect to the chemical characteristics of urea and the physical properties of AUS 32. NOTE 2 See Annex B with respect to precision of the test methods. 6 Handling, transportation and storage Recommendations for the logistics chain from
29、 the factory to the vehicle, in order to maintain the high quality of the product, are given in Annex C. NOTE Requirements and recommendations for handling, transportation and storage will be specified in ISO 22241-3 which, once published, will replace Annex C. 7 Marking Distribution pumps and conta
30、iners for the distribution of AUS 32, in compliance with the requirements of this part of ISO 22241, shall be marked with the designation as specified in Clause 4. BS ISO 22241-1:20063Table 1 Quality characteristics Limits Characteristics Unit min. max. Test methods Urea content a% (m/m) d31,8 33,2
31、ISO 22241-2 Annex B eISO 22241-2 Annex CeDensity at 20 C bkg/m31 087,0 1 093,0 ISO 3675 or ISO 12185 Refractive index at 20 C c 1,381 4 1,384 3 ISO 222412 Annex C Alkalinity as NH3% (m/m) d 0,2 ISO 222412 Annex D Biuret % (m/m) d 0,3 ISO 222412 Annex E Aldehydes mg/kg 5 ISO 222412 Annex F Insoluble
32、matter mg/kg 20 ISO 222412 Annex G Phosphate (PO4) mg/kg 0,5 ISO 222412 Annex H Calcium mg/k 0,5 Iron mg/kg 0,5 Copper mg/k 0,2 Zinc mg/kg 0,2 Chromium mg/k 0,2 Nickel mg/kg 0,2 Aluminium mg/k 0,5 Magnesium mg/kg 0,5 Sodium mg/k 0,5 Potassium mg/kg 0,5 ISO 222412 Annex I Identity identical to refere
33、nce ISO 222412 Annex J Should it be necessary to add a tracer to AUS 32, it shall be ensured that the quality of AUS 32 specified in this Table is not impaired and that the tracer does not damage the SCR system. NOTE 1 In establishment of these limit values, the terms of ISO 4259 have been applied i
34、n 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 2 The values quoted regarding urea content, density
35、 and refractive index are “true values” (see ISO 4259 for definition of true values). NOTE 3 The manufacturer of AUS 32 should aim at the target values defined in footnotes a, b and c. NOTE 4 Should it be necessary to clarify the questions as to whether a given urea solution meets the requirement of
36、 the specification, the terms of ISO 4259 should be applied. aTarget value 32,5 % (m/m). bTarget value 1 090,0 kg/m3. cTarget value 1,382 9. dFor the purposes of this International Standard, the term “% (m/m)” is used to represent the mass fraction of a material. eCalculated without subtracting nitr
37、ogen from ammonia. BS ISO 22241-1:20064 Annex A (informative) Chemical characteristics A.1 Chemical description of urea Chemical formula: (NH2)2CO; Molar mass: 60,06 g/mol; CAS-Nr.: 57-13-6 (CAS : Chemical Abstracts Service). A.2 Physical properties of AUS 32 Aspect: colourless clear liquid; Incipie
38、nt crystallization: 11,5 C; Viscosity (at 25 C): approx. 1,4 mPas; Thermal conductivity (at 25 C): approx. 0,570 W/mK; Specific heat (at 25 C): approx. 3,40 kJ/kgK; Surface tension (at 20 C): min. 65 mN/m. BS ISO 22241-1:20065Annex B (informative) Precision of test methods Characteristics Unit Repea
39、tability r Reproducibility R Urea content (total nitrogen) % (m/m) 0,4 1,0 Urea content (refractive index) % (m/m) 0,1 1,0 Refractive index 0,000 1 0,001 Density according to ISO 3675 kg/m30,5 1,2 Density according to ISO 12185 kg/m30,2 0,5 Alkalinity as NH3% (m/m) 0,01 0,2 x Biuret % (m/m) 0,01 0,0
40、4 Aldehydes mg/kg 0,14 0,5 x Insoluble matter mg/kg 0,23 x 0,38 x Phosphate (PO4) mg/kg 0,02 0,03 Calcium mg/kg 0,02 0,1 x Iron mg/k 0,01 0,3 x Copper mg/kg 0,01 0,2 x Zinc mg/k 0,01 0,3 x Chromium mg/kg 0,01 0,3 x Nickel mg/k 0,01 0,3 x Aluminium mg/kg 0,02 0,3 x Magnesium mg/k 0,02 0,3 x Sodium mg
41、/kg 0,03 0,5 x Potassium mg/k 0,03 0,5 x x is mean value. NOTE 1 The precision of the test methods for determination of the density was taken from the existing ISO 3675 and ISO 12185. NOTE 2 The precision of all other test methods referenced in this part of ISO 22241 was obtained in an interlaborato
42、ry test programme conducted in the year 2004 with 18 laboratories in Austria, Germany and the Netherlands participating. The data obtained were evaluated according to ISO 4259. BS ISO 22241-1:20066 Annex C (informative) Handling, transportation and storage Transportation of the AUS 32 should be in i
43、nsulated tanks or in plastic containers. Alloyed steels, various plastic materials and plastic-coated metal containers are suitable container materials. Non-alloyed steels, copper, copper-containing alloys and zinc-coated steels should not be used. Any other material not cited above should be tested
44、 regarding corrosion resistance and possible influences on the product specification. The AUS 32 should leave the manufacturer for shipping at a temperature of 30 C maximum. To avoid crystal precipitation or hydrolysis of the AUS 32, storage at normal conditions (optimum up to 25 C) is recommended.
45、Information on further properties of AUS 32 is given in the material safety data sheet, which contains indications on the hazard ranking and regulations to be respected as well as measures required to be taken for the protection of persons and of the environment when handling the product. BS ISO 222
46、41-1:20067Bibliography ISO 3696, Water for analytical laboratory use Specification and test methods BS ISO 22241-1:2006BS ISO BSI389 Chiswick High RoadLondonW4 4AL22241-1:2006BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It present
47、s the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to i
48、mprove the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 90
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