ISO/PAS 22241-1:2005
(Main)Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
ISO PAS 22241-1:2005 specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate converters 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 this ISO 22241, the term "NOx reduction agent AUS 32" will be abbreviated to "AUS 32".
Moteurs diesel — Agent AUS 32 de réduction des NOx — Partie 1: Exigences de qualité
General Information
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Standards Content (Sample)
PUBLICLY ISO/PAS
AVAILABLE 22241-1
SPECIFICATION
First edition
2005-11-01
Diesel engines — NOx reduction agent
AUS 32 —
Part 1:
Quality requirements
Moteurs diesel — Agent AUS 32 de réduction des NOx —
Partie 1: Exigences de qualité
Reference number
ISO/PAS 22241-1:2005(E)
©
ISO 2005
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ISO/PAS 22241-1:2005(E)
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ISO/PAS 22241-1:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Designation . 2
5 Requirements and testing. 2
6 Packaging, transportation and storage. 2
7 Marking . 2
Annex A (informative) Chemical characteristics. 4
Annex B (informative) Precision of test methods . 5
Annex C (informative) Packaging, transportation and storage . 6
Annex D (informative) Chemical tracer . 7
© ISO 2005 – All rights reserved iii
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ISO/PAS 22241-1:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of normative document:
— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an
International Standard or be withdrawn.
ISO/PAS 22241-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 5,
Engine tests.
ISO/PAS 22241 consists of the following parts, under the general title Diesel engines — NOx reduction agent
AUS 32:
⎯ Part 1: Quality requirements
⎯ Part 2: Test methods
iv © ISO 2005 – All rights reserved
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ISO/PAS 22241-1:2005(E)
Introduction
In order to protect the environment, keeping the air quality as clean as possible, exhaust emissions
regulations in the world have been strengthened considerably. In heavy-duty commercial road vehicles
powered by a diesel engine, 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 minimum 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 of the SCR
converter systems. ISO 22241 provides the Publicly Available Specifications and test methods needed by the
manufacturers of heavy commercial road vehicles and their engines, by converter manufacturers, by
producers and distributors of the urea solution and by fleet operators.
The urea solution as specified in this Publicly Available Specification is commercially available under the
®
registered trademark AdBlue . ISO takes no position concerning the evidence, validity and scope of this
trademark right.
®
Licensees of the trademark AdBlue have committed themselves to comply with the requirements of this
Publicly Available Specification.
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 world. 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 Publicly Available Specification and does not
constitute an endorsement of the trademark.
© ISO 2005 – All rights reserved v
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PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 22241-1:2005(E)
Diesel engines — NOx reduction agent AUS 32 —
Part 1:
Quality requirements
1 Scope
This Publicly Available Specification specifies the quality characteristics of the NOx reduction agent AUS 32
(aqueous urea solution) which is needed to operate converters with selective catalytic reduction, so-called
SCR (Selective Catalytic Reduction) converters, in motor vehicles with diesel engines. SCR converters are
particularly suitab
...
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