ISO 22241-1:2019

Name: ISO 22241-1:2019 — Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
SKU: ISO 22241-1:2019
Price: 10800 RUB
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Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements

Название (английский):

ISO 22241-1:2019

Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 12 февраля 2019 г.
Издание:: ISO IS 22241 edition 2 version 1
ICS:: 43.060.40

Тип поставки:

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Язык документа:

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Цена:10 800 ₽

Описание (английский):

This document specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate selective catalytic reduction (SCR) converter systems in motor vehicles with diesel engines. SCR converter systems are particularly suitable for selectively reducing the nitrogen oxide (NOx) emissions of diesel engines.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 22241-1:2019 specifies the quality requirements for AUS 32, the aqueous urea solution (commonly known as DEF, AdBlue®, ARLA 32®) used as the NOx reduction agent in selective catalytic reduction (SCR) systems on diesel engines. The standard defines composition, purity limits, physical characteristics and testing requirements needed to ensure reliable and stable SCR operation and to reduce engine NOx emissions without damaging catalysts.

Key topics and technical requirements

Urea content: Target value 32.5% (mass fraction); permissible range 31.8% – 33.2%.

Refractive index (nD20): Specified range ≈ 1.3814 – 1.3843 (used as a quality control correlate to urea content, adjusted for biuret).

Impurities and limits:

Alkalinity (as NH3): ≤ 0.2% (mass fraction)
Biuret: ≤ 0.3% (mass fraction)
Aldehydes: ≤ 5 mg/kg
Insoluble matter: ≤ 20 mg/kg
Phosphate (PO4): ≤ 0.5 mg/kg (referee method indicated)
Trace metals: typical maximums (e.g., Al, Ca, Fe, K, Mg, Na ≤ 0.5 mg/kg; Cr, Cu, Ni, Zn ≤ 0.2 mg/kg)

Physical properties (informative): density at 20 °C ≈ 1087–1093 kg/m3, incipient crystallization −11.5 °C, viscosity ~1.4 mPa·s at 25 °C.

Testing and precision: Test methods and precision values are referenced in ISO 22241-2:2019 (test methods) and precision data are given in Annex B. Specified referee methods apply in case of dispute.

Production control and marking: Manufacturers must implement production control plans and mark containers/pumps with the designation (e.g., “AUS 32 ISO 22241-1”).

Applications and who uses it

Vehicle and engine manufacturers: to specify compatible DEF quality for SCR systems and warranty considerations.

SCR converter and catalyst suppliers: to prevent catalyst poisoning or deposits and ensure expected NOx reduction performance.

Producers, distributors and logistics providers of AUS 32: to guide production, handling, storage and quality control across the supply chain.

Fleet operators and maintenance facilities: to verify purchased DEF quality, avoid SCR system faults and maintain emissions compliance.

Testing laboratories: to perform referee testing per ISO 22241-2 and report against ISO 22241-1 limits.

Related standards

ISO 22241-2:2019 - Test methods for AUS 32 (referee methods and precision).

ISO 22241-3 - Handling, transportation and storage of AUS 32.

Other referenced standards include ISO 3696 (water quality) and ISO 4259 (precision of measurement methods).

Keywords: ISO 22241-1, AUS 32, DEF, aqueous urea solution, SCR converter, NOx reduction, urea content, refractive index, biuret, aldehydes, trace metals, diesel emissions.

ISO 22241-1:2019

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 22241-2:2019

Diesel engines — NOx reduction agent AUS 32 — Part 2: Test methods

ISO 22241-1:2006

Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements

BS ISO 22241-2:2019

Diesel engines. NOx reduction agent AUS 32. Test methods.

ISO 22241-3:2017

Diesel engines — NOx reduction agent AUS 32 — Part 3: Handling, transportation, and storage

ISO 3696:1987

Water for analytical laboratory use — Specification and test methods

BS EN ISO 4259-3:2020

Petroleum and related products. Precision of measurement methods and results. Monitoring and verification of…