ISO 22241-1:2019/Amd 1:2019

Overview

ISO 22241-1:2019/Amd 1:2019 is an important amendment to the international standard governing the quality requirements for AUS 32, a Diesel engine NOx reduction agent. AUS 32, commonly known as Diesel Exhaust Fluid (DEF), plays a critical role in reducing nitrogen oxide emissions from diesel engines, supporting compliance with stringent environmental regulations. This amendment ensures the continued relevance and accuracy of quality specifications essential for manufacturing and using AUS 32 in emission control systems.

Developed by the ISO Technical Committee ISO/TC 22, Subcommittee SC 34, this amendment refines definitions and quality parameters to enhance the performance and safety of AUS 32 in diesel engine applications globally. As an international standard, it aims to harmonize global manufacturing standards, ensuring compatibility and effectiveness in reducing NOx pollution from diesel vehicles.

Key Topics

• Quality Requirements Update
  The amendment updates specific definitions related to water quality used in AUS 32 production, aligning with ISO 3696 water grade 3 specifications to ensure purity and performance consistency.

• Optical Property Definition
  It refines the definition related to the refractive index of AUS 32, clarifying the measurement conditions to maintain accuracy in quality control processes.

• Material Purity and Safety
  Emphasizes stringent purity requirements crucial for preventing damage to Selective Catalytic Reduction (SCR) systems in diesel engines, thereby extending engine life and reducing harmful emissions.

• Conformity and Compliance
  Reinforces the framework for international conformity assessment, enabling manufacturers and users to verify compliance with environmental regulations using a globally recognized standard.

• Patent Rights and Usage
  Highlights awareness of possible patent rights related to the document’s content, ensuring legal and compliant implementation.

Applications

• Emission Control Systems
  ISO 22241-1:2019/Amd 1 is vital for manufacturers of AUS 32 used in SCR systems for heavy-duty and light-duty diesel engines, ensuring the fluid meets the required quality standards to effectively reduce NOx emissions.

• Diesel Engine Manufacturing
  Engine builders and automotive OEMs rely on this standard to verify the compatibility and reliability of DEF fluids in reducing emissions without compromising engine performance.

• Environmental Compliance
  Regulatory authorities and testing laboratories use this standard as a reference point for assessing compliance with emission limits specified by environmental laws worldwide.

• Aftermarket and Supply Chain
  Suppliers and distributors of AUS 32 products utilize the amended quality requirements to ensure product integrity throughout the supply chain, from production to end-user delivery.

• Quality Assurance Programs
  Quality control teams in chemical plants producing AUS 32 integrate the standard’s parameters to maintain consistent product quality and meet customer expectations.

Related Standards

• ISO 22241 Series
  The amendment pertains to Part 1 of the ISO 22241 series, which collectively covers specifications, test methods, handling, and storage of AUS 32. Additional parts provide extended guidance on test procedures and operational practices.

• ISO 3696 – Water Quality
  Referenced for water purity grades essential in producing AUS 32, ensuring that contamination levels remain within acceptable limits for DEF fluid quality.

• ISO/IEC Directives
  Govern the processes used in developing, updating, and maintaining ISO standards, ensuring uniformity and transparency in standardization.

• Environmental Emission Standards
  National and international vehicle emission regulations that mandate NOx reduction, such as Euro 6 and EPA Tier 4, are directly supported by quality requirements outlined in ISO 22241-1.

ISO 22241-1:2019/Amd 1:2019 reflects the evolving requirements for AUS 32 quality critical to advancing emission reduction technologies in diesel engines. Understanding and applying this standard helps manufacturers, suppliers, and regulators maintain high environmental performance, engine longevity, and regulatory compliance in the global transportation sector.