To ensure the quality of automotive grade urea, a testing report is required. The report includes various tests such as purity, density, viscosity, freezing point, and NOx reduction efficiency. It is important to note that only urea that meets the ISO standard 22241-1 can be classified as automotive grade urea. This process is known as Selective Catalytic Reduction (SCR), which has been proven to reduce NOx emissions by up to 90%.
TESTING REPORT PARAMETERS
| Test items | Unit | Technical requirement | Test resault |
| Urea content | % | 31.8-33.2 | 32.8 |
| Density | kg/m³ | 1087.0-1093.0 | 1091.0 |
| Refractive Index | 20nD | 1.3814-1.3843 | 1.3831 |
The quality leader is responsible for reviewing the test report and determining if the finished product meets the necessary standards. If it is deemed qualified, the designated personnel can proceed with their assigned tasks. However, if it is found to be unqualified, the quality leader will make the necessary adjustments and inform the appropriate personnel of the revised plan to proceed with the next steps.
TESTING STANDARD
On May 7, 2013, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standards Commission released the GB 29518-2013 standard, also known as the "National Standard for Automotive Urea". This standard, which came into effect on July 1, 2013, pertains to the use of urea aqueous solution (AUS32) as a reducing agent for nitrogen oxide emissions in diesel engines. AUS32 is a type of urea produced in industry that contains only small amounts of biuret, ammonia, and water, and does not contain aldehydes, anticaking agents, sulfur and sulfides, chlorides, nitrates, or other compounds.
CERTIFICATION
The LINGGUAN-produced urea solution for vehicles has successfully passed several market spot checks conducted by the national quality inspection department. It has also been tested by reputable third-party institutions, including the China Automotive Engineering Research Institute, and has obtained ISO certifications for quality management, environmental management, and occupational health and safety management (ISO: 9001, 14001, and 28001).
In summary, automotive grade urea is an ideal choice for your diesel exhaust system. With the strict emissions regulations in China and around the world, using high-quality urea is essential. By selecting a reputable supplier and ensuring that the urea meets industry standards, you can be confident in the performance and longevity of your diesel engine.
