Standard Test Method for Density and Relative Density of Engine Coolant Concentrates and Aqueous Engine Coolants by Digital Density Meter.
Get more information about the standard at ASTM D5931-20.
ASTM D5931 is a standard test method for determining the density and relative density of engine coolant concentrates and aqueous engine coolants using a digital density meter. Density is a fundamental physical property that, when used alongside other characteristics, helps in the comprehensive evaluation of engine coolants. Accurate density measurements are essential for converting observed volumes to standard reference temperatures, facilitating consistency in quality control and formulation processes.
Details
This test method is applicable to a variety of substances, including glycols, glycerin, heat transfer fluids, engine coolant concentrates and aqueous engine coolants. The procedure involves introducing a sample into a digital density meter, which measures the density based on the oscillation frequency of a U-tube containing the sample. The accepted units of measurement for density are grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).
The values obtained are crucial for converting measured volumes to standard temperatures, commonly 25 °C, 20 °C, or 15.6 °C, as specified in ASTM standards. This conversion ensures uniformity and comparability across different measurements and applications.
Industries and Applications
ASTM D5931 is significant in various industries and applications, including:
- Automotive Industry: Manufacturers and service providers utilize this method to ensure the quality and consistency of engine coolants, which is vital for optimal engine performance and longevity
- Chemical Manufacturing: Producers of glycols, glycerin, and heat transfer fluids apply this standard to maintain product specifications and quality control during production
- Quality Control Laboratories: Analytical labs employ this test method to verify the density of engine coolants and related fluids, ensuring they meet industry standards and client specifications
- Environmental Agencies: Regulatory bodies may reference this method to assess the properties of engine coolants in environmental impact studies and compliance evaluations
In summary, ASTM D5931 provides a standardized procedure for accurately determining the density and relative density of engine coolant concentrates and aqueous engine coolants using a digital density meter. Its application is crucial across multiple industries to ensure product quality, facilitate standardization, and support regulatory compliance.