The Applied Technical Services Family of Companies (ATS FoC) conducts ASTM D445-26 testing to determine the kinematic viscosity of transparent and opaque liquids. When density data is available, this method also allows calculation of dynamic viscosity.
ATS provides laboratory testing services for clients requiring viscosity data for product evaluation, quality assurance, research, and engineering. Our technical staff follow established procedures and use appropriate equipment to deliver consistent, reliable results.
How Can ASTM D445 Testing Support Quality Control?
ASTM D445 measures how long it takes for a liquid to flow through a calibrated glass capillary viscometer under gravity. The resulting measurement determines the liquid’s kinematic viscosity. Dynamic viscosity can be calculated using kinematic viscosity and density.
This standard applies to a broad range of liquid petroleum products and also applies to certain non-petroleum materials when the method is appropriate for the sample. ASTM D445 covers kinematic viscosities ranging from 0.2 to 300,000 mm²/s. This method is designed for liquids with Newtonian flow behavior. Sample characteristics may affect applicability and result interpretation, so testing requirements should reflect the material and intended use.
Why Is ASTM D445 Testing Important?
Viscosity determines how liquids flow, move through equipment, and perform in various applications. In lubricants, it impacts equipment operation and product suitability. For petroleum fuels, viscosity affects storage, handling, and operating conditions.
Accurate viscosity measurements enable manufacturers and engineers to assess products against specifications. Testing also supports product development, quality control, and material analysis. ASTM D445 testing helps our clients:
- Characterize liquid viscosity
- Evaluate petroleum-based products
- Support product specifications
- Compare material samples
- Monitor changes in product properties
- Investigate potential material differences
- Generate data for engineering evaluations
- Support research and development activities
What Industries Use ASTM D445 Testing?
ASTM D445 testing can serve organizations working with petroleum products, lubricants, fuels, and other applicable liquids. Typical users may include:
- Petroleum manufacturers and suppliers
- Lubricant manufacturers
- Fuel producers
- Chemical manufacturers
- Oil and gas companies
- Automotive manufacturers and suppliers
- Industrial equipment manufacturers
- Research and development organizations
- Quality assurance laboratories
- Engineering and materials teams
Testing may also be useful when a company needs independent laboratory data for a product or material evaluation.
ATS: Supporting Product and Quality Evaluations
ATS conducts ASTM D445 testing with a focus on technical consistency, thorough documentation, and reliable laboratory practices. Our professionals evaluate samples using procedures aligned with the applicable requirements of ASTM D445. The testing process controls key conditions and measures liquid flow through a calibrated capillary viscometer. Accurate sample handling and temperature control are essential, as viscosity is highly dependent on temperature.
We collaborate with clients to determine suitable testing parameters based on material and project goals. Our laboratory supports both routine testing and specialized engineering evaluations. ASTM D445 testing provides valuable viscosity data for product development and quality programs. These testing results help our clients determine if materials meet specifications or compare samples from various sources or production stages.
ASTM D445 is closely related to ISO 3104, which corresponds to an earlier edition of D445. Organizations should select the appropriate edition and method requirements for their project. ATS offers ASTM D445 testing for organizations seeking professional laboratory support and objective material data. Our expertise helps clients obtain viscosity measurements for engineering, manufacturing, quality, and research applications.
Contact Us
As the nation’s premier chemical analysis and testing provider, the proven experts at ATS have the experience, resources, and skills to ensure the highest levels of customer satisfaction and reliability. Get in touch with us today by submitting a web request form or calling +1 (888) 287-5227.

