NF ISO 2909-2004 《Petroleum products - Calculation of viscosity index from kinematic viscosity.》 Related products

The standard NF ISO 2909:2004 Petroleum products, viscosity index calculated by kinematic viscosity specifies the method of calculating the viscosity index (VI) of petroleum products based on their kinematic viscosity value. The viscosity index is an important parameter for measuring the degree to which the viscosity of petroleum products changes under temperature changes and is often used to evaluate the flow performance of lubricating oils at different temperatures. The standard details the test procedures, data processing and calculation methods to calculate the viscosity index through the measurement of kinematic viscosity at different temperatures. This method is widely used in the petroleum industry, lubricant research and development, and quality control to help evaluate and optimize the performance of lubricants, ensuring their Stability and efficiency in various working environments.