NF T60-136-2004 《Petroleum products - Calculation of viscosity index from kinematic viscosity》 Related products

"NF T60-136-2004 Petroleum products, using kinematic viscosity to calculate the viscosity index" is a standard issued by the French Association for Standardization (AFNOR), which stipulates the method of calculating the viscosity index (VI) of petroleum products and related materials by kinematic viscosity at 40 ° C and 100 ° C. The standard is applicable to petroleum products such as lubricating oils and fuel oils, and provides two calculation modes: Method A is suitable for products with a viscosity index of less than or equal to 100, and Method B is suitable for products with a viscosity index greater than 100. The viscosity index is an important indicator to measure the viscosity of oil products with temperature changes. The high viscosity index indicates that the viscosity of oil products at different temperatures changes less and has better temperature adaptability. The standard provides a scientific basis for the quality control, performance evaluation and research and development of petroleum products.