D445-24 – Standard Test Method Technical Guide

ASTM D445-24 establishes a precise method for determining the kinematic viscosity of liquid petroleum products, whether transparent or opaque. The procedure measures the time for a liquid volume to flow under gravity through a calibrated glass capillary viscometer. Dynamic viscosity is then calculated from the kinematic viscosity and density, providing critical data for product specification and quality control.

🔬 Scope and Applicability

This test method covers the determination of kinematic viscosity for liquids with Newtonian flow behavior, where shear stress is proportional to shear rate. It is applicable over an extensive range of 0.2 mm²/s to 300,000 mm²/s