NF EN ISO 3104, T60-100 (11/2023)

This document specifies a Procedure A using manual glass viscometers and a Procedure B using glass capillary viscometers in an automated assembly, for the determination of the kinematic viscosity, ?, of transparent and opaque products. The scope of application covers liquid petroleum products, fatty acid methyl esters (FAME), paraffinic gas oil, hydrotreated vegetable oil (HVO), gas-to-liquid (GTL) fuels and blends of diesel biofuels up to 50% FAME. Kinematic viscosity is determined by measuring the time a volume of liquid flows under gravity through a calibrated glass capillary viscometer. The dynamic viscosity, ?, is obtained by multiplying the measured kinematic viscosity by the density, ?, of the liquid. The range of kinematic viscosities covered in this test method is 0.2 mm2/s to 300,000 mm2/s over the temperature range –20°C to +150°C. NOTE The result obtained with this document depends on the behavior of the sample and is intended for application on liquids whose shear stresses and shear rates are proportional (Newtonian flow behavior). If, however, viscosity varies significantly with shear rate, different results may be obtained from viscometers with different capillary diameters. The procedure and precision values for residual fuels, which under certain conditions exhibit non-Newtonian behavior, have been included.
(Automatic translation from French)