ASTM D2161 Practice for Conversion of Kinematic Viscosity
ASTM D2161 Standard Practice for Conversion of Kinematic Viscosity ot Saybolt Universal Viscosity or to Saybolt Furol Viscosity
3. Summary of Practice
3.1 The Saybolt Universal viscosity equivalent to a given kinematic viscosity varies with the temperature at which the determination is made. The basic conversion values are those given in Table 1 for 100°F. The Saybolt Universal viscosity equivalent to a given kinematic viscosity at any temperature may be calculated as described in 4.3. Equivalent values at 210°F are given in Table 1 for convenience.
3.2 The Saybolt Furol viscosity equivalents are tabulated in Table 3 for temperatures of 122°F and 210°F only.
3.3 Examples for using the tables are given in Appenix X1.
4. Significance and Use
4.1 At one time the petroleum industry relied on measuring kinematic viscosity by means of the Saybolt viscometer, and expressing kinematic viscosity in units of Saybolt Universal, Seconds (SUS) and Saybolt Furol, Seconds (SFS). This practice is now obsolete in the petroleum industry.
4.2 This practice establishes the official equations relating SUS and SFS to the SI kinematic viscosity units, mm2/s.
4.3 This practice allows for the conversion between SUS and SFS units and SI units of kinematic viscosity.
