ASTM D445 – STANDARD TEST METHOD FOR KINEMATIC VISCOSITY OF TRANSPARENT AND OPAQUE LIQUIDS (AND CALCULATION OF DYNAMIC VISCOSITY
Revision / Edition: 09 Chg: Date: 07/01/09 ASTM D445
This ASTM D445 test method specifies a procedure for the determination of the kinematic viscosity, Î½, of liquid petroleum products, both transparent and opaque, by measuring the time for a volume of liquid to flow under gravity through a calibrated glass capillary viscometer. ASTM D445, The dynamic viscosity, Î·, can be obtained by multiplying the kinematic viscosity, Î½, by the density, Ï, of the liquid.
NOTE 1 ”For the measurement of the kinematic viscosity and viscosity of bitumens, see also Test Methods ASTM D 2170 and ASTM D 2171.
NOTE 2 ”ISO 3104 corresponds to Test Method ASTM D445
The result obtained from this test method is dependent upon the behavior of the sample and is intended for application to liquids for which primarily the shear stress and shear rates are proportional (Newtonian flow behavior). ASTM D445, If, however, the viscosity varies significantly with the rate of shear, different results may be obtained from viscometers of different capillary diameters. The procedure and precision values for residual fuel oils, which under some conditions exhibit non-Newtonian behavior, have been included.
The range of kinematic viscosities covered by this test method is from 0.2 to 300 000 mm2/s (see Table A1.1) at all temperatures (see 6.3 and 6.4). The precision has only been determined for those materials, kinematic viscosity ranges and temperatures as shown in the footnotes to the precision section, ASTM D445.
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
This ASTM D445 standard does not purport to address all of the safety concerns, if any, associated with its use. ASTM D445, It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
A Summary of Changes section appears at the end of this ASTM D445 standard.