ASTM D1665−98 Reapproved 2014 Standard Test Method for Engler Specific Viscosity of Tar Products

ASTM D1665−98 Reapproved 2014 Standard Test Method for Engler Specific Viscosity of Tar Products

Scope
1.1 This test method covers the determination of specific viscosity of tars and their fluid products. It does not determine absolute viscosity but is an empirical flow test. Only by conforming strictly to requirements of the test method are reproducible results obtained.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

ASTM D1665−98 Reapproved 2014 Standard Test Method for Engler Specific Viscosity of Tar Products

Summary of Test Method
4.1 The time, in s, is measured for a fixed volume of liquid material to flow through an efflux tube under an accurately reproducible head and at a closely controlled temperature. The Engler specific viscosity is then calculated by dividing the efflux time by the viscometer calibration factor as determined by making the same efflux measurement for water.