ASTM-D5481:1996 Edition

$40.63

D5481-96 Standard Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary Viscometer

Published By	Publication Date	Number of Pages
ASTM	1996	5

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Category: ASTM

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Description

ASTM D5481-96

Historical Standard: Standard Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary Viscometer

ASTM D5481

Scope

1.1 This test method covers the laboratory determination of high-temperature high-shear (HTHS) viscosity of engine oils at a temperature of 150°C using a multicell capillary viscometer containing pressure, temperature, and timing instrumentation. The shear rate for this test method corresponds to an apparent shear rate at the wall of 1.4 million reciprocal seconds (1.4 10 ⁶ s¹). This shear rate has been found to decrease the discrepancy between this test method and other high-temperature high-shear test methods³ used for engine oil specifications. Viscosities are determined directly from calibrations that have been established with Newtonian oils with viscosities from 2 to 5 mPa·s at 150°C.

1.2 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.

Keywords

capillary method; shear testing-petroleum products; viscosity; viscosity-apparent

ICS Code

ICS Number Code n/a

DOI: 10.1520/D5481-96

Additional information

Standard Title	D5481-96 Standard Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary Viscometer
Published Code	ASTM
Publication Date	1996
Pages Count	5