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ASTM-D5481:2004 Edition

ASTM-D5481:2004 Edition

$40.63

D5481-04 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 2004 5
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ASTM D5481-04

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 x 106 s-1). 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 75.100 (Lubricants, industrial oils and related products)

DOI: 10.1520/D5481-04

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Test Method
Significance and Use
Apparatus
Reagents and Materials
3 Sampling
Calibration and Standardization
Procedure
TABLE 1
TABLE 2
4 Calculation of Results
Report
Precision and Bias
Keywords
A1. CALCULATION OF EQUATION COEFFICIENTS
A1.1
A1.2
A1.3
A1.4
5 A2. DETERMINATION OF TUBE VOLUME
A2.1
A2.2
A2.3
A2.4
A2.5
A2.6
A2.7
A2.8
A2.9
A2.10
A2.11

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