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ASTM-D7157:2005 Edition

ASTM-D7157:2005 Edition

$40.63

D7157-05 Standard Test Method for Determination of Intrinsic Stability of Asphaltene-Containing Residues, Heavy Fuel Oils, and Crude Oils (n-Heptane Phase Separation; Optical Detection)

Published By Publication Date Number of Pages
ASTM 2005 9
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1.1 This test method covers a procedure for quantifying the intrinsic stability of the asphaltenes in an oil by an automatic instrument using an optical device.

1.2 This test method is applicable to residual products from thermal and hydrocracking processes, to products typical of Specifications D 396 Grades No. 5L, 5H, and 6, and D 2880 Grades No. 3-GT and 4-GT, and to crude oils, providing these products contain 0.5 mass% or greater concentration of asphaltenes (see Test Method D 6560).

1.3 This test method quantifies asphaltene stability in terms of state of peptization of the asphaltenes (S-value), intrinsic stability of the oily medium (So) and the solvency requirements of the peptized asphaltenes (Sa).

1.4 The values stated in SI units are to be regarded as the standard.

1.5 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

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Test Method
Significance and Use
Interferences
Apparatus
3 Reagents and Materials
Sampling and Test Specimens
FIG. 1
4 Preparation of Apparatus
Quality Control Monitoring
Procedure
Calculation of Results
TABLE 1
5 Report
Precision and Bias
Keywords
FIG. 2
6 A1. HAZARDS INFORMATION
A1.1 Introduction
X1. DETAILED AUTOMATIC TEST PROGRAM
X1.1
X1.2
X1.3
X1.4
X1.5
7 FIG. X1.1
8 FIG. X1.2

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