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ASTM D 7060 Document Information:
Title
Standard Test Method for Determination of the Maximum Flocculation Ratio and Peptizing Power in Residual and Heavy Fuel Oils (Optical Detection Method)
ASTM International
Publication Date:
May 1, 2005
Scope:
(Footnote *)
This test method covers a procedure for quantifying the maximum
flocculation ratio of the
asphaltenes in the oil and the peptizing power of the oil medium, by
an automatic instrument using
an optical device.
This test method is applicable to atmospheric or vacuum distillation
residues, thermally cracked
residue, intermediate and finished residual fuel oils, containing at
least 1 mass % asphaltenes.
This test method has not been developed for asphalts.
NOTE 1 - An optical probe detects the formation of flocculated
asphaltenes. The start of
flocculation is interpreted when a significant and sustained increase
in rate-of-change of signal,
as measured by the optical probe, ensures flocculation is in progress.
The start of flocculation
can be detected unambiguously when the sample contains at least 1 %
mass asphaltenes as measured by
Test Method D 6560.
NOTE 2 - This test method is applicable to products typical of
Specification D 396 - Grades 5L, 5H,
and 6, and Specification D 2880 - Grades 3-GT and 4-GT.
This test method was evaluated in a within-laboratory study in the
range of 16 to 57 for the
maximum flocculation ratio and in the ranges of 27 to 96 for peptizing
power.
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.
Footnote * - A Summary of Changes section appears at the end of this
standard.
Keywords:
- compatibility
- heavy fuel oil
- maximum flocculation ratio
- peptizing power
- P-ratio
- residual fuel oil
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