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ASTM D7112-05

Historical Revision

Standard Test Method for Determining Stability and Compatibility of Heavy Fuel Oils and Crude Oils by Heavy Fuel Oil Stability Analyzer (Optical Detection)

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1.1 This test method covers an automated procedure involving titration and optical detection of precipitated asphaltenes for determining the stability and compatibility parameters of refinery residual streams, residual fuel oils, and crude oils. Stability in this context is the ability to maintain asphaltenes in a peptized or dissolved state and not undergo flocculation or precipitation. Similarly, compatibility relates to the property of mixing two or more oils without precipitation or flocculation of asphaltenes.

1.2 This test method is applicable to residual products from atmospheric and vacuum distillation, from thermal, catalytic, 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 0.05 mass % or greater concentration of asphaltenes.

1.3 This test method is not relevant to oils that contain less than 0.05 % asphaltenes, and would be pointless to apply to unstable oils that already contain flocculated asphaltenes.

1.4 The values stated in SI units shall be considered 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.


SDO ASTM: ASTM International
Document Number D7112
Publication Date April 1, 2005
Language en - English
Page Count 11
Revision Level 05
Supercedes
Committee D02.14
Publish Date Document Id Type View
Nov. 1, 2024 D7112-24 Revision
June 1, 2019 D7112-19 Revision
July 1, 2018 D7112-18 Revision
Nov. 1, 2012 D7112-12 Revision
Dec. 1, 2009 D7112-09 Revision
Nov. 1, 2005 D7112-05A Revision
April 1, 2005 D7112-05 Revision
Oct. 1, 2017 D7112-12R17 Reaffirmation