Standard Method of Test for
Density Relative Density (Specific Gravity) or API Gravity of Crude Petroleum and
Liquid Petroleum Products by Hydrometer Method
AASHTO Designation: T 227-02 (2006}
ASTM Designation: D 1298-99 (2005) except for the following provision:
1.Insert a note after Section 5.2 containing the following:
Note: This method may be used for the determination of the specific gravity of tars by use of an additional appropriate hydrometer.
I.I This test method covers the laboratory determination using a glass hydrometer, of the density, relative density (specificgravity), or API gravity of crude
petroleum,petroleum products, or mixtures of petroleum and nonpetroleum products normally handled as liquids, and having a Reid vapor pressure of 101.325 kPa
(14.696 psi) or less.
1.2 Values are measured on a hydrometer at either the reference temperature or at another convenient temperature, and readings corrected to the reference
temperature by means of the Petroleum Measurement Tables; values obtained at other than the reference temperature being hydrometer readings and not density
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