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API MPMS 9.1 Document Information:
Title
Manual of Petroleum Measurement Standards Chapter 9 - Density Determination Section 1 - Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
American Petroleum Institute
Publication Date:
Dec 1, 2002
Scope:
This test method covers the laboratory determination using a glass
hydrometer, of the density,
relative density (specific gravity), 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.
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 measurements.
Values determined as density, relative density, or API gravity can be
converted to equivalent
values in the other units at alternate reference temperatures by means
of the Petroleum Measurement
Tables.
Annex A1 contains a procedure for verifying or certifying the
equipment for this test method.
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:
- API gravity
- crude petroleum
- density
- hydrometer
- Petroleum Measurement Tables
- petroleum products
- relative density
- specific gravity
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