ASTM D4052-2018 pdf free download

ASTM D4052-2018 pdf free download.Standard Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
1. Scope
1.1 This test method covers the determination ofthe density, relative density, and API Gravity of petroleum distillates and viscous oils that can be handled in a normal fashion as liquids at the temperature of test, utilizing either manual or automated sample injection equipment. Its application is restricted to liquids with total vapor pressures (see Test Method D5191) typically below 100 kPa and viscosities (see Test Method D445 or D7042) typically below about 15 000 mm 2 /s at the tempera- ture of test. The total vapor pressure limitation however can be extended to >100 kPa provided that it is first ascertained that no bubbles form in the U-shaped, oscillating tube, which can affect the density determination. Some examples of products that may be tested by this procedure include: gasoline and gasoline-oxygenate blends, diesel, jet, basestocks, waxes, and lubricating oils. 1.1.1 Waxes and highly viscous samples were not included in the 1999 interlaboratory study (ILS) sample set that was used to determine the current precision statements of the method, since all samples evaluated at the time were analyzed at a test temperature of15 °C. Wax and highly viscous samples require a temperature cell operated at elevated temperatures necessary to ensure a liquid test specimen is introduced for analysis. Consult instrument manufacturer instructions for appropriate guidance and precautions when attempting to analyze wax or highly viscous samples. Refer to the Precision and Bias section of the method and Note 9 for more detailed information about the 1999 ILS that was conducted. 1.2 In cases of dispute, the referee method is the one where samples are introduced manually as in 6.3 or 6.4, as appropri- ate for sample type. 1.3 When testing opaque samples, and when not using equipment that is capable of automatic bubble detection, proper procedure shall be established so that the absence of air bubbles in the sample cell can be established with certainty. For the determination of density in crude oil samples use Test Method D5002. 1.4 The values stated in SI units are regarded as the standard, unless stated otherwise. The accepted units of mea- sure for density are grams per millilitre (g/mL) or kilograms per cubic metre (kg/m 3 ). 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 appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. For specific warning statements, see 7.4, 7.5, and 10.3. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions: 3.1.1 density, n—mass per unit volume at a specified tem- perature. 3.1.2 relative density, n—the ratio of the density of a material at a stated temperature to the density of water at a stated temperature. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 adjustment, v—the operation of bringing the instru- ment to a state ofperformance suitable for its use, by setting or adjusting the density meter constants. 3.2.1.1 Discussion—On some digital density analyzer instruments, an adjustment may be made rather than calibrating the instrument. The adjustment procedure uses air and freshly boiled reagent water (Warning—Handling water at boiling or near boiling temperature can present a safety hazard. Wear appropriate personal protective equipment.) as standards to establish the linearity of measurements over a range of operating temperatures. 3.2.2 calibration, v—set of operations that establishes the relationship between the reference density of standards and the corresponding density reading of the instrument.