ASTM D7961-22
Standard Practice for Calibrating U-tube Density Cells over Large Ranges of Temperature and Pressure

Standard No.

ASTM D7961-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7961-22

Scope

1.1 This practice outlines procedures for the calibration of U-tube density cells. It is applicable to instruments capable of determining fluid density at temperatures in the range –10 °C to 200 °C and pressures from just greater than the saturation pressure to 140 MPa. The practice refers to density cells as they are utilized to make measurements of fluids primarily in the compressed-liquid state. Examples of substances for which the density can be determined with a calibrated U-tube density meter include: crude oils, gasoline and gasoline-oxygenate blends, diesel and jet fuels, hydraulic fluids, and lubricating oils. 1.2 This practice specifies a procedure for the determination of the expanded uncertainty of the density measurement. 1.3 This practice pertains to fluids with viscosities < 1 Pa·s (1000 centipoise) at ambient conditions. 1.4 4 The values listed in SI units are regarded as the standard, unless otherwise stated. The SI unit for mass density is kilograms per cubic metre (kg·m-3 ) and can be given as grams per cubic centimetre (g·cm-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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D7961-22 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
• ASTM D5002 Standard Test Method for Density and Relative Density of Crude Oils by Digital Density Analyzer
• ASTM D6792 Standard Practice for Quality Management Systems in Petroleum Products, Liquid Fuels, and Lubricants Testing Laboratories*， 2023-11-01 Update
• ASTM D7483 Standard Test Method for Determination of Dynamic Viscosity and Derived Kinematic Viscosity of Liquids by Oscillating Piston Viscometer
• ASTM D7578 Standard Guide for Calibration Requirements for Elemental Analysis of Petroleum Products and Lubricants
• ASTM D7740 Standard Practice for Optimization, Calibration, and Validation of Atomic Absorption Spectrometry for Metal Analysis of Petroleum Products and Lubricants

ASTM D7961-22 history

• 2022 ASTM D7961-22 Standard Practice for Calibrating U-tube Density Cells over Large Ranges of Temperature and Pressure
• 2017 ASTM D7961-17 Standard Practice for Calibrating U-tube Density Cells over Large Ranges of Temperature and Pressure
• 2015 ASTM D7961-15 Standard Practice for Calibrating U-tube Density Cells over Large Ranges of Temperature and Pressure