A number in parentheses indicates the year of last reapproval. This test method applies to crude oils with high vaporpressures provided appropriate precautions are taken to preventvapor loss during transfer of the sample to the density analyzer. Lightercrude oil can require special handling to prevent vapor losses. Heavier crudes can require measurements at higher tempera-tures to eliminate air bubbles in the sample. No other units of measurement are included in thisstandard.
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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Scope 1. This test method applies to crude oils with high vapor pressures provided appropriate precautions are taken to prevent vapor loss during transfer of the sample to the density analyzer. Lighter crude oil can require special handling to prevent vapor losses. Heavier crudes can require measurements at higher tempera- tures to eliminate air bubbles in the sample.
It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. Referenced Documents 2. OD on Physical Methods. Current edition approved Nov. Published December Originally published as D — Last previous edition D — Terminology 3.
Summary of Test Method 4. Apparatus 6. The analyzer must accommodate the accurate measurement of the sample temperature during measurement or must control the sample temperature as described in 6. The instrument shall be capable of meeting the precision requirements de- scribed in Test Method D Temperature control can be maintained as part of the density analyzer instrument package. The test specimen is obtained as follows: alternative means of introducing the sample into the density 8.
The mixing may be accomplished Thermometer, calibrated and graduated to 0. In calibrating the thermometer, the ice point and bore corrections should be estimated to the nearest 0. Precise setting and control of the test temperature in the sample tube is extremely important. An error of 0. Mixing at room temperature in an open container can result in the loss of light ends, so mixing in closed, pressurized containers or at sub-ambient temperatures is recommended.
Sampling, Test Specimens, and Test Units 8. The laboratory test container and sample volume shall be of sufficient dimensions to allow mixing as described in 8. Mixing is required to obtain a homogeneous sample for analysis. Pharmacopeial Convention, Inc. Preparation of Apparatus 9. Adjust the bath or internal temperature control so that the desired test tempera- ture is established and maintained in the sample compartment of the analyzer. Calibrate the instrument at the same tempera- ture at which the density of the sample is to be measured.
Calibration of Apparatus Thereafter, conduct calibration checks at least weekly during routine operation or more frequently as may be dictated by the nature of the crude oils being measured, see Other calibrating materials such as n-nonane, n-tridecane, cyclohex- ane, and n-hexadecane for high temperature applications can also be used as appropriate. Continue drying until the display exhibits a steady reading. Contaminated or humid air can affect the calibration. In addition, the inlet and outlet ports for the U-tube must be plugged during measurement of the calibration air to prevent ingress of moist air.
ASTM D4052 – Petroleum testing and Auto Sampler
Trouble viewing this video? Click Here. No operator judgment involved in making decisions whether a test passed or failed. Select your sample rack from the main screen, Input your sample name or ID. Once your sample has been measured, the system is rinsed and dried to prepare for the next sample.
Определение плотности на цифровом денсиметре ASTM D4052, IP 365,ISO EN 12185, ASTM D5002
D5002 Density and Relative Density of Crude Oils by Digital Density Analyzer