API Gravity – Petroleum – Digital Density Meter Application Note. API Gravity – Petroleum – Digital Density Meter Application Note. API Gravity – Density Meter. Buy ASTM D TEST METHOD FOR DENSITY AND RELATIVE DENSITY OF CRUDE OILS BY DIGITAL DENSITY ANALYZER from SAI Global. Purchase your copy of ASTM D – 16 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.
|Country:||Central African Republic|
|Published (Last):||26 June 2007|
|PDF File Size:||2.79 Mb|
|ePub File Size:||12.98 Mb|
|Price:||Free* [*Free Regsitration Required]|
If the instrument has been calibrated to display the density, adjust the reading to the correct value for water at the test temperature see Table 1 by changing the value of Constant A, commencing with d5020 last decimal place. Continue drying until the display exhibits a steady reading.
ASTM D5002 – 16
The setting chosen would then be dependent upon whether it was approached from a higher or lower value. When bubbles are absent and the sample is at equilibrium with the test temperature, the displayed values are stable, do not drift, and show only small variations of the order of 61 to 2 units in the last signi? Calibration of Apparatus The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample.
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: This standard is subject to revision at any time wstm the responsible technical committee and must be reviewed every?
NOTE 2—The need for a change in calibration is generally attributable to deposits in the sample tube that are not removed by the routine? These checks and any subsequent adjustments to Constants A and B asgm be made if required, without repeating the calculation procedure. NOTE 3—In applying this periodic calibration procedure, it has been found that more than one value each for A and B, differing in the fourth decimal place, will yield the correct reading for the density of air and water.
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.
Chromic acid solution is the most effective cleaning agent; however, surfactant-type cleaning? The sample tube shall be completely full.
The analyzer must accommodate the accurate measurement of the 1 This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D Precision and Bias 5,6 Specific warning statements are given in 7. Since bubbles contribute to lower density readings, an observed increase in the density of the liquid after injection of fresh sample tends to suggest that bubbles were previously present.
Carry out all calculations to six signi? Use the procedure in A number in parentheses indicates the year of last reapproval. Temperature control can be maintained as part of the density analyzer instrument package. If stable values are not observed after a few minutes, then repeat atsm injection of a new sample into the tube. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such d55002, are entirely their own responsibility.
Last previous edition approved 5d002 as D—99 Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Originally approved in Leave the syringe in place and plug the exit port.
An error of 0. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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. If the instrument has been calibrated to display the relative density, adjust the reading to the value 1.
PAC-Lab Instruments-ASTM D
Unless otherwise indicated it is intended that all reagents asttm conform to the speci? Although this condition can be compensated for atm adjusting A and B, as described below, it is good practice to clean the tube with warm chromic acid solution Warning—Causes severe burns.
Historical Version s – view previous versions of standard. Reagents and Materials 7. The laboratory test container and sample volume shall be of sufficient dimensions to allow mixing as described in 8.
Make sure that there is no obvious presence of bubbles trapped in the U-tube, and that it is? When these conditions exist in the laboratory, pass the air used for calibration through a suitable puri? Contaminated or humid air can affect the calibration.
The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. 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