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.
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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 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 aztm variations of the order of 61 to 2 units in the last signi?
ASTM D5002 – 16
Although this condition can be compensated for by adjusting A and B, as described below, it is good practice to clean the tube with warm chromic acid solution Warning—Causes 5d002 burns. Individual reprints single or multiple asm of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The sample tube shall be completely full. Use the procedure in NOTE 4—When viscous liquids are being measured, a stable reading can be achieved even when air or gas bubbles are present.
The water must be free of even the smallest ast or gas bubbles. An error of 0. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Work Item s – proposed revisions of this standard.
Lighter crude oil can require special handling to prevent vapor losses. Chromic acid solution is the most effective cleaning agent; however, surfactant-type cleaning? Precise setting and control of the test temperature in the sample tube asgm extremely important.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Specific warning statements are given in 7. Make sure that there is no obvious asstm of bubbles trapped in the U-tube, and that it is? 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.
The instrument shall be capable of meeting the precision requirements described in Test Method D Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample. These checks and any subsequent adjustments to Constants A and B can be made if required, without repeating the calculation procedure.
PAC-Lab Instruments-ASTM D
Lighter crude oil can require special handling to prevent vapor losses. Preparation of Apparatus 9.
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. No other units of measurement are included in this standard.
Continue drying until the display exhibits a steady reading. No other units of measurement are included in this standard. 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 the last decimal place. The presence of bubbles can often be detected, however, by observing the?
Originally approved in Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: The setting chosen would then be dependent upon whether it was approached from a higher or lower asmt. The analyzer must accommodate the accurate measurement of the 1 This dd5002 method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D The test specimen is obtained as follows: A number in parentheses indicates the year of last reapproval.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. When these conditions exist in the laboratory, pass the air used for calibration through a suitable puri? Careful injection of fresh sample will often eliminate bubbles.
d0502 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.
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.
Alternatively, use the T and d values for the other reference liquid if one is used. Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample. Leave the syringe c5002 place and plug the exit port. If the instrument has been calibrated to display the relative density, ast, the reading to the value 1. If the display does not exhibit the correct T-value or density for air at the temperature of test, repeat the cleaning procedure or adjust the value of Constant B commencing with the last decimal place until the correct density is displayed.
Unless otherwise indicated wstm is intended that all reagents shall conform to the speci?
Precision and Bias 5,6 In cases where saline components can be deposited in the cell,? Contaminated or humid air can affect the calibration. A5 [Tw2 2 2