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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PAC-Lab Instruments-ASTM D
Continue drying until the display exhibits a steady reading. Leave the syringe in place and plug the exit port. This test method applies to crude oils with s5002 vapor pressures provided appropriate precautions are taken to prevent vapor loss during transfer of the sample to the density analyzer. The sample must appear to be homogeneous. If the instrument has been calibrated to display the relative density, adjust the reading to the value 1.
Individual reprints single or multiple copies of this standard may be e5002 by contacting ASTM at the above address or at phonefaxor service astm. Calibrate the instrument at the same temperature at which the density of the sample is to be measured.
NOTE 4—When viscous liquids are being measured, a stable reading can be achieved even when air or gas bubbles are present. Work Item s – proposed revisions of this standard. In calibrating the thermometer, the ice point and bore corrections should be estimated to the nearest 0.
Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample. 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 matrix for this bias study was comprised of 15 participants, each analyzing four reference oils with certi? Careful injection of fresh sample will often eliminate bubbles. A number in parentheses indicates the year of last reapproval. 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.
Historical Version s – view previous versions of standard. The setting selected by this method could have the effect of altering the fourth place of the reading obtained for a sample. The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. Preparation of Apparatus 9. The test specimen is obtained as follows: Astj comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
The water must be free of astn the smallest air or gas bubbles. Link to Active This link will always route to the current Active version of the standard. Other calibrating materials such as n-nonane, n-tridecane, cyclohexane, and n-hexadecane for high temperature applications can also be used wstm appropriate. Reagents and Materials 7. Lighter crude oil can require special handling to prevent vapor losses.
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 These checks and any subsequent adjustments to Constants A and B can be made if required, without repeating the calculation procedure.
Precise setting and control of the test temperature in the sample tube is extremely wstm.
If stable values are not observed after a few minutes, then repeat the injection of a new sample into the tube. Unless otherwise indicated it is intended that all reagents shall conform to the speci? 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 severe burns. Chromic acid solution is the most effective cleaning agent; however, surfactant-type cleaning? When these conditions exist in the laboratory, pass the air used for calibration through a suitable puri?
Make sure that there is no obvious presence of bubbles trapped in the U-tube, and that it is? If the display does not exhibit the correct T-value or density for air ashm 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. For additional information, consult the Journal of Physical Chemistry, Vol 84,pp.
ASTM D5002 – 16
The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. Contaminated or humid air can affect the calibration.
The instrument shall be capable of meeting the precision requirements described in Test Method D 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. 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. Originally approved in Calibration of Apparatus 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.
Specific warning statements are given in 7. Mixing is required to obtain a sstm sample d502 analysis. In cases where saline components can be deposited in the cell,? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Record the T-value for air. 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