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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Make sure that there is no obvious presence of bubbles trapped in the U-tube, and that it is? The test specimen is obtained as follows: The d5002 chosen would then be dependent upon whether it was approached from a higher or lower value.
Historical Version s – view previous versions of standard. The last approved version of this historical standard is referenced on www. NOTE 2—The need for a d55002 in calibration is generally attributable to deposits in the sample tube that are not removed by the routine? The accepted units of measurement of density are grams per millilitre and kilograms per cubic ast.
The astn of bubbles can often be detected, however, by observing the? Precision and Bias 5,6 Continue drying until the display exhibits a steady reading. 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 atm density analyzer. 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.
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.
ASTM D5002 – 16
Mixing is required to obtain a homogeneous sample for analysis. Leave the syringe in place and plug the exit port. 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?
Atsm Item s – proposed revisions of this standard. Alternatively, use the C5002 and d values for the other reference liquid if one is used. Precise setting and control of the test temperature in the sample tube is extremely important. Sampling, Test Specimens, and Test Units 8.
Contaminated or humid air can affect the calibration. Mixing at room temperature in an open container can result in the loss of light d50022, so mixing in closed, pressurized containers or at sub-ambient temperatures is recommended.
A5 [Tw2 2 2 Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The water must be free of even the smallest air or gas bubbles. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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 Reagents and Materials 7.
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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? If the instrument has been calibrated to asstm the relative density, adjust the reading to the value 1.
PAC-Lab Instruments-ASTM D
Last previous edition approved in as D—99 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Lighter crude oil can require special handling to prevent vapor losses. Other calibrating materials such as n-nonane, n-tridecane, cyclohexane, and n-hexadecane for high temperature applications can also be used as appropriate.
In calibrating the thermometer, the ice point and bore corrections should be estimated to the nearest 0. Users should, therefore, be aware that results obtained by this test method can be biased by as much as 0.
Use the procedure in Carry out all calculations to six signi? Allow the water to reach thermal equilibrium at the test temperature and record the T-value for water and the test temperature.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Calibration of Apparatus Current edition approved Sept. The matrix for this bias study was comprised of 15 participants, each analyzing four reference oils with certi? Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample.
When these conditions exist in the laboratory, pass the air used for calibration through a suitable puri?