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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The astj selected by this method could have the effect of altering the fourth place of the reading obtained for a sample. A number in parentheses indicates the year of last reapproval. These checks and any subsequent adjustments to Constants A and B can be made if required, without repeating the calculation procedure. 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. The sample asfm shall be completely full.
Use the procedure in The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Alternatively, use the T and d values for the other reference liquid if one is used.
Mixing is required to obtain a homogeneous sample for analysis. Turn the illumination light off immediately after inspection of the sample tube, since the heat generated affects the measurement temperature.
Chromic acid solution is the most effective cleaning agent; however, surfactant-type cleaning?
ASTM D5002 – 16
Continue drying until the display exhibits a steady reading. Contaminated or humid air can affect the calibration. Leave the syringe in place and plug the exit port. Careful injection of fresh sample will often eliminate bubbles.
Carry out all calculations to six signi? Adjust the bath or internal temperature control so that the desired test temperature is r5002 and maintained in the sample compartment of the analyzer. An error of 0.
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.
When these conditions exist in the laboratory, pass the air used for calibration through a suitable puri? The setting chosen would then be dependent upon whether it was approached from a higher or lower value. Unless otherwise indicated it is intended that all reagents shall conform to the speci? Allow the water to reach thermal equilibrium at the test temperature and record the T-value for water and the test temperature.
The laboratory test container and sample volume shall be of sufficient dimensions to allow mixing as described in 8. 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.
If stable values are not observed after a few minutes, then repeat the injection of a new sample into the tube. Users should, therefore, be aware that results obtained by this test method can be biased by as much as 0.
Lighter crude oil can require special handling to prevent vapor losses.
Calibration of Apparatus The presence of bubbles can often be detected, however, by observing the? 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 No other units of measurement are included in this standard. No other units of measurement are included in this standard. 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.
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.
PAC-Lab Instruments-ASTM D
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The instrument shall be capable of meeting the precision requirements described in Test Method D In calibrating the thermometer, the ice point and bore corrections should be estimated to the nearest 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. Last previous edition approved in as D—99 Specific warning statements are given in 7. If the instrument has been calibrated to display the relative density, adjust the reading to the value 1. 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.
Work Item s – proposed revisions of this standard. Heavier crudes can require measurements at higher temperatures to eliminate air bubbles in the sample. Lighter crude oil can require special handling to prevent vapor losses.
Summary of Test Method 4. Calibrate the instrument at the same temperature at which the density of the sample is to be measured. A5 [Tw2 2 2 The water must be free of even the smallest air or gas bubbles.
Preparation of Apparatus 9. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The test specimen is obtained as follows: 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.