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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
10. Procedure10.1 Lower the mercury level from the collection flask.10.2 Evacuate the system of collection flask and degassing flask to an absolute pressure of 13 10/-3 torr (130 mPa) or less. (In Fig.1, the space above the mercury in the reservoir must also be evacuated.)10.3 Connect the oil sample ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
METHOD A - VACUUM EXTRACTION8. Method A - Vacuum Extraction8.1 Method A employs vacuum extraction to separate the gases from the oil. The evolved gases are compressed to atmospheric pressure and the total volume measured. The gases are then analyzed by gas chromatography.9. Preparation of Apparatus9.1 ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
7. Sampling7.1 Obtain samples in accordance with the procedure described in Test Methods D 3613 for sampling with syringetype devices or rigid metal cylinders. The use of rigid metal cylinders is not recommended for use with Method B.7.2 The procurement of representative samples without loss of dissolved ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
6. Apparatus6.1 Apparatus of the type shown in Fig.1 or Fig.2 is suitable for use with up to 50-mL samples of oil and consists of the following components:NOTE 2 - This sample size has been found to be sufficient for most oils. However, oil that has had only limited exposure to air may contain much smaller ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
4. Summary of Test Method4.1 Method A - Dissolved gases are extracted from a sample of oil by introduction of the oil sample into a pre-evacuated known volume. The evolved gases are compressed to atmospheric pressure and the total volume measured.4.2 Method B - Dissolved gases are extracted from a sample ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 gas content of oil by volume - in Method A, the total volume of gases, corrected to 760 torr (101.325 kPa) and 0°C, contained in a given volume of oil, expressed as a percentage.In Methods B and C, the sum of the individual gas concentrations ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
1. Scope1.1 This test method covers three procedures for extraction and measurement of gases dissolved in electrical insulating oil having a viscosity of 20 cSt (100 SUS) or less at 40°C (104°F), and the identification and determination of the individual component gases extracted. Other methods have ...
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ASTM D95 method for water in petroleum products by distillation
11. Calculation11.1 Calculate the water in the sample, as weight or volume percent, in accordance with the basis on which the sample was taken, as follows: 12. Report12.1 Report the results as the water content to the nearest 0.05% if the 2-mL receiver has been used and to the nearest 0.1% if the 10-mL ...
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ASTM D95 method for water in petroleum products by distillation
10. ProcedureNOTE 4 - The precision of this test method will be affected by water droplets adhering to surfaces in the apparatus and therefore not settling into the water trap to be measured. To minimize the problem, all apparatus must be cleaned chemically at least daily to remove surface films and ...
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ASTM D95 method for water in petroleum products by distillation
8. Sampling8.1 Sampling is defined as all steps required to obtain an aliquot of the contents of any pipe, tank, or other system and to place the sample into the laboratory test container. Only representative samples obtained as specified in Practices D4057 (API MPMS Chapter 8.1) and D4177 (API MPMS ...
