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ASTM D482 test method for ash from petroleum products
12. Precision and Bias12.1 The precision of this test method as obtained by statistical examination of interlaboratory test results is as follows:12.1.1 Repeatability - The difference between successive tests results, obtained by the same operator with the same apparatus under constant operating conditions ...
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ASTM D482 test method for ash from petroleum products
9. Calculation9.1 Calculate the mass of the ash as a percentage of the original samples as follows:10. Report10.1 Report the results as follows:10.2 Record the value reported as ash in accordance with Test Method D482, stating the mass of the sample taken.11. Quality Control11.1 Confirm the performance ...
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ASTM D482 test method for ash from petroleum products
8. Procedure8.1 Heat the evaporating dish or crucible that is to be used fo the test at 700 to 800°C for a minimum of 10min. Cool to room temperature in a suitable container, and weigh to the nearest 0.1mg.NOTE 3 - The container in which the dish or crucible is cooled can be a desiccator not containing ...
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ASTM D482 test method for ash from petroleum products
4. Significance and Use4.1 Knowledge of the amount of ash-forming material present in a product can provide information as to whether or not the product is suitable for use in a given application. Ash can result from oil or water-soluble metallic compounds or from extraneous solids such as dirt and rust.5. ...
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ASTM D482 test method for ash from petroleum products
1. Scope1.1 This test method covers the determination of ash in the range 0.001–0.180 mass %, from distillate and residual fuels, gas turbine fuels, crude oils, lubricating oils, waxes, and other petroleum products, in which any ash-forming materials present are normally considered to be undesirable ...
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Precision and bias of gas ratios used in fault diagnosis in oil-insulated electr
Hydrogen and low molecular weight hydrocarbons are formed in the decomposition of the much larger hydrocarbon molecules that make up an insulating oil. The numerical values of ratios of these decomposition products are used in the diagnosis of the type of electrical or thermal fault leading to their ...
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Preparation of large quantities of gas-in-oil standards
A2.1 ApparatusA2.1.1 Oil Vessel (Fig.A2.1(a)), 5-L equipped with one sidearm septum holder, two sidearm outlets, one egg-shaped TFE-fluorocarbon-coated stirring bar, a cork ring to support the vessel, and a magnetic stirrer.A2.1.2 Oil-Degassing System (Fig.A2.1(b)), consisting of one 4-L oil reservoir, ...
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Preparation of small quantities of gas-in-oil standards
A1.1 Calibration ApparatusA1.1.1 Syringes, fixed needle gas-tight, of suitable size, and a rubber slip-on septum.A1.1.2 Vacuum Pumping System, capable of evacuating the glassware to an absolute pressure of 1 x 10(-3) torr (130 mPa) or lower.A1.1.3 Erlenmeyer Vacuum Flask, 1-L with a glass inlet tube, ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
32. Calculation32.1 The initial concentration of the substance in oil, C, is determined using Eq 17 and the partition coefficients given in Table 6. For instance, the hydrogen peak gives an area of 4000 counts, which corresponds to 10 ppm in accordance with the calibration curve that has been plotted. ...
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ASTM D3612 for insulating oil dissolved gas analysis by gas chromatography
31. Determination of Partition Coefficients31.1 The partition coefficients for the different gases being considered are listed in Table 6 at the analytical temperature of 70°C. They were established in the naphthenic Voltesso 35 oil with 12 % of aromatic carbon content (Test Method D 2140) and a negative ...
