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ASTM D1831 method for roll stability of lubricating grease
10. Precision and Bias10.1 The precision of this test method is not known to have been obtained in accordance with currently accepted guidelines (for example in Committee D02 research report RR: D02 1007, "Manual on Determining Precision Data for ASTM Methods on Petroleum Products and Lubricants").10.2 ...
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ASTM D1831 method for roll stability of lubricating grease
6. Apparatus6.1 Roll Stability Test Apparatus, capable of rotating a steel cylinder and 5 more or less 0.05kg roller weight at a rolling speed of 165 more or less 15rpm. One such example of a suitable apparatus is shown in Fig.1.6.2 One-Quarter or One-Half Scale Cone and Shaft with Worker, as described ...
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ASTM D1831 method for roll stability of lubricating grease
4. Summary of Test Method4.1 The Test Methods D1403 cone penetration of an approximately 50g aliquot of lubricating grease is determined. The grease is then subjected to low shear at 20 to 35°C (68 to 95°F) for 2h more or less 5min in a standard roll stability apparatus, before the cone penetration ...
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ASTM D1831 method for roll stability of lubricating grease
1. Scope1.1 This test method covers determination of the changes in the consistency, as measured by cone penetration, of lubricating greases when worked in the roll stability test apparatus.1.2 The values stated in inch-pound units for the apparatus dimensions are to be regarded as standard; the SI conversions ...
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ASTM D3427 method for air release properties of petroleum oils
10. Calculation of Density10.1 Density: NOTE 13 - 10.2 Target Density: Initial density x 0.99810.3 If the tare key of the balance is pressed while the sinker is being weighed in air so that the reading is zeroed, then the following may be used:NOTE 14 - Some instruments automatically make the above ...
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ASTM D3427 method for air release properties of petroleum oils
9. Procedure9.1 Assemble the test apparatus as shown in Fig.1. Set the compressed air temperature to within 0.2°C of the desired test temperature. Set the circulating bath to give a specimen temperature within 0.1°C of the desired test temperature. The required bath temperature setting and time for ...
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ASTM D3427 method for air release properties of petroleum oils
7. Materials7.1 Purity of Reagents - Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society where such specifications are available. Other grades ...
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ASTM D3427 method for air release properties of petroleum oils
6. Apparatus6.1 A schematic diagram of the apparatus is shown in Fig.1.The component parts are described as follows:6.1.1 Test Vessel, made of borosilicate glass as shown in Fig.2, consisting of a jacketed sample tube fitted with an air inlet capillary, baffle plate, and air outlet tube. The two parts ...
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ASTM D3427 method for air release properties of petroleum oils
1. Scope1.1 This test method covers the ability of turbine, hydraulic, and gear oils to separate entrained air.NOTE 1 - This test method was developed for mineral based oils. It may be used for some synthetic fluids; however, thep recision statement applies only to petroleum oils.1.2 This standard does ...
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Description of colorimeter and associated apparatus
1. Colorimeter - Use an instrument that will illuminate and permit observation of the sample and any one of the color standards (or in the case of a three-field instrument, any two of the color standards) simultaneously, either by direct viewing or with an optical eyepiece.1.1.1 A two-field instrument ...
