ASTM D4807-05(R2020) pdf free download

ASTM D4807-05(R2020) pdf free download.Standard Test Method for Sediment in Crude Oil by Membrane Filtration
1. Scope
1.1 This test method covers the determination of sediment in crude oils by membrane filtration. This test method has been validated for crude oils with sediments up to approximately 0.15 % by mass. 1.2 The accepted unit of measure for this test method is mass %, but an equation to convert to volume % is provided (see Note 6). 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. For specific warning statements, see 6.1 and Annex A1. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Apparatus
5.1 Funnel and Filter Support Assembly—Use an assembly designed to hold 47 mm diameter filters as was used in the development of this test method (see Fig. 1). 5 5.1.1 Filter Funnel—Use a filter funnel with a 250 mL minimum capacity. The lower part of the funnel has a 40 mm inside diameter and is designed to secure the 47 mm diameter filter against the filter support. The funnel can be jacketed to facilitate heating the solvent funnel and sample during filtering. N OTE 1—Use of a glass funnel should minimize the effect of static electricity when filtering. 5.1.2 Filter Support—Use a support base for the filter that has a porous scintered glass center section about 40 mm to 43 mm in diameter. The support base is designed to fit securely against the funnel holding the filter in place over the porous section. The filter support’s stem should be long enough to extend down into the filter flask such that the end is below the vacuum connection. 5.1.3 Clamp Assembly—Use a spring or screw type clamp to secure the funnel to the filter support. The clamp should be tight enough to prevent the solvent from leaking through at the junction between the glass and filter membrane. The exterior dimensions of the funnel and support are designed to facilitate clamping the two pieces together. 5.1.4 Rubber Stopper—Use a single-hole, capable of hold- ing the lower stem of the filter support securely onto the filtering flask. 5.1.5 Vacuum Filtering Flask—Use a 500 mL or larger vacuum filtering flask. 5.2 Membrane Filter—Use a nylon membrane filter, 47 mm in diameter with 0.45 µm pore size. 6 5.3 Oven—Use an oven capable of maintaining a tempera- ture of 105 °C 6 2 °C (220 °F 6 4 °F). 5.4 Vacuum Pump—Use a vacuum pump capable of reduc- ing and maintaining the pressure at −80 kPa (−24 in. Hg) during the filtering.5.5 Analytical Balance—Use an analytical balance capable of measuring to the nearest 0.0001 g. Verify the balance, at least annually, against weights traceable to a national metrol- ogy institute such as the National Institute of Standards and Technology (NIST). 5.6 Heating Coil for Filter Assembly—Use copper tubing (3.175 mm or 1 ⁄ 8 in. diameter) wound around the funnel on the filter apparatus and connected to a circulating bath to maintain the oil in the funnel at 90 °C 6 2 °C (see Fig. 1). Alternative methods of heating the funnel such as heating tape or glass thermal jacket could also be used. 5.7 Mixer—Use a nonaerating, high-speed mixer meeting the verification efficiency requirements specified in Practice D5854 (API MPMS Chapter 8.3). Either insertion mixers or circulating mixers are acceptable provided they meet the criteria in Practice D5854 (API MPMS Chapter 8.3). 5.8 Cooling Vessel—Use a desiccator or other type oftightly covered vessel for cooling the membrane filter before weigh- ing. The use of a desiccant/drying agent is not recommended. 5.9 Ground/Bond Wire—Use a 0.912 mm to 2.59 mm (No. 10 through No. 19) bare stranded flexible, stainless steel or copper wire installed in the flask through the vacuum connec- tion and connected to ground.