ASTM D721-2017 Standard Test Method for Oil Content of Petroleum Waxes《石油蜡含油量的标准试验方法》.pdf
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1、Designation: D721 15D721 17Designation: 158/69(85)Standard Test Method forOil Content of Petroleum Waxes1This standard is issued under the fixed designation D721; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This test method covers the determinati
3、on of oil in petroleum waxes having a congealing point of 30 C (86 F) or higheras determined in accordance with Test Method D938, and containing not more than 15 % of oil.2NOTE 1With some types of waxes, of oil contents greater than 5 %, there may be an incompatibility with MEK resulting in the form
4、ation of twoliquid phases. If this occurs, the test method is not applicable to the material under test.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not
5、 considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to
6、use.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers t
7、o Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3D938 Test Method for Congealing Point of Petroleum Waxes, Including PetrolatumE1 Specification for ASTM Liquid-in-Glass ThermometersE128 Test Method for Maximum Pore Diameter and Permeability of Rigid Porous Filters for Laboratory Us
8、eE2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids2.2 Energy Institute Standards:Specification for IP Standard Thermometers43. Summary of Test Method3.1 The sample is dissolved in methyl ethyl ketone, the solution cooled to 32 C (25 F) to precipitate the wax
9、, and filtered.The oil content of the filtrate is determined by evaporating the methyl ethyl ketone and weighing the residue.4. Significance and Use4.1 The oil content of a wax may have significant effects on several of its properties, such as strength, hardness, flexibility, scuffresistance, coeffi
10、cient of friction, coefficient of expansion, melting point, and oil straining. The importance of these effects may bedependent upon the ultimate use of the wax.1 This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct resp
11、onsibility of SubcommitteeD02.10.0A on Physical/Chemical Properties.Current edition approved June 1, 2015May 1, 2017. Published June 2015June 2017. Originally approved in 1943. Last previous edition approved in 20112015 as D721 06(2011).D721 15. DOI: 10.1520/D0721-15.10.1520/D0721-17.In the IP, this
12、 test method is under the jurisdiction of the Standardization Committee. This test method was issued as a joint ASTM-IP tentative in 1964.This test method was prepared jointly by the Technical Association of Pulp and Paper Industry and ASTM International.This test method has been adopted for use by
13、government agencies to replace Method 5431 of Federal Test Method Standard No. 79lb.2 This test method is being used by some laboratories for products of higher oil content.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For An
14、nual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR, U.K.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indicati
15、on of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be consi
16、dered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Apparatus5.1 Filter Stick and Assembly, consisting of a 10 mm diameter sintered glass filt
17、er stick of 10 m to 15 m maximum porediameter as determined by the method in Appendix X1, provided with an air pressure inlet tube and delivery nozzle. It is providedwith a ground-glass joint to fit a 25 mm by 170 mm test tube. The dimensions for a suitable filtration assembly are shown in Fig.1.NOT
18、E 2Ametallic filter stick may be employed if desired.Afilter stick made of stainless steel and having a 12.7 mm (12 in.) disk of 10 m to 15 mmaximum pore diameter, as determined by Test Method E128, has been found to be satisfactory.5 The metallic apparatus is inserted into a 25 mm by150 mm test tub
19、e and held in place by means of a cork.5.2 Cooling Bath, consisting of an insulated box with 30 mm 6 5 mm (1.2 in. 6 0.2 in.) holes in the center to accommodateany desired number of test tubes. The bath may be filled with a suitable medium such as kerosine, and may be cooled by circulatinga refriger
20、ant through coils, or by using solid carbon dioxide. A suitable cooling bath to accommodate three test tubes is shown inFig. 2.5.3 Pipet, or equivalent dispensing device capable of delivering 1 g 6 0.05 g of molten wax.5.4 Transfer Pipet, or equivalent volume dispensing device, capable of delivering
21、 15 mL 6 0.06 mL.5.5 Air Pressure Regulator, designed to supply air to the filtration assembly (8.5) at the volume and pressure required to givean even flow of filtrate. Either the conventional pressure-reducing valve or a mercury bubbler-type regulator has been foundsatisfactory. The latter type, i
22、llustrated in Fig. 3, consists of a 250 mL glass cylinder and a T-tube held in the cylinder by meansof a rubber stopper grooved at the sides to permit the escape of excess air. The volume and pressure of the air supplied to thefiltration assembly is regulated by the depth to which the T-tube is imme
23、rsed in mercury at the bottom of the cylinder. Absorbentcotton placed in the space above the mercury prevents the loss of mercury by spattering. The air pressure regulatory is connectedto the filter stick and assembly by means of rubber tubing.5.6 Temperature Measuring Temperature-Measuring Device:5
24、 The sole source of supply of a suitable metal filter stick with designated porosity G known to the committee at this time is the Pall Corporation, 2200 Northern BoulevardEast Hills, NY 11548. A list of United Kingdom suppliers can be obtained from Energy Institute, 61 New Cavendish St., London, W1G
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