1、Designation: D6371 16D6371 17Standard Test Method forCold Filter Plugging Point of Diesel and Heating Fuels1This standard is issued under the fixed designation D6371; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the determination of the cold filter plugging point (CFPP) temperature of diesel and domesticheat
3、ing fuels using either manual or automated apparatus.NOTE 1This test method is technically equivalent to test methods IP 309 and EN 116.1.2 The manual apparatus and automated apparatus are both suitable for referee purposes.1.3 This test method is applicable to distillate fuels, including those cont
4、aining a flow-improving or other additive, intended foruse in diesel engines and domestic heating installations.1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.5 WARNINGMercury has been designated by many regulatory agen
5、cies as a hazardous material that can cause centralnervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Cautionshould be taken when handling mercury and mercury-containing products. See the applicable product Material Safety Data She
6、et(MSDS) for details and EPAs websitehttp:/www.epa.gov/mercury/faq.htmfor additional information. Users should be awarethat selling mercury and/or mercury containing products in your state or country may be prohibited by law.1.6 This standard does not purport to address all of the safety concerns, i
7、f 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 use. For specific warning statements, see Section 7.1.7 This international standard was develope
8、d 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 to Trade (TBT) Committee.2. Referenced Documents2
9、.1 ASTM Standards:2D2500 Test Method for Cloud Point of Petroleum Products and Liquid FuelsD4057 Practice for Manual Sampling of Petroleum and Petroleum ProductsD4177 Practice for Automatic Sampling of Petroleum and Petroleum ProductsD5771 Test Method for Cloud Point of Petroleum Products and Liquid
10、 Fuels (Optical Detection Stepped Cooling Method)D5772 Test Method for Cloud Point of Petroleum Products and Liquid Fuels (Linear Cooling Rate Method)D5773 Test Method for Cloud Point of Petroleum Products and Liquid Fuels (Constant Cooling Rate Method)D7962 Practice for Determination of Minimum Imm
11、ersion Depth and Assessment of Temperature Sensor Measurement DriftE1 Specification for ASTM Liquid-in-Glass ThermometersE1137 Specification for Industrial Platinum Resistance ThermometersE2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision LiquidsE2877 Guide for Digit
12、al Contact Thermometers2.2 IP Standards:3IP 309 Diesel and domestic heating fuelsDetermination of cold filter plugging pointSpecifications for IP Standard Thermometers1 This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the dire
13、ct responsibility of SubcommitteeD02.07 on Flow Properties.Current edition approved Dec. 1, 2016May 1, 2017. Published January 2017June 2017. Originally approved in 1999. Last previous edition approved in 20102016 asD6371 05 (2010).D6371 16. DOI: 10.1520/D6371-16.10.1520/D6371-17.2 For referencedAST
14、M standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR, U.K.,
15、http:/www.energyinst.org.uk.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends
16、that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, Wes
17、t Conshohocken, PA 19428-2959. United States12.3 ISO Standards:4IP 3310 Test sievesTechnical requirements and testingPart 1: Metal cloth2.4 European Standards:5EN 116 Diesel and domestic heating fuelsDetermination of cold filter plugging point4 Available from American National Standards Institute (A
18、NSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from European Committee for Standardization (CEN), 36 rue de Stassart, B-1050, Brussels, Belgium, http:/www.cenorm.be.D6371 1723. Terminology3.1 Definitions:3.1.1 digital contact thermometer (DCT), nan electronic dev
19、ice consisting of a digital display and associated temperaturesensing probe.3.1.1.1 DiscussionThis device consists of a temperature sensor connected to a measuring instrument; this instrument measures the temperature-dependent quantity of the sensor, computes the temperature from the measured quanti
20、ty, and provides a digital output. This digitaloutput goes to a digital display and/or recording device that may be internal or external to the device. These devices are sometimesreferred to as a “digital thermometer.”3.1.1.2 DiscussionPET is an acronym for portable electronic thermometers, a subset
21、 of digital contact thermometers (DCT).3.2 Definitions of Terms Specific to This Standard:3.2.1 certified reference material, na stable petroleum product with a method-specific nominal CFPP value established by amethod-specific interlaboratory study following RR:D02-10076 guidelines or ISO Guides 34
22、 and 35.43.2.2 cold filter plugging point, nhighest temperature, expressed in multiples of 1 C, at which a given volume of fuel failsto pass through a standardized filtration device in a specified time when cooled under the conditions prescribed in this test method.4. Summary of Test Method4.1 A spe
23、cimen of the sample is cooled under specified conditions and, at intervals of 1 C, is drawn into a pipet under acontrolled vacuum through a standardized wire mesh filter. The procedure is repeated, as the specimen continues to cool, for each1 C below the first test temperature. Testing is continued
24、until the amount of wax crystals that have separated out of solution issufficient to stop or slow down the flow so that the time taken to fill the pipet exceeds 60 s or the fuel fails to return completelyto the test jar before the fuel has cooled by a further 1 C.4.2 The indicated temperature at whi
25、ch the last filtration was commenced is recorded as the CFPP.5. Significance and Use5.1 The CFPP of a fuel is suitable for estimating the lowest temperature at which a fuel will give trouble-free flow in certainfuel systems.5.2 In the case of diesel fuel used in European light duty trucks, the resul
26、ts are usually close to the temperature of failure inservice except when the fuel system contains, for example, a paper filter installed in a location exposed to the weather or if thefilter plugging temperature is more than 12 C below the cloud point value in accordance with Test Method D2500, D5771
27、, D5772,or D5773. Domestic heating installations are usually less critical and often operate satisfactorily at temperatures somewhat lowerthan those indicated by the test results.5.3 The difference in results obtained from the sample as received and after heat treatment at 45 C for 30 min can be use
28、d toinvestigate complaints of unsatisfactory performance under low temperature conditions.6. Apparatus6.1 Manual Apparatus:6.1.1 The apparatus, as detailed in 6.1.2 6.1.13, shall be arranged as shown in Fig. 1.6.1.2 Test Jar, cylindrical, of clear glass, flat bottomed, with an internal diameter of 3
29、1.5 mm 6 0.5 mm, a wall thickness of1.25 mm 6 0.25 mm and a height of 120 mm 6 5 mm. The jar shall have a permanent mark at the 45 mL 6 1 mL level.NOTE 2Test jars of the required dimensions may be obtained by selection from jars conforming to Test Method D2500, which specifies a widerdiameter tolera
30、nce.6.1.3 Jacket, brass, watertight, cylindrical, flat bottomed, to be used as an air bath. It shall have an inside diameter of 45 mm6 0.25 mm, outside diameter of 48 mm 6 0.25 mm, and a height of 115 mm 6 3 mm (see Fig. 2).6.1.4 Insulating Ring, made from oil-resistant plastics or other suitable ma
31、terial, to be placed in the bottom of the jacket (see6.1.3) to provide insulation for the bottom of the test jar. It shall fit closely inside the jacket and have a thickness of 6 mm + 0.3 mm- 0.0 mm.6 Supporting data have been filed at ASTM International Headquarters and may be obtained by requestin
32、g Research Report RR:D02-1007. Contact ASTM CustomerService at serviceastm.org.D6371 1736.1.5 Spacers (two),approximately 5 mm thick, made of oil-resistant plastics or other suitable material, to be placed as shownin Fig. 1 around the test jar (see 6.1.2) to provide insulation for the test jar from
33、the sides of the jacket. The spacers shall fit closelyto the test jar and closely inside the jacket. The use of incomplete rings, each with a 2 mm circumferential gap, will accommodatevariations in test jar diameter. The spacers and insulating ring may be made as a single part as shown in Fig. 3.6.1
34、.6 Supporting Ring, of oil resistant plastics or other suitable non-metallic, non-absorbent, oil-resistant material, used tosuspend the jacket (see 6.1.3) in a stable and upright position in the cooling bath and to provide a concentric location for the stopper(see 6.1.7). A design is shown in Fig. 4
35、 for guidance, but this design may be modified to suit the cooling bath.6.1.7 Stopper, of oil-resistant plastics or other suitable nonmetallic, nonabsorbent, oil-resistant material, to fit the test jar and thesupport ring as shown in Fig. 5. It shall have three holes to accommodate the pipet (see 6.
36、1.8) and the thermometer (see 6.1.9)and to allow venting of the system. If necessary, when using the high-range thermometer (see 6.1.9), the upper part of the stoppershall have an indentation to permit the thermometer (see 6.1.9) to be read down to a temperature of 30 C.Apointer shall be fittedto th
37、e upper surface of the stopper to facilitate location of the thermometer in relation to the bottom of the test jar. A spring wireclip shall be used to retain the thermometer in the correct position.6.1.8 Pipet with Filter Unit:6.1.8.1 Pipet, of clear glass with a calibration mark corresponding to a
38、contained volume of 20 mL6 0.2 mLat a point 149 mm6 0.5 mm from the bottom of the pipet (see Fig. 6). It shall be connected to the filter unit (see 6.1.8.2).6.1.8.2 Filter Unit (see Fig. 7),containing the following elements:(1) Brass Body, with a threaded cavity that houses the wire mesh holder.The
39、cavity shall be fitted with an O-ring of oil-resistantplastics. The internal diameter of the central tube shall be 4 mm 6 0.1 mm.(2) Brass Screw Cap, to connect the upper part of the body of the filter unit (see 6.1.8.2) to the lower part of the pipet (see6.1.8.1) to ensure a leak-free joint. An exa
40、mple of satisfactory connection is shown in Fig. 7.(3) Disc, 15 mm 6 0.1 mm diameter, of plain weave stainless steel wire mesh gauze with a nominal aperture size of 45 m.The nominal diameter of the wire shall be 32 m, and the tolerance for the size of an individual aperture shall be as follows:No ap
41、erture size shall exceed the nominal size by more than 22 m.The average aperture size shall be within 6 3.1 m of the nominal size.Not more than 6 % of the apertures shall be above the nominal size by more than 13 m.(4) Filter Holder of Brass, in which the disc of wire mesh gauze (see 6.1.8.2 (3) is
42、firmly clamped by a retaining ring pressedinto the filter holder. The diameter of the exposed part of the gauze shall be 12 mm + 0.1 mm 0.0 mm (see Fig. 8).(5) Brass Cylinder, threaded on the outside, that can be screwed into the cavity of the body (see 6.1.8.2 (1) to clamp the filterholder (see 6.1
43、.8.2 (4) against the O-ring (6.1.8.2 (1), The lower end shall have four slots to allow the specimen to flow into thefilter unit.NOTE 3The requirements for the wire mesh are taken from IP 3310, to which reference may be made for methods for testing the gauze.6.1.9 Temperature Measuring DeviceEither a
44、 liquid-in-glass thermometer as described in 6.1.9.1 or a digital contactthermometer (DCT) meeting the requirements described in 6.1.9.2.6.1.9.1 Liquid-in-glass Thermometers, having ranges shown below and conforming to the requirements prescribed inSpecifications E1 or E2251, or Specifications for I
45、P Standard Thermometers.Thermometer NumberThermometer Temperature Range ASTM IPHigh-range for CFPP down to30 C38 C to +50 C 5C, S5C 1CLow-range from CFPP below30 C80 C to +20 C 6C 2CCooling bath 80 C to +20 C 6C 2CD6371 1746.1.9.2 Digital contact thermometer requirements:Parameter RequirementDCT Gui
46、de E2877 Class G or betterTemperature Range 80 C to +50 CDisplay Resolution 0.1 C, minimumSensor Type Platinum Resistance Thermometer (PRT)Sensor 3 mm o.d. sheath with a sensing element less than 10 mm in lengthMinimum Immersion Less than 40 mm per Practice D7962.Accuracy 500 mK (0.5 C) for combined
47、 probe and sensorResponse Time Less than or equal to 25 s as defined in Specification E1137.Drift Less than 500 mK (0.5 C) per year.Calibration Error Less than 500 mK (0.5 C) over the range of intended use.Calibration Range 80 C or lower to +50 CCalibration Data 4 data points evenly distributed over
48、 calibration range with data included in calibration report.Calibration Report From a calibration laboratory with demonstrated competency in temperature calibration which istraceable to a national calibration laboratory or metrology standards body.NOTE 4A DCT display mounted on the end to the probes
49、 sheath is likely not suitable due to temperature exposure of the electronics. Consultmanufacturer for temperature limitations.6.1.9.3 The DCT calibration drift shall be checked at least annually by either measuring the ice point or against a referencethermometer in a constant temperature bath at the prescribed immersion depth to ensure compliance with 6.1.9.2. See PracticeD7962.NOTE 5When a DCTs calibration drifts in one direction over several calibration checks, it may be an indication of deterioration
