1、Designation: D7224 12 An American National StandardStandard Test Method forDetermining Water Separation Characteristics of Kerosine-Type Aviation Turbine Fuels Containing Additives byPortable Separometer1This standard is issued under the fixed designation D7224; the number immediately following the
2、designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis test method was devel
3、oped to satisfy three objectives: (1) Develop a test method that wouldrespond in the same manner as Test Method D3948 to strong surfactants, but not give lowmicro-separometer (MSEP) ratings to fuels containing weak surfactants (additives) that do not degradethe performance of commercial filter separ
4、ator elements; (2) Use filter media in the coalescer test thatwould be representative of the filtration media in commercial filter separator elements; and (3)Improve the precision of the test method compared to Test Method D3948.This test method was developed using material that is representative of
5、 coalescing materialscurrently used in commercial filter separator elements. The fiberglass coalescing material used in TestMethod D3948 was suitable for coalescing filters in use when that test method was developed, butdevelopments in coalescing elements in the intervening years have resulted in im
6、proved materials thatare not affected by weak surfactants. Test Method D3948 yields low results on some additized fuelsthat do not affect the performance of filter separators (coalescing filters) in actual service. Since thistest method was developed with material that is representative of the media
7、 used in current filterseparators, the results by this test method are more relevant to performance in current filter separators.1. Scope*1.1 This test method covers a rapid portable means for fieldand laboratory use to rate the ability of kerosine-type aviationturbine fuels, both neat and those con
8、taining additives, torelease entrained or emulsified water when passed throughfiberglass coalescing material.1.1.1 This test method is applicable to kerosine-type avia-tion turbine fuels including: Jet A and Jet A-1 (as described inSpecification D1655); JP-5, JP-7, JP-8, and JP-8+100. (SeeSection 6.
9、)1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish ap
10、pro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specificwarning statements, see 8.2-8.5.2. Referenced Documents2.1 ASTM Standards:2D1655 Specification for Aviation Turbine FuelsD2550 Method of Test for Water Separation Characteristi
11、csof Aviation Turbine Fuels (Withdrawn 1989)3D3602 Test Method for Water Separation Characteristics ofAviation Turbine Fuels (Withdrawn 1994)3D3948 Test Method for Determining Water Separation Char-acteristics ofAviation Turbine Fuels by Portable Separom-eter1This test method is under the jurisdicti
12、on of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.J0 on Aviation Fuels.Current edition approved Dec. 1, 2012. Published April 2013. Originallyapproved in 2005. Last previous edition approved in 2008 as D722408. DOI:10.1520/D7224-12.2For
13、referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenc
14、ed onwww.astm.org.*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 States1D4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace Contamination2.2 Military
15、 Standards:4MIL-DTL-5624 Turbine Fuel, Aviation Grades JP-4, JP-5,and JP-5/JP- 8 STMIL-DTL-25524 Turbine Fuel, Aviation, Thermally StableMIL-DTL-38219 Turbine Fuels, Low Volatility, JP-7MIL-DTL-83133 Turbine Fuel, Aviation, Kerosene Types,NATO F-34 (JP-8), NATO F-35, and JP-8+1003. Terminology3.1 De
16、finitions:3.1.1 Micro-Separometer5rating (MSEP5rating), nin theaviation fuel industry, a numerical value indicating the ease ofseparating emulsified water from aviation (jet) fuel by coales-cence as affected by the presence of surface active materials(also known as surface active agents or surfactan
17、ts).3.1.1.1 DiscussionMSEP ratings are only valid within therange of 50 to 100, with ratings at the upper end of the rangeindicating a clean fuel with little or no contamination bysurfactants, which is expected to show good water-separatingproperties when passed through a filter-separator (coalescin
18、gtype filter) in actual service.3.1.2 reference fluid, nin MSEP and DSEP5diesel sepa-rability water separability tests, a reference fluid base to whicha prescribed quantity of a known surface active agent has beenadded.3.1.2.1 DiscussionThe known surface active agent is typi-cally bis-2-ethylhexyl s
19、odium sulfosuccinate, commonly re-ferred to as AOT, dissolved in toluene.3.1.3 reference fluid base, nin aviation MSEP waterseparability tests, jet fuel that has been cleaned in a prescribedmanner to remove all surface-active contaminants (agents), andhaving a minimum MSEP rating of 97.3.1.4 surfact
20、ant, nin petroleum fuels, surface active ma-terial (or surface active agent) that could disarm (deactivate)filter separator (coalescing) elements so that free water is notremoved from the fuel in actual service.3.1.4.1 DiscussionTechnically, surfactants affect the inter-facial tension between water
21、and fuel which affects thetendency of water to coalesce into droplets.3.1.5 strong surfactant, nin petroleum fuels, surface activematerial that disarms filter separator elements, allowing waterto pass.3.1.5.1 DiscussionStrong surfactants can be refinery pro-cess chemicals left in the fuel or contami
22、nants introducedduring transportation of the fuel.3.1.6 weak surfactant, nin petroleum fuels, surface activematerial, typically certain types of additives such as staticdissipator additive, that does not adversely affect the perfor-mance of filter separator elements in actual service.3.2 Definitions
23、 of Terms Specific to This Standard:3.2.1 MCell6Coalescer, nreferring to a particular coalesc-ing filter element specifically designed for this test method.3.3 Abbreviations:3.3.1 AOTaerosol OT (see 8.1).3.3.2 MSEPMicro-Separometer.3.3.3 SDAstatic dissipator additive.4. Summary of Test Method4.1 A w
24、ater/fuel sample emulsion is created in a syringeusing a high-speed mixer. The emulsion is then expelled fromthe syringe at a programmed rate through a specific fiberglasscoalescer, the MCell Coalescer,6and the effluent is analyzedfor uncoalesced water (that is, dispersed water droplets) by alight t
25、ransmission measurement. The Micro-Separometer in-strument has an effective range of 50-to-100 scaled to thenearest whole number. A test can be performed in 5 to 10minutes.5. Significance and Use5.1 This test method provides a measurement of the pres-ence of surfactants in aviation turbine fuels. Li
26、ke previousobsolete Test Methods D2550 and D3602 and current TestMethod D3948, this test method can detect trace amounts ofrefinery treating chemicals in fuel. The test methods can alsodetect surface active substances added to fuel in the form ofadditives or picked up by the fuel during handling fro
27、m pointof production to point of use. Some of these substancesdegrade the ability of filter separators to separate free waterfrom the fuel.5.2 This test method yields approximately the same (low)MSEP ratings as Test Method D3948 for fuels that containstrong surfactants.5.2.1 This test method will gi
28、ve approximately the sameMSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels asTest Method D3948 when testing reference fluids.5.3 The MSEP ratings obtained by this test method are lessaffected by weak surfactants than Test Method D3948. Some-what higher MSEP ratings for Jet A, Jet A-1, JP-5
29、, JP-7, andJP-8 fuels are obtained by this test method than those obtainedby Test Method D3948 when additives such as static dissipateradditives (SDA) and corrosion inhibitors are present in thefuel. This correlates with the satisfactory performance of filterseparators for such fuels, when wet. Howe
30、ver, these sameadditives adversely affect the MSEP ratings obtained by TestMethod D3948 by erroneously indicating that such additizedfuels would significantly degrade the ability of filter separatorsto separate free water from the fuel in actual service.5.4 The Micro-Separometer instrument has an ef
31、fectivemeasurement range from 50 to 100. Values obtained outside ofthose limits are undefined and invalid.NOTE 1In the event a value greater than 100 is obtained, there is agood probability that light transmittance was reduced by material,typically water, contained in the fuel that was used to set t
32、he 100 reference4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.5Atrademark of EMCEE Electronics, Inc., 520 CypressAve., Venice, FL 34285,www.emcee-.6A registered trademark of EMCEE Electronics, Inc., 520 Cypress Ave.
33、, Venice,FL 34285, www.emcee-.D7224 122level. During the coalescing portion of the test, the contaminating materialas well as the 50 6 1 L of distilled water was subsequently removedduring this portion of the test. Thus, the processed fuel had a higher lighttransmittance than the fuel sample used to
34、 obtain the 100 reference levelresulting in the final rating measuring in excess of 100.6. Interferences6.1 Any suspended particles, whether solid or water drop-lets or haze, in a fuel sample will interfere with this testmethod, which utilizes light transmission of a fuel sample afteremulsification
35、with water and subsequent coalescence.7. Apparatus7.1 Micro-Separometer Instrument7is used to perform thetest. The unit is completely portable and self-contained, ca-pable of operating on an (optional) internal rechargeablebattery pack or being connected to an ac power source usingpower cords which
36、are available for various voltages. Connec-tion to an ac power source will provide power to the unit andeffect battery recharge. The power cords, test accessories andoperators manual can be packed in the cover of the lockablecase.NOTE 2An extensive study was performed to verify that the Mark XMicro-
37、Separometer instrument gives equivalent results to the Mark VDeluxe Micro-Separometer instrument. See Research Report RR:D02-1647.8NOTE 3The Mark X has a universal power supply and requires onlyone power cord as compared to the Mark V Deluxe that requires individualpower cords for different voltages
38、.7.1.1 Review the Operating Manual of the Micro-Separometer instrument that is furnished with each unit (and isalso available from the manufacturers website) for operatinginstructions. The instrument is not field repairable. Also notethat this instrument is designed to perform a number ofdifferent f
39、unctions in addition to this specific test method.7.1.2 The Micro-Separometer Mark V Deluxe and Mark Xinstruments and associated control panels are shown in Fig. 1and Fig. 2, respectively. The emulsifier is on the right side ofthe raised panel and the syringe drive mechanism is on the leftside. The
40、control panel containing the operating controls ismounted on the fixed panel in the left side of the case. Table 1lists the manual and audio operating characteristics of theinstrument.7.1.3 All of the controls are located in a push-button arrayon the control panel. The push-buttons illuminate when d
41、e-pressed thus indicating operational status. A circuit breakerlocated on the control panel provides protection for the acpower circuit.7.1.3.1 The Mark X has an LCD display on the controlpanel that provides information to the operator during the test.The information includes test status and an erro
42、r code thatdefines a malfunction in the Micro-Separometer instrument.7.1.4 The turbidimeter is located under the main controlpanel and consists of a well in which the sample vial is placed(in a specified orientation), a light source and a photocell.7.1.5 By depressing the ON push-button, the electro
43、niccircuits are energized. The ON push-button pulses on and offwhen the instruments are being operated by an ac source andremains constantly on when the battery (dc) pack is used. Thelettered push-buttons will sequentially illuminate indicatingREADY operational status.NOTE 4Of the lettered (A-G) pus
44、hbuttons on the control panel of theMark V Deluxe, only the A pushbutton is applicable to this test method.Of the lettered (Jet A Diesel) pushbuttons on the control panel of theMark X, only the Jet A pushbutton is applicable to this test method.7.1.6 The RESET push-button can be depressed at any tim
45、eto cancel the test in progress and restore the program to theinitial start mode. The lettered push-buttons commence tosequentially illuminate, thus indicating a READY operationalstatus enabling test mode selection.7.2 Mark V Operation:7.2.1 Depress the A push-button to select test Mode A. Thedepres
46、sed push-button and the START push-button will illu-minate.7.2.2 The START push-button, when depressed initially,initiates the CLEAN cycle causing the syringe drive mecha-nism to travel to the UP position and the emulsifier motor tooperate for the cleaning operation.7The sole source of supply of the
47、 apparatus, the Model 1140 Micro-SeparometerMark V Deluxe and Mark X instruments, known to the committee at this time isEMCEE Electronics, Inc., 520 Cypress Ave., Venice, FL 34285, www.emcee- . If you are aware of alternative suppliers, please provide thisinformation to ASTM International Headquarte
48、rs. Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.8Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1647.FIG. 1 Micro-Separometer Mark V Deluxe and Ass
49、ociated Control PanelD7224 1237.2.3 The START push-button, when depressed after thesecond CLEAN cycle initiates the automatic program sequencecausing the read indicator and the two ARROWED push-buttons to illuminate, indicating that a full-scale adjustmentperiod is in effect. A numerical value also appears on thedisplay.7.2.4 By depressing the appropriate ARROWED push-button, the displayed value on the meter can be increased ordecreased, as required, to attain the 100 reference level for thevial of fuel sample in
