1、Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Richmond, ATTN: DSCR-VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616, or e-mailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address
2、 information using the ASSIST database at https:/assist.daps.dla.mil/. AMSC N/A FSC 6810 METRIC MIL-DTL-5020E 19 February 2010 SUPERSEDING MIL-DTL-5020D 31 July 2003 DETAIL SPECIFICATION LIQUID, COMPASS, AIRCRAFT Reactivated after 19 February 2010 and may be used for new and existing designs and acq
3、uisitions. This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification describes the characteristics and provides the requirements for a refined fraction of crude petroleum, intended for use in fluid-filled aircraft magn
4、etic compasses. 1.2 Classification. 1.2.1 Military symbol. The product represented under this specification is identified by military symbol FDC. 1.2.2 NATO code. The product represented under this specification is identified by NATO code number S-712. 2. APPLICABLE DOCUMENTS 2.1 General. The docume
5、nts listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list
6、, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3 and 4 of this specification, whether or not they are listed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5020E 2 2.2 Govern
7、ment documents. 2.2.1 Standards. The following standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARD FED-STD-791 - Testing Method of Lubricants, Liquid Fuels,
8、and Related Products DEPARTMENT OF DEFENSE STANDARD MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product (Copies of these documents are available online at https:/assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5
9、094.) 2.2.2 Other government publications. The following other government publication forms a part of this document to the extent specified herein. Unless otherwise specified, the issue of this document is that cited in the solicitation or contract. CODE OF FEDERAL REGULATIONS 29 CFR 1910 - Occupati
10、onal Safety and Health Standards (Copies of this document are available online at http:/www.gpoaccess.gov/cfr/ or from the Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954.) 2.3 Non-government publications. The following documents form a part of this document to the extent spe
11、cified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM D56 - Standard Test Method for Flash Point by Tag Closed Cup Tester ASTM D86 - Standard Test Method for Distillation of Petroleum Products at Atmospheric
12、Pressure ASTM D130 - Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test ASTM D156 - Standard Test Method for Saybolt Color of Petroleum Products (Saybolt Chromometer Method) Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
13、e from IHS-,-,-MIL-DTL-5020E 3 ASTM INTERNATIONAL - Continued ASTM D445 - Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity) ASTM D1319 - Standard Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicato
14、r Adsorption ASTM D4057 - Standard Practice for Manual Sampling of Petroleum and Petroleum Products ASTM E2072 - Standard Specification for Photoluminescent (Phosphorescent) Safety Markings (Copies of these documents are available online at http:/www.astm.org/ or from ASTM International, 100 Barr Ha
15、rbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document,
16、 however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Material. The liquid shall be a refined fraction of cru
17、de petroleum, filtered to be free of visible contamination, and entirely applicable and appropriate for the intended purpose. 3.3 Physical properties. The properties of the compass liquid shall conform to the requirements specified in table I and 3.4 when tested as specified in 4.5. TABLE I. Compass
18、 liquid properties. Characteristic Specified Copper corrosion (max.) 1a Flash point C (min.) 32.2 Distillation range end point C (max.) 260 Reaction after oxidation Neutral Original +25 After light stability test1+21 Color, Saybolt (min.) After oxygen stability test2+21 At 38 C 0.90 to 1.15 Kinemati
19、c viscosity (centistokes) At 0 C (max.) 2.30 Aromatics, vol % (max.) 10.0 1 Requirements shall be met after 18 hours of exposure (see 4.4.2). 2 See 4.4.3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5020E 4 3.4 Liquid performance. The per
20、formance of the compass liquid shall conform to the following requirements. 3.4.1 Freezing point and cloudiness. When tested as specified in 4.4.4, the compass liquid shall not gel, crystallize, or solidify after being maintained at a temperature at or below -53.9 C for a time period of 30 minutes.
21、At the end of the test, the turbidity or haze of the liquid shall not be greater than the turbidity standard for barium sulfate suspension as determined in 4.4.4.1. 3.4.2 Fluorescence. The fluorescence of the compass liquid shall not exceed 3.183 millicandela/m2(mcd/m2) as determined in accordance w
22、ith 4.4.5. 3.5 Toxicity. The compass liquid shall have no adverse effect on the health of personnel when used for its intended purpose. The compass liquid shall not contain elements that produce noxious vapors or irritate personnel during formulation or use under conditions of adequate ventilation.
23、Caution shall be exercised to avoid prolonged contact with the skin. Occupational Safety and Health Administration (OSHA) standards and guidelines shall be observed in accordance with 29 CFR 1910. Questions pertaining to any toxic effects of the liquid shall be referred by the procuring activity to
24、the appropriate departmental medical service that will act as an advisor to the procuring activity. 3.6 Workmanship. The compass liquid shall be uniform in quality and shall meet all requirements of this specification. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements sp
25、ecified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. When first article inspection is required (see 3.1 and 6.2), the number and type of units shall be specified. Each submitted unit shall undergo the exam
26、ination for defects specified in table II, the examinations specified in paragraphs 4.4.1 through 4.4.6, and the tests specified in 4.5. Any unit displaying any major defect shall be rejected. Any unit failing any of the tests in 4.5 shall be rejected. 4.3 Conformance inspection. Conformance inspect
27、ion shall consist of the visual examination for defects listed in table II as well as the examinations of paragraphs 4.4.1 through 4.4.6. Unless otherwise specified (see 6.2), the manufacturer shall select the type of sampling plan (attribute, variable, or continuous) in accordance with MIL-STD-1916
28、. The sample size shall be selected in accordance with verification level I of MIL-STD-1916. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5020E 5 TABLE II. Classification of defects. Examination Defect Major Contamination Contamination is
29、visible in the liquid 101 Saybolt color scale minimum value less than +21 102 Color and precipitation determination for light stability Precipitation is present after light stability test 103 Color and reaction not as specified 104 Color and reaction determination for oxygen stability Precipitation
30、is present after oxygen stability test 105 Gelling, crystallization, or solidification of the liquid is present 106 Freezing point and cloudiness The turbidity of the compass liquid sample is greater than that of the turbidity standard 107 Fluorescence Fluorescence exceeds 3.183 mcd/m2108 Constructi
31、on is defective 109 Container is leaking 110 Filled container Container is not filled to proper level 111 4.4 Examinations. 4.4.1 Test preparation. Measure two quarts of the liquid in accordance with the method described in ASTM D4057. 4.4.2 Color and precipitation determination for light stability.
32、 The following test procedures shall be performed. a. Fill a Vycortest tube, or an equivalent high temperature test tube, measuring approximately 25 millimeters (mm) outside diameter and 200 mm long with compass liquid. b. Enclose the compass liquid in a Corex Dglobe, or equivalent filtering globe,
33、and expose it to the light of a 13-ampere carbon arc lamp using Atlas Fade-OmeterNo. 70 and No. 20 carbons, or equivalent. c. Place the test tube in a vertical position 1 foot from the arc, or a distance recommended by the manufacturer of the test instrument as applicable, and in approximately the s
34、ame horizontal plane. Make color determinations after exposure of 1, 4, and 18 hours. d. Examine the sample for precipitation after the light stability test has been performed. There shall be no precipitation. 4.4.3 Color and reaction determination for oxygen stability. The following test procedures
35、 shall be performed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5020E 6 a. Fill a suitable glass container, such as an oil sample bottle, to nearly the top of the container with compass liquid and place it into a suitable metal bomb havi
36、ng an internal capacity of approximately one and one half times the external volume of the bottle. b. Arrange the metal bomb so that it can be tightly closed and charged with oxygen after the sample is in place. Then charge the bomb with oxygen at 95 to 100 pounds per square inch pressure at room te
37、mperature. c. Test the metal bomb for leaks. If the test displays no leaks then place the bomb in a suitable bath maintained at 95 C to 100 C for 6 hours. d. Cool the metal bomb in cold water and remove the sample. Subject the sample to the Saybolt color and oxidation reaction tests in this specific
38、ation. e. Examine the sample for the presence of precipitation after the oxygen stability test has been performed. There shall be no precipitation. 4.4.4 Freezing point and cloudiness. The following test procedures shall be performed. 4.4.4.1 Preparation of barium sulfate turbidity standard. The fol
39、lowing test procedures shall be performed. a. Pour 25 milliliters (mL) of a 0.00322-molar solution of barium chloride into a 250 mL volumetric flask. Add 200 mL of distilled water and 25 mL of 0.50 N sulfuric acid. b. Shake the solution well to ensure complete precipitation and pour it into a 4-ounc
40、e bottle. Stopper the bottle and use the suspension within one-half hour after preparation as the turbidity standard. 4.4.4.2 Storage of compass liquid for examination. A sample of the compass liquid shall be placed into a clean 4-ounce sample bottle that has previously been dried in an oven at 100
41、C for not less than 24 hours. The bottle shall be tightly stoppered and stored at a temperature at or below -53.9 C for 30 minutes. 4.4.4.3 Examination of cloud samples. The following examination procedures shall be performed. a. After 30 minutes, remove the sample from storage and shake it vigorous
42、ly for 10 seconds. b. Examine the sample to ensure that there is no evidence of gelling, crystallization, or solidification of the liquid, and that the turbidity of the compass liquid sample is not greater than that of the standard as specified in 4.4.4.1. c. Shake the turbidity standard vigorously
43、within five minutes prior to making any comparisons. If frosting interferes with the turbidity evaluation, the bottle containing the compass liquid may be quickly dipped into a 50/50 (by volume) mixture of glycerin-methanol, previously cooled to the storage temperature. Provided by IHSNot for Resale
44、No reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5020E 7 d. Ensure that no more than one minute has elapsed between removing the compass liquid sample from the low temperature storage and completing the test. 4.4.5 Fluorescence. The following measuring procedures shall be
45、 performed using an illuminometer or low-brightness photometer capable of accurately measuring ultraviolet light in the spectral region of 365 nanometers (nm). The illuminometer or photometer shall have the capability of taking brightness or luminance measurements at a 45-degree angle of incidence,
46、or the manufacturer of the test system shall provide an equivalent method for brightness measurement. a. Place the sample in an absorption cell constructed of non-fluorescent glass having a 10 mm light path through the liquid and an inside diameter of 32 mm. b. Measure the brightness at a 45-degree
47、angle to the plane of the flat surface at the absorption cell. The illumination shall be incident at a 45-degree angle to the plane of the flat surface of the absorption cell and shall approach the sample at right angles to the direction of observation. A non-fluorescent white paper backing may be u
48、sed behind the cell to create better field uniformity. c. Excite the specimen in this position with ultraviolet light of 365 nm wavelength until it reaches a constant brightness. The proper intensity of the light source and specimen shall be determined with the aid of a pre-calibrated reference stan
49、dard designed for ultraviolet light intensity calibration. The method of calibrating the light source intensity shall be one acceptable to the customer. The luminance or brightness value shall be reported in mcd/m2as referenced in ASTM E2072. 4.4.6 Examination of filled containers. Each sample container shall be examined for defective construction, evidence of leakage, and net content. 4.5 Tests. Tests sha
