1、e I - MIL-F-81712 (3) 71 7777706 0110637 T AMENDMENT 3 Superseding AMENDMENT 2 19 June 1973 28 June 1477 MI LITARY SPEC IF ICAT ION FUEL, EXPENDABLE TURBINE ENGINE This Amendment forms a part of Military Secification MIL-F-81912(AS) of 14 February 1973 and has been approved by the Naval Air Systems
2、Command, Department of the Navy. Pages 2 and 3, I Table I: Delete and substitute the attached Table I which forms Page 2 ofthis Amendment. Page 3, Para. 3.3: Delete paragraph 3.3 and substitute: * 3.3 h.ticxidants - In order to prevent the formation of gums and peroxides, approved antioxidants shall
3、 be blended separately, or in combination, into the fuel in total concen- tration of not less than 6.0 lbs nor more than 8.4 lbs. of active ingredient per 1,000 barrels of fuel (17.2 to 24.0 mg/l). This addition shall occur immediately after the processing of the fuel at the refinery before it is pl
4、aced in storage. The following active inhibitors are approved for use as antioxidants: (a) 2,-ditertiary butyl-4-methylphenol (b) 2,4-dimethyl-6-tert iary but ylphenol (c) 72 percent min. 2,4-dimethyl-6-tertiary butylphenol 28 percent max. monomethyl and dimethyl tertiary butylphenols (d) 55 percent
5、 min. 2,4-dimethyl-6-tertiary butylphenol 15 percent min. 2,6-ditertiary butyl-4-met hylphenol 30 percent max. mixed monomethyl and dimethyl tertiary butylphenol s (e) 2,6-ditertiary butylphenol (f) 75 percent min. 2,6-ditertiary butylphenol 25 percent max. mixed tertiary and tritertiary but ylpheno
6、l s (8) 60 percent min. 2,4-ditertiary butylphenol 40 percent max. mixed tertiary butylphenols FSC -91 30 Licensed by Information Handling ServicesMIL-F-81912 (AS) AMENDMENT 3 TABLE I. Chemical and Physical Requirements and Test Methods. Requirements Fue 1 Test Met hod ASTM Standards Dis t i 1 1 at
7、i on : Initial boiling point, min 360F Fuel recovered, 20 percent at Fuel recovered, 10 percent at 365-375F Fuel recovered, 50 percent at 370-38O0F Fuel recovered, 90 percent at 375-385OF End Point, max 425F Residue, vol percent max 14 Distillation loss, vol percent max 1% 2. o mg/lOO ml max 4. O Gr
8、avity OAPI - min (sp gr max) 44 (0.806) Existent gum, mg/100 ml max Gravity OAPI - max (sp gr Ein) 48 (0.788) Total potential residue, 16 hour aging, Sulfur, total, percent weight max O. 05 0.001 Mercaptan sulfur, percent weight max - 3/ * Freezing point, max -60F (-51.1“C) D86 - i/ D287 D287 D381 D
9、873 E1266 D1219 or D1323 D2386 Heating Value: Net heat of combustion, BTll/lb, min 18,500 D240 or aniline-gravity product, min 4/ 6,000 D611 and D287 * Viscosity, Centistokes -50F(-45.6-C) max 11.5 D445 * Aromatics, vol percent, max/min 15.0/4. O D1319 Olefins, vol percent max 1. o D1319 Smoke point
10、, mm min 19 D1322 5/ Explosiveness, percent max 50 6/ Flash point, min 140F (6O.O0C) D 97 Copper strip corrosion, (2hr- at 212F (lOOOC), max No. 1 D130 Water separation index, modified min 85 D2550 Particulate matter, mg/liter, max 1.0 D2276 or luminometer no., min 50 D1740 .- - i/ A condenser tempe
11、rature of 32 to 40F (Oo to 4C) shall - 2/ To be reported - not limited. 3/ The mercaptan sulfur determination may be waived at the option of the inspector if the fuel is “doctor sweet“ when tested in accordance with the doctor test of ASTM D484. gravity in OAPI and the aniline point in OF. is not ap
12、plicable. Fed. Test Method Std. 791. be used. - 4/ Aniline-gravity product is defined as the product of the - 5/ That portion of D1322 pertaining to testing bottom fractions - 6/ Test shall be performed in accordance with method 1151 of Page 2 of 3 Licensed by Information Handling Services- r . _ -
13、MIL-F-81712 (3) 91 m 9777906 0110639 3 MIL-F-81912 (AS) AMENDMENT 3 * The margins of this Amendment are marked with asterisks to indicate where changes (additions, modifications, corrections, deletions) to the previous Amendment were made. This was done as a convenience only and the government assum
14、es no liability what-so-ever for any inaccura- cies in these notations. Bidders and Contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous Amendment. Preparing Activity: Navy AS (Project No. 9130-1!089) f U. S. GOVERNMENT PRINTING OFFICG 1977-70+0N/4240 Page 3 of 3 /- e, .f Y,- -, Licensed by Information Handling Services
