MIL-DTL-46162E
4.1.2.2 Examination of filled containers. Examine fuels for compliance to MIL-STD-290
with regard to fill, closure, sealing, leakage, packaging, packing, and marking requirements.
Reject any container having one or more defects or under the required fill.
4.2 Verification alternatives. The manufacturer may propose alternative test methods to
those listed in tables I and II, such as techniques or equipment, including cost-effective sampling
procedures, to verify performance. See the contract for alternatives that replace verifications
required by this specification.
4.3 Test methods. Tests shall be performed in accordance with the applicable methods listed
as specified for referee fuel types I and II (see 4.3.1 and 4.3.2). For rounding off of significant
figures, ASTM E29 shall apply to all tests required by this specification.
4.3.1 Test methods for type I. Tests shall be performed in accordance with the applicable
methods listed in 3.3.1 (table I) and appendix A.
4.3.2 Test methods for type II. Tests shall be performed in accordance with the applicable
methods listed in 3.3.2 (table II), appendix B and C and those specified herein.
4.3.2.1 Thermal stability. The thermal stability test shall be conducted using ASTM D3241
Jet Fuel Thermal Oxidation Tester (JFTOT). The heater tube shall be rated visually
(see appendix C).
4.3.2.2 ASTM D3241 test conditions.
260 degrees Celsius (°C)
a. Heater tube temperature at maximum point:
(500 degrees Fahrenheit (°F)).
b. Fuel system pressure:
3.45 MPa (500 pounds per square
inch gage (psig))
c. Fuel flow rate:
3.0 mL/min (0.1 ounce/min)
d. Test duration:
150 minutes.
4.3.2.3 Acceptability criteria. The fuel sample is acceptable if all the following criteria
are met:
a. The maximum differential pressure across the test filter does not exceed 25 mm
(1 in.) of mercury.
b. The maximum visual rating of the heater tube deposits is less than a code 3, and
visual rating of the heater tube shows neither peacock type deposits (code P) nor
abnormal type deposits (code A) (see appendix C.5.3.1 and C 5.3.2).
4.3.2.4 ASTM D3241 recorded data. The following data shall be recorded.
a. Differential pressure in millimeter of mercury at 150 minutes, or time to differential
pressure of 25 mm of mercury, whichever comes first.
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