MIL-DTL-5624V
4.3.2.1.1 Test conditions.
a. Minimum heater tube temperature at maximum point: 260 C
b. Fuel system pressure: 3.45 MPa (500 psig)
c. Fuel flow rate: 3.0 mL/minute
d. Test duration: 150 minutes
4.3.2.1.2 ASTM D3241 procedure.
a. Record the differential pressure in mm Hg at 150 minutes, or time to differential
pressure of 25 mm Hg, whichever comes first.
b. Record the heater tube deposit code rating at the end of the test.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in
the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-
house contractor personnel, these personnel need to contact the responsible packaging activity to
ascertain requisite packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activity within the Military Department or Defense Agency,
or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory.)
6.1 Intended use. The JP-4 and JP-5 fuels covered by this specification are intended for use
in aircraft turbine engines. These fuels require military unique additives that are necessary in
military weapon systems. This requirement is unique to military aircraft, engine designs, and
missions. Additionally, JP-5 is a military-unique fuel because it is required to have a
substantially higher flash point than commercial aviation turbine fuels for shipboard safety. It is
stored in large quantities on aircraft carriers and other vessels. The flash point is for safety in
these military unique applications.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification
b. Grade of fuel required (see 1.2)
c. Information concerning the type and amount of each additive used (see 3.3)
d. Location and injection method of the corrosion inhibitor/lubricity improver (see 3.3.3)
e. Location and injection method of the fuel system icing inhibitor (see 3.3.4)
f Location and injection method of the static dissipater additive for JP-4 only (see 3.3.5)
g. Quantity required and size containers desired
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