MIL-DTL-5624V
3/
ASTM D2887 shall be used for JP-5 fuel only. Distillation property criteria are specified in
ASTM D86 scale units. ASTM D2887 results shall be converted to estimated ASTM D86
results by application of the correlation in Appendix X4 of ASTM D2887 for comparison
with the specified property criteria. Distillation residue and loss limits provide control of the
distillation process during the ASTM D86 test method and do not apply to ASTM D2887.
4/
ASTM D3828 may give results up to 1.7° C below the ASTM D93 results. ASTM D56 may
give results up to 1° C below the ASTM D93 results.
5/
When using ASTM D5191 for vapor pressure determination of JP-4, the quality control
checks, section 10, shall be performed each day using two control samples as the reference
pure materials. The first control sample shall have a vapor pressure between 7 and 14 kPa
and the second control sample shall have a vapor pressure between 21 and 23 kPa.
6/
For JP-4, ASTM D5972 may produce a higher freezing point result than that determined by
ASTM D2386. In case of dispute, ASTM D2386 shall be the referee test method.
7/
Mid-boiling temperatures may be obtained by either ASTM D86 or ASTM D2887 to perform
the Cetane Index calculation. If ASTM D86 values are used, they shall be corrected to
standard barometric pressure.
8/
ASTM D3343, ASTM D3701, or ASTM D7171 may be used to measure hydrogen content of
JP-4, but when measuring hydrogen content of JP-5, only ASTM D3701 and ASTM D7171
shall be used.
9/
See 4.3.2.1 for ASTM D3241 test conditions and procedures.
10/
If the visual rating of the heater tube shows peacock (P) or Abnormal (A) type deposits, the
fuel sample is not acceptable.
11/
The preferred vaporizing medium for aviation turbine fuel is steam, however, the existent
gum test IP 540 may be performed using air as the vaporizing medium. If air is used instead
of steam, it shall be recorded. In case of a failure with air, the sample shall be retested using
steam. Test Method ASTM D381, using steam jet operating conditions, shall be the referee
test method.
12/
A minimum sample size of 3.785 liters (1 gallon) shall be filtered. Filtration time shall be
determined in accordance with the procedure in Appendix A of this specification. The
procedure in Appendix A may also be used for the determination of particulate matter as an
alternate to ASTM D2276 or ASTM D5452.
13/
The flow reducer ring of Appendix A of this specification, A.3.c, is not required for JP-5.
14/
The minimum microseparometer rating using a Micro-Separometer (MSEP) shall be as
specified in Table III.
TABLE III. Micro-separometer rating.
MSEP Rating,
Product
Additives*
min
Antioxidant (AO)*,
JP-4 and JP-5
90
Metal Deactivator (MDA)*
AO*, MDA*, and Fuel System
JP-4 and JP-5
85
Icing Inhibitor (FSII)
AO*, MDA*, and Corrosion
JP-4 and JP-5
80
Inhibitor/Lubricity Improver (CI/LI)
AO*, MDA*, CI/LI, and FSII
JP-4 and JP-5
70
11
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