MIL-DTL-83054C
3.2 Materials. The raw materials used in processing the baffle and inerting material shall be of the
highest quality and standards for commercially available products of this type and shall be of the same
formulation as that used in the qualification sample. The end product shall be a flexible urethane foam
which is suitable for use in aircraft fuel tanks.
3.2.1 Thermal decomposition. Product toxicological properties relating to thermal decomposition shall
be kept to a minimum as to not impose any use restrictions dealing with the safety of personnel.
3.2.2 Tracer element. A tracer element shall be incorporated into the foam formulation of each vendor
for identification purposes. The tracer element selected shall be unique to each vendor and shall have a
test procedure to identify it.
3.3 Age. The maximum time of delivery from the manufacturer shall not exceed 1 year. If the time
since manufacture exceeds 6 months, the baffle and inerting material shall be inspected, and there shall
be no evidence of discoloration resulting in surface deterioration. Discoloration of urethane foams with
age and exposure to ultraviolet light is a normal occurrence and does not necessarily indicate
deterioration.
3.4 Coloring pigments. Coloring pigments shall not be readily extractable when the baffle and inerting
material is used in contact with fuels conforming to ASTM-D910, MIL-DTL-5624, and MIL-DTL-
83133.
3.5 Infrared spectrum analysis. An infrared spectrum analysis shall be performed as specified (see
4.6.22) to characterize (identify) the baffle material.
3.6 Physical properties and characteristics. The physical properties and characteristics of the baffle
inerting material shall be in accordance with table 1.
3.7 Performance.
3.7.1 Fluid immersion. The fluid immersion shall be as specified (see 4.6.17). The baffle material shall
not have more than 30% loss in dry tension properties after 8 weeks exposure or more than 50% loss
after 24 weeks exposure to grade JP-4 turbine fuel conforming to MIL-DTL-5624 at 160°F (71.l°C).
In addition, the type IV and V baffle and inerting materials shall not have more than 60% loss in wet
tension properties after 24 weeks exposure at 160° +5°F (71.1° +2.8°C) to grade JP-5 turbine fuel.
When exposed to grade JP-5 turbine fuel at 200°F (93.3°C) for a period of 4 weeks, the baffle and
inerting material shall not have more than 30% loss in dry tension properties. When exposed to grade
JP-4 turbine fuel at 75° +5°F (23.9° +2.8°C) for a period of 4 weeks, types IV and V baffle and
inerting material shall not have more than 60% loss in wet tensile strength, compression load deflection,
elongation, and tear resistance as specified (see 4.6.17 f.).
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