MIL-DTL-17505F
4.7.15 Adhesion after filling. A 12-inch (305 mm) length of the hose shall be suitablystoppered
and filled with aromatic hydrocarbon fluid conforming to ASTM D 471 reference fuel B, and
maintained at a temperature of + 75 °F, ± 5 °F (+ 23 °C, ± 3 °C) for 48 hours. Ring specimens,
as described in ASTM D 413, shall be cut from the 12-inch (305 mm) piece of hose and tested in
accordance with ASTM D 413 (machine method) within 15 minutes after the removal of the test
fluid. Nonconformance to 3.12 shall constitute failure of this test.
4.7.16 Nonvolatile extractable material.
4.7.16.1 Test specimen. Each specimen shall consist of strips about 0.063-inch (2 mm) square by
2 inches (51 mm) long, totaling about 5 grams in weight, cut from buffed pieces of the tube of the
hose.
4.7.16.2 Procedure. The specimens shall be weighed and placed in an extraction thimble in the
block tin condenser extraction apparatus shown in ASTM D 297, figure 1. One hundred
millilitre (mL) of ASTM reference fuel A of ASTM D 471 shall be added to the flask. The
specimen shall be extracted for 46 ± 0.50 hours at such a rate that 2.50 to 3.50 minutes are
required to fill and empty the extraction cup. The extract shall be poured into a weighed
container. The specimen and flask shall be rinsed with 25 mL of fresh fuel A and the wash added
to the extract. The nonvolatile residue shall be determined from the extract according to ASTM
D 381, except that the evaporation time shall be 45 minutes. The weight of the residue shall be
expressed as percent of the original weight of the specimen. The test shall be performed in
duplicate and results averaged.
4.7.17 Phosphate plasticizer test. Phosphate plasticizer shall be determined qualitatively in
accordance with method 15825 of FED-STD-601. Use a small piece of clean sodium about the
size of a pea, a test tube about 3 inches (76 mm) long, and the specimens of the residue remaining
after the nonvolatile extractable material test as specified in 4.5.16. The procedure shall be
repeated if phosphorus is found, omitting addition of the nonvolatile extractable material in order
to determine whether phosphorus was present in any form in any of the reagents used.
4.7.17.1 Phosphate plasticizer test, alternate method. An alternate method for determining
phosphate plasticizer qualitatively shall be in accordance with ASTM D 2702. Use the specimen
of residue remaining after the nonvolatile extractable material test as specified in 4.7.16. The
procedure shall be repeated if phosphorus is found, omitting the addition of the nonvolatile
extractable material in order to determine whether phosphorus was present in any form in any of
the reagents used.
4.7.18 Helix wire.
4.7.18.1 Tensile strength. The tensile strength of the wire shall be determined in accordance with
ASTM E 8.
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