MIL-DTL-8794F
4.8 Performance.
4.8.1 Visual inspection. Hose and hose assemblies shall be examined to ensure conformance with
this specification and associated specification sheets. Hose and hose assemblies shall be examined to
verify that the design, construction and physical dimensions are in accordance with the applicable
requirements. Continuous examination shall be performed to assure compliance with the following
requirements:
Design, construction, materials, and physical dimensions (see 3.3).
a.
b.
Marking (see 3.6)
Workmanship (see 3.7)
c.
d.
Age limit (see 3.8)
4.8.2 Tensile (tension) properties (see 3.5.1.1). Samples of the hose cover and tube when subjected
to the tensile (tension) test in accordance with ASTM D380 shall meet the requirements of 3.5.1.1.
tested for adhesion and shall meet the requirements of 3.5.1.2. The following details shall apply:
a. The adhesion test is applicable for hose sizes -12 through -48 only.
b. Verification of adhesion for hose sizes smaller than -12 may be accomplished on the basis of
similarity to larger sizes.
c. An unaged and an oil-aged (see 4.7.1.2) hose specimen shall be tested for adhesion between
the synthetic rubber tube and inner layer of reinforcing material, and between the inner and
outer layer of reinforcing material, in accordance with the machine method of ASTM D413
using a type A specimen.
d. The oil-aged strip specimen shall be tested for adhesion within one hour after removal from
the oil-aging fluid.
4.8.4 Water and alcohol resistance (see 3.5.2.1). Inner tube specimens when subjected to the water
and alcohol resistance test in accordance with FED-STD-601, method 6121, shall meet the requirements
of 3.5.2.1. The following details shall apply:
a. Test specimens shall immersed in a solution of half alcohol and half water at a temperature of
+158°F ± 5°F (70°F ± 5°C) for 24 hours.
b. The tensile strength shall be measured within 15 minutes after removal from the solution.
4.8.5 Fuel resistance test (synthetic rubber tube) (see 3.5.2.2). The synthetic rubber tube when
subjected to immersion testing in accordance with ASTM D380 shall meet the requirements of 3.5.2.2.
The following details shall apply:
a. The strength deterioration test samples shall be tested in accordance with ASTM D380,
except that the test specimens shall be immersed in fuel conforming to ASTM D471,
ASTM reference fuel B, for 72 hours at room temperature.
b. The tensile strength and elongation shall be measured within 5 minutes after removal from the
test fluid (see 3.5.2.2).
c. Specimens of the synthetic rubber tube shall be subjected to the swelling tests in accordance
with FED-STD-601, method 6211, except that the specimens shall be immersed for 72 hours
at room temperature in fuel conforming to ASTM D471, ASTM reference fuel B, and the
volume increase shall be measured within 5 minutes after removal from the test fluid.
d. Specimens shall be dissected longitudinally, and any indication of disintegration such as ply
separation, solubility of component parts, porosity, blistering, or collapse shall be cause for
rejection.
18
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business