MIL-DTL-20176G
covered by this specification are to be new and fabricated using materials produced from
recovered materials to the maximum extent possible without jeopardizing the intended use. The
term "recovered materials" means materials which have been collected or recovered from solid
waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials.
Unless otherwise specified, none of the above shall be interpreted to mean that the use of used or
rebuilt products is allowed under this specification.
3.3 Construction.
3.3.1 Principal parts. Hose shall consist of the following:
a.
An inner rubber tube (see 3.3.2).
b.
An outer cover (see 3.3.2).
c.
Ply or plies of reinforcement material (see 3.3.3.1).
d.
A helix or helixes of round steel wire (class 1 only) (see 3.3.3.2).
e.
End fittings (see 3.3.4).
3.3.2 Rubber components. Rubber used in the inner tube, outer cover, and friction material shall
meet the physical properties of table I and 3.6.4.
TABLE I. Physical properties of types I and II hose material.
Tube
Reinforcement
Test requirements
Physical properties
and cover
plies
paragraph
Initial properties.
--
4.5.10.1
1400
Tensile strength, pounds per square inch
(9 653 kPa)
(psi) (kilopascal (kPa)).
300
--
4.5.10.1
Ultimate elongation percent minimum.
12
12
4.5.10.5
Adhesion, pounds (lb) (kilogram (kg) per
(83 kg)
(83 kg)
inch (millimetre (mm)) of width, minimum.
Properties after immersion in test fluid.
4.5.10.2
--
1000
Tensile strength, psi (kPa) minimum.
(6 895 kPa)
4.5.10.2
--
150
Ultimate elongation, percent minimum.
4.5.10.4
100
100
Volume increase, percent maximum.
4.5.10.6
9
9
Adhesion, lb (kg) per inch (mm) of
(62 kg)
(62 kg)
width, minimum.
Properties after accelerated aging.
Tensile strength, psi (kPa) minimum.
1200
--
4.5.10.3
(8 274 kPa)
Ultimate elongation, percent minimum.
200
--
4.5.10.3
Ozone resistance, hose cover.
No cracking
4.5.11
4
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