MIL-DTL-81581/6B
3.5.3 Strength.
3.5.3.1 Tensile load. There shall be no indication of separation of the end fittings or
molded ends from the hose assembly when tested as specified in the general specification.
3.5.3.2 Static load. The hose shall not show a deflection of greater than 25 percent of
original value on the outside diameter when tested as specified in the general specification. With
the load removed, the outside diameter of the hose shall be within 5 percent of the original value.
3.5.4 Restraint cord elongation and tensile strength. When the applicable control drawing
specifies a restraint cord, the restraint cord shall have a 30 percent maximum elongation and a
minimum tensile strength of 70 pounds when tested as specified in the general specification.
3.5.5 Interchangeability. All hose assemblies having the same type designation shall be
mechanically and electrically interchangeable with mating parts. The interchangeability shall be
determined by the following tests:
Group IA and IB hose assemblies (Drawing 281AS100).
Leakage
Polarity (color code) and electrical continuity, Procedure I of the general specification
Pressure drop
Flow verification
Group II hose assemblies (Drawing 281AS100).
Leakage
Pressure drop
4.
VERIFICATION
4.1 Sampling and inspection. The sampling and inspection of the hose kit or hose assembly
shall be as specified herein.
4.1.1 Qualification inspection. The following qualification inspections shall be performed
for the applicable hose assemblies: For Group IIIA and IIIB hose kits, the qualification
inspection shall consist of the applicable inspections for the individual hose assemblies of the
hose kit and their respective individual applicable group listed on Drawing 281AS100.
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