MIL-DTL-26521L
3.8.3 Coupling identification. The coupling ferrule shall be permanently identified with the following:
Coupling Manufacturer CAGE Code
Coupling Manufacturer PIN
3.9 Cleanliness. All hose assemblies when inspected in accordance with 4.6.3.13 shall be free from
oil, grease, dirt, moisture, cleaning solvents and other foreign material, both internally and externally.
3.10 Workmanship. All hose and hose assemblies shall be manufactured and processed in such a
manner as to be uniform in quality and shall be free from foreign material and other defects that will affect
life, serviceability, strength, assembly, or durability (see table III). Workmanship shall be such as to
enable the hose and hose assemblies to meet the applicable performance requirements of this
specification.
TABLE III. Workmanship defects.
Requirement
Examination
Inspection
paragraph
Liner workmanship 1/
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Liner not smooth, continuous, free of pitting, blisters,
depressions, grooves, holes, cuts, charge marks, slits, porosity,
Visual
and foreign material
Standard inspection
Liner thickness not as specified
equipment (SIE)
Cover workmanship 1/
Cover material not as specified
SIE
Cover wrong color
Visual
Cover not smooth
Visual
Cover material is not free of cuts, nicks, pitting, blisters, bruises,
depressions, lumps, grooves, holes, cuts, charge marks, slits,
Visual
porosity, sharp edges, and foreign material
Cover thickness not as specified
SIE
Hose assembly workmanship
Fitting slippage on hose
Visual
Damaged, cracked or charred hose
Visual
Cracked, damage or badly corroded fittings
Visual
Kinked, crushed, flattened or twisted hose
Visual
Blistered, soft, degraded or loose covers
Visual
Not within age requirements
Visual
Friction layers not vulcanize properly
Visual
Hose ID not as specified
SIE
Length not as specified
SIE
Couplings not as specified
Visual
Hose identification missing or incorrect
Visual
Coupling identification
Visual
Coupling caps missing
Visual
Cleanliness
Visual
1/ Hose inspections.
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