MIL-DTL-17902G(SH)
3.3.2 Physical properties.
3.3.2.1 Physical properties of the hose. The hose shall meet the physical properties specified in table VI.
TABLE VI. Physical properties of hose.
Hose type
CC
NC
Physical property
Test
Size
Size
B
A
B
Inside diameter (in) ±0.063
2½
1½
2½
3⅛
2⅛
3⅛
Outside diameter (in) ±0.063
Tube thickness (in), min.
0.063
0.063
0.063
Cover thickness (in), min.
0.063
0.094
0.094
Hose length (ft), nominal
50
50
50
Hose weight (lbs), max.
100
85
125
Proof test pressure (psi), min.
300
300
250
Burst test pressure (psi), min.
600
600
500
Vacuum (in Hg), Type NC only
22
22
Flattening test, Type CC only (cycles)
100,000
3.3.2.2 Physical properties of rubber components. The rubber components of the hose shall meet the physical
TABLE VII. Physical properties of rubber components.
Requirements
Properties
Test
Friction compound on
Tube
Cover
reinforcement plies
Initial properties:
Tensile strength (psi), min.
2600
1800
Ultimate elongation (%), min.
300
300
Adhesion, minimum, pounds per inch width:
Between tube and breaker ply
20
Between cover and reinforcement ply
15
Between reinforcement plies and filler on
15
wire helix
Properties after immersion in medium no. 6:
Tensile strength (psi), min.
1400
800
Ultimate elongation (%), min.
200
150
Adhesion, minimum, pounds per inch width:
Between tube and breaker ply
12
Between cover and reinforcement ply
8
Volume increase (%), max. (no shrinkage
30
30
30
allowed)
6
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