MIL-PRF-370J
column of the table shall be the minimum level for acceptability. Test procedures as listed in the
ASTM column shall be used as augmented or modified by the noted test paragraphs.
TABLE III. Hose physical and chemical properties.
Hose type
Test method
Physical properties
Requirements
ABCD
ASTM
Test
Tensile strength, original:
Tube -
XXXX
1250 psi, minimum
D412
4.3.6.1
XX
X
1250 psi, minimum
Cover -
X
1000 psi, minimum
Tensile strength, after
immersion in:
Minimum of 40% of original,
Fuel -
XXXX
D471
4.3.6.2
or 600 psi
Minimum of 40% of original,
Water (for 14 days) -
X
or 600 psi
D471
4.3.6.2.1
Minimum of 25% of original,
Water (for 42 days) -
X
or 300 psi
Ultimate elongation, original X X
X
200%, minimum
D412
4.3.6.1
X
400 % minimum
Ultimate elongation, after
immersion in:
Fuel -
XX
X
100%, minimum
D471
4.3.6.2
X
200%, minimum
Water (for 14 days) -
X
40% of original, minimum
D471
4.3.6.2.1
Water (for 42 days) -
X
25% of original, minimum
Volume increase, after
immersion:
XX
X
60%, maximum
Tube -
X
40%, maximum
D471
4.3.6.2
XX
X
100%, maximum
Cover -
X
70%, maximum
Adhesion between
reinforcement and:
Tube -
XXXX
10 lbf/in 1/, minimum
D413
4.3.6.3.1
Cover -
XXXX
10 lbf/in, minimum
Adhesion after immersion in
fuel
Tube/reinforcement -
XX
X
6 lbf/in, minimum
D413
4.3.6.3.2
Cover/reinforcement -
XX
X
6 lbf/in, minimum
8
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