MIL-DTL-26894D
TABLE I. Test methods.
Requirement
Requirement Paragraph
Test Method Paragraph
Length change
3.4.1
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Adhesion between tube & adjacent parts
3.4.2
4.4.3
Abrasion resistance of the cover
3.4.3
4.4.4
Burst resistance
3.4.4
4.4.5
Low temperature flexibility
3.4.5
4.4.6
Low temperature bend
3.4.6
4.4.7
Volume increase
3.4.7
4.4.8
Tensile strength
3.4.8
4.4.9
Ultimate elongation
3.4.9
4.4.9
Pull resistance
3.4.10
4.4.10
Crush resistance
3.4.11
4.4.11
Proof pressure
3.4.12
4.4.12
Surge pressure cycling
3.4.13
4.4.13
4.4.3 Adhesion between tube and adjacent parts. A 12-inch length of hose shall be
stoppered with leakproof plugs and filled with the mixed hydrocarbon fluid specified in table II.
The filled specimen shall be held at 75 ±5°F for 72 hours. Within 15 minutes after removal of
the fluid, ring specimens shall be obtained from the center of the hose length and tested in
accordance with ASTM D413. Conformance shall be as specified in 3.4.2.
TABLE II. Hydrocarbon fluid composition.
Volume percentage at 60°F
Ingredient
Iso-octane (2,2,4 trimethylpentane) 1/
70
Toluene 2/
30
1/ Fluid shall conform to ASTM Manual of Engine Test Methods for Rating Fuels.
2/ Fluid shall conform to TT-T-548.
4.4.4 Abrasion resistance of the cover. Samples shall be tested in accordance with
ISO4649, method A. Conformance shall be as specified in 3.4.3.
4.4.5 Burst resistance. Testing shall be conducted in accordance with ASTM D380.
Application of hydraulic pressure shall be not less than 700 psi. Conformance shall be as
specified in 3.4.4.
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