MIL-DTL-17902G(SH)
4.3.2.2 Sampling for all other tests. With each 100 hose assemblies, or less, offered for conformance
inspection, samples shall be furnished in accordance with table X.
TABLE X. Sampling for all other tests.
Test 2/
Test
Requirement
Test
ASTM standard
sample
Tube thickness
a
ASTM D380
Cover thickness
a
ASTM D380
Hose weight
a
---
Burst pressure
a
ASTM D380
Vacuum 1/
a
ASTM D380
Low temperature flexibility
a
ASTM D471
Cleanliness
a
ASTM D471 and ASTM D2276
NOTES:
1/
For Type NC hose only.
2/
Sample selection shall be in accordance with the following:
a. One hose assembly shall be provided in addition to the quantity required for delivery. This hose
assembly shall be taken at random for the tests specified in table X.
b. Vulcanized samples, 6 by 6 inches by 0.080±0.005 inch in thickness of the friction and filler compounds
used to impregnate the reinforcement and surround the wire helix, or both, shall be provided for the test specified
c. A straight 6-foot length of the helix wire used in the hose offered for conformance inspection for the tests
specified in table X.
4.4 Visual and dimensional examination. Each of the sample hose assemblies selected in accordance with 4.3.1
shall be examined to verify conformance to the requirements of this specification regarding all parts of the hose
assembly which do not involve tests. Visual defects shall be determined and evaluated in accordance with
FED-STD-162. Length, outside diameter, and inside diameter shall be determined as specified in 4.5.1. Weight
shall be determined as specified in 4.5.2. Overall workmanship shall observe the requirements of paragraph 3.11.
4.5 Test methods.
4.5.1 Dimensions of hose. The procedure specified in ASTM D380 shall be used to determine the inside
diameter, outside diameter, tube thickness, cover thickness, and length of the hose. Inside diameter, outside
diameter, and length shall be measured on each of the sample hose assemblies selected in accordance with 4.3.2.2.
Tube thickness and cover thickness shall be measured at six points equally spaced along the length of the sample
hose selected in accordance with table X. Each point shall be spaced 60 degrees apart around the circumference.
The thickness values found shall not be averaged. Each thickness value shall conform to the requirements specified
in table VI.
4.5.2 Weight of hose. The weight of each sample hose assembly, complete with couplings, selected in
accordance with 4.3.2.2, shall be determined with a precision of ±0.5 percent and shall conform to the requirements
of table VI.
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