MIL-DTL-27516G
4.6.11 Environmental vacuum (see 3.5.11). A hose assembly shall be subjected to environmental
vacuum tests and shall meet the requirements of 3.5.11. The following details shall apply.
a. One hose assembly of each size hose being procured shall be completely filled with fluid in
accordance with ASTM D471, reference fuel B, and then held at atmospheric pressure and
temperature for 7 days.
b. At the end of this period, the hose assembly shall then be subjected to the following vacuum
cycling:
(1). Apply 15 inches mercury (Hg) vacuum to the hose assembly and hold for not less than 5
minutes.
(2). Release the vacuum to approximately zero gage.
(3). Repeat "a" and "b" every 7 minutes until 500 cycles have been completed. The number
of cycles recorded shall be cumulative. The test may be run continuously or intermittently.
4.6.12 Ozone resistance (see 3.5.12). Cover specimens shall be ozone resistant tested and shall
meet the requirements of 3.5.12. The following details shall apply:
a. Specimens from the cover shall be tested in accordance with ASTM D1149 method B
procedure B2.
b. After conditioning for 24 hours in an ozone free atmosphere, the specimens shall then be
exposed for 72 hours at 104 ± 2°F (40°C ± 1.1°C) in an atmosphere containing 50 parts per
hundred million of ozone.
4.6.13 Sediment and fuel color change (see 3.5.13). A hose shall be subjected to fuel color change
and shall meet the requirements of 3.5.13. The following details shall apply:
a. A hose, of sufficient length to contain at least 4 liters of fluid, shall be filled with fuel in
accordance with ASTM D471, reference fuel B, capped or plugged and then permitted to stand
for 72 hours with agitation at 24 and 48 hours.
b. The fuel used shall contain no more than 1 milligram per liter of sediment contamination.
c. After the 72-hour period, fuel drawn from the center section of the hose length shall be tested in
accordance with ASTM D156.
d. The fuel color before and after the 72-hour period shall be determined in accordance with
ASTM D156 and shall not exceed a change of 40.
e. A 1-liter sample of fuel shall be obtained and analyzed for solid contamination in accordance
with ASTM D2276.
f. If the total rise in sediment exceeds 2 milligrams per liter, it shall be cause for rejection.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of material is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activity
within the Military Service or Defense Agency, or within the Military Service's System Commands.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
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