MIL-DTL-29210E
4.6 Examination. Each hose and hose assembly selected shall be visually and dimensionally
examined to determine conformance to the requirements of this specification not involving tests. The
workmanship of the hose and hose assembly shall meet the requirements of 3.10. The classification of
defects in FED-STD-162 shall be used to determine and evaluate defects through visual inspection.
4.7 Tests. Sample hose sections and metal liner selected shall be subjected to the applicable tests
specified in 4.7.1 through 4.7.3.
4.7.1 Complete hose assembly tests.
4.7.1.1 Hose length measurement (see 3.3). Each hose selected shall be measured for length in
accordance with ASTM D380 to determine conformance to 3.3.
4.7.1.2 Proof pressure (see 3.5.1). Each hose assembly shall be proof pressure tested in
accordance with ASTM D380. The following details shall apply:
a. The hose assembly shall be subjected to the 1250 psig (17 MPa (gauge)) hydrostatic proof
test pressure specified in 3.5.1.
b. Water shall be used as the test media.
c. A vertical (hanging) hydrostatic proof pressure test shall be performed when specified (see
6.2).
d. The proof pressure shall be held for 15 minutes and the hose and fittings examined for
leakage or other evidence of weakness.
e. Individual hose assemblies shall be rejected if they fail to meet the requirements of 3.5.1.
4.7.2 Hose without metal liner tests.
4.7.2.1 Hose size (see 3.4). Hose selected shall have the inside and outside diameter measured in
accordance with ASTM D380 to determine conformance to 3.4.
4.7.2.2 Unit weight (see 3.4). The unit weight of hose selected shall be determined by weighing the
hose without couplings. The readings shall be accurate to the closest tenth of a pound (0.05 kg). The
weight of the hose shall be divided by its length to determine conformance to 3.4.
The following details shall apply:
a. The samples shall be tested in accordance with ASTM D1149 method B procedure B2.
b. After conditioning for 24 hours in an ozone-free atmosphere, the looped specimens shall be
exposed for 336 1.0 hours at 104F 2F (40C 1C) to an ozone concentration of 100
10 parts of ozone per hundred million parts of air by volume.
4.7.2.4 Steam resistance test (see 3.7). A 3-foot (914 mm) hose length sample removed from the
additional 8-foot (2438 mm) hose length submitted with the first article shall be used for the following
steam test:
a. The outer surface of the hose shall be visually examined for imperfections. The inner surface of
the hose shall be examined for surface imperfections by use of a source of light which shall be
held at one end while the hose is looked through from the other end. The condition of the tube
surface shall be recorded.
b. A steam trap shall be installed at the outlet end of the test sample. The trap shall be designed to
keep the pressure at 190 psig min - 210 psig max (1.3 MPa (gauge) min - 1.5 MPa (gauge)) max
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