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|  MIL-R-24414D( SH)
4.7
Tests.
.
4.7.1
Operating
Assembled
reels
selected
as
specified in 4.5.2 shall be loaded with hose and operated by hand to test all
functions, fits, clearances and adjustment (see 3.15). The holding brake
operation shall applied successfully not less than three applications.
Pressure tests.
4.7.2
Prior to installation of hose, each reel shall be
4.7.2.1 Hydrostatic tests.
hydrostatically proof-tested to 400 psi. The pressure shall be held for 5 minutes
during which time there shall . be no leakage or other signs of weakness (see
3.3.1).
4.7.2.2 Collapse pressure tests. Each reel shall have hose or hoses,
identical to the hose to be used in service (see 3.2.2), attached and wound on the
reel.
The reels and hose shall be pressurized with water to 240 psi. The
pressure shall be held for 5 minutes.
The pressure shall then be reduced to O psi
and the hose shall be unwound from the reel. The drum shall show no evidence of
Other reel parts
collapse due to the growth or shrinkage of hose under pressure.
shall show no evidence of damage or distortion due to this test.
pressurizedn completion of the collapse
Upo
4.7.3
Operating
test
reel
test (see 4.7.2.2), the reel and hose shall be repressurized as specified in
4.7.2.2 to 175 psi and the hose shall be reeled on and off the reel while under
pressure.
The reel shall operate smoothly with no bending, wobbling or binding
during this test.
4.7.4 Spraytigh tness test.
The type II reel shall be subjected to the
spraytight enclosure test in accordance with MIL-STD-108.
4.7.5 Shock test. The high impact (H.I.) shock tests shall be grade A,
class I, type A in accordance with MIL-S-901.
The reel shall be completely
assembled (including hose), and shall be mounted on the shock machine in a manner
simulating a typical shipboard bulkhead installation.
The number of blows shall
be as specified in MIL-S-901.
Hose used for the H.I. shock test of reels need
only be the same size, weight and length as hose to be used in service. The
reel and hose shall not be pressurized nor filled with water for this test.
4.7.5.1 Examination after shock tests.
The equipment shall be carefully
examined to determine the extent of any damage to the mechanical parts after
completion of the shock test.
Examination of the reels shall determine the
following:
(a) The hose shall be unreeled and then replaced on the reel not less
than five times. Any undue noise or difficulty in operation shall
be investigated and the cause determined.
(b) The fluid handling sections of the reel (between the inlet and
outlet connection) shall be hydrostatically tested to 400 psi.
Pressure shall be held for 5 minutes.
There shall be no leakage
during the hydrostatic test. "
13
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