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| MIL-P-21343(SHIPS)
4.3.8 The bureau or agency concerned may, when requested, authorize separate tests of the driving
unit and driven unit, at the plants of the different manufacturers, and will accept overall power results
and characteristic curves computed from the results therefrom. This should not be construed in any way
to release the primary contractor from an operating run on one completely assembled unit from each con-
tract. This operating test shall be run with the unit fully loaded and shall demonstrate all requirements of
the specifications as to thrust, governing, balance, and lubrication, at maximum speed.
4.3.9 Complete test reports, including test data on both pumps and driving units, shall be assembled
and distributed as follows:
(a)
Three to the Bureau of Ships (to be forwarded via the coginzant inspector).
(b)
One for primary district inspection office.
(c)
One for branch inspection office (if any).
(d)
Two to each supervisor of shipbuilding (one for supervisor's files, the other
for the shipbuilder).
(e) One to the Commander of each shipbuilding yard concerned, for Navy yard built
ships, when specified in the contract or order.
4.3.10 One complete pumping unit of each type, design and size shall be subjected to the high impact
shock test specified in Specification MIL-S-901 as required by 3.2.8 herein.
4.3.11 Shock tests will be conducted at the manufacturer's plant. Where a manufacturer is unable
to conduct these tests at his own plant, he may arrange to have them conducted at a commercial labora-
tory, or Government laboratory suitably equipped to conduct tests. Where shock tests are conducted at
a Government laboratory, copies of the applicable master drawings shall accompany the units.
4.3.12 Equipment previously accepted will not be resubmitted for shock test except when evidence of
low shock resistance develops in the units installed. The bureau or agency concerned will initiate action
with the manufacturer for correction of deficiencies, and reserves the right to require shock tests at any
time.
4.3.13 All pump units less tachometer shall be shock tested with drivers unless otherwise approved
by the bureau or agency concerned. Pumps shock tested with one driver will not be required to be shock
tested again when supplied with a different driver. Prime movers are subjected to shock tests in accord-
ance with the applicable equipment specification.
4.3.14 One pump of each manufacturer's type and each nominal size shall be subjected to shock tests,
Compliance with shock resistance requirements may be covered by test of a similar unit subject to
approval by the bureau or agency concerned.
4.3.15 The pump unit less tachometer shall be considered to have failed to pass the shock tests in
event of any of the following:
(a) Breakage of any parts, including mounting bolts.
(b) Appreciable distortion or dislocation of any part, such as shaft, mounting
feet, bearings.
(c) A mechanical unbalance of more than two times the amplitude of unbalance
measured prior to tests at rated speed, or more than that permitted by the
specifications for the driver.
4.3.16 Pump units which have been subjected to the high-impact shock test and have failed to conform
to the requirements will not be acceptable.
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