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MIL-P-19131(SHIPS)
4.2.4 Qualification tests shall be conducted to determine that erformance
p
and design of the pumps are in compliance with this specification. The pressure,
capacity, and other characteristics of the unit for the qualification test shall be
as arranged between the Bureau of Ships and the exhibitor.
4.2.5 Separate qualification tests will be required on vertical and on hori-
zontal units of each type, except that qualification granted on vertical design may
be extended also to cover horizontal design at the discretion of the Bureau of
Ships.
4.2.6 Units submitted for qualification test shall be operated at the maximum
rubbing speed for which the unit is designed. Approval of a design of pump oper-
ating at a rubbing speed greater than that at which the tested unit operated on
qualification approval test will not be given without an additional life test
(see 3.3.17 and 4.2.8.1). The life test specified in 4.2.8.1 is intended to demon-
strate the reliability of the type.
4.2.7 Unless otherwise arranged between the Government and the exhibitor,
the pump for the qualification test shall be furnished complete with a prime mover
and necessary accessories. The prime mover need not be made to Government
specifications however, see (4. 3.10. 3). Qualification of a pump does not include
qualification of the driver.
4.2.8 The following tests, in the order listed, shall be made to determine
qualification:
(a) Performance tests to demonstrate the ability of the pump to
operate at the design characteristics (see 4.2. 4). Suffi-
cient data shall be taken during these tests to prepare pump
characteristic curves as specified in 4.3.5, except that
curves of capacity versus power input to the driving unit, as
specified in 4.3, 5 (e), will not be required.
(b) Additional operating runs under conditions to be selected by
the Bureau of Ships to determine:
(1) Volumetric efficiency, (2) mechanical efficiency and
(3) capacity, at varying speed.
(c) Dismantle pump and measure all parts subject to wear and
erosion.
(d) Life test (see 4.2.8.1).
(e) Dismantle pump to measure extent of wear and erosion and to
note general condition of pump.
(f) Duplicate runs under (a) and (b) to determine loss of volumetric
efficiency, mechanical efficiency and capacity due to wear
(see 4.2.8. 2).
(g) Shock test (see 4.3.10.1).
26

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