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Page Title:
Pump pressure regulating governors |
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|  MIL-P-17639F(SH)
Mechanical flareless (bite), compression or flared type fittings are not
permitted.
These materials shall be furnished for fire pumps for the parts indicated:
Titanium
Casing and throat bushing
ASTM
B
367,
grade C-2
Impeller
ASTM
B
367,
grade C-5
Titanium
Casing wearing ring
Titanium
ASTM
B
367,
grade C-2
Shaft sleeves
Titanium
ASTM
B
367,
grade C-5
ASTM
B
446,
UNS N06625
Ni-Cu-Mo-Cb alloy
Shaft
Studs
ASTM
B
367,
grade C-5
Titanium
ASTM
B
367,
grade C-2
Stud nuts
Titanium
Titanium
ASTM
B
367,
grade C-2
Impeller nut and washer
Yield strength at 0.5 percent extension under 18,000
minimum, 48,000
maximum.
3.3.10.1 Recovered materials. Unless otherwise specified herein, all
equipment, material, and articles incorporated in the products covered by this
specification shall be new and may be fabricated using materials produced from
recovered materials to the maximum extent practicable without jeopardizing the
intended use. The term "recovered materials" means materials which have been
collected or recovered from solid waste and reprocessed to become a source of
raw materials, as opposed to virgin raw materials. None of the above shall be
interpreted to mean that the use of used or rebuilt products is allowed under
this specification unless otherwise specifically specified.
3.3.11 Pump pressure regulating governors.
3.3.11.1 Unless otherwise specified (see 6.2.1), one constant pressure
regulating governor in accordance with MIL-G18916 shall be furnished with each
class C-2 turbine-driven pump for fire, or fire and flushing service.
3.3.11.2 Steam pressure drop through pump pressure regulating governors
should be considered when rating turbine-driven pumps.
3.3.12 Part interchangeability. All parts for pumps manufactured to
the same drawings shall be interchangeable.
3.4 Tools. Tools which are available in the Federal Supply Catalog, such
as common wrenches and standard pullers and extractors, will not be required.
Standard complete or limited sets of pullers or extractors or pares of puller
sets in accordance with GGG-P-781 or GGG-E-950 shall be identified as to type
and use in notes on the outline or sectional assembly drawings. Special tools
shall be detailed and included in the list of material. Special tools required
for the maintenance and repair of the pump units shall be furnished. The number
of sets of special tools of the pump units shall be as specified (see 6.2.1).
Special wrenches shall be of forged steel with hardened jaws. Special tools are
defined as those tools not listed in the Federal Supply Catalog (copies of the
catalog may be consulted in the office of the DCASMA).
3.5 Technical data. The contractor shall prepare the following technical
data in accordance with the data ordering documents included in the contract or
order (see 6.2.2) and as specified in 3.6 through 3.10.2.
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