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|  MIL-P-18472G(SH)
Packing and gaskets shall be in accordance with
3.2.9 Packing and gaskets.
Drawing B-153. Gasket compression and tolerances shall not affect bearing
bushing or wearing ring fits to an extent that will adversely affect reliability
and performance. Spiral wound gaskets shall be used only where use of a sheet
gasket or O-ring is impracticable. O-rings and spiral wound gaskets shall be
completely enclosed to prevent gasket pieces entering the fluid system.
3.2.10 Threaded fasteners.
Threaded parts, such as bolts, studs, and tap-
bolts, studs, and nuts, shall conform to FED-STD-H28, FED-STD-H28/2, and
MIL-S-1222.
The use of tap-bolts or cap-screws is prohibited unless explicitly
discussed and justified in a submittal to the design review agency and approved
by the design review agency and where the use of through bolts or studs is
impractical. The setting end of the studs shall be class 3 fit with locking
resin in accordance with MIL-S-22473, type AV. The nut end shall be class 3 fit.
The recommendations of the locking resin manufacturer regarding the use of a
primer shall be adhered to. Inspection procedures shall be in accordance with
DOD-STD-1371.
3.2.11
Piping root connecti ons. Root connections for attaching pipes shall
be in accordance with Drawing B-214. Pumps shall be fitted with flanged
connections conforming to Drawing B-214 for suction and discharge pressure gauges
or MS connections in accordance with MS16142, as specified (see 6.2).
3.2.11.1 Pressure gauges. Pressure gauges, when provided with the units,
shall be mounted in accordance with Drawing 810-1385850.
Gauges shall be
positioned for accessibility of reading and maintenance. Gauges shall be secured
on the parent equipment in such a manner as to prevent vibration, breakage, and
disconnection.
3.2.12 Welding and brazing. Welding shall be in accordance with
MIL-STD-278.
Silver brazing is prohibited for casing joints and attachments.
Where silver brazed joints are permitted, such joints shall be in accordance with
NAVSEA 0900-LP-001-7000.
3.2.13 Turbines. Turbines for driving pumps shall be in accordance with
MIL-T-17523 and as specified (see 6.2).
3.2.14 Motors. Motors for driving pumps shall be of the type and charac-
teristics specified (see 6.2), and shall conform to service A requirements in
accordance with MIL-M-17413 for direct current (de) motors and to MIL-M-17060
for alternating current (at) motors. For surface ship applications, motors
shall be totally enclosed fan cooled. For submarines only, complete motor
specification shall be as specified (see 6.2).
3.2.14.1 Speed. Motor rotors for use on dual turbine and motor-driven
pumps shall be constructed and tested for a speed of 25 percent in excess of
rated turbine speed.
3.2.14.2 Horsepower. The horsepower rating of each motor shall be equal to
or greater than the maximum brake horsepower (bhp) of the driven pump under any
condition from shut-off to free delivery. Head-capacity and bhp curve shall
demonstrate that motor is non-overloading at any point. The actual motor rating
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