conforming to ASTM A 194/A 194M,
Grade 7. Bolts shall be of sufficient
length to obtain full bearing on
the nuts and shall project not more
than two full threads beyond the
nut. Provide stainless steel
counterbalance type rain caps at
termination of each exhaust pipe.
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NOTE: Select option for liners in expansion joints
when required to reduce exhaust pressure drop.
**************************************************************************
b.
Expansion (Flexible) Joints: Provide sections of multiple corrugated
stainless steel expansion joints[ with liners] in the engine exhaust
piping for each engine to absorb expansion strains and vibration
transmitted to the piping. Flexible joints shall be suitable for
operation at 93 degrees C 200 degrees F above normal exhaust gas
temperature at 100 percent load, 10,000 cycles, minimum. Joints shall
be flanged and located between engine exhaust manifold and exhaust
piping, shall be the same size as exhaust piping size, and shall be
designed and constructed for diesel engine exhaust service.
c.
Hangers and Supports:
MSS SP-58 and MSS SP-69.
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NOTE: Include on the drawings a detail of the
exhaust piping penetrations through walls and roofs
showing the piping sleeve and exterior flashing.
**************************************************************************
d.
Piping Sleeves: Provide where piping passes through masonry or
concrete walls, floors, roofs, and partitions. Sleeves shall be placed
during construction. Unless indicated otherwise, pipe sleeves shall
comply with following requirements: sleeves in outside walls below and
above grade, in floor, or in roof slabs, shall be standard weight zinc
coated steel pipe. Sleeves in partitions shall be zinc coated sheet
steel having a nominal weight of not less than 4.4 kg per square meter
0.90 pound per square foot. Space between piping insulation and the
sleeve shall not be less than 6 mm 0.25 inch. Sleeves shall be held
securely in proper position and location during construction. Sleeves
shall be sufficient length to pass through entire thickness of walls,
partitions, or slabs. Sleeves in floor slabs shall extend 50 mm 2
inches above the finished floor. Space between the pipe and the sleeve
shall be firmly packed with insulation and calked at both ends of the
sleeve with plastic waterproof cement.
e.
Piping Insulation: Provide exhaust piping insulation in accordance
with Section 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS.
]2.2.3
Cooling System
Provide the specified cooling water system. Properly size equipment to
handle the flow rate and pressure losses of the coolant mixture specified
in the paragraph entitled "Diesel Engine Capacity," and at the site
elevation specified in the paragraph entitled "Site Conditions."
2.2.3.1
Radiators
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NOTE: Generally utilize the engine subbase radiator
as the less expensive option. In cases where
SECTION 16237N
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