located in the air intake system as recommended by the engine manufacturer.
Silencer shall be capable of reducing the noise level at the air intake so
that the indicated pressure levels specified in paragraph SOUND LIMITATIONS
will not be exceeded. A combined filter-silencer unit meeting requirements
for the separate filter and silencer items may be provided. Expansion
elements in air-intake lines shall be [copper] [rubber].
2.8
EXHAUST SYSTEM
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NOTE: Include on the drawings a detail of the
exhaust piping that penetrates construction such as
walls or roof.
**************************************************************************
The system shall be separate and complete for each engine. Piping shall be
supported to minimize vibration. Where a V-type engine is provided, a
V-type connector, with necessary flexible sections and hardware, shall
connect the engine exhaust outlets.
2.8.1
Flexible Sections and Expansion Joints
A flexible section shall be provided at each engine and an expansion joint
at each muffler. Flexible sections and expansion joints shall have flanged
connections. Flexible sections shall be made of convoluted seamless tube
without joints or packing. Expansion joints shall be the bellows type.
Expansion and flexible elements shall be stainless steel suitable for
diesel-engine exhaust gas at the maximum exhaust temperature that is
specified by the engine manufacturer. Expansion and flexible elements
shall be capable of absorbing vibration from the engine and compensation
for thermal expansion and contraction.
2.8.2
Exhaust Muffler
**************************************************************************
NOTE: Muffler locations and mountings should be
shown on the drawings.
**************************************************************************
A chamber type exhaust muffler shall be provided. The muffler shall be
constructed of welded steel and designed for [outside] [inside] [vertical]
[horizontal] mounting. Eyebolts, lugs, flanges, or other items shall be
provided as necessary for support in the location and position indicated.
Pressure drop through the muffler shall not exceed the recommendations of
the engine manufacturer. Outside mufflers shall be zinc coated or painted
with high temperature [_____] degrees resisting paint. The muffler and
exhaust piping together shall reduce the noise level to less than the
maximum acceptable level listed for sound limitations in paragraph SOUND
LIMITATIONS. The muffler shall have a drain valve, nipple, and cap at the
low-point of the muffler.
2.8.3
Exhaust Piping
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NOTE: Exhaust piping will be sized at a gas
velocity of less than 25.4 meters per second (5000
fpm). Piping should be shown on the drawings.
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SECTION 16263A
Page 47
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