be shown on the plans. An electric motor-driven fan
is provided on remotely located radiators to
circulate air across the radiator. The fan should
operate when the engine operates.
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Each radiator shall be sized to limit the maximum allowable temperature
rise on the coolant across the engine to that recommended and submitted in
paragraph SUBMITTALS, for the maximum outdoor design temperature and site
elevation. Radiator fabrication materials shall be corrosion resistant and
suitable for service in the ambient application conditions. The radiator
may be factory coated with corrosive resistant film provided that
corrective measures are taken to restore the heat rejection capability of
the radiator to the initial design requirement via over-sizing or other
compensating methods. Internal surfaces shall be compatible with liquid
fluid coolant used. Materials and coolant are subject to approval by the
Contractor Officer. Radiators shall be the pressure type incorporating a
pressure valve, vacuum valve, and a radiator cap. Radiator caps shall
provide for pressure relief prior to removal. Each radiator and the entire
cooling system shall be capable of withstanding a minimum pressure of 48.4
kPa 7 psig. Each radiator shall be protected with a strong grille or
screen guard. Radiators shall have at least two tapped holes. One tapped
hole in the radiator shall be equipped with a drain cock; the rest shall be
plugged.] [The remote located radiator shall be provided with an electric
motor-driven fan. The fan shall be wired to operate when the engine
operates.]
2.5.2.1
[Shell and Tube Heat Exchanger
The heat exchanger shall be a multiple pass shell type with removable
U-tube bundles to facilitate cleaning and retubing. The heat exchanger
shall be of sufficient capacity to cool the engine with [_____] degrees C
degrees F input cooling water. The heat exchanger shall operate with low
temperature water in the shell and high temperature coolant in the tubes.
Exchangers shall be constructed in accordance with requirements of ASME
BPVC SEC VIII D1 and certified with an ASME stamp secured to the heat
exchanger. Shells shall be constructed with seamless steel, welded steel,
or cast iron. Tubes shall be either cupronickel or inhibited admiralty,
meeting requirements of ASTM B 395/B 395M, suitable for the temperature and
pressure specified. The shell side and tube side of the heat exchanger
shall be designed for 1.03 Mpa 150 psig working pressure and factory
tested at 2.06 Mpa 300 psig. High temperature, low temperature, and
pressure relief connections shall be located in accordance with the
manufacturer's standard practice. Coolant pressure loss through clean
tubes shall be as recommended by the engine manufacturer. Minimum coolant
velocity through the tubes shall be at least 300 mm/sec 12 inch/sec and
sufficient to assure turbulent flow. One or more pressure relief valves
shall be provided for each heat exchanger in accordance with ASME BPVC SEC
VIII D1. A drain connection with a 19 mm 3/4 inch hose bib connection
shall be installed at the lowest point in the system near the heat
exchanger.]
2.5.2.2
[Plate and Frame Heat Exchanger
The heat exchanger shall be a multiple pass type with removable plates to
facilitate cleaning. The heat exchanger shall be of sufficient capacity to
cool the engine with [_____] degrees C degrees F input cooling water. Heat
exchangers shall be constructed in accordance with ASME BPVC SEC VIII D1
and certified with an ASME stamp secured to the heat exchanger. Materials
SECTION 15133A
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