the combustion source, in case of low water, high or low pressure, power
failure, or control failure. The system shall act automatically.
2.3.13
A calorimeter connection shall be provided in the steam main and a flange
nozzle shall be provided between the stop gate and the nonreturn valve to
permit release to atmosphere when testing the boiler at maximum capacity.
The flanged nozzle shall be equipped with blind flange and gaskets.
2.4
CONDENSATE TANK AND ACCESSORIES
2.4.1
Condensate Tank
Condensate tank shall be designed for a working pressure of 103 kPa 15 psig
and shall conform to ASME BPVC SEC VIII D1. Tank shall have a storage
capacity equal to or greater than indicated and shall be installed complete
with all piping and accessories. Condensate tank shall be factory primed
with the manufacturer's standard paint.
2.4.2
Feedwater Makeup Valve
A float-controlled valve shall be provided for emergency feedwater makeup
to the tank. Valve shall be operated by a float-control mechanism
connected to the surge tank and shall maintain a suitable minimum water
level in the tank. Float box shall be outside the tank and the connections
shall be properly valved to permit blowdown and servicing.
2.4.3
Overflow Trap
An overflow trap designed for the service shall be installed with the
condensate tank. The trap shall operate to prevent the water level in the
surge tank from rising above a predetermined point by automatically
discharging the excess water and shall be designed to prevent the escape of
steam and air.
2.4.4
Tank Connection and Controls
Tank shall be provided with all necessary threaded and flanged openings for
condensate return, 300 x 400 mm 12 x 16 inch (minimum) access manhole,
overflow, drain, pump suction, gauge glass with cocks and drains, and other
openings as required. Tank shall be provided with a low-level alarm and
pump shutoff and high-level alarm. Alarms shall consist of an alarm horn
and warning lights mounted on the control panel as specified.
2.4.5
Design Conditions
The design conditions are:
a.
Tank Capacity (Normal-1/2 capacity)
[_____] liters.
b.
Tank Capacity (Design to overflow)
[_____] liters.
c.
Condensate Temperature
16 to 99 degrees C.
d.
Tank Operating Pressure
Atmospheric.
e.
Tank Outlet Capacity (operating)
[_____] kg per hour.
SECTION 15846A
Page 39
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