NOTE: The chemical feed solution to be used shall
be inserted here.
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Construct baskets of a corrosion resistant material suitable for continuous
immersion in a [_____] solution.
2.9.9.5
Tank Strainer
Install tank strainer in suction line to pump.
2.9.9.6
Supporting Steelwork
Provide supporting steelwork to adequately support tank, mixer, and the
number of proportioning pumps specified.
2.9.9.7
Agitator
Provide an agitator with mounting bracket to mount to storage tank.
Agitator shaft and propeller shall be of stainless steel.
2.9.9.8
Proportioning Pumps
Provide [two] [three] [_____] proportioning pump[s] of the [simplex]
[duplex] type. Each pump shall have a minimum capacity of [_____] L/s
gallons per hour at a [_____] kPa (gage) psig discharge pressure. Capacity
shall be adjustable from zero to 100 percent by a convenient screw
adjustment of stroke length. Provide pump with integral check valves.
Electric motors shall be [totally enclosed], [fan cooled], [_____] volts,
[_____] phase, 60 Hz as specified under paragraph entitled "Motors and
Drives" in this section.
2.9.9.9
Safety Relief Valve
Provide safety relief valve for each pump to discharge back into the tank
in event of excessive line pressure.
2.9.10
Blowdown Tank
Provide a welded blowdown tank in accordance with NBBPVI NB-27,
(supplemental to the National Board Inspection Code) latest edition
published by the National Board of Boiler and Pressure Vessel Inspectors,
Columbus, Ohio.
2.9.10.1
Construction
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NOTE: The volume of the blowdown tank shall be
calculated to be twice the volume of water removed
from one boiler when the normal water level is
reduced not less than 100 mm 4 inches.
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Construct equipment and accessories in accordance with the requirements of
the ASME BPVC SEC VIII D1 for a working pressure of at least the maximum
allowable working pressure of the boiler but in no case shall the plate
thickness be less than 10 mm 3/8 inch. Provide corrosion allowance of
[2.54 mm] [0.1 inch] [_____]. Tank dimensions shall be [_____] meters feet
[_____] mm inches O.D. by [_____] meters feet [_____] mm inches long over
SECTION 15511N
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