seals to prevent leakage of lubricant to outside and dust entry to the
inside. Bearings shall have 60,000-hour minimum B10 life under design head
conditions. Provide with adequate lubrication system. Provide with dust
and oiltight seals. Pump shall have no submerged bearings. Provide shaft
seals as specified in paragraph entitled "Vertically Split-Case
Rubber-Lined Pumps." Pump baseplate shall be of fabricated steel, of
adequate size and thickness to prevent excessive vibration and deflection.
Provide holes for mounting of the pump and necessary piping as required.
Baseplate shall be rubber-coated on the bottom side. Provide with shims,
bolts, and other devices required for proper alignment and anchorage.
Anchor bolts required in foundation will be furnished by the Contractor.
Materials of construction shall be as specified below.
Part Name Material
Casing
Cast iron or steel, ASTM A 48M ASTM A 48, rubber
covered
with replaceable rubber liner
Impeller
Soft rubber on steel skeleton
Shaft
Heat-treated carbon, or stainless steel,
ASTM A 276, Type 410
Shaft Sleeve
Stainless Steel, 450 minimum Brinell hardness, or
ceramic
Baseplate Steel,
ASTM A 36/A 36M
2.10.1.5
Factory Test and Reports
Pumps shall be tested for static and dynamic balance of rotating
assemblies, for normal functioning in conformance with the "Standards of
the Hydraulic Institute," and for performance at design conditions. The
pump casing shall be hydrostatically tested at 150 percent of shutoff head.
After completion of shop tests, install new gaskets and tighten all bolts
so that pumps are ready for operation and so that no field disassembly,
cleaning, or flushing is required. Notify the Contracting Officer at least
30 days in advance of tests so that a representative can be present.
2.10.2
Valves and Piping
Piping, valves, and pumps in slurry service shall include provisions for
automatic and manual flushing, complete drainage and cleanout. Pipe drains
shall drain back into a tank. Control and isolating valves and controls
required for flushing operations shall be furnished. Furnish parallel
piping systems to allow for flushing of one pipeline system with continued
operation of the FGD system using the other. A description of provisions
for flushing the piping systems shall be included as part of the system
description. Slurry piping shall utilize flanged joints and long-radius
(600 mm (24 inch minimum) bends. Piping shall be designed for the maximum
operating and start-up pressure and temperature requirements of the
service. Vent and bypass lines or other lines in intermittent service
shall be sized for the available pressure drop. Bypass (recirculation)
lines with control valves sized for the available pressure drop shall be
provided on systems with varying demands as required to protect the pump.
Piping for emergency service only shall be sized as required by the
applicable code or based upon the available pressure drop. Piping systems
shall be arranged to prevent plugging and settling out in lines and valves.
Pipe hangers shall be corrosion-resistant as specified herein. Forces
placed on equipment by piping shall not exceed the manufacturer's allowable
levels. Piping materials and systems shall be compatible with the fluids
handled. Fluid systems shall be designed so that circulation is has a low
SECTION 15864N
Page 60
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