shall comply with the applicable requirements of the ASME Boiler and
Pressure Vessel Code. Components shall conform to the following:
2.2.6.1
Boiler Blowoff Valve
Provide flanged [Class 250 cast iron] [Class 300 cast steel] body,
seatless, sliding plunger type valves mounted in tandem at each boiler
blowoff connection.
a.
Steel gate, globe and angle valves:
ASME B16.34.
b.
Safety, relief, and safety relief valves:
2.2.6.2
Steam Gage
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NOTE: Select gage scale to operate within the
middle third of the range.
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Provide a 300 mm 12 inch diameter indicating steam gage with chromium
plated trim and zero to [_____] kPa (gage) psig scale.
Gage shall be
complete with syphon, valve, piping, and fittings to properly connect same.
Gage shall be flush mounted on a 368 mm 14 1/2 inch square by 5 mm 3/16
inch thick steel plate. Provide plugged tee connection for connection to
remote steam gage.
2.2.6.3
Water Column
Provide a safety water column with high and low water alarm suitable for
the design pressure of the boiler. Column shall be complete with
three-chain-operated gage cocks, heavy duty inclined gage glass, and
quick-closing water gage valves having cross levers and chains operated
from floor. Gage glass shall be readable from any point directly below
unit. Make connections to water column from boiler with extra strong steel
pipe and forged steel fittings. Provide crosses instead of tees or elbows,
with screwed plugs in open ends. Terminate bottom of water column and
water column gage glass with plug-in type valves accessible from operating
floor. Provide plugged, screw-in type connections in water column piping
to accommodate a remote level indicator. Provide gate valves immediately
below water column and gage glass. Provide a suitable lamp fixture to
illuminate water column.
2.2.6.4
Safety Valves
Provide not less than [_____] cast steel or cast iron body high capacity
safety valves to give a total steam relieving capacity in accordance with
the ASME BPVC SEC I requirements as to total boiler and water wall heating
surface. Valves shall be set with a set pressure of [_____] kPa (gage) psig,
[_____ kPa (gage) psig] [,_____ kPa (gage) psig] [and kPa (gage) psig]
respectively. Valves shall have flanged inlet and outlet connections.
2.2.6.5
Non-Return Valve
Provide a non-return valve on each boiler steam outlet. The valve shall be
a stop check angle body valve, flanged, Class 250 cast iron or Class 300
steel body with handwheel shutoff, pressure operated disc and external
equalizer. The assembly for manual operation shall be outside screw and
yoke type.
SECTION 15502N
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