2.3.6.4
Boiler Supports
Boiler and firing equipment shall be supported from the foundation. Boiler
supports shall be heavy duty structural steel base with lifting lugs and
rigging holes in the skid to facilitate installation. Two (2) or more
lifting lugs shall be located on top of pressure vessel.
2.3.6.5
Refractory
Front boiler door shall be either hinged or davited, as required, to
provide access to firetubes without disconnecting the burner or fuel train.
Front boiler door shall be configured such that front tube sheets are fully
accessible for inspection and cleaning when open. Rear door shall be
davited. "Dry back" boilers having rear door refractory are not
acceptable. Doors shall be sealed with ceramic fiber rope gaskets and
fastened securely using lugs and nuts threaded onto studs welded into the
vessel. Rear door shall be insulated with blanket insulation with a steel
covering. The front door refractory and insulation shall be contained in
the formed door which must swing open for inspection of brick work.
Material Safety Data Sheets (MSDS) detailing refractory materials contained
within the boiler shall be submitted.
2.3.6.6
Boiler Insulation
Boiler insulation shall be minimum 50 mm 2 inch fiberglass blanket covering
entire circumference of pressure vessel and shall be protected by preformed
sheet metal lagging. Insulation shall be covered with minimum 0.8 mm 22
gauge preformed sheet metal and factory painted before shipment using a
hard finish enamel coating.
2.3.7
Boiler Trim
Boiler shall be provided complete with the following trim:
a.
Water column consisting of gauge glass set, gauge glass and water
column blowdown valve.
b.
Low water cutoff, as an integral part of the boiler feedwater
control. Cutoff shall be factory wired into the burner control
circuit to prevent burner operation if the boiler water level
falls below the safe operating level.
c.
An auxiliary low water cutoff shall be mounted below the primary
unit, wired in series with the primary unit, and provided with a
manual reset device.
d.
Steam pressure gauge, range to suit operating pressure, shall be
provided on the boiler front, including syphon, cock and test
connection.
e.
Steam safety valve of type and size to comply with ASME Code
requirements.
f.
Two bottom blowdown connections, one at the bottom front and one
at the bottom rear of the vessel.
g.
A minimum of [_____] surface blowdown connection[s].
SECTION 15561A
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