12 feet high with 50 by 50 by 6 mm 2 by 2 by 1/4 inch angle flanges at the
end of each section. Provide a hinged inspection door not less than 610 by
760 mm 24 by 30 inches in the section immediately above the boot section
[and where indicated]. Casing and inspection doors shall be of dust-tight
construction with flange angles continuously welded and gasketed. No
makeshift repairs or field patching to overcome leakage shall be permitted.
Casing interior shall be given a 1.60 mm 1/16 inch thick coating of coal
tar primer and enamel in accordance with SSPC PS 11.01.
2.9.9.6
Head Section
Not less than [_____] mm inch thick commercial hot rolled mild steel plate
in heavy angle frame with split, hinged, and removable top cover hood.
Construct hood of not less than [_____] mm inch thick commercial hot rolled
mild steel plate with flanged discharge throat built of not less than
[_____] mm inch thick commercial hot rolled mild steel plate. Design head
section to support the drive machinery and head bearings. Provide
maintenance access ladder and platform conforming to applicable OSHA
regulations [as indicated].
2.9.9.7
Boot Section
Not less than [_____] mm inch thick commercial hot rolled mild steel plate
in heavy angle frame with curved and renewable bottom plate built of not
less than [_____] mm inch thick commercial hot rolled mild steel plate, and
flanged inlet. Take up and foot terminal bearing on one side of the boot
shall be mounted in a bolted removable side panel so the foot shaft and
[sprocket] [sprockets] may be removed through the side of the door. Bolt
end panels so they are removable for cleanout and inspection.
2.9.9.8
Electric Motor
Totally enclosed, fan cooled, high torque, [_____] volt, three phase, 60 Hz
not less than [_____] kW hp, as specified under paragraph entitled "Motors
and Drives" in this section. Motor shall be direct connected by means of
flexible coupling to a reduction gear.
2.9.9.9
Reduction Gear
Alloy steel herringbone or helical gear type enclosed in oiltight housing.
Provide an adjustable base for motor and reduction gear unit. Drive from
output shaft of reduction gear to elevator head shaft shall be by means of
standard finished steel roller chain conforming to ASME B29.1M running over
cut tooth sprockets conforming to ASME B29.1M and complete with steel plate
chain guard. Roller chain attachments shall conform to ASME B29.1M.
Provide means to properly tension drive chain.
2.9.9.10
Anchoring Brackets
Provide steel brackets at intervals [as indicated] at [not less than [_____]
meters feet over centers] for anchoring elevator and to increase rigidity.
2.9.10
Rotary Vane Feeder
Provide a fully enclosed, dusttight, rotary vane feeder designed to feed
[_____] size coal at a constant rate of not less than [_____] Mg tons per
hour. Provide feeder complete with housing, feeder vanes, removable panels
and inspection doors.
SECTION 15502N
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