regulator. Heater shall be supplied with electric blower for furnishing
combustion air to the burner and with all other controls and accessories as
recommended by the heater manufacturer for a complete installation, and
shall comply with ANSI Z83.6 and UL 795.
2.29.10.2
Electric Infrared Radiant Heaters
Electric infrared radiant heaters shall be weatherproof car thawing
equipment with radiating surfaces of alloy tubing enclosing electrically
insulated conductors. The equipment shall be in modular lengths suitable
for both 45 and 90 metric tons 50 and 100 tons capacity cars and shall be
designed for [manual] [automatic] disconnection of units not required
during thawing operations. Car heaters shall include sidecar or undercar
heating banks, or both, capable of operating as independent units designed
for maintaining a balanced three-phase distribution system. Heaters shall
have heating conductor units, including factory assembled connections for
attachment to water-tight terminal boxes, supported on corrosion-resistant
metal framing and shall have rust-resistant steel reflectors with an
approved coating. Heaters and connections shall be wired using NEMA 4
enclosures, in accordance with NEMA ICS 1, suitable for cleaning by hosing
down with water.
2.29.11
Coal Spouts, Chutes, Inlet Boxes, and Outlet Hoppers
Coal spouts, chutes, inlet boxes, and outlet hoppers shall be constructed
of ASTM A 36/A 36M steel members not lighter than 3.416 mm 10 gauge,
adequately reinforced and braced with angle frames, and with all joints
dust tight. Slopes shall be as steep as possible, but not less than 55
degrees off horizontal. Liners shall be stainless steel or ultra-high
molecular weight polyethylene (UHMWP). If UHMWP liners are used, each side
of chute at each floor level shall be provided with a warning sign "DANGER
DO NOT WELD - FLAMMABLE PLASTIC LINER." Impact liners shall also be used.
Access openings and inspection openings with cover plates shall be provided
as indicated and required. [Silo frames shall be constructed of heavy
channel frames the full size of the silo opening and shall be provided with
concealed steam pipe and coil around opening.] [Outlet hoppers shall be
provided with rack-and-pinion type gates and shall be lined with austenitic
stainless steel [_____] mm inches thick, conforming to ASTM A 167, Type
304L]. Rack-and-pinion gates shall be of the type specified for track
hoppers.
2.29.12
Car Spotter
Car spotter shall be electric-motor driven having a capstan mounted
vertically on a rigid housing that completely encloses the gears. The
gears shall include helical gears and worm gear; the helical gears shall be
fabricated of high grade steel accurately finished and splash-lubricated,
and the worm gear shall be fabricated of bronze. All of the mechanism
shall be mounted on a steel base rigidly welded to maintain alignment. The
unit shall be coupled to, and driven by, a separate, [_____] W hp, totally
enclosed, nonventilated, hoist-type motor with a full-load speed of 1720
rpm. The coupling shall be roller-chain flexible type enclosed in a
revolving casing and protected by a heavy steel guard. The unit shall have
a starting pull of 22 kN 5000 pounds, a running pull of 11 kN 2500 pounds,
and an average rope speed not in excess of 230 mm/sec 45 fpm. The unit
shall be complete with [_____] m feet of [32 mm 1-1/4 inch diameter manila
rope with a breaking strength of 60 kN 13,500 pounds, minimum,] [20 mm 3/4
inch diameter marline-covered standard steel wire rope with a breaking
strength of 170 kN 37,600 pounds, minimum,] and a steel car pulling hook
SECTION 15559A
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