Steam making; or, Boiler practice by Smith Charles Augustus 1846-1884

Author:Smith, Charles Augustus, 1846-1884
Language: eng
Format: epub, pdf
Tags: Steam-boilers
Publisher: Chicago, American Engineer
Published: 1885-03-25T05:00:00+00:00

INTERNALLY FIRED BOILERS, ETC.

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drical furnace tube of large diameter and short length with back connection and with small return tubes above. According to the size of boiler there are used one, two, three, four, or six furnace tubes. The single furnace is found inconvenient for cleaning as taking in too much cold air at once, loosing steam in the operation. The size of the boiler used has been gradually increased and so also the pressure until we find on shells 16 feet in diameter pressures as high as 90 pounds per square inch carried as the working pressure.

SPECIFICATIONS FOB LOCOMOTIVE BOILER OF ENGINE NO. 152. WABASH, ST. Louis & PACIFIC BAIL WAY.

General dimensions of engine.—

Cylinder 17 X 24 inches

Driving wheels diameter 5 ft. 9%

Inletports i& X 12^ "

Steam ports 1M X 16

Exhaust port 3 X 16

Width of bridges 1M "

Tank capacity -. 3,000 gals.

Weight on driving wheels 51,000 Its.

Weight of engine with three gauges of water 80,000 "

Boiler and fire-lox of steel. Tubes of wrought-iron. Fuel, soft coal—

Diameter inside barrel of boiler 52 inches

Length of fire-box 66

Width of fire-box 34%

Height of tire-box at front end 70

Height of fire-box at back end 64^

160 tubes 2-inch outside diameter, length lift. 6

Heating surface in fire-box less tube area 99.5 sq ft.

Heating surface tubes outside 963.4

Total 1062.9

Firegrate area 15.6

Fire grate area air openings 5.6

Ratio heating surface to grate area 68.3

Ratio grate area to flue area 2.47

Water capacity with two gauges or 5%-inch above crown 1,150 gals, or 153.3 cu ft.

Steam capacity under same conditions 47.2

Total..., 200.5

SPECIFICATION FOR BOILER.

Boiler. —Straight top made throughout of best homogeneous steel plates /B-inch thick (unless otherwise specified) and rivetted with f-inch rivets spaced not over 1$ inch between centers. All longitudinal seams double rivetted and welted, all circular seams single rivettsd and welted around the bottom to above water line.

Pressure. —150 pounds per square inch.

Waist. —Inside diameter at smoke-box end 52 inches and at fire- box end 53| inches. Side sheet of fire-box shell f-inch in thickness, and extending to the top, forming a butt joint at crown, and over these an extra crown sheet f-inch in thickness is placed, extending down far enough on each side to receive all the fire-box crown stays. This extra crown sheet is rivetted to the side sheet on each side of the butt joint formed by them

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