The Horizontal Tubular Boiler.—Fig. 30.

STANDARD HORIZONTAL TUBULAR STEAM BOILER.

TABLE OF SIZES, PROPORTIONS, ETC.:

Diameter
of
Shell.		Length
of
Shell.		Gauge
of
Shell.		Gauge
of
Heads.		Number
of
Tubes.		Diameter
of
Tubes.		Length
of
Tubes		Square
feet of
Heating
Surface.		Nominal
Horse
Power.
72in.19ft.4in.3⁄8in.1⁄2in.80 4in.18ft.0in.1,500100
72„18„4„3⁄8„1⁄2„86 31⁄2„17„0„1,500100
72„17„4„3⁄8„1⁄2„108 3„16„0„1,500100
66„18„4„3⁄8„1⁄2„74 31⁄2„17„0„1,35090
66„17„4„3⁄8„1⁄2„92 3„16„0„1,35090
60„18„3„3⁄8„1⁄2„78 3„17„0„1,20080
60„17„3„3⁄8„1⁄2„76 3„16„0„1,12575
60„16„3„3⁄8„1⁄2„77 3„15„0„1,05070
60„16„3„3⁄8„1⁄2„70 3„15„0„97565
60„16„3„3⁄8„1⁄2„64 3„15„0„90060
54„17„3„5⁄16„7⁄16„60 3„16„0„90050
54„17„3„5⁄16„7⁄16„56 3„16„0„82555
54„16„3„5⁄16„7⁄16„52 3„15„0„75050
54„16„3„5⁄16„7⁄16„46 3„15„0„67545
54„16„3„5⁄16„7⁄16„40 3„15„0„60040
48„17„2„5⁄16„7⁄16„50 3„16„0„75050
48„16„2„5⁄16„7⁄16„48 3„15„0„67545
48„16„2„5⁄16„7⁄16„42 3„15„0„60040
42„16„2„1⁄4„3⁄8„36 3„15„0„52585
42„15„2„1⁄4„3⁄8„32 3„14„0„45030
42„14„2„1⁄4„3⁄8„28 3„13„0„37525
36„14„2„1⁄4„3⁄8„36 21⁄2„13„0„37525
36„14„2„1⁄4„3⁄8„28 21⁄2„13„0„30020
36„13„2„1⁄4„3⁄8„20 21⁄2„12„0„22515
36„12„2„1⁄4„3⁄8„14 21⁄2„11„0„15010

Note.

In estimating the horse power by means of the above table, 15 square feet has been allowed for each horse power, and the number of feet in each boiler is given in round numbers. This table is one used in every-day practice by boiler makers.

THE FLUE BOILER.