Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . fc through the furnace. will sustain the weight of the water chamber without ad-ditional blocking. These two last named boilers are of Euro-pean make, and are used to a certain extent in foreign are built in sizes ranging from 500 to 1,800 horse-power. A cylindrical type of automobile boiler is shown in Fig. 31,plan and elevation. The tubes are of copper, and of smalldiameter. They are spaced in rows corresponding to
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . fc through the furnace. will sustain the weight of the water chamber without ad-ditional blocking. These two last named boilers are of Euro-pean make, and are used to a certain extent in foreign are built in sizes ranging from 500 to 1,800 horse-power. A cylindrical type of automobile boiler is shown in Fig. 31,plan and elevation. The tubes are of copper, and of smalldiameter. They are spaced in rows corresponding to con-centric circles, as shown in plan. Being in reality a fire-tubeboiler, the tubes may be grubbed or ripped out, as explainedin a previous issue. In tightening the ends of new tubes, a tempered steel pinof small taper may be driven in each to suit the judgment ofthe operator. A segment collar is then set in the tube, justclear of the inner surface of the tube sheet. A drift pin isthen driven into the collar, thus opening it and enlarging thetube so that when linear expansion takes place on account ofheat when the boiler is in service the tendency will be for.
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
