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 . 4 inches to the neutraldiameter of the lagging, or inches circumference, ^^ithsections 4^/3 inches wide we would have forty-six pieces. Alittle more than the exact amount is furnished in order thatthe last piece may be sawed and fitted. The various sectionsare held to each other, and the whole thing is bound togetherby the use of corrugated pieces of steel, as shown in Eig. lagging for the dome is shown in Fig. 12
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 . 4 inches to the neutraldiameter of the lagging, or inches circumference, ^^ithsections 4^/3 inches wide we would have forty-six pieces. Alittle more than the exact amount is furnished in order thatthe last piece may be sawed and fitted. The various sectionsare held to each other, and the whole thing is bound togetherby the use of corrugated pieces of steel, as shown in Eig. lagging for the dome is shown in Fig. 122. The sec-tions are tacked to each other and built all around the bodyof the dome. The whole thing is then inclosed by a domecasing, C, which is made of thin sheet iron. The top of the. is, of course, an advantage to the builder. In other cases thelagging is more expensive, and of course serves its purposeas a covering to more excellent advantage. On small locomotives, for plantation and light locomotivework, wood is often used for lagging. The pieces are sawedin strips about 3 inches wide, and in length and thickness tofit courses. These are held in place by hoop irons, which arewrapped around the boiler, nails being driven through thehoop irons into the wooden strips, thus securing the the boiler is thus covered it is surrounded with a sheetiron covering. This is an inexpensive lagging, and is used agreat deal. Various compositions are used also, in the form of sec-tional lagging. Some of these are good enough for mediumsize boilers. On large locomotive boilers, however, for heavyfreight and passenger service, magnesia sectional lagging islargely used. Eig. 120 shows an outline of a locomotive boiler which is tobe covered with sectional lagging. . A
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
