The Locomotive . as well as others of similar nature, should serve asa warning against the tendency to improvise high pressure containersfrom makeshift equipment not designed for that purpose. The ordi-nary oil drum, built only strong enough to withstand handling withoutopening its seams, is nowise suited to contain a fluid under come to light now and then of garages and factories rig-ging up galvanized hot water tanks — intended for domestic use —as compressed air containers. While some of these tanks when new,are able to withstand considerable pressure, many of these insta
The Locomotive . as well as others of similar nature, should serve asa warning against the tendency to improvise high pressure containersfrom makeshift equipment not designed for that purpose. The ordi-nary oil drum, built only strong enough to withstand handling withoutopening its seams, is nowise suited to contain a fluid under come to light now and then of garages and factories rig-ging up galvanized hot water tanks — intended for domestic use —as compressed air containers. While some of these tanks when new,are able to withstand considerable pressure, many of these installationsare second-hand vessels weakened by interior corrosion. Such in-stances occur because the garage keeper or factory foreman has no ideaof the tremendous force exerted on a tank by pressures no greaterthan fifty or sixty pounds a square inch. No Bigotry Here Dearest, will you marry me? Doug, I must tell you Im a somnambulist. Thatll be all right. Im broad minded about religion. 52 THE LOCOMOTIVE April,. A QUARTERLY MAGAZINE DEVOTED TO POWER PLANT PROTECTION Georgpe Hargis Prall, Editor Copyright 1928 by The Hartford Steam Boiler Inspection and Insurance Company HARTFORD, CONN., April i, 1928 Single Copies can be obtained free by calling at any of the companys agencies. Subscription price 50 cents per year when mailed from this office. Recent bound volumes one dollar each. Earlier ones two dollars. Reprinting matter from this paper is permitted if credited to The Locomotive of The Hartford Steam Boiler Inspection & Insurance Co. Avoiding Cracking of C. I. Boilers USERS of steam and hot water heating systems will be interestedin reading in this issue articles on An Improved Return LineHook-up and Absence of Relief Valve Proves Costly . Thearticle first mentioned above presents a well-tested arrangement by whichsteam heating plants may be rendered less liable to the most commontype of failure, namely the cracking of a section because of low from any cause the
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