. Factory and industrial management. strength of the plate itself being assumed, or, in other words,guessed at. I know of steam boilers 15 feet in diameter of shell by 18feet long thickness of plate /jg of an inch, which were run underforced draught for years at 50 pounds per sqviare inch gauge pressure;this is the limit for steel plate of 60,000 pounds per square inch ten-sile strength with a safety factor of four only. These were iron boilers,of unknown tensile strength, but they never gave out, I am glad tosay, for the reason that I was in charge of them; or, if this soundsslightly ambiguou
. Factory and industrial management. strength of the plate itself being assumed, or, in other words,guessed at. I know of steam boilers 15 feet in diameter of shell by 18feet long thickness of plate /jg of an inch, which were run underforced draught for years at 50 pounds per sqviare inch gauge pressure;this is the limit for steel plate of 60,000 pounds per square inch ten-sile strength with a safety factor of four only. These were iron boilers,of unknown tensile strength, but they never gave out, I am glad tosay, for the reason that I was in charge of them; or, if this soundsslightly ambiguous, I will add that I am glad they did not give instances in the early steam history of the United States couldbe adduced, particularly in river boats, where the pressures far exceed-ed that just mentioned; some of them survived the stress and othersdid not. The very stringent rules of the Treasury Department for the steam-boat inspection service of the United States as relates to the construe- .38 THE ENGINEERING FLUE FLAXGlX!j MACHINE. HENlV llEKRV cV CO., LTD., LEEDS. tion of marine boilers are strictly enforced by capable officers, and thereis no influence of any sort whatever that can be brought to abate anyof them. The thickness of metal for given pressures, as well as thequality of it in all that relates to tensile strength and elasticity, areset forth in the manual published by the government for constructors,and no departures or evasions are countenanced. All boilers usedin steam vessels of whatever class must be approved as to their typesand designs before they will be allowed to be used, a Board of Super-vising Inspectors meeting in Washington each year for this and otherbusiness of their departments. No one can build a new type of boilerand call for inspection on it without this approval. The result to thetraveling public is alm_ost absolute immunity from disasters by failureof boilers, the actual explosions being very rare. The constru
Size: 1680px × 1487px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
