Audels Engineers and Mechanics Guide, Volume 6

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T. Audel & Company, 1921 - Steam engineering
 

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Really good book for those who operate/repair blrs
This is a book every boiler operator and repair maint. person should read to get an idea where we came from and how somethings have not changed in
this line of work. This book shows many old school ways of doing things that can give you an understading of what the modern junk now is trying to do and how it was designed to work. History is only part of the learning that can be obtained in this book. Don't discount its age for being useless. There is a lot of very useful information in this book. 

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Page 2-663 - ... so as to give an effective area equal to that of the aforementioned spring-loaded safety valve, may be used in lieu of the common lever-weighted...
Page 2-670 - ... being known) to withstand any given pressure of steam in a boiler, or who is not able to figure and determine the strain brought on the braces of a boiler with a given pressure of steam, the position and distance apart of braces being known, such knowledge to be determined by...
Page 2-404 - When 50 per cent or more of the load which would act on an imstayed solid head of the same diameter as the shell, is relieved by the effect of tubes or through stays, in consequence of the reduction of the area acted on by the pressure...
Page 2-723 - The small end of the bore may be countersunk not more than one thirty-second of an inch in depth and width, but no recess, thread, or cavity other than this countersink shall be allowed. Fusible plugs, except those which are hereafter provided for. shall have an external diameter of not less than three-fourths of an inch pipe tap , and the filling shall be at...
Page 2-723 - Fusible plugs shall be so fitted that the smaller end of the filling is in direct contact with the radiant heat of the fire, and shall be at least 1...
Page 2-292 - Under natural draught conditions, Burnot found that when burning about 11 pounds of coal per square foot of grate surface per hour, the efficiency increased as the firing interval and weight of charge were decreased. He found evaporative efficiencies as follows (ordinary coal): With charge equal to 1 shovelful 9.64 With charge equal to 2 shovelfuls...
Page 2-674 - Safety valves when fitted either to the shell of boiler or steam drum may be fitted with internal dry pipes when made of standard steam pipe or of riveted material equal in thickness, and when the combined openings in the dry pipe equal in area at least one and one-half times the opening of the valve.
Page 2-330 - Slowly, however, they come in contact with small particles of calcic sulphate and other solids separating from the water and sticking to them, they gradually coat the particles with a covering of oil, which in time enables the particles to cling together or to the surfaces which they come in contact with. These solid particles of calcic carbonate, calcic sulphate...
Page 2-306 - Never allow the fire to be so low before a fresh charge is thrown in that there shall not be at least three to five inches deep oj clean, incandescent fuel on the bars, and equally spread over the whole.
Page 2-723 - Externally heated cylindrical boilers, with flues, shall have one plug in the top of the upper flue, not more than 4 feet from the back end of the flue, and shall also have a. plug fitted to the shell of the boiler immediately below the fire line, and not less than 4 feet from the front end : Provided...

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