The Boiler |
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Common terms and phrases
angle rings area of rivet area of stay brace butt joint C=constant coal collapsing pressure cubic Diam diameter of boiler diameter of rivet ditional divide this product double riveted EXAMPLE factor of safety feed water flanges flue foot of grate FORMULA furnace Fusible plugs gauge girder grate surface head heating surface horse power hydrostatic test Inch Inch Inch inch thick inches in diameter LEGEND length material percentage pipe pitch of rivet pounds of water pounds per square pres pressure allowed pump rivet hole riveted lap joint rivets in single row of rivets Rule to find safe working pressure safety valve seams section of plate sectional area shaft shearing strength shell single shear solid plate square feet square foot square inch stay bolt steam pressure steel plates strength of material strength of plate strength of rivets temperature tensile strength thickness of plate tubes weight width wrought iron
Popular passages
Page 175 - Multiply one-sixth of the lowest tensile strength found stamped on any plate in the cylindrical shell by the thickness — expressed in inches or parts of an inch — of the thinnest plate in the same cylindrical shell, and divide by the radius or half diameter — also expressed in inches — and the...
Page 21 - From half the sum of the three sides, subtract each side separately; multiply the half -sum and the three remainders together; the square root of the product is the area.
Page 254 - Close throttle, and keep closed long enough to show true level of water. If that level is sufficiently high, feeding and blowing will usually suffice to correct the evil. In case of violent foaming, caused by dirty water or...
Page 210 - And it shall be the duty of all engineers when an accident occurs to the boilers or machinery in their charge tending to render the further use of such boilers or machinery unsafe until repairs are made, or when, by reason of ordinary wear, such boilers or machinery have become unsafe, to report the same to the...
Page 206 - The weight shall then be securely fastened in its position and the lever marked for the purpose of facilitating the replacing of the weight should it be necessary to remove the same, and in no case shall a line or any other device be attached to the lever or weight...
Page 235 - ... the standard of speed), divide the number of gallons by 4 then extract the square root, and the product will be the diameter in inches of the pump cylinder. To find quantity of water elevated in one minute...
Page 134 - The following formulas, equivalent to those of the British Board of Trade, are given for the determination of the pitch, distance between rows of rivets, diagonal pitch, maximum pitch, and distance from centers of rivets to edge of lap of single and double riveted lap joints, for both iron and steel boilers: Let p =greatest pitch of rivets in inches. n =number of rivets in one pitch.
Page 200 - ... valve shall be supplied with a lever that will raise the valve from its seat a distance of not less than that equal to one.eighth the diameter of the valve opening...
Page 75 - For all stays the least sectional area shall be taken in calculating the stress allowable. All screw stay bolts shall be drilled at the ends with a three-sixteenths-inch hole to at least a depth of one-half Inch beyond the inside surface of the sheet. Stays through laps or butt straps may be drilled with larger hole to a depth so that the inner end of said larger hole shall not be nearer than the thickness of the boiler plates from the Inner surface of the boiler. Hollow-rolled screw stay bolts may...
Page 175 - ... and divide by the radius or half diameter, also expressed in inches; and the result will be the pressure allowable per square inch of surface for single riveting, to which add 20...