Marine Boiler Management and Construction: Being a Treatise on Boiler Troubles and Repairs, Corrosion, Fuels and Heat, on the Properties of Iron and Steel, on Boiler Mechanics, Workshop Practices and Boiler Design |
Common terms and phrases
analyses angle annealing bars beam bending bubbles burnt carbonic acid caulking centre circumferential coal cold combustion chamber compression stress contain copper corrosion cracked curvature D. K. Clark diameter draught drilled edges elastic limit electromotive force elongation end plates Enging evaporation experiments factor of safety fibre fire fitted flame flange flat plates fluid formula fuel funnel furnace girder hammer heating surface holes hydrogen increased iron plates joint length limit of elasticity longitudinal machine material means measured metal mild steel nitrogen nuts oxygen percentage phosphorus pipe pitch pressure produced punched pyrometer radiation ratio reduced rivet salt sample scale screwed stays seams sectional area shearing stress shell plate shown in fig side square inch steam space strength temperature tenacity tension test piece thickness tons tube plate valve velocity waste gases water-tube boilers weight welded zinc
Popular passages
Page 378 - C = 100 when the plates are not exposed to the impact of heat or flame, and the stays are fitted with nuts and washers, the latter being at least three times the diameter of the stay and twothirds the thickness of the plates they cover.* C = 90 when the plates are not exposed to the impact of heat or flame.
Page 420 - D is the external diameter measured at the bottom of the corrugations in inches, t is the thickness of the furnace plate in 32nds of an inch, measured at the bottom of the corrugation or camber...
Page 409 - The rivet shanks are to be bent cold, and hammered until the two parts of the shank touch in the manner shown in Fig.
Page 344 - Q = 120 where the stay tubes are pitched with two plain tubes between them, and are not fitted with nuts outside the plates, C = 130 if they are fitted with nuts outside the plates, C...
Page 346 - In the furnaces referred to below, the formulae given are applicable if the steel used has a tensile strength of not less than 26 nor more than 30 tons per square inch. If the material of furnaces has a less tensile strength than 26 tons per square inch, then, for each ton per square inch which the minimum tensile strength falls below 26, the coefficient is to be correspondingly decreased by Jg part.
Page 407 - The material is to have an ultimate tensile strength of not less than 26 and not more than 30 tons per square inch of section, with an ultimate elongation of not less than 20 per cent.
Page 407 - Plates and bars for boilers shall comply with the following mechanical tests. All test pieces shall be selected by the Inspector and tested in his presence, and he shall satisfy himself that the conditions herein described are fulfilled.
Page 371 - The sectional area of the body of the forging (as forged) is not to exceed one-fifth of the sectional area of the original ingot, and no part of the forging (as forged) is to have more than two-thirds of the sectional area of the original ingot.
Page 344 - P are as above. Note. — In the case of front plates of boilers in the steam space, these numbers should be reduced 20 per cent., unless the plates are guarded from the direct action of the heat. For steel tube plates in the nest of tubes the strength to be taken from UP x T2 ... - — - = working pressure in Ibs.
Page 430 - Where vertical boilers have a nest or nests of horizontal tubes so that there is direct tension on the tube plates due to the vertical load on the boiler ends or to their acting as horizontal ties across the shell, the thickness of the tube plates and the spacing of the tubes are to be such that the section of metal taking the load is sufficient to keep the stress within that allowed on the shell plates.