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Boilers for generating steam or hot water have been designed in countless shapes, sizes and configurations. An extensive terminology has evolved to describe their common features. This glossary provides definitions for these terms. Terms which relate solely to boilers used for space heating or generating hot water are identified by (HVAC). == A-B == ; : A container beneath the furnace, catching ash and clinker that falls through the firebars. This may be made of brickwork for a stationary boiler, or steel sheet for a locomotive. Ashpans are often the location of the damper. They may also be shaped into hoppers, for easy cleaning during disposal. ; : ; Blow-down: Periodic venting of water from the boiler. This water contains the most concentrated precursors for sludge build-up, so by venting it whilst still dissolved, the build-up is reduced. When early marine boilers were fed with salt water, they would be blown-down several times an hour. ; : a valve mounted low-down on the boiler, often around the foundation ring, which is used for blow down. ; Blower: the blower provides a forced draught on the fire, encouraging combustion. It consists of a hollow ring mounted either in the base of the chimney or on top of the blastpipe. Holes are drilled in the top of the blower ring, and when steam is fed into the ring, the steam jets out of the holes and up the chimney, stimulating draught, much like a blastpipe. ; : ; : a craftsman skilled in the techniques required for construction and repair of boilers. Historically known as a boilersmith. ; Boiler suit: heavy-duty one-piece protective clothing, worn when inspecting the inside of a firebox for steam leaks, for which task it is necessary to crawl through the firehole door. ; Boiler ticket: the safety certificate issued for a steam (locomotive) boiler on passing a formal inspection after a major rebuild, and generally covering a period of ten years. Additional annual safety inspections must also be undertaken, which may result in the locomotive being withdrawn from service if the boiler requires work. When the ticket "expires" the locomotive cannot be used until the boiler has been overhauled or replaced, and a new ticket obtained.〔(【引用サイトリンク】title=Boiler Makers Union ) 〕 ; Boiler water treatment: Removal or chemical modification of boiler feedwater impurities to avoid scale, corrosion, or foaming. ; : A horizontal baffle of firebrick within the furnace, usually of a locomotive boiler. This forces combustion gases from the front of the furnace to flow further, back over the rest of the furnace, encouraging efficient combustion. The invention of the brick arch, along with the blastpipe and forced draught, was a major factor in allowing early locomotives to begin to burn coal, rather than coke. ; : 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glossary of boiler terms」の詳細全文を読む スポンサード リンク
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