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A boiler stay is an internal structural element used inside boilers. Where the shell of a boiler or other pressure vessel is made of cylindrical or (part) spherical elements, the internal pressure will be contained without distortion. However, flat surfaces of any significant size will distort under pressure, tending to bulge. Stays of various types are used to support these surfaces by tying them together to resist pressure. Some boiler configurations require a great deal of staying. A large locomotive boiler may require several thousand stays to support the firebox. ==Stay types== File:Screwed boiler stay (Bentley, Sketches of Engine and Machine Details).jpg|Rod stay File:Girder boiler stay (Bentley, Sketches of Engine and Machine Details).jpg|Girder stay File:Longitudinal boiler stay (Bentley, Sketches of Engine and Machine Details).jpg|Longitudinal stay File:Boiler gusset stay (Heat Engines, 1913).jpg|Gusset stay 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「boiler stay」の詳細全文を読む スポンサード リンク
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