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A hinged expansion joint is a metallic assembly, that can rotate in a single plane, used to absorb changes resulting from piping thermal expansion or contraction.〔(Standard Specification for Circular Metallic Bellows ) ASTM F1120 - 87(2010), (retrieved 1 November 2010)〕 They include hinges, attached to the expansion joint ends with a pair of pins, which allow angular movement in a single plane, restrain the pressure thrust, and prevent the expansion joint from deflecting axially, either in extension or compression.〔(Hinged Expansion Joint ) U.S. Bellows, Inc.-Manufacturer, (retrieved 1 November 2010)〕 It is recommended that the hinges should be used in sets of two or three.〔(Glossary of Terms ) U.S. Bellows, Inc.-Manufacturer, (retrieved 1 November 2010)〕 The expansion joint hinges provide for angular movement and will resist pressure thrust forces.〔(Expansion Joints - Types & Selection ) Charisma Global Network Pvt., Ltd., (retrieved 1 November 2010)〕 Individual hinged expansion joints used in piping systems are restricted to pure angular rotation by its hinges. As a pair, hinged expansion joints will function together to absorb lateral deflection. Advantages of hinged expansion joints are that they are typically compact in size and structurally rigid.〔Standards of the Expansion Joint Manufacturers Association, Inc., Ninth Edition, p. 2-19〕 == Applications == * Air, Steam, & Flue Gas Ducts * Power Plants * Chemical Industry * Gas Turbine System * Petrochemical Industry * Primary reformer ducts & burners〔(Steam Traps, Expansion Joint ) Maintenance Engineering, (retrieved 1 November 2010)〕 * Steel Plants 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「Hinged expansion joint」の詳細全文を読む スポンサード リンク
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