Evaluations of Bolt Assembly Guideline of Pipe Flange Connections With Systematic Finite Element Simulation

  • TAKAKI Tomohiro
    Department of Ocean Electro-Mechanical Engineering,Kobe University of Mercantile Marine
  • FUKUOKA Toshimichi
    Department of Ocean Electro-Mechanical Engineering,Kobe University of Mercantile Marine

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Other Title
  • 有限要素解析による管フランジ締結体のボルト締付け指針の検討
  • ユウゲン ヨウソ カイセキ ニ ヨル カンフランジ テイケツタイ ノ ボルト シメツケ シシン ノ ケントウ

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Description

In these environmentally sensitive times, bolted flanged joint design that makes the leakage from a joint a design criterion has been investigating. However, achieving uniform bolt preload is difficult when tightening pipe flanges with a number of bolts, even if the appropriate amounts of bolt preload can be calculated following established design rules. A guideline for bolted flange joint assembly has been presented by ASME. However, the guideline needs repeated bolt-up operations to get uniform preloads. In this study, in order to establish a more effective bolt assembly guideline, numerical calculations are systematically executed by using three-dimensional finite element analysis. The analytical objects are pipe flanges of class 150lb and 300lb raised face slip-on welding type specified in JPI with a compressed asbestos sheet gasket inserted. The variations of bolt preload and contact pressure distributions at the gasket bearing surface during bolting up are estimated.

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