2725 管フランジ締結体の締付け手順とボルト軸力特性(S58-2 ねじ(2),S58 機械要素の設計・製造・応用技術)

概要

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Bolted flange joint assembly has been widely used in chemical and nuclear plants. Generally, a bolt axial tension is applied by the torque control method for the bolted flange joint assembly. The torque control method does not allows an accurate control of the bolt axial tension due to the problems related to friction. Another cause is that the axial tensions of bolts often do not become uniform because tightening of bolts causes elastic interaction among bolts, when more than one bolts are used. In order to obtain uniform bolt loads and to prevent accidents, a guideline of the pipe flange tightening was proposed by ASME PPC-1. In this study, FEM analysis and any experimentally examined, tightening sequences for the bolted flange joints using multiple bolts are proposed.
2005-09-18