Abstract
Gasketed bolted flange pipe joints are always found prone to leakage during operating conditions. Therefore performance of a gasketed flange joint is very much dependent on the proper joint assembly with proper gasket, proper gasket seating stress and proper preloading in the bolts of a joint. For a gasketed flange joint, the two main concerns are the joint strength and the sealing capability. To investigate these, a detailed comparative three dimensional nonlinear finite element analysis of a gasketed joint is carried out using gasket as a solid plate and as spiral wound. Bolt scatter, bolt bending and bolt relaxation are concluded the main factors affecting the joint’s performance. In addition, the importance of proper bolt tightening sequence, number of passes on joint performance are also presented. Summarizing, a dynamic mode in a gasketed joint is concluded, which is the main reason for its failure.
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