For pressure vessels gasketed joints, obtaining a uniform bolt load distribution is mandatory in order to ensure leak-free service of the joint. However, due to the elastic interaction phenomenon, it is difficult to achieve a uniform bolt load distribution. To address this difficulty, standards recommend tightening sequences that have shown good performance. However, these sequences have to be carried out in several passes; in addition, the standards point out that each assembler should develop its particular tightening sequences. In order to overcome these disadvantages, it is possible to find methods that provide a particular tightening sequence with which a uniform bolt load is obtained in a single pass tightening sequence. The most popular method is the Elastic Interaction Coefficients Method (EICM). In previous works [1,2], a new methodology called Tetraparametric Assembly Method (TAM) was developed for ASME Ring Type Joints (RTJ). In comparison with the EICM, the TAM provides very accurate results with much lower cost. In this work, the TAM has been implemented in Microsoft Excel (programmed in Visual Basic for Application), to obtain in a few seconds an optimal tightening sequence for most RTJ (NPS, Class and SCHD) for any target load and any assembly pattern using one or two passes.
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机译：对于压力容器用垫圈密封的接头，必须确保螺栓载荷分布均匀，以确保接头无泄漏。然而，由于弹性相互作用现象，难以实现均匀的螺栓载荷分布。为了解决这个困难，标准建议采用表现出良好性能的拧紧顺序。但是，这些序列必须分多次执行;此外，标准指出，每个组装商应制定其特定的拧紧顺序。为了克服这些缺点，可以找到提供特定紧固顺序的方法，利用该方法可以在单次拧紧顺序中获得均匀的螺栓载荷。最受欢迎的方法是弹性相互作用系数法（EICM）。在以前的工作[1,2]中，为ASME环形接头（RTJ）开发了一种称为四参数装配法（TAM）的新方法。与EICM相比，TAM以非常低的成本提供了非常准确的结果。在这项工作中，TAM已在Microsoft Excel（在Visual Basic for Application中编程）中实现，以便在几秒钟内获得大多数RTJ（NPS，Class和SCHD）的最佳拧紧顺序，以使用任何目标负载和任何装配模式一两遍。
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