Abstract
Flange bolt connection is one of the most important bolt connection methods at present. In this paper, the bolt connection between the shell and the back flange of a certain type of equipment was evaluated and calculated, the weak area of the structure is mainly the bolt joint, so bolt safety design and check is a very key part of the structure check, the finite element method and "VDL2230-2003 Bolt strength checking standard" were used to calculate, the boundary conditions of bolt load were obtained by finite element method, and the application of VDI 2230 in flange bolt connection analysis and bolt safety evaluation were systematically described. The results show that M20 bolt can meet the requirements of safe use, while M16 and M18 bolt cannot.
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