Abstract:  As a common flange connection structure for pressure vessels, pad flange is mostly used for the top head connection of agitators. In this paper, pad flange calculation in different versions of HG/T20582 is compared and analyzed, and on this basis, the calculation of pad flange is verified by finite element analysis, which provides reference for the design and calculation of pad flange in the future.

Key words: pad flange, standard calculation, finite element method