Flanges have a long history

The history of flanges is also very long. Since the 1970s, China's Nanjing University of Technology, North China University of Technology, China University of Petroleum and other units have carried out a series of research on gasket performance tests and connection design methods, and proposed formula expression methods for gasket performance. On the premise of the nonlinear and non-conservative mechanical properties of the blue disk gasket, the deformation coordination equation of the connection structure is established, and then the tightness analysis method of the bolt flange connection with the maximum allowable leakage rate is designed. It has been many years until now. Great breakthroughs have been made in the technology of flanges.