Flange sealing properties and applications in several issues

Flanges and gaskets, fasteners, collectively known as the flange joint. Flanged joints are used in petrochemical production is very common and involves a very wide parts. It was piping design, pipe valves essential parts, but also the equipment, equipment components (such as manholes, hand holes, level meter, etc.) in the essential components. Flange joint of the pressure vessel, pressure in the pipe and sealing the main function is  Hydraulic pipe fittings to connect, not because of the failure strength of the flange, but rather the bolt load, the spacer medium pressure reaction force and resultant moment action, since the lack of rigidity and deformation (corner), making it uniform clamping force on the gasket, resulting in flange joint leakage. Therefore, the control flange flange joint stiffness and deformation is the key. Because flange joint loads and deformation factors involved is more complex, long experience and can only be used to indirectly reflect the flange stress calculations, foreign specification has been included in the flange stiffness calculation method, and our vessel standards and regulations (GB150 and content regulation) is to ensure the safe operation of the pressure vessel developed for the goal, to prevent the intensity and pressure vessel safety become synonymous with failure or brittle fracture