What is the main sealing mechanism of the flange cover when closing the vacant U space?
Publish Time: 2025-02-10
When the flange cover closes the vacant U space, its main sealing mechanism relies on the close fit between the flange cover and the adjacent flange or pipe end face, and the pressure generated by the bolt preload to achieve sealing.Mating surface of flange cover: The flange cover usually has a sealing surface that matches the adjacent flange or pipe end face. This sealing surface is processed to ensure its flatness and finish so that it can fit tightly with the adjacent surface.Bolt preload: The flange cover is connected to the adjacent flange or pipe end face by bolts.When the bolts are tightened, they generate a preload that pushes the flange cover against the adjacent flange or pipe end face. This preload causes close contact between the flange cover and the adjacent face, forming a seal.The role of the gasket: A gasket is usually placed between the flange cover and the adjacent flange or pipe end face. The role of the gasket is to fill the tiny gap between the sealing surfaces and ensure the integrity of the seal. The choice of gasket material depends on factors such as the nature, temperature and pressure of the working medium.Shape of sealing surface: The shape of the sealing surface of the flange cover matches the shape of the adjacent flange or pipe end face. Common sealing surface shapes include flat surface, concave-convex surface and tongue-and-groove surface. Different sealing surface shapes are suitable for different working conditions and sealing requirements.Elastic recovery ability: During long-term working, the flange cover and the adjacent flange or pipe end face may undergo slight deformation due to factors such as medium pressure and temperature changes.Therefore, the gasket needs to have a certain elastic recovery ability to compensate for these deformations and maintain the integrity of the seal.In summary, when the flange cover closes the vacant U space, its sealing mechanism relies on the close fit between the flange cover and the adjacent flange or pipe end face, the pressure generated by the bolt preload, the role of the gasket, the shape of the sealing surface, and the elastic recovery ability of the gasket. These factors work together to ensure that the flange cover can still maintain good sealing performance under harsh conditions such as high pressure, high temperature or corrosive media.
