Flange is also called flange or ridge. Parts that connect the pipe to the pipe. Connected to the tube end. There are holes in the flange that can penetrate bolts to make the two flanges tightly connected. Flange connections are most widely used in chemical, pharmaceutical equipment and pipelines due to their unique advantages of reliable sealing, high strength and wide adaptability.

By pre-tightening the bolts, the gasket between the flange sealing surface is pressed and solid, and the uneven gap on the flange sealing surface is filled, preventing the permeability leakage of the medium through the capillary pores inside the gasket and the interface between the gasket and the sealing surface. This achieves pre-sealing.