Gasket is the main seal of flange connection, so the correct selection of gasket is also the key to ensure that the flange connection does not leak. According to different materials, gaskets can be divided into many kinds. In addition to the type of gasket, the identification and selection of gasket are also very important!
For the sealing elements of non-metallic materials, metal materials are usually inserted to strengthen them. At the same time, it is convenient to manufacture and process the sealing elements of fragile materials such as graphite. The reinforcing material can be metal sheet or wire mesh. The metal sheet often adopts the way of punching holes to improve the reinforcing effect and increase the elasticity, and they are bonded together by adhesive and rolling. The sealing element can also be provided with a surface layer or anti bonding treatment layer to increase the sealing effect and prevent the flange sealing surface from bonding.
The material of outer ring or outer ring is solid metal
Help the sealing element to be centered when installing;
Prevent the sealing element from being damaged by excessive compression; Prevent gasket blowing out and reducing flange rotation, etc.
The external strong ring does not contact with the sealing medium, so it is not required to resist the corrosion of medium, so it is often made of carbon steel. The external strong ring can also be made into one with the sealing element, such as metal tooth gasket and wave tooth compound gasket.
The inner reinforcing ring or inner ring contact fluid, its material should be able to resist the corrosion of the sealing medium. The role of inner reinforcing ring is as follows:
Prevent the gap between the sealing element and the vessel or pipe flange to avoid the interference of the gap with the flow of the fluid and the impact of the fluid on the gasket caused by the fluid.
Post time: May-26-2021
