How to select flange gaskets

How to select flange gaskets


Gaskets are essential components in mechanical assemblies, as they provide a tight seal between two mating surfaces to prevent the leakage of fluids or gases. Gasket solutions play a critical role in preventing leaks and ensuring the reliable operation of mechanical systems. Engineers can choose the most suitable gasket solution for their specific applications by understanding the various types, materials, and selection factors.Get more news about Flange Metallic Gasket,you can vist our website!

Gaskets are an important part of flanges, valves and pipe fittings because they help keep water, oil and gas from leaking out of them. Gaskets can be made from rubber, cork or other materials that can expand to fit around a pipe or tube. A flange gasket is a specific type of gasket used on flanges, valves and pipe fittings with a flat edge. It fills the gap between two surfaces to create a waterproof seal around fluid flow joints in piping systems or manufacturing plants. In this post we will discuss what a flange gasket is, how it works, how to select flange gaskets, some common applications for it and some benefits to using this type of gasket over others.

What is a flange gasket?
A flange gasket is a rubber or metal material that sits between two flanges. Flange gasket is used in pipe flange connection.

How does a sealing gasket works?
There must be sufficiently compressed to create a complete barrier to make the gasket function effectively and seal any leaks. It can bring a pressure-tight seal to protect the contents within the seal. In addition, gaskets can protect moving parts, keep them away from hard friction surfaces and generate friction.
An elastic gasket (non-metallic gasket) can prevent the release or entry of gas and liquid, creating a seal between two surfaces. It is a very ideal design for filling deformation and connecting two surfaces together. Since the gaskets will fill the space between these two surfaces, they must be made of easily deformable materials and adequately fill any irregularities.

In order to make the metallic gasket can be sealed accurately, the metal gasket must be compressed under higher stress. In addition, in some cases, the sealant must be applied to the gasket to ensure a leak-free seal.
What thickness gasket should I use?
The thickness of a pipe flange is specified by several factors. The surface condition of the flange face is one of the factors to be considered. For poor quality surfaces, a thicker gasket is recommended as it will flow into and absorb the deformation of the surface, thus ensuring good sealing performance. To obtain a smooth and clean surface, a thinner gasket can be used. Other important factors are media and pressure. Fixing a gasket that is too thick increases the surface area for stress action. The standard gasket materials for pipe flange thickness are 1.5mm and 3mm.

Structure type of gasket
The flat gasket used in industry is generally composed of sealing elements and inner and outer strong rings. The sealing element or gasket body is the key part to prevent leakage. The commonly used materials are non-metallic materials, such as flexible graphite, polytetrafluoroethylene, fiber reinforced rubber matrix composite plate, etc. In addition, the sealing element material can also be a rigid or flexible metal, which is usually used in high pressure and temperature applications.
Sealing elements made of non-metallic materials are usually reinforced by inserting metallic materials, which also facilitates the manufacturing and processing of sealing elements made of fragile materials such as graphite. The reinforcing material can be metal sheet or wire mesh. The metal sheet often uses punching holes to improve the reinforcing effect and increase the elasticity, and they are bonded together by adhesive and rolling. The sealing element may also be provided with a surface layer or an anti adhesion treatment layer to increase the sealing effect and prevent adhesion of the flange sealing surface.