Flanges are also known as flange plates. Flanges are a very common connecting part used in shaft to shaft connections, and mainly between pipe ends flanges are part of the connecting shaft. The most commonly used part is the connection between pipe ends.
When using flanges they are often used in pairs. In pipeline engineering, ordinary low-pressure pipes can be directly connected by the rebar, this connection is less expensive, but also has many disadvantages. The most typical situation is not able to withstand the impact of high-pressure fluids for a long time. But flange can solve this problem, in the fact of high-pressure pipeline, you can utilize different flanges to connect the pipeline, which can be very good to avoid the impact of high pressure on the pipeline.
1. Precautions for installing flanges
1. When installing flanges. The tightening force between the two flanges should be kept uniform. When fastening, it should be noted that the compression of the rubber gasket should be controlled at one-third.
2. The flanges should have sufficient force to ensure that they are not deformed when they are tightened.
3. The sealing surfaces of the flanges should be kept clean and tidy and should be carefully cleaned of oil and rust spots during installation.
4. The gaskets should have good oil resistance to prevent oil from staining the surface and making it difficult to clean.
5. Excellent aging resistance, good elasticity and mechanical strength.
6. Gaskets of different sizes should be selected according to the shape of the terrain and placed as required during installation.
2. Classification of flange gaskets
1. graphite gaskets: graphite gaskets have good stability and can effectively place corrosion, so graphite gaskets tend to be more suitable for use in high temperature and strong corrosive environments.
2. metal gasket: including pure iron, super soft steel, stainless steel, aluminum and other materials, metal gasket sealing surface machining precision, surface roughness, bolt compression force is very large, usually used in high temperature and high pressure valves.
(1)octagonal and oval gasket, this gasket is very suitable for trapezoidal groove flange sealing surface.
(2)Toothed is in the metal flat gasket sealing surface processing conical corrugation, this gasket Suitable for concave and convex flange sealing surface.
(3)Lens gasket is suitable for lens flange sealing surface
1. PTFE gasket: it is generally used for tongue and groove sealing surface, mainly made of PTFE and PTFE acetylene sandwich glass fiber. It is suitable for low temperature, various pressures of strong corrosive media.
2. asbestos rubber gasket: it is suitable for smooth flange sealing surface, concave and convex flange sealing surface, its advantages are high corrosion resistance and thermal stability, good plasticity, small compression force, to ensure sealing. Disadvantages are low strength, easy to adhere to the flange sealing surface.
Post time: Jul-24-2024