Do you know the common causes of flange leakage? The editor of PL Flange supplier china will show you a brief look!
1. Thermal expansion and contraction
Due to the thermal expansion and contraction of the fluid medium, the bolts will expand or contract, so that the gasket will create a gap, and the medium will leak through pressure.
2. Corrosion effects
Due to the long-term erosion of the gasket by the corrosive medium, the gasket will undergo chemical changes. The corrosive medium penetrates into the gasket, and the gasket begins to soften and lose its pressing force, causing flange leakage.
3. Stress effect
When the flange is installed, the butt joint of the two flanges is relatively standard. However, in the production of the system, the temperature of the pipe will change after the pipe enters the medium, which will cause the pipe to expand or deform, which will cause the flange to be subjected to bending load or shear force, which is easy to Cause the gasket to fail.

4. Wrong hole
Wrong hole means that the pipe is concentric with the flange, but the distance between the bolt holes of the two flanges is relatively large. The wrong hole will cause stress on the bolt. If the force is not eliminated, it will cause shearing force on the bolt. If it takes a long time, the bolt will be cut off and the seal will fail.
5. Open your mouth
Opening the mouth means that the flange gap is too large. When the flange gap is too large to cause external loads, such as axial or bending loads, the gasket will be impacted or vibrated, lose its pressing force, and gradually lose the sealing kinetic energy and cause failure.
6. Wrong words
Wrong mouth means that the pipe and the flange are perpendicular, but the two flanges are not concentric. The flanges are not concentric, so that the surrounding bolts cannot pass freely into the bolt holes. When there is no other way, only reaming or using a smaller bolt to penetrate the bolt hole, and this method will reduce the tension of the two flanges. Moreover, the sealing surface line of the sealing surface is also deviated, so leakage is very easy to occur.
The above is the editor of PL Flange supplier china: a brief introduction to the common causes of flange leakage and related knowledge.