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What is the cause of flange leakage?
1. Reasons for flange leakage: wrong mouth
A staggered joint means that the pipe and flange are vertical, but the two flanges are not concentric. The flanges are not concentric, so the surrounding bolts cannot freely pass into the bolt holes. In the absence of any other method, the only way is to screw a counterbore or small bolt into the bolt hole, which reduces the tension on both flanges. Also, the sealing surfaces of the sealing surfaces are also biased, which is very prone to leaks.
2. Reasons for flange leakage: Corrosion effects
Because the gasket is corroded by corrosive medium for a long time, the chemical change of the gasket occurs. Corrosive media penetrates into the gasket, the gasket begins to soften, loses compressive force, and causes the flange to leak.
3. Reasons for flange leakage: partial mouth
Offset means that the pipe and the flange are not perpendicular, not concentric, and the flange surface is not parallel. Flange leakage occurs when the internal medium pressure exceeds the load pressure of the gasket. This condition is mostly caused by installation or maintenance and is easier to spot. As long as the actual inspection is done, accidents can be avoided.
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