In the process of pipeline engineering construction, valve leakage will cause pipeline engineering cannot be scheduled; Therefore, it is necessary to analyze the causes of valve leakage in oil and gas pipeline engineering, and take effective measures to prevent and eliminate valve leakage.
Valve leakage generally can be divided into two types: external leakage and internal leakage. Internal leakage refers to the reason that the valve is not closed strictly due to erosion and wear of the conveying medium, and the sealing surface is scratched, and the valve cannot completely prevent the transmission from passing after the valve is completely closed. Leakage generally refers to the valve body itself defects, flange connection surface or connection thread between the airtight causes the transmission medium outflow or leakage to the valve body.
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