The injecting online leak sealing technology is an emergency repair technique widely applied in process industry, which can remove the leakages of the devices, flanges, pipes and valves, with safe, reliable, economic and efficient. In a variety of online leak sealing operations, the work to handle flange leakages accounts for about 90% of the entire workload. This is because most of flanges in actual production have the installing and machining defects, such as uneven clearance, eccentric, reducing, etc. Aimed at those flanges with defects, to ensure the seal effect, the online leak sealing clamp must be machined and installed precisely, which will increase the difficulty of operation. Thus, on the basis of comparing advantages and disadvantages of the existing enhanced seal clamps, a new design has proposed to solve the problem of flange leakage, especially for the flange with defects, which can reduce the difficulties of operation while ensuring the sealing effect.
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