How to repair a leaking seal on an API 600 pressure testing weld seat?
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How to repair a leaking seal on an API 600 pressure testing weld seat?
For fully welded ball valves with seat seal leakage, it is necessary to consider the nature and cause of the leakage. If the leakage is caused by impurities in the pipeline, emergency sealing grease can be applied. If it is due to manufacturing process and technical defects, there is no way to fix it; it can only be scrapped.
It’s not easy to fix leaks in welded valves, so in critical applications, when welded valves are used as drain valves, they are usually equipped with dual valves. . .
If a welded valve leaks internally, the first step is to adjust the limit settings; if that doesn’t work, cleaning fluid should be injected for cleaning, followed by the application of lubricant. If leakage persists, sealing grease with progressively better sealing properties should be used. Of course, applying sealing grease essentially renders the valve unusable, leaving no other option but to replace it
API600 gate valve, leakage at the weld joint between the valve seat and the valve body