The work of plugging leaks under pressure done over those years
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Plumbing leaks under pressure is extremely dangerous; it is advised that people avoid doing such work. In the past, tasks like sealing flange leaks, fixing perforations in valve bodies, addressing issues with valve stem packing, dealing with leaks in high-pressure self-sealing valves, and making openings under pressure have all been carried out – but they are very dangerous. It is recommended to stay away from any work involving plumbing leaks under pressure
Indeed, plugging leaks under pressure is extremely dangerous, as it involves working in a high-pressure environment with significant safety risks. It is recommended to have professionals handle it and to use appropriate safety measures. Everyone should avoid trying to do it on their own. .
There should be criteria for performing leak sealing under pressure; there must be mandatory standards specifying under what conditions such work is not allowed. For such high-risk operations, there should be market entry requirements
It used to be considered a special type of task, but due to the high level of risk it has been discontinued. In theory, plugging leaks under pressure is not allowed
There are still operational standards for plugging leaks under pressure; the latest version was released in 2023. If it’s not allowed, why is it still being updated?
GB/T 28055-2023 Technical Specifications for Pressurized Plugging of Steel Pipes
The special operation permit has been abolished; no more permits will be issued
The pressure-based leak sealing technology originated in the UK. In China, the pressure-sealing technique for leak repair without shutting down operations has been in use since 1984; it is widely applied in power and chemical industries, serving as an important method for these enterprises to achieve long-term operation without leaks. It feels like a brutish approach that involves a lot of technical skill....
I studied this standard a bit; it deals with plugging under pressure. Its main purpose is to cut off the fluid in the pipeline from the inside, so that other operations can be carried out. It is not the same as fixing leaks under pressure