Techniques and methods for plugging leaks under pressure

Principle of plugging leaks under pressure 　Plugging leaks under pressure refers to the method of stopping leaks in pipes and containers that are under pressure, i.e., at pressures higher than atmospheric pressure, where the media stored or transported inside suffer from leakage due to corrosion, perforations, or human-induced damage. This is done without interrupting the flow of the medium or changing the container’s contents, by sealing the leak while the medium is still in motion. Operations that generate sparks, such as welding or using electric grinding wheels, can often be used for this purpose, as there is no concept of working without generating heat in the context of plugging leaks under pressure. However, in actual leak sealing operations, flammable and explosive substances are often present, and no sparks whatsoever are allowed to be generated. As a result, in China, pressure-based leak sealing methods were gradually replaced by methods that allow sealing under pressure without using fire. This approach makes it possible to explain the essence of this industry more clearly. Although people tend to simplify it to just \"pressure-based leak sealing,\" nowadays the term \"pressure-based leak sealing\" is understood by most people to refer to sealing under pressure without the use of fire. Since the industry of leak sealing under pressure has not been standardized, there are various terms used to describe it. Most people consider leak sealing under pressure to be a form of injection-based sealing, but in reality, injection-based sealing is just one of the techniques employed in this field. It can only be used for leak sealing on straight pipes, which limits its applicability; it is ineffective in cases involving tees, elbows, reducers, flange roots, and large containers. In order to establish unified terminology and standards for the pressure-based leak sealing industry, Shanghai Guangben Industrial Co., Ltd. has developed the \"Enterprise Standard for Pressure-Based Leak Sealing Without Fire Use.\" This standard details ten technical processes used in this industry, as well as providing a comprehensive list of leak sealing products, guidelines for leak sealing protection, standards for related terminology, procedures for on-site organization and management during leak sealing operations, and methods and techniques for preparing budgets related to leak sealing. Pressure-based leak sealing technology: For over 40 years, Jiangsu Waterproof Leak Sealing Engineering Company has been dedicated to the research of various pressure-based techniques for repairing leaks in settlement joints, as well as waterproofing and leak sealing solutions. In recent years, advanced foreign technologies for waterproofing and leak sealing under pressure, capable of withstanding seepage and seismic forces, have been introduced; these technologies offer high efficiency in carrying out such tasks, and the related construction work has been carried out across the entire country. We specialize in dealing with leaks in various underground structures; in particular, we handle leaks caused by cracks in large-volume concrete, seal leaks in tunnels, prevent leaks in cooling towers, address leaks at settlement joints, seal leaks in cable shafts, repair leaks at construction joints, prevent and seal leaks in basement garages, ensure water resistance in cooling towers, protect cable trenches from moisture, prevent leaks in mines, handle high-pressure leaks in pump rooms, provide waterproofing solutions for civil defense purposes, and seal leaks in water tanks. With years of experience in construction and maintenance work, we are the experts you can rely on for leak repair! Pressure-based leak sealing tools The most common tools used in pressure-based leak sealing operations are manual pumps and injection devices

Thank you for the suggestion from the second floor. The key issue is that we are in the petrochemical industry, where there is also the problem of flammability and explosiveness. Are there any colleagues with experience in this area? :handshake

We also use rubber and clips, and the result is pretty good.

Using Fushilan polymer composite material technology, we can address certain leakage issues online, without the need for welding or electricity. Thanks to the rapid curing properties of polymer composites, as well as their strong adhesion and corrosion resistance, it is possible to fix leaks of up to 5 kilograms in size online. However, leaks at such high pressures as those mentioned by the poster are quite difficult to resolve. As far as I know, the method of using special tools to inject sealant can help deal with high-pressure leaks; you can search for “leak sealing under pressure” on Baidu. Let professional companies handle some of the more difficult leak repair tasks.

Pipeline leaks under high pressure clearly cannot be repaired using composite methods. Method 1: The only temporary solution to stop leaks is the old method of using clips to inject the sealant. The original poster can try box-type clamps; they will work much better than clips. Method 2: Alternatively, it is possible to replace the pipe without stopping the operation. Our company has over 50 years of experience in the technologies of making openings under pressure without stopping operations and sealing pipes under pressure. Applicable conditions: 100 bar at 38°C, 48 bar at 370°C. Suitable for flammable and explosive gases.