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1. Expansion pipe joint: Expansion pipe joint is suitable for non corrosive or corrosive medium pipe joints such as oil, water, and gas. The steel pipe has flexible specifications and is firmly connected to the pipeline after welding. Good sealing performance, widely used in oil refining, chemical industry, light industry, textile, national defense, metallurgy, shipbuilding and other systems; It is also suitable for hydraulic transmission pipelines in various mechanical engineering, machine tool equipment, etc;

2. Jacket joint: The working principle of a jacket joint is to insert a steel pipe into the jacket, lock it with a jacket nut, resist the jacket, cut into the pipeline, and seal it. When connecting to steel pipes, welding is not necessary, which is beneficial for fire prevention, explosion prevention, and high-altitude operations, and can eliminate the disadvantages caused by careless welding connections. Therefore, it is a relatively advanced connector in the pipeline of automatic control devices for systems such as oil refining, chemical engineering, petroleum, food, pharmaceuticals, and instrumentation. Suitable for connecting medium pipelines such as oil, gas, and water. The jacket joint is firmly connected, with high pressure resistance, good temperature resistance, good sealing, good repeatability, convenient installation and maintenance, and reliable operation;

3. Welding connection pipe joints: Welding connection pipe joints are suitable for non corrosive or corrosive media such as oil, water, gas, etc. For welded sealed pipe joints, the steel pipe specifications are flexible and firmly connected after welding with the pipeline. Good sealing performance, widely used in oil refining, chemical industry, light industry, textile, national defense, metallurgy, shipbuilding and other systems; It is also suitable for various mechanical engineering, machine tool equipment, and other hydraulic transmission pipelines. When the production of sleeve joints cannot meet the needs, priority can be given to highly corrosive situations.