Flanged connections are very common in pipe connections and are mainly divided into the following types:

1. Plate welding flange connection

Plate welding flange is a commonly used flange connection method, with simple structure and good sealing performance. This connection method is suitable for medium and low pressure pipelines, easy installation, and low cost.

2. Welded neck flange connection

Compared with plate welding flange, welded neck flange can withstand greater pressure due to its neck. It has excellent sealing performance and is widely used in medium and high pressure pipeline systems.

3. Butt welding flange connection

Butt welding flange connection is a stronger connection method, suitable for pipeline systems with higher pressure and higher temperature. In the connection process, the flange and the pipe are connected by welding, with good sealing and reliability.

4. Threaded flange connection

Threaded flange connection is a way to connect the flange to the pipe through threads. This connection method has a simple structure and low cost, but the sealing performance is slightly poor, and requires frequent inspection and maintenance.

5. Blind flange connection

Blind flange connection is mainly used to close the end of the pipeline or the inlet and outlet of the equipment. This flange does not connect to the pipeline and is mainly used for inspection or testing.

6. Other special flange connections

In addition to the common flange connection methods mentioned above, there are some special connection methods, such as ring groove flange connection, lap flange connection, etc. These special connection methods are designed according to specific application scenarios and needs, and have unique advantages and application ranges.

In summary, flange connection methods mainly include plate welding flange, welded neck flange, butt welding flange, threaded flange and blind flange. When choosing a flange connection method, it is necessary to consider comprehensively the pressure, temperature, medium and application scenarios of the pipeline. At the same time, to ensure the reliability and safety of the flange connection, it is necessary to select high-quality flange products and strictly follow the relevant standards for installation and maintenance. The correct flange connection method can ensure the...