The connection methods of German standard flanges mainly include the following:

1、 Bolt connection

Bolt connection is the most common method of flange connection. It achieves sealing by fastening two flanges with through holes together with bolts and adding a gasket in the middle. This connection method has the characteristics of simple structure, easy disassembly, and strong pressure bearing capacity, and is suitable for various working conditions. In bolted connections, it is necessary to ensure that the material, specifications, and quantity of the bolts meet the design requirements, and to tighten them in the correct order and force to ensure the tightness and sealing of the connection.

2、 Welding connection

Welding connection is the process of joining two flanges together by welding. This connection method has the characteristics of high strength, good sealing, and stronger pressure bearing capacity, and is suitable for harsh working conditions such as high pressure and high temperature. In butt welding connections, it is necessary to ensure that the welding quality and strength of the weld meet the design requirements, while avoiding problems such as defects and stress concentration during the welding process.

3、 Other connection methods

In addition to bolted and butt welded connections, German standard flanges can also use other connection methods, such as socket welding connections, threaded connections, etc. These connection methods have unique advantages and application value under certain specific working conditions. For example, socket welding connection is suitable for situations where the pipeline diameter is small and the pressure is low; Threaded connections have the characteristics of easy installation and disassembly, and are suitable for small diameter pipelines.

It should be noted that when selecting the connection method for German standard flanges, comprehensive consideration should be given to specific working conditions, pipeline diameter, pressure rating, medium characteristics, and other factors. At the same time, it is necessary to ensure that the sealing, pressure bearing capacity, and stability of the selected connection method meet the design requirements to ensure the safe and stable operation of the pipeline system.