DIN 2642 flanges are German standard flanges commonly used in the piping industry. They are typically used to connect pipes, valves, pumps, and other mechanical components in a piping system. These flanges have a smooth surface and a circular shape, which makes them ideal for applications where pressure is a concern. They are often helpful in high-pressure systems, such as oil and gas, chemical, and petrochemical industries. They are also commonly used in constructing power plants, paper mills, and other industrial facilities. The flanges are available in various sizes and materials, making them suitable for multiple applications.