Design and Function: Screwed flanges are typically used in systems where welding is not practical or desirable. They feature internal threads that match the threads on a pipe or fitting. This allows them to be screwed onto the pipe, providing a secure connection.

Applications: They are often used in systems where the pipe needs to be disassembled frequently, as the threaded connection makes it easier to remove and replace parts. They’re common in low-pressure systems and applications where ease of maintenance is important.

Material: Screwed flanges can be made from various materials such as carbon steel, stainless steel, or other alloys, depending on the requirements of the application, including factors like temperature and pressure.

Advantages: They are relatively easy to install and don’t require welding, which can be advantageous in certain environments. They also offer flexibility for assembly and disassembly.

Disadvantages: They may not be suitable for high-pressure or high-temperature applications due to the limitations of the threaded connection, which might not be as strong or leak-proof as welded connections.