1. Medium Properties:

If the medium is corrosive, choose a flange material with high corrosion resistance, such as stainless steel or copper.

2. Pressure and Temperature:

High-pressure and high-temperature environments require high-strength, high-pressure flanges, such as butt-weld flanges.

3. Connection Method and Piping System:

Flanges connect two components using bolts, welding, or threads. The method you choose depends on the design and installation requirements of the piping system.