What factors should be considered when choosing stainless steel flanges?

When choosing a stainless steel flange for your piping system, there are several factors you need to consider:

1. Pressure Rating: You need to ensure that the flange's pressure rating matches or exceeds the pressure rating of the pipe.

2. Temperature Rating: You need to ensure that the flange's temperature rating matches or exceeds the temperature rating of the pipe.

3. Flange Size: You need to ensure that the flange size matches the size of the pipe.

4. Flange Class: Flange class refers to the pressure-temperature rating of the flange and is based on its construction material and size.

5. Flange Facing: Flange facing refers to the type of finish on the flange's contact surface. The most common flange facing is a raised face, but other types like flat face and ring-type joints are available.