1. Material Selection: The material to be used in the production of stainless steel flanges is carefully chosen, typically being stainless steel. Material selection is crucial to ensure the durability and chemical resistance of the flange.

2. Cutting and Shaping: Stainless steel plates or bars are cut into specific dimensions and shapes, determining the outer diameter, inner diameter, and thickness of the flange.

3. Drilling: Drilling is carried out to create holes within the flanges. These holes serve as the locations where bolts will pass through to connect with other parts of pipes or equipment.

4. Machining and Turning: The surfaces of the flanges are smoothed and machined, ensuring the flange's surface is even and smooth. If there are special surface requirements (e.g., gasket surfaces), they are created during this process.

5. Gasket Groove Addition: Some types of flanges are equipped with gasket grooves to facilitate gasket usage. These grooves may need to be machined or added.

6. Testing and Quality Control: Manufactured flanges undergo quality control processes. This involves checking for dimensional accuracy, surface quality, and material conformity. Leak tests may also be conducted.

7. Marking and Labeling: The produced flanges are marked with labels containing information about their type, size, and material.

8. Packaging and Shipping: Finally, the flanges are properly packaged and prepared for transportation. 

Flanges are important components used in various industries and often have high requirements for strength, sealing, and durability. Therefore, the production process is carried out meticulously, and quality control is essential. The production process can vary depending on the type, dimensions, and specific requirements of the flange.