Sanitary steel pipe

Sanitary steel pipes are mainly used in food, beverage, wine, biological engineering and other production equipment and production lines.

1. Surface finish: Polish the inner and outer surfaces of the steel pipe to make the surface of the steel pipe bright; that is, the mirror surface we often say. The main purpose is to prevent the fluid material in the pipe from forming a hanging wall in the pipe, which is easy to contaminate and cause blockage in the pipe after a long time.

2. Passivation layer: After polishing, the steel pipe needs to be put into the passivation tank for immersion, and the surface of the steel pipe is oxidized with an acidic passivation solution to form a passivation layer, so as to achieve the anti-corrosion effect of the steel pipe.

3. Oil-free degree: After passivation is completed, oil-free cleaning is carried out to remove oil stains on the surface of the steel pipe. After completion, it needs to be checked with a grease analyzer. It is mainly to prevent the oil pollution of the pipe wall itself from contaminating the fluid substances in the pipe.