Sanitary stainless steel tube standard introduction
For the standard of sanitary stainless steel tube, mainly for the stainless steel tube surface finish, oil ban and passivation layer requirements.
1. Surface finish: the internal and external surfaces of the tube are polished, making the surface of the tube is bright; that is, we often say that the mirror. Mainly to prevent the tube to go fluid material in the tube to form a wall, long time easy to contaminate and the formation of the tube clogging.
2, passivation layer: polishing is completed after the steel pipe into the passivation pool for immersion, with acidic passivation solution will be oxidized to form a passivation layer on the surface of the steel pipe to achieve the corrosion-resistant steel pipe.
3, the degree of oil ban: passivation is completed after the oil ban cleaning, will be removed from the surface of the steel pipe oil and so on. After the completion of the need to use the grease analyzer for inspection. Mainly to prevent the wall of the tube itself oil contamination to the tube away from the fluid material.