This product is specially used for Clean Room (cleanliness system).  It has highly requirements on inside and outside roughness and hardness. The inside roughness is Ra≤0.6 and the Hardness is HV≤90. During the special process of manufacturing, we choose the best rolling plan and bright anneal, thus achieving inside surface bright and smooth.
Nowadays, generally, in the selection of material used in high purity and cleanliness tubing system, 316L has become standardized preferred materials. Sensitive and corrosive medium transmission pays particular attention to the cleanliness of material. The high-tech industry has experience showing that this choice whether from the technical or commercial perspective is a success.